KILROY REALTY CORP
10-K, 2000-03-21
REAL ESTATE INVESTMENT TRUSTS
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                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549
                                   FORM 10-K
(MARK ONE)
[X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
    ACT OF 1934

                  For the fiscal year ended December 31, 1999

                                      OR

[_] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
    EXCHANGE ACT OF 1934

   For the transition period from        to

                        Commission file number 1-12675

                           KILROY REALTY CORPORATION
            (Exact name of registrant as specified in its charter)

<TABLE>
   <S>                                       <C>
                   Maryland                                 95-4598246
         (State or other jurisdiction                    (I.R.S. Employer
      of incorporation or organization)                Identification Number)

    2250 East Imperial Highway, Suite 1200                     90245
            El Segundo, California                          (Zip Code)
   (Address of principal executive offices)
</TABLE>

      Registrant's telephone number, including area code: (310) 563-5500

          Securities registered pursuant to Section 12(b) of the Act:

<TABLE>
<CAPTION>
                                             Name of each exchange on which
             Title of each class                       registered
             -------------------             ------------------------------
   <S>                                       <C>
         Common Stock, $.01 par value           New York Stock Exchange
</TABLE>

       Securities registered pursuant to Section 12(g) of the Act: None

   Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to
such filing requirements for the past 90 days. Yes [X] No [_]

   Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to
the best of registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. [_]

   The aggregate market value of the shares of common stock held by non-
affiliates of the registrant was approximately $523,466,200 based on the
closing price on the New York Stock Exchange for such shares on March 10,
2000.

   As of March 10, 2000, 26,173,310 shares of common stock, par value $.01 per
share, were outstanding.

                      DOCUMENTS INCORPORATED BY REFERENCE

   Portions of the Company's Proxy Statement with respect to its 2000 Annual
Meeting of Stockholders to be filed not later than 120 days after the end of
the registrant's fiscal year are incorporated by reference into Part III
hereof.

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<PAGE>

                               TABLE OF CONTENTS

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<CAPTION>
                                                                          Page
                                                                          ----
                                  PART I

 <C>      <S>                                                             <C>
 Item 1.  Business......................................................    1

 Item 2.  Properties....................................................   14

 Item 3.  Legal Proceedings.............................................   24

 Item 4.  Submission of Matters to a Vote of Security Holders...........   24

<CAPTION>
                                 PART II

 <C>      <S>                                                             <C>
 Item 5.  Market for Registrant's Common Equity and Related Stockholder
          Matters.......................................................   25

 Item 6.  Selected Financial Data.......................................   26

 Item 7.  Management's Discussion and Analysis of Financial Condition
          and Results of Operations.....................................   28

 Item 7A. Quantitative and Qualitative Disclosures About Market Risks...   46

 Item 8.  Financial Statements and Supplementary Data...................   48

 Item 9.  Changes in and Disagreements with Accountants on Accounting
          and Financial Disclosure......................................   48

<CAPTION>
                                 PART III

 <C>      <S>                                                             <C>
 Item 10. Directors and Executive Officers of the Registrant............   49

 Item 11. Executive Compensation........................................   49

 Item 12. Security Ownership of Certain Beneficial Owners and              49
          Management....................................................

 Item 13. Certain Relationships and Related Transactions................   49

<CAPTION>
                                 PART IV

 <C>      <S>                                                             <C>
 Item 14. Exhibits, Financial Statement Schedules, and Reports on
          Form 8-K......................................................   50
</TABLE>
<PAGE>

                                    PART I

ITEM 1. BUSINESS

General

   Kilroy Realty Corporation (the "Company") develops, owns, and operates
office and industrial real estate, primarily in Southern California. The
Company, which operates, qualifies, and intends to continue to qualify as a
self-administered and self-managed real estate investment trust ("REIT") for
federal and state income tax purposes, was incorporated in September 1996 and
commenced operations upon the completion of its initial public offering in
January 1997. The Company is the successor to the real estate business of
Kilroy Industries, a California corporation ("KI"), and certain of its
affiliated corporations, partnerships and trusts (collectively, the "Kilroy
Group").

   As of December 31, 1999, the Company's portfolio of stabilized operating
properties was comprised of 84 office buildings encompassing approximately 6.1
million rentable square feet (the "Office Properties") and 87 industrial
buildings encompassing approximately 6.5 million rentable square feet (the
"Industrial Properties" and, together with the Office Properties, the
"Properties"). The Company's stabilized portfolio consists of all of the
Company's Office and Industrial Properties, excluding projects recently
developed by the Company that have not yet reached 95% occupancy ("lease-up"
properties) and projects currently under construction or in pre-development.
As of December 31, 1999, the Office Properties were approximately 96.4% leased
to 395 tenants and the Industrial Properties were approximately 96.9% leased
to 258 tenants. As of December 31, 1999, the Company had seven office
buildings under construction which when completed are expected to encompass an
aggregate of approximately 861,500 rentable square feet. The Company did not
have any properties in lease-up at December 31, 1999 since all of the
properties developed and completed by the Company during 1999 and 1998,
encompassing an aggregate of approximately 862,400 and 1.1 million rentable
square feet, respectively, stabilized during 1999. All but 15 of the Company's
properties are located in Southern California. All of the Company's
development projects are located in Southern California.

   The Company owns its interests in all of its properties through Kilroy
Realty, L.P. (the "Operating Partnership") and Kilroy Realty Finance
Partnership, L.P., a Delaware limited partnership (the "Finance Partnership").
The Company conducts substantially all of its activities through the Operating
Partnership in which, as of December 31, 1999, it owned an approximate 86.8%
general partnership interest. The remaining 13.2% limited partnership interest
in the Operating Partnership was owned by certain of the Company's executive
officers and directors, certain of their affiliates, and other outside
investors. As the sole general partner of the Operating Partnership, the
Company has control over the management of the Operating Partnership, which
owns 151 of the Company's 171 properties. The remaining properties, other than
two properties which are owned by the Operating Partnership through KR-Carmel
Partners and KR-Gateway Partners, two development LLCs (the "Development
LLCs") in which the Company owned a 50% managing interest at December 31,
1999, are owned by the Finance Partnership. Kilroy Realty Finance, Inc., a
wholly owned subsidiary of the Company is the sole general partner of the
Finance Partnership and owns a 1% general partnership interest. The Operating
Partnership owns the remaining 99% limited partnership interest.

   The Company's strategy is to own, develop, acquire, lease and manage Class
A suburban office and industrial real estate properties in select locations in
key suburban submarkets, primarily in Southern California, that the Company
believes have strategic advantages compared to neighboring submarkets.

   At December 31, 1999, the Company's ten largest office tenants represented
approximately 25.0% of total annual base rental revenues, defined as
annualized monthly contractual rents from existing tenants at December 31,
1999 determined in accordance with generally accepted accounting principles,
and its ten largest industrial tenants represented approximately 8.7% of total
annual base rental revenues. Of this amount, its largest tenant, Hughes
Electronics Corporation's Space and Communications Company ("Hughes Space and
Communications"), currently leases approximately 405,300 rentable square feet
of office space under five separate leases, representing approximately 6.4% of
the Company's total annual base rental revenues at

                                       1
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December 31, 1999. The base periods for 95.6% of the Hughes Space and
Communications leases expire in January and July 2004. The base periods for
the remaining Hughes Space and Communications leases expire during the period
from November 2001 through December 2001.

   The Company's five largest office tenants, based on annualized base rental
revenues, include: Hughes Space and Communications, a tenant since 1984 which
is engaged in high-technology commercial activities including satellite
development and related applications such as DirecTV; The Boeing Company;
Epson America, Inc.; Epicor Software Corporation; and Intuit, Inc. The
Company's five largest industrial tenants, based on annualized base rental
revenues, include: Mattel, Inc.; Celestica California, Inc.; Natural
Alternatives International, Inc.; OmniPak (d.b.a. Raven Industries); and Mazda
Motor of America, Inc. (See Item 2: Properties--Tenant Information for further
discussion on the Company's tenant base.)

Business and Growth Strategies

   Growth Strategies. The Company believes that a number of factors will
enable it to continue to achieve growth in Funds From Operations, as defined
by the National Association of Real Estate Investment Trusts, including: (i)
the opportunity to lease available space at attractive rental rates because of
high demand and frictional vacancy levels in the Southern California
submarkets in which most of the properties are located; (ii) the quality and
location of the properties; (iii) the Company's ability to efficiently manage
its assets as a low cost provider of commercial real estate due to its core
capabilities in all aspects of real estate ownership including property
management, leasing, marketing, financing, accounting, legal, construction
management and new development; (iv) the Company's substantial development
pipeline established over the past several years; and (v) the Company's access
to development and leasing opportunities as a result of its significant
relationship with large Southern California corporate tenants, municipalities
and landowners and the Company's 50-year presence in the Southern California
market. Management believes that the Company is well positioned to capitalize
on existing opportunities because of its extensive experience in certain of
its submarkets, its seasoned management team and its proven ability to
acquire, develop, lease and efficiently manage office and industrial
properties.

   Operating Strategies. The Company focuses on enhancing growth in Funds From
Operations, from its properties by: (i) maximizing cash flow from the
properties through active leasing and early renewals, increasing contractual
base rent to current market levels as leases expire and effective property
management; (ii) managing operating expenses through the use of internal
management, leasing, marketing, financing, accounting, legal administration
and construction management functions; (iii) maintaining and developing long-
term relationships with a diverse tenant group; (iv) attracting and retaining
motivated employees by providing financial and other incentives to meet the
Company's operating and financial goals; and (v) continuing to emphasize
capital improvements to enhance the properties' competitive advantages in
their respective markets and improve the efficiency of building systems.

   Development Strategies. The Company and its predecessors have developed
office and industrial properties, including high technology facilities,
primarily located in Southern California, for its own portfolio and for third
parties, since 1947. Over the past several years, the Company has established
a substantial development pipeline in its three target market regions, Los
Angeles, Orange and San Diego Counties. The Company's committed and future
development pipeline (including projects held through joint venture
arrangements) can support future development of over 2.8 million rentable
square feet of office space at a total budgeted cost of over $550 million over
the next four to five years. The Company's strategy is to maintain a
disciplined approach to development by focusing on pre-leasing, phasing and
cost control. During 1999 and 1998, the Company completed 17 buildings
encompassing an aggregate of approximately 2.0 million rentable square feet at
an aggregate cost of approximately $171 million. As of December 31, 1999, the
Company had seven office buildings under construction which when completed are
expected to encompass an aggregate of approximately 861,500 rentable square
feet at a total budgeted cost of approximately $174 million.

   The Company may engage in the additional development of office and/or
industrial properties, primarily in Southern California, when market
conditions support a favorable risk-adjusted return on such development. The

                                       2
<PAGE>

Company's activities with third-party owners in Southern California are
expected to give the Company further access to development opportunities.
There can be no assurance, however, that the Company will be able to
successfully develop any of the properties.

   Financing Policies. The Company's financing policies and objectives are
determined by the Company's Board of Directors. The Company presently intends
to maintain a conservative ratio of debt to total market capitalization (total
debt of the Company as a percentage of the market value of issued and
outstanding shares of common stock, including interests exchangeable therefor,
plus total debt). This ratio may be increased or decreased without the consent
of the Company's stockholders and the Company's organizational documents do
not limit the amount of indebtedness that the Company may incur. At December
31, 1999, total debt constituted approximately 38.8% of the total market
capitalization of the Company. The Company intends to utilize one or more
sources of capital for future growth, which may include undistributed cash
flow, borrowings under the Company's unsecured credit facility (the "Credit
Facility"), the issuance of debt or equity securities and other bank and/or
institutional borrowings. There can be no assurance, however, that the Company
will be able to obtain capital on terms favorable to the Company.

Government Regulations

   Many laws and governmental regulations are applicable to the Company's
properties and changes in these laws and regulations, or their interpretation
by agencies and the courts, occur frequently.

   Costs of Compliance with the Americans with Disabilities Act. Under the
Americans with Disabilities Act of 1990 (the "ADA"), all public accommodations
must meet federal requirements related to access and use by disabled persons.
Although management believes that its properties substantially comply with
present requirements of the ADA, none of its properties have been audited and
investigations of all of its properties have not been conducted to determine
compliance. The Company may incur additional costs of complying with the ADA.
Additional federal, state and local laws also may require modifications to the
Company's properties, or restrict its ability to renovate the properties.
Management cannot predict the ultimate amount of the cost of compliance with
the ADA or other legislation. If the Company incurs substantial costs to
comply with the ADA and any other legislation, its financial condition,
results of operations, cash flow, quoted per share trading price of its common
stock and ability to pay distributions to stockholders could be adversely
affected.

 Environmental Matters

   Costs related to government regulation and private
litigation. Environmental laws and regulations hold the Company liable for the
costs of removal or remediation of certain hazardous or toxic substances
released on its properties. These laws could impose liability without regard
to whether the Company is responsible for, or even knew of, the presence of
the hazardous materials. Government investigations and remediation actions may
have substantial costs and the presence of hazardous wastes on a property
could result in personal injury or similar claims by private plaintiffs. For
instance, if asbestos-containing materials and other hazardous or toxic
substances were found on the Company's properties, third parties might seek
recovery from the Company for personal injuries resulting from the existence
of those substances. As of December 31, 1999, 29 of the Company's properties
contained asbestos-containing materials. Various laws also impose liability on
persons who arrange for the disposal or treatment of hazardous or toxic
substances for the cost of removal or remediation of hazardous substances at
the disposal or treatment facility. These laws often impose liability whether
or not the person arranging for the disposal ever owned or operated the
disposal facility. As the owner and operator of its properties, the Company
may be considered to have arranged for the disposal or treatment of hazardous
or toxic substances.

   Use of hazardous materials by some of our tenants. Some of the Company's
tenants routinely handle hazardous substances and wastes on its properties as
part of their routine operations. Environmental laws and regulations subject
these tenants, and potentially the Company, to liability resulting from such
activities. The Company requires its tenants, in their leases, to comply with
these environmental laws and regulations and to

                                       3
<PAGE>

indemnify the Company for any related liabilities. As of December 31, 1999,
less than 5% of the Company's tenants routinely handled hazardous substances
and/or wastes on the Company's properties as part of their routine operations.
These tenants were primarily involved in the light industrial and warehouse
business and more specifically the light electronics assembly business.
Management does not believe that these activities by its tenants will have any
material adverse effect on the Company's operations. Furthermore, management
is unaware of any material noncompliance, liability or claim relating to
hazardous or toxic substances or petroleum products in connection with any of
the Company's properties.

   Existing conditions at some of our properties. Independent environmental
consultants conducted Phase I or similar environmental site assessments on all
of the Company's properties. Site assessments generally include a historical
review, a public records review, an investigation of the surveyed site and
surrounding properties, and the issuance of a written report. These
assessments do not generally include soil samplings or subsurface
investigations. The Company's site assessments revealed that some of its
properties contain asbestos-containing materials and that historical
operations at or near some of its properties, including the operation of
underground storage tanks, may have caused soil or groundwater contamination.
Prior owners of the affected properties conducted clean-up of contamination in
the soils on the properties and management does not believe that further
clean-up of the soils is required. None of the Company's site assessments
revealed any other environmental liability that management believes would have
a material adverse effect on the Company's business, assets, or results of
operations. Management is not aware of any such condition, liability, or
concern by any other means that would give rise to material environmental
liability. However, the assessments may have failed to reveal all
environmental conditions, liabilities, or compliance concerns; there may be
material environmental conditions, liabilities, or compliance concerns that
arose at a property after the review was completed; future laws, ordinances or
regulations may impose material additional environmental liability; and
current environmental conditions at the Company's properties may be affected
in the future by tenants, third parties, or the condition of land or
operations near its properties (such as the presence of underground storage
tanks). The Company cannot give assurance that the costs of future
environmental compliance will not affect its ability to make distributions to
stockholders.

   Environmental insurance coverage limits. The Company carries what
management believes to be sufficient environmental insurance to cover any
potential liability for soil and groundwater contamination at the affected
sites identified in the environmental site assessments. However, management
cannot provide any assurance that the Company's insurance coverage will be
sufficient or that its liability, if any, will not have a material adverse
effect on the Company's financial condition, results of its operations, cash
flow, quoted per share trading price of its common stock and ability to pay
distributions to stockholders.

   Other federal, state and local regulations. The Company's properties are
subject to various federal, state and local regulatory requirements, such as
state and local fire and life safety requirements. If the Company failed to
comply with these various requirements, it might incur governmental fines or
private damage awards. Management believes that the Company's properties are
currently in material compliance with all of these regulatory requirements.
However, management does not know whether existing requirements will change or
whether future requirements will require the Company to make significant
unanticipated expenditures that will adversely affect its ability to make
distributions to its stockholders. The City of Los Angeles adopted regulations
relating to the repair of welded steel moment frames located in certain areas
damaged as a result of the January 17, 1994 Northridge earthquake in Southern
California. Currently, these regulations apply to only one of the Company's
properties representing approximately 78,000 square feet. Management believes
that this property complies with these regulations. Management does not know,
however, whether other regulatory agencies will adopt similar regulations or
whether the Company will acquire additional properties which may be subject to
these or similar regulations. Management believes, based in part on
engineering reports, that all of its properties are in good condition.
However, if the Company were required to make significant expenditures under
applicable regulations, its financial condition, results of operations, cash
flow, quoted per share trading price of its common stock and ability to pay
distributions to stockholders could be adversely affected.

                                       4
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Employees

   As of March 10, 2000, the Company, through the Operating Partnership and
Kilroy Services, Inc., an unconsolidated subsidiary of the Company ("KSI"),
employed 130 persons. Of the Company's total 130 employees, approximately 40
are employed as on-site building employees who provide services for the
Company's properties. The Company, the Operating Partnership and KSI believe
that relations with their employees are good.

Business Risks

   This document contains certain forward-looking statements (as such term is
defined in Section 27A of the Securities Act of 1933, as amended (the "1933
Act"), and Section 21E of the Exchange Act of 1934, as amended (the "1934
Act")) pertaining to, among other things, the Company's future results of
operations, cash available for distribution, property acquisitions, lease
renewals, increases in base rent, fee development activities, sources of
growth, planned development and expansion of owned or leased property, capital
requirements, compliance with contractual obligations and general business,
industry and economic conditions applicable to the Company. These statements
are based largely on the Company's current expectations and are subject to a
number of risks uncertainties. Actual results could differ materially from
these forward-looking statements. Factors that can cause actual results to
differ materially include, but are not limited to, those discussed below.
Readers are cautioned not to place undue reliance on these forward-looking
statements, which speak only as of the date hereof. The following factors
should be considered in addition to the other information contained herein in
evaluating the Company and its business:

   Most of the Company's properties depend upon the Southern California
economy. As of December 31, 1999, 86.5% of the aggregate square footage of the
Company's stabilized portfolio and 87.9% of the Company's annualized base
rent, excluding expense reimbursements and rental abatements, came from
properties located in Southern California. The Company's ability to make
expected distributions to stockholders depends on its ability to generate
Funds from Operations in excess of scheduled principal payments on debt,
payments on the preferred limited partnership units issued by the Operating
Partnership, and capital expenditure requirements. Events and conditions
applicable to owners and operators of real property that are beyond the
Company's control may decrease funds available for distribution and the value
of the Company's properties. These events include: local oversupply or
reduction in demand of office, industrial or other commercial space; inability
to collect rent from tenants; vacancies or inability to rent spaces on
favorable terms; inability to finance property development and acquisitions on
favorable terms; increased operating costs, including insurance premiums,
utilities, and real estate taxes; costs of complying with changes in
governmental regulations; the relative illiquidity of real estate investments;
changing submarket demographics and property damage resulting from seismic
activity. The geographical concentration of the Company's properties may
expose it to greater economic risks than if it owned properties in several
geographic regions. Any adverse economic or real estate developments in the
Southern California region could adversely impact the Company's financial
condition, results from operations and cash flows.

   The Company's significant debt level reduces cash available for
distribution and may expose the Company to the risk of default under its debt
obligations. Payments of principal and interest on borrowings may leave the
Company with insufficient cash resources to operate its properties or to pay
distributions necessary to maintain its REIT qualification. The Company's
level of debt and the limitations imposed by its debt agreements may have
important consequences on the Company, including the following: cash flow may
be insufficient to meet required principal and interest payments; the Company
may be unable to refinance its indebtedness at maturity or the refinancing
terms may be less favorable than the terms of its original indebtedness; the
Company may be forced to dispose of one or more of its properties, possibly on
disadvantageous terms; the Company may default on its obligations and the
lenders or mortgagees may foreclose on the properties that secure the loans
and receive an assignment of rents and leases; and the Company's default under
one mortgage loan with cross default provisions could result in a default on
other indebtedness. If any one of these events were to occur, the Company's
financial position, results of operations, cash flow, quoted per share trading
price of its common stock

                                       5
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and ability to pay distributions to stockholders could be adversely affected.
In addition, foreclosures could create taxable income without accompanying
cash proceeds, a circumstance which could hinder the Company's ability to meet
the strict REIT distribution requirements imposed by the Internal Revenue Code
of 1986, as amended. As of December 31, 1999, the Company had $554 million
aggregate principal amount of indebtedness, $4.8 million of which is due prior
to December 31, 2000. The Company's total debt represented 38.8% of its total
market capitalization at December 31, 1999.

   The Company faces significant competition which may decrease the occupancy
and rental rates of its properties. The Company competes with several
developers, owners and operators of office, industrial and other commercial
real estate, many of which have higher vacancy rates. Substantially all of the
Company's properties are located in areas with similar properties as its
competitors. For instance, occupancy rates in the Company's El Segundo and
Long Beach office property portfolios at December 31, 1999 were 99.0% and
95.6%, respectively, in comparison to 86.4% and 86.5%, respectively, for the
El Segundo and Long Beach office submarkets in total. In addition, the
occupancy rate in the Company's Anaheim industrial property portfolio at
December 31, 1999 was 100.0% in comparison to 94.2% for the Anaheim industrial
property submarket in total. The Company believes that its lower vacancy rates
means that, on average, its competitors have more space currently available
for lease than the Company. As a result, the Company's competitors have an
incentive to decrease rental rates until their available space is leased. If
the Company's competitors offer space at rental rates below current market
rates, the Company may be pressured to reduce its rental rates below those
currently charged in order to retain tenants when its tenant leases expire. As
a result, the Company's financial condition, results of operations and cash
flows may be adversely affected.

   Potential losses may not be covered by insurance. The Company carries
comprehensive liability, fire, extended coverage and rental loss insurance
covering all of its properties. Management believes the policy specifications
and insured limits are appropriate given the relative risk of loss, the cost
of the coverage and industry practice. The Company does not carry insurance
for generally uninsured losses such as loss from riots or acts of God. Some of
the Company's policies, like those covering losses due to floods, are insured
subject to limitations involving large deductibles or co-payments and policy
limits. In addition, the Company carries earthquake insurance on properties
located in areas known to be subject to earthquakes in an amount and with
deductions which management believes are commercially reasonable. As of
December 31, 1999, 81 of the Office Properties aggregating 5.6 million square
feet (representing 44.5% of the Company's stabilized portfolio based on
aggregate square footage and 64.4% based on annualized base rent) were located
in areas known to be subject to earthquakes. As of December 31, 1999, 75 of
the Company's Industrial Properties aggregating 5.3 million square feet
(representing 42.0% of the Company's stabilized portfolio based on aggregate
square footage and 23.5% based on annualized base rent) were located in areas
known to be subject to earthquakes. While the Company presently carries
earthquake insurance on these properties, the amount of its earthquake
insurance coverage may not be sufficient to cover losses from earthquakes. In
addition, the Company may discontinue earthquake insurance on some or all of
its properties in the future if the cost of premiums for earthquake insurance
exceeds the value of the coverage discounted for the risk of loss. If the
Company experiences a loss which is uninsured or which exceeds policy limits,
it could lose the capital invested in the damaged properties as well as the
anticipated future revenue from those properties. In addition, if the damaged
properties are subject to recourse indebtedness, the Company would continue to
be liable for the indebtedness, even if the properties were unrepairable.

   The Company may be unable to successfully complete and operate developed
properties. Property development involves the following significant risks: the
Company may be unable to obtain construction financing on favorable terms; the
Company may be unable to obtain permanent financing at all or on advantageous
terms if development projects are financed through construction loans; the
Company may not complete development projects on schedule or within budgeted
amounts; the Company may encounter delays or refusals in obtaining all
necessary zoning, land use, building, occupancy, and other required
governmental permits and authorizations; the Company may expend funds on and
devote management's time to projects which the Company may not complete; and
the Company may lease the developed properties at below expected rental

                                       6
<PAGE>

rates. For example, one of the Company's development projects was completed
three months later than initially projected, resulting in a corresponding
delay in the commencement of leasing activity at the particular property. The
delay was attributable to bad weather conditions which inhibited construction
during the "El Nino" climate condition which ran from 1997 through 1998. In
addition, during the fourth quarter of 1998, the Company withdrew its
participation from a master planned commercial development prior to the
commencement of construction. If any one of these events were to occur in
connection with projects currently under development, the Company's financial
position, results of operations, cash flow, quoted per share trading price of
its common stock and ability to pay distributions to stockholders could be
adversely affected. While the Company primarily develops office and industrial
properties in Southern California markets, it may in the future develop
properties for retail or other use and expand its business to other geographic
regions where it expects the development of property to result in favorable
risk-adjusted returns on its investment. Presently, the Company does not
possess the same level of familiarity with development of other property types
or outside markets which could adversely affect its ability to develop
properties or to achieve expected performance.

   The Company may be unable to complete acquisitions and successfully operate
acquired properties. The Company may acquire office and industrial properties
when strategic opportunities exist. The Company's ability to acquire
properties on favorable terms and successfully operate them is subject to the
following risks: the potential inability to acquire a desired property because
of competition from other real estate investors with significant capital,
including both publicly traded REITs and institutional investment funds; even
if the Company enters into agreements for the acquisition of office and
industrial properties, these agreements are subject to customary conditions to
closing, including completion of due diligence investigations to management's
satisfaction; the Company may be unable to finance the acquisition on
favorable terms; the Company may spend more than budgeted amounts to make
necessary improvements or renovations to acquired properties; and the Company
may lease the acquired properties at below expected rental rates. If the
Company cannot finance property acquisitions on favorable terms or operate
acquired properties to meet financial expectations, its financial position,
results of operations, cash flow, quoted per share trading price of its common
stock and ability to pay distributions to stockholders could be adversely
affected.

   The Company could default on leases for land on which some of its
properties are located. The Company owns ten office buildings located on
various parcels, each of which the Company leases on a long-term basis. If the
Company defaults under the terms of any particular lease, it may lose the
property subject to the lease. The Company may not be able to renegotiate a
new lease on favorable terms, if at all, upon expiration of the lease and all
of its options. The loss of these properties or an increase of rental expense
would have an adverse effect on the Company's financial position, results of
operations, cash flow, quoted per share trading price of its common stock and
ability to pay distributions to stockholders. The Company has approximately
1.5 million aggregate rentable square feet of rental space located on these
leased parcels. The leases for the land under the SeaTac Office Center,
including renewal options, expire in 2062. The lease for the land under
9455 Towne Center in San Diego expires in October 2043. The primary lease for
the land under 12312 West Olympic Boulevard in Santa Monica expire in January
2065 with a smaller secondary lease expiring in September 2011. The leases for
the land under the Kilroy Airport Center, Long Beach expire in 2035.

   The Company depends on significant tenants. At December 31, 1999, the
Company's ten largest office tenants represented approximately 25.0% of total
annual base rental revenues and its ten largest industrial tenants represented
approximately 8.7% of total annual base rental revenues. Of this amount, its
largest tenant, Hughes Space and Communications, currently leases
approximately 405,300 rentable square feet of office space, representing
approximately 6.4% of the Company's total annual base rental revenues. The
Company's revenue and cash available for distribution to stockholders would be
disproportionately and materially adversely affected if any of its significant
tenants were to become bankrupt or insolvent, or suffer a downturn in their
business, or fail to renew their leases at all or on terms less favorable to
the Company than their current terms.

   Downturns in tenants' businesses may reduce the Company's cash flow. As of
December 31, 1999, the Company derived 98.0% of its revenues from rental
income and tenant reimbursements. A tenant may experience a downturn in its
business, which may weaken its financial condition and result in its failure
to make timely

                                       7
<PAGE>

rental payments. In the event of default by a tenant, the Company may
experience delays in enforcing its rights as landlord and may incur
substantial costs in protecting its investment. The bankruptcy or insolvency
of a major tenant also may adversely affect the income produced by the
Company's properties. If any tenant becomes a debtor in a case under the
Bankruptcy Code, the Company cannot evict the tenant solely because of the
bankruptcy. On the other hand, the bankruptcy court might authorize the tenant
to reject and terminate its lease. The Company's claim against the tenant for
unpaid, future rent would be subject to a statutory cap that might be
substantially less than the remaining rent actually owed under the lease. Even
so, the Company's claim for unpaid rent would likely not be paid in full. This
shortfall could adversely affect the Company's cash flow and its ability to
make distributions to stockholders. Although the Company has not experienced
material losses from tenant bankruptcies, its tenants could file for
bankruptcy protection in the future.

   The Company may be unable to renew leases or re-let space as leases
expire. As of December 31, 1999, leases representing 11.2% and 14.2% of the
square footage of the Company's properties will expire in 2000 and 2001. Above
market rental rates on some of the Company's properties may force it to renew
or re-lease some expiring leases at lower rates. While the Company believes
that the average rental rates for most of its properties are below quoted
market rates in each of its submarkets, the Company cannot give any assurance
that leases will be renewed or that its properties will be re-leased at rental
rates equal to or above the current rental rates. If the rental rates for the
Company's properties decrease, existing tenants do not renew their leases, or
the Company does not re-lease a significant portion of its available space,
its financial position, results of operations, cash flow, quoted per share
trading price of its common stock and ability to pay distributions to its
stockholders would be adversely affected.

   Real estate assets are illiquid and the Company may not be able to sell its
properties when it desires. The Company's investments in its properties are
relatively illiquid which limits the Company's ability to sell its properties
quickly in response to changes in economic or other conditions. Limitations in
the Internal Revenue Code and related Treasury Regulations applicable to REITs
may also limit the Company's ability to sell its properties. These
restrictions on the Company' ability to sell its properties could have an
adverse effect on its financial position, results from operations, cash flow,
quoted per share trading price of its common stock and ability to pay
distributions to stockholders.

   KSI is subject to tax liabilities on net income which reduces the Company's
cash flow. KSI is subject to federal and state income tax on its taxable
income at regular corporate rates. Any federal, state or local income taxes
that KSI must pay will reduce the cash available for distribution to the
Operating Partnership and, ultimately, to the Company's stockholders.

   The Company cannot depend upon distributions from KSI because its business
is not controlled by the Company. The Company has set up the following
structure to comply with the REIT asset tests that restrict its ability to own
shares of other corporations: the Operating Partnership owns 100% of the non-
voting preferred stock of KSI, representing approximately 95.0% of its
economic value; and John B. Kilroy, Sr. and John B. Kilroy, Jr., the Company's
Chairman of the Board of Directors and President and Chief Executive Officer,
respectively, own all of the outstanding voting common stock of KSI,
representing approximately 5.0% of its economic value. The Company receives
substantially all of the economic benefit derived from KSI's business by
virtue of the dividends that the Company receives from its investment in the
preferred stock. However, the Company cannot influence KSI's operations, elect
its directors, appoint its officers, or require its Board of Directors to
declare and pay a cash dividend on the nonvoting preferred stock owned by the
Operating Partnership. As a result, KSI may make decisions or pursue business
policies which could have an adverse effect on the Company's financial
position, results of operations, cash flow, quoted per share trading price of
its common stock and ability to pay distributions to stockholders.

   KSI may be adversely affected by the Company's REIT status. Changes in the
requirements for REIT qualification may in the future limit the Company's
ability to receive increased distributions from the fee development operations
and related services offered by KSI.

                                       8
<PAGE>

   Common limited partners of the Operating Partnership have limited approval
rights which may prevent the Company from completing a change of control
transaction which may be in the best interests of stockholders. The Company
may not withdraw from the Operating Partnership or transfer its general
partnership interest or admit another general partner without the approval of
a majority of the common limited partnership unitholders except in the case of
a "termination transaction" which requires the approval of 60% of the common
unitholders, including the Company, because of the common units it holds in
its capacity as general partner. The right of common limited partners to vote
on these transactions could limit the Company's ability to complete a change
of control transaction that might otherwise be in the best interest of its
stockholders.

   Limited partners of the Operating Partnership must approve the dissolution
of the Operating Partnership and the disposition of properties they
contributed. For as long as limited partners own at least 5% of all of the
common units of the Operating Partnership, the Company must obtain the
approval of limited partners holding a majority of the common units before it
may dissolve the partnership or sell the property located at
2260 East Imperial Highway at Kilroy Airport Center in El Segundo prior to
January 31, 2004. In addition, the Company may not sell 11 of its properties
prior to October 31, 2002 without the consent of the limited partners that
contributed the properties to the Operating Partnership, except in connection
with the sale or transfer of all or substantially all of its assets or those
of the Operating Partnership or in connection with a transaction which does
not cause the limited partners that contributed the property to recognize
taxable income. In addition, the Operating Partnership agreed to use
commercially reasonable efforts to minimize the tax consequences to common
limited partners resulting from the repayment, refinancing, replacement or
restructuring of debt, or any sale, exchange or other disposition of any of
its other assets. The exercise of one or more of these approval rights by the
limited partners could delay or prevent the Company from completing a
transaction which may be in the best interest of its stockholders.

 The Company's Chairman of the Board of Directors and its President and Chief
 Executive Officer each have potential conflicts of interest with the Company.

   The Company's Chairman of the Board of Directors and its President and
Chief Executive Officer each are engaged in competitive real estate
activities. The Company owns four office buildings and four industrial
buildings in the El Segundo submarket. John B. Kilroy, Sr. and John B. Kilroy,
Jr., the Company's Chairman of the Board of Directors and President and Chief
Executive Officer, respectively, own controlling interests in partnerships
which own a complex of three office buildings in the same submarket. The
Operating partnership manages the complex pursuant to a management agreement
on market terms. Policies adopted by the Company's Board of Directors to
minimize this conflict, including the requirement that John B. Kilroy, Sr. and
John B. Kilroy, Jr. enter into non-competition agreements with the Company,
may not eliminate their influence over transactions involving these competing
properties.

   The Company's Chairman of the Board of Directors and its President and
Chief Executive Officer each have substantial influence over the Company's
affairs. John B. Kilroy, Sr. and John B. Kilroy, Jr., the Company's Chairman
of the Board of Directors and President and Chief Executive Officer,
respectively, together hold two of the six seats on the Company's Board of
Directors. They also beneficially own common limited partnership units
exchangeable for an aggregate of 2,158,639 shares of the Company's common
stock and currently vested options to purchase an aggregate of 350,000 shares
of common stock, representing a total of approximately 9.02% of the total
outstanding shares of common stock as of December 31, 1999. Pursuant to the
Company's charter no other stockholder may own, actually or constructively,
more than 7.0% of the Company's common stock. The Board of Directors has
already waived the ownership limits with respect to John B. Kilroy, Sr.,
John B., Kilroy, Jr., members of their families and some affiliated entities.
Consequently, Messrs. Kilroy have substantial influence on the Company and
could exercise their influence in a manner that is not in the best interest of
the Company's stockholders. Also, they may, in the future, have a substantial
influence on the outcome of any matters submitted to the Company's
stockholders for approval.

                                       9
<PAGE>

   There are limits on the ownership of the Company's capital stock which
limit the opportunities for a change of control at a premium to existing
stockholders. Provisions of the Maryland General Corporation Law, the
Company's charter, the Company's bylaws, and the Operating Partnership's
partnership agreement may delay, defer, or prevent a change in control over
the Company or the removal of existing management. Any of these actions might
prevent the stockholders from receiving a premium for their shares of stock
over the then prevailing market prices.

   The Internal Revenue Code sets forth stringent ownership limits on the
Company as a result of its decision to be taxed as a REIT, including: no more
than 50% in value of the Company's capital stock may be owned, actually or
constructively, by five or fewer individuals, including some entities, during
the last half of a taxable year; subject to exceptions, the Company's common
stock shares must be held by a minimum of 100 persons for at least 335 days of
a 12-month taxable year, or a proportionate part of a short taxable year; and
if the Company, or any entity which owns 10% or more of its capital stock,
actually or constructively owns 10% or more of one of the Company's tenants,
or a tenant of any partnership in which the Company is a partner, then any
rents that the Company receives from that tenant in question will not be
qualifying income for purposes of the Internal Revenue Code's REIT gross
income tests regardless of whether the Company receives the rents directly or
through a partnership.

   The Company's charter establishes clear ownership limits to protect its
REIT status. No single stockholder may own, either actually or constructively,
more than 7.0% of the Company's common stock outstanding. Similarly, no single
holder of the Company's Series A Preferred Stock, Series C Preferred Stock and
Series D Preferred Stock may actually or constructively own any class or
series of its preferred stock, so that their total capital stock ownership
would exceed 7.0% by value of the Company's total capital stock, and no single
holder of Series B Preferred Stock, if issued, may actually or constructively
own more than 7.0% of the Company's Series B Preferred Stock.

   The Board of Directors may waive the ownership limits if it is satisfied
that the excess ownership would not jeopardize the Company's REIT status and
if it believes that the waiver would be in the Company's best interests. The
Board of Directors has already waived the ownership limits with respect to
John B. Kilroy, Sr., John B. Kilroy, Jr., members of their families and some
affiliated entities. These named individuals and entities may own either
actually or constructively, in the aggregate, up to 21% of the outstanding
common stock.

   If anyone acquires shares in excess of any ownership limits, the transfer
to the transferee will be void with respect to these excess shares; the excess
shares will be automatically transferred from the transferee or owner to a
trust for the benefit of a qualified charitable organization, the purported
transferee or owner will have no right to vote those excess shares, and the
purported transferee or owner will have no right to receive dividends or other
distributions from these excess shares.

 The Company's charter contains provisions that may delay, defer, or prevent a
 change of control transaction.

   The Company's Board of Directors is divided into classes that serve
staggered terms. The Company's Board of Directors is divided into three
classes with staggered terms. The staggered terms for directors may reduce the
possibility of a tender offer or an attempt to complete a change of control
transaction even if a tender offer or a change in control was in the Company's
stockholders' interest.

   The Company could issue preferred stock without stockholder approval. The
Company's charter authorizes its Board of Directors to issue up to 30,000,000
shares of preferred stock, including convertible preferred stock, without
stockholder approval. The Board of Directors may establish the preferences,
rights and other terms, including the right to vote and the right to convert
into common stock any shares issued. The issuance of preferred stock could
delay or prevent a tender offer or a change of control even if a tender offer
or a change of control was in the Company's stockholders' interest. The
Operating Partnership has issued 1,500,000 Series A Cumulative Redeemable
Preferred units which in the future may be exchanged one-for-one into shares
of 8.075% Series A Cumulative Redeemable Preferred stock, 700,000 Series C
Cumulative Redeemable Preferred units

                                      10
<PAGE>

which in the future may be exchanged one for one into shares of 9.375% Series
C Cumulative Redeemable Preferred stock, and 900,000 Series D Cumulative
Redeemable Preferred units which in the future may be exchanged one for one
into shares of 9.250% Series D Cumulative Redeemable Preferred stock. In
addition, the Company has designated and authorized the issuance of up to
400,000 shares of Series B Junior Participating Preferred stock. However, no
shares of preferred stock of any series are currently issued or outstanding.

   The Company has a stockholders' rights plan. In October 1998, the Company's
Board of Directors adopted a stockholders' rights plan. The rights have anti-
takeover effects and would cause substantial dilution to a person or group
that attempts to acquire the Company on terms that the Company's Board of
Directors does not approve. The Company may redeem the shares for $.01 per
right, prior to the time that a person or group has acquired beneficial
ownership of 15% or more of its common stock. Therefore, the rights should not
interfere with any merger or business combination approved by the Company's
Board of Directors.

   The staggered terms for directors, the future issuance of additional common
or preferred stock and the Company's stockholders rights plan may: delay or
prevent a change of control, even if a change of control might be beneficial
to the Company's stockholders; deter tender offers that may be beneficial to
the Company's stockholders; or limit stockholders' opportunity to receive a
potential premium for their shares if an investor attempted to gain shares
beyond the Company's ownership limits or otherwise to effect a change of
control.

   Loss of the Company's REIT status would have significant adverse
consequences to it and the value of the Company's stock. The Company currently
operates and has operated since 1997 in a manner that is intended to allow it
to qualify as a REIT for federal income tax purposes under the Internal
Revenue Code. If the Company were to lose its REIT status, it would face
serious tax consequences that would substantially reduce the funds available
for distribution to stockholders for each of the years involved because: the
Company would not be allowed a deduction for distributions to stockholders in
computing its taxable income and would be subject to federal income tax at
regular corporate rates; the Company could be subject to the federal
alternative minimum tax and possibly increased state and local taxes; and
unless entitled to relief under statutory provisions, the Company could not
elect to be subject to tax as a REIT for four taxable years following the year
during which it was disqualified. In addition, if the Company fails to qualify
as a REIT, it will not be required to make distributions to stockholders and
all distributions to stockholders will be subject to tax as ordinary income to
the extent of the Company's current and accumulated earnings and profits. As a
result of all these factors, the Company's failure to qualify as a REIT also
could impair its ability to expand its business and raise capital, and would
adversely affect the value of the Company's common stock.

   Qualification as a REIT involves the application of highly technical and
complex Internal Revenue Code provisions for which there are only limited
judicial and administrative interpretations. The complexity of these
provisions and of the applicable treasury regulations that have been
promulgated under the Internal Revenue Code is greater in the case of a REIT
that holds its assets through a partnership. The determination of various
factual matters and circumstances not entirely within the Company's control
may affect its ability to qualify as a REIT. For example, in order to qualify
as a REIT, at least 95% of the Company's gross income in any year must be
derived from qualifying sources. Also, the Company must make distributions to
stockholders aggregating annually at least 95% of its net taxable income,
excluding capital gains. In addition, legislation, new regulations,
administrative interpretations or court decisions may adversely affect the
Company's investors or the Company's ability to qualify as a REIT for tax
purposes. Although management believes that the Company is organized and
operates in a manner so as to qualify as a REIT, no assurance can be given
that the Company will continue to be organized or be able to operate in a
manner so as to qualify or remain qualified as a REIT for tax purposes.

   To maintain its REIT status, the Company may be forced to borrow funds on a
short-term basis during unfavorable market conditions. In order to maintain
its REIT status, the Company may need to borrow funds on a short-term basis to
meet the REIT distribution requirements even if the then prevailing market
conditions are not favorable for these borrowings. To qualify as a REIT, the
Company generally must distribute to its stockholders at least 95% of the
Company's net taxable income each year, excluding capital gains. In addition,
the Company will be subject to a 4% nondeductible excise tax on the amount, if
any, by which certain

                                      11
<PAGE>

distributions paid in any calendar year are less than the sum of 85% of its
ordinary income, 95% of its capital gain net income and 100% of its
undistributed income from prior years. These short-term borrowing needs could
result from differences in timing between the actual receipt of income and
inclusion of income for federal income tax purposes, or the effect of non-
deductible capital expenditures, the creation of reserves or required debt or
amortization payments.

   The Company's growth depends on external sources of capital which are
outside of the Company's control. The Company is required under the Internal
Revenue Code to distribute at least 95% of its taxable income, determined
without regard to the dividends-paid deduction and excluding any net capital
gain. Because of this distribution requirement, it may not be able to fund
future capital needs, including any necessary acquisition financing, from
operating cash flow. Consequently, management relies on third-party sources of
capital to fund the Company's capital needs. The Company may not be able to
obtain the financing on favorable terms or at all. Any additional debt the
Company incurs will increase its leverage. Access to third-party sources of
capital depends, in part, on: general market conditions; the market's
perception of the Company's growth potential; the Company's current and
expected future earnings; the Company's cash distributions; and the market
price per share of the Company's common stock. If the Company cannot obtain
capital from third-party sources, it may not be able to acquire properties
when strategic opportunities exist or make the cash distributions to
stockholders necessary to maintain its qualification as a REIT.

 The Company's Board of Directors may change investment and financing policies
 without stockholder approval and become more highly leveraged which may
 increase the Company's risk of default under its debt obligations.

   The Company is not limited in its ability to incur debt. The Company's
Board of Directors adopted a policy of limiting indebtedness to approximately
50% of the Company's total market capitalization. Total market capitalization
is the market value of the Company's capital stock, including interests and
units exchangeable for shares of capital stock, plus total debt. However, the
Company's organizational documents do not limit the amount or percentage of
indebtedness, funded or otherwise, that it may incur. The Company's Board of
Directors may alter or eliminate management's current policy on borrowing at
any time without stockholder approval. If this policy changed, the Company
could become more highly leveraged which would result in an increase in its
debt service and which could adversely affect cash flow and the ability to
make expected distributions to stockholders. Higher leverage also increases
the risk of default on the Company's obligations.

   The Company may issue additional shares of capital stock without
stockholder approval that may dilute shareholder investment. The Company may
issue shares of its common stock, preferred stock or other equity or debt
securities without stockholder approval. Similarly, the Company may cause the
Operating Partnership to offer its common or preferred units for contributions
of cash or property without approval by the limited partners of the Operating
Partnership or the Company's stockholders. Existing stockholders have no
preemptive rights to acquire any of these securities, and any issuance of
equity securities under these circumstances may dilute a stockholder's
investment.

   The Company may invest in securities related to real estate which could
adversely affect its ability to make distributions to stockholders. The
Company may purchase securities issued by entities which own real estate and
may, in the future, also invest in mortgages. In general, investments in
mortgages include several risks, including: borrowers may fail to make debt
service payments or pay the principal when due; the value of the mortgaged
property may be less than the principal amount of the mortgage note securing
the property; and interest rates payable on the mortgages may be lower than
the Company's cost for the funds used to acquire these mortgages. Owning these
securities may not entitle the Company to control the ownership, operation and
management of the underlying real estate. In addition, the Company may have no
control over the distributions with respect to these securities, which could
adversely affect its ability to make distributions to stockholders.

   Sales of a substantial number of shares of common stock, or the perception
that this could occur, could result in decreasing the market price per share
for the Company's common stock. Management cannot predict

                                      12
<PAGE>

whether future issuances of shares of the Company's common stock or the
availability of shares for resale in the open market will result in decreasing
the market price per share of its common stock.

   As of December 31, 1999, 27,808,410 shares of the Company's common stock
were issued and outstanding and the Company had reserved for future issuance
the following shares of common stock: 4,228,702 shares issuable upon the
exchange, at the Company's option, of common units issued in connection with
the formation of the Operating Partnership and in connection with property
acquisitions; 2,900,000 shares issuable under the Company's 1997 Stock Option
and Incentive Plan; and 1,000,000 shares issuable under the Company's Dividend
Reinvestment and Direct Stock Purchase Plan. Of the 27,808,410 shares of
common stock presently outstanding, all but 40,000 shares may be freely traded
in the public market by persons other than the Company's affiliates. In
addition, the Company has filed or has agreed to file registration statements
covering all of the shares of common stock reserved for future issuance.
Consequently, if and when the shares are issued, they may be freely traded in
the public markets.

                                      13
<PAGE>

ITEM 2. PROPERTIES

General

   As of December 31, 1999, the Company's portfolio of stabilized operating
properties was comprised of 84 Office Properties encompassing approximately
6.1 million rentable square feet and 87 Industrial Properties encompassing
approximately 6.5 million rentable square feet. The Company's stabilized
portfolio consists of all of the Company's Office and Industrial Properties,
excluding projects recently developed by the Company that have not yet reached
95% occupancy ("lease-up" properties) and projects currently under
construction or in pre-development. As of December 31, 1999, the Office
Properties were approximately 96.4% leased to 395 tenants and the Industrial
Properties were approximately 96.9% leased to 258 tenants. All but 15 of the
Company's properties are located in Southern California.

   As of December 31, 1999, the Company had seven office buildings under
construction which when completed are expected to encompass an aggregate of
approximately 861,500 rentable square feet. The Company did not have any
properties in lease-up at December 31, 1999 since all of the properties
developed and completed by the Company during 1999 and 1998 stabilized during
1999. All of the Company's development projects are located in Southern
California.

   In general, the Office Properties are leased to tenants on a full service
gross basis and the Industrial Properties are leased to tenants on a triple
net basis. Under a full service lease, the landlord is obligated to pay the
tenant's proportionate share of taxes, insurance and operating expenses up to
the amount incurred during the tenant's first year of occupancy ("Base Year")
or a negotiated amount approximating the tenant's pro rata share of real
estate taxes, insurance and operating expenses ("Expense Stop"). The tenant
pays its pro-rata share of increases in expenses above the Base Year or
Expense Stop. Under a triple net lease, tenants pay their proportionate share
of real estate taxes, operating costs and utility costs.

   The Company believes that all of its properties are well maintained and,
based on engineering reports obtained within the last five years, do not
require significant capital improvements. As of December 31, 1999, the Company
managed all of its 84 Office Properties and 80 of its 87 Industrial Properties
through internal property managers.

                                      14
<PAGE>

The Office and Industrial Properties

   The following table sets forth certain information relating to each of the
Office and Industrial Properties owned as of December 31, 1999. The Company
(through the Operating Partnership and the Finance Partnership) owns a 100%
interest in all of the Office and Industrial Properties, except for the three
buildings located at 3579 Valley Center Drive and 5005/5010 Wateridge Vista
Drive in which the Company owns a 50% interest through the Development LLCs,
and the five office properties located at Kilroy Airport Center, Long Beach,
three office properties located at the SeaTac Office Center, one office
property located at 2100 Colorado Blvd. in Santa Monica, California and one
office property located at 9455 Towne Center Drive in San Diego, California,
each of which are held subject to leases for the land on which the properties
are located expiring in 2035, 2062, 2065 and 2043 (assuming the exercise of
the Company's options to extend such leases), respectively.

<TABLE>
<CAPTION>
                                                                                          Average
                                            Year        Net     Percentage    Annual     Base Rent
                                 No. of    Built/    Rentable    Leased at   Base Rent  Per Sq. Ft.
      Property Location         Buildings Renovated Square Feet 12/31/99(1) ($000's)(2)   ($)(3)
      -----------------         --------- --------- ----------- ----------- ----------- -----------
<S>                             <C>       <C>       <C>         <C>         <C>         <C>
Office Properties:
Los Angeles County
26541 Agoura Road
 Calabasas, California(7).....       1         1988     90,878     100.0%     $1,955      $21.51
5151-5155 Camino Ruiz
 Camarillo, California(7)(4)..       4         1982    276,216     100.0%      2,678        9.69
4880 Santa Rosa Road
 Camarillo, California(7).....       1         1998     41,131     100.0%        732       17.80
Kilroy Airport Center, El
 Segundo 2250 E. Imperial
 Highway(5)...................       1         1983    291,187      95.9%      4,755       16.33
 2260 E. Imperial Highway(6)..       1         1983    291,187     100.0%      7,677       26.37
 2240 E. Imperial Highway(8)..       1         1983    118,933     100.0%      1,868       15.71
 El Segundo,  California
185 S. Douglas Street
 El Segundo, California(7)....       1         1978     60,000     100.0%      1,523       25.38
525 N. Brand Blvd.
 Glendale, California.........       1         1990     43,647     100.0%      1,254       28.73
Kilroy Airport Center, Long
 Beach 3900 Kilroy Airport
 Way..........................       1         1987    126,840      94.4%      2,695       21.24
 3880 Kilroy Airport Way......       1         1987     98,243     100.0%      1,325       13.49
 3760 Kilroy Airport Way......       1         1989    165,279      85.8%      3,428       20.74
 3780 Kilroy Airport Way......       1         1989    219,743      99.5%      5,038       22.93
 3760 Kilroy Airport Way......       1         1989     10,592     100.0%         66        6.24
 Phase III-Bldg 8, Long Beach,
  Calif.......................       1         1999    136,026     100.0%      3,911       28.76
12312 W. Olympic Blvd.
 Los Angeles, California(7)...       1    1950/1998     78,000     100.0%      1,608       20.61
12100-12166 West Olympic Blvd.
 Los Angeles, California......       1         1968     48,356      85.9%        583       12.05
2100 Colorado Avenue
 Santa Monica, California(7)..       3         1992     94,844     100.0%      2,791       29.42
1633 26th Street
 Santa Monica, California(7)..       1    1972/1997     43,800     100.0%        845       19.30
3130 Wilshire Blvd.
 Santa Monica, California.....       1    1969/1998     88,338     100.0%      2,224       25.18
501 Santa Monica Blvd.
 Santa Monica, California.....       1         1974     70,089     100.0%      1,689       24.10
2829 Townsgate Road
 Thousand Oaks, California....       1         1990     81,158     100.0%      2,018       24.87
23600-23610 Telo Avenue
 Torrance, California(9)......       2         1984     79,967      80.4%        733        9.17
                                   ---               ---------                ------
Subtotal/Weighted Average--
 Los Angeles County...........      28               2,554,454      97.4%     51,396       20.12
                                   ---               ---------                ------
</TABLE>


                                      15
<PAGE>

<TABLE>
<CAPTION>
                                                                                          Average
                                            Year        Net     Percentage    Annual     Base Rent
                                 No. of    Built/    Rentable    Leased at   Base Rent  Per Sq. Ft.
      Property Location         Buildings Renovated Square Feet 12/31/99(1) ($000's)(2)   ($)(3)
      -----------------         --------- --------- ----------- ----------- ----------- -----------
<S>                             <C>       <C>       <C>         <C>         <C>         <C>
Orange County
Pacific Park Plaza
 Aliso Viejo, California(10)..       5         1992    134,667      91.8%     $1,857      $13.79
La Palma Business Center
 4175 E. La Palma Avenue
 Anaheim, California..........       1         1985     42,790      96.6%        766       17.89
8101 Kaiser Blvd.
 Anaheim, California..........       1         1988     60,177      92.2%      1,253       20.82
Anaheim Corporate Center
 Anaheim, California(11)......       4         1985    159,222      80.8%      1,700       10.68
1240 & 1250 Lakeview Avenue
 Anaheim, California..........       2         1987     78,903      94.7%        922       11.69
601 Valencia Avenue,
 Brea, California(7)..........       1         1982     60,891     100.0%        784       12.87
1501-1561 East Orangethorpe
 Avenue Fullerton,
 California(12)...............       4         1985    151,975      90.5%      1,489        9.79
111 Pacifica
 Irvine, California...........       1         1991     67,401      99.9%      1,913       28.39
9451 Toledo Way
 Irvine, California(13).......       1         1984     27,200       0.0%
2501 Pullman/1700 E. Carnegie
 Santa Ana, California(14)....       2    1969/1988    124,921      72.6%      1,448       11.60
                                   ---               ---------                ------
Subtotal/Weighted Average--
 Orange County................      22                 908,147      85.9%     12,132       13.36
                                   ---               ---------                ------

San Diego County
5770 Armada Drive
 Carlsbad, California(7)......       1         1998     81,712     100.0%      1,074       13.14
2231 Rutherford
 Carlsbad, California.........       1         1998     40,772      95.7%        592       14.52
6215/6220 Greenwich Drive
 San Diego, California(15)....       2         1996    212,214     100.0%      3,891       18.34
6055 Lusk Avenue
 San Diego, California(7).....       1         1997     93,000     100.0%      1,149       12.35
6260 Sequence Drive
 San Diego, California(7).....       1         1997    130,000     100.0%      1,192        9.17
6290 Sequence Drive
 San Diego, California(7).....       1         1997     90,000     100.0%        894        9.94
6340 & 6350 Sequence Drive
 San Diego, California(7).....       2         1998    200,000     100.0%      2,936       14.68
15378 Avenue of Science
 San Diego, California(7).....       1         1984     68,910     100.0%        631        9.16
Pacific Corporate Center
 San Diego, California(16)....       7         1995    411,402      96.0%      4,861       11.81
3990 Ruffin Road
 San Diego, California........       1         1998     45,634     100.0%        663       14.53
9455 Towne Center Drive
 San Diego, California(7).....       1         1998     45,195     100.0%        589       13.04
12225-12235 El Camino Real
 San Diego, California(17)....       2         1998    115,513     100.0%      2,368       20.50
4690 Executive Drive
 San Diego, California(7).....       1         1999     50,929     100.0%        955       18.76
12348 High Bluff Drive
 San Diego, California(18)....       1         1999     39,336     100.0%        997       25.33
9785/9791 Towne Center Drive
 San Diego, California(7).....       2         1999    126,000     100.0%      2,250       17.86
5005/5010 Wateridge Vista
 Drive
 San Diego, California(7).....       2         1999    172,778     100.0%      3,367       19.49
3579 Valley Center Drive
 San Diego, California(18)....       1         1999     52,375     100.0%      1,617       30.87
                                   ---               ---------                ------
Subtotal/Weighted Average--
 San Diego County.............      28               1,975,770      99.1%     30,026       15.20
                                   ---               ---------                ------
</TABLE>


                                       16
<PAGE>

<TABLE>
<CAPTION>
                                                                                        Average
                                          Year        Net     Percentage    Annual     Base Rent
                               No. of    Built/    Rentable    Leased at   Base Rent  Per Sq. Ft.
     Property Location        Buildings Renovated Square Feet 12/31/99(1) ($000's)(2)   ($)(3)
     -----------------        --------- --------- ----------- ----------- ----------- -----------
<S>                           <C>       <C>       <C>         <C>         <C>         <C>
Other
4351 Latham Avenue
 Riverside, California......       1         1990     21,356     100.0%    $    368     $17.22
4361 Latham Avenue
 Riverside, California(19)..       1         1992     30,842      92.5%         516      16.72
3750 University Avenue
 Riverside, California......       1         1982    124,986      96.1%       2,707      21.66
SeaTac Office Center
 18000 Pacific Highway......       1         1974    209,904     100.0%       3,194      15.22
 17930 Pacific Highway......       1    1980/1997    211,139     100.0%       2,172      10.29
 17900 Pacific Highway
 Seattle, Washington........       1         1980    111,387     100.0%       2,034      18.26
                                 ---               ---------               --------
Subtotal/Weighted Average--
 Other......................       6                 709,614      99.0%      10,991      15.49
                                 ---               ---------               --------
TOTAL/WEIGHTED AVERAGE
 OFFICE PROPERTIES..........      84               6,147,985      96.4%    $104,545     $17.00
                                 ---               ---------               --------

Industrial Properties:
Los Angeles County
Walnut Park Business Center
 Diamond Bar, California....       3         1987    165,420      97.4%       1,193       7.21
2031 E. Mariposa Avenue
 El Segundo, California.....       1         1954    192,053     100.0%       1,840       9.58
2260 E. El Segundo Blvd.
 El Segundo, California.....       1         1979    113,820     100.0%         555       4.87
2265 E. El Segundo Blvd.
 El Segundo, California.....       1         1978     76,570     100.0%         555       7.24
2270 E. El Segundo Blvd.
 El Segundo, California.....       1         1975      6,362     100.0%          88      13.80
                                 ---               ---------               --------
Subtotal/Weighted Average--
 Los Angeles County.........       7                 554,225      99.2%       4,231       7.63
                                 ---               ---------               --------

Orange County
3340 E. La Palma Avenue
 Anaheim, California........       1         1966    153,320     100.0%       1,064       6.94
1000 E. Ball Road
 Anaheim, California........       1         1956    100,000     100.0%         639       6.39
1230 S. Lewis Road
 Anaheim, California........       1         1982     57,730     100.0%         291       5.04
4155 E. La Palma Avenue
 Anaheim, California(20)....       1         1985     74,618     100.0%         861      11.53
4125 E. La Palma Avenue
 Anaheim, California(20)....       1         1985     69,472     100.0%         519       7.46
5325 East Hunter Avenue
 Anaheim, California........       1         1983    109,449     100.0%         606       5.54
3130-3150 Miraloma
 Anaheim, California........       1         1970    144,000     100.0%         687       4.77
3125 E. Coronado Street
 Anaheim, California........       1         1970    144,000     100.0%         774       5.37
5115 E. La Palma Avenue
 Anaheim, California........       1    1967/1999    286,139     100.0%       1,453       5.08
1250 N. Tustin Avenue
 Anaheim, California........       1         1984     84,185     100.0%         751       8.93
Anaheim Tech Center
 Anaheim, California........       5         1999    593,992     100.0%       3,391       5.71
3250 East Carpenter
 Anaheim, California........       1         1998     41,225     100.0%         242       5.88
Brea Industrial Complex
 Brea, California(21).......       7         1981    276,278      92.8%       1,605       5.81
Brea Industrial--Lambert
 Road Brea, California(20)..       2         1999    178,811     100.0%       1,190       6.66
1675 MacArthur
 Costa Mesa, California.....       1         1986     50,842     100.0%         512      10.07
</TABLE>

                                       17
<PAGE>

<TABLE>
<CAPTION>
                                                                                                 Average
                                                   Year        Net     Percentage    Annual     Base Rent
                                        No. of    Built/    Rentable    Leased at   Base Rent  Per Sq. Ft.
     Property Location                 Buildings Renovated Square Feet 12/31/99(1) ($000's)(2)   ($)(3)
     -----------------                 --------- --------- ----------- ----------- ----------- -----------
<S>                                    <C>       <C>       <C>         <C>         <C>         <C>
Dimension Business Park
 El Toro, California(22).........           2      1990        45,257     100.0%         494     $10.92
892/909 Towne Center Drive
 Foothill Ranch, California......           1      1998       303,327      58.9%       1,561       5.15
12681/12691 Pala Drive
 Garden Grove, California........           1      1970        84,700     100.0%         580       6.85
Garden Grove Industrial Complex
 Garden Grove, California(23)....           6      1971       275,971     100.0%       1,708       6.19
12752-12822 Monarch Street
 Garden Grove, California........           1      1970       277,037     100.0%       1,068       3.86
7421 Orangewood Avenue
 Garden Grove, California........           1      1981        82,602     100.0%         575       6.96
12400 Industry Street
 Garden Grove, California........           1      1972        64,200     100.0%         369       5.74
Giltspur Building
 Garden Grove, California........           1      1974       110,220     100.0%         777       7.05
17150 Von Karman
 Irvine, California..............           1      1977       157,458     100.0%       1,139       7.24
184-220 Technology Drive
 Irvine, California..............          10      1990       157,499      93.2%       1,719      10.92
9401 Toledo Way
 Irvine, California..............           1      1984       244,800     100.0%       1,355       5.53
2055 S.E. Main Street
 Irvine, California(24)..........           1      1973        47,583     100.0%         371       7.81
13645-13885 Alton Parkway
 Irvine, California(25)..........           9      1989       143,117      95.6%       1,203       8.41
1951 E. Carnegie
 Santa Ana, California...........           1      1981       100,000     100.0%         734       7.34
14831 Franklin Avenue
 Tustin, California(24)..........           1      1978        36,256     100.0%         226       6.25
2911 Dow Avenue
 Tustin, California..............           1      1998        54,720     100.0%         361       6.60
                                          ---              ----------               --------
Subtotal/Weighted Average--
 Orange County...................          65               4,548,808      96.4%      28,825       6.34
                                          ---              ----------               --------
San Diego County
5759 Fleet Street
 Carlsbad, California............           1      1998        82,923     100.0%       1,504      18.14
6828 Nancy Ridge Drive
 San Diego, California...........           1      1982        39,669     100.0%         385       9.70
41093 Country Center Drive
 San Diego, California...........           1      1997        77,582     100.0%         546       7.04
                                          ---              ----------               --------
Subtotal/Weighted Average--
 San Diego County................           3                 200,174     100.0%       2,435      12.17
                                          ---              ----------               --------
Other
1840 Aerojet Way
 Las Vegas, Nevada...............           1      1993       102,948     100.0%         514       4.91
1900 Aerojet Way
 Las Vegas, Nevada...............           1      1995       106,717     100.0%         505       4.82
795 Trademark Drive
 Reno, Nevada....................           1      1998        75,257     100.0%         809      10.75
5115 N. 27th Avenue
 Phoenix, Arizona(26)............           1      1962       130,877     100.0%         649       4.96
199/201 North Sunrise Avenue
 Roseville, California(27)(28)...           2      1981       162,203     100.0%       1,612       9.94
1961 Concourse Drive
 San Jose, California(28)........           1      1984       110,132      70.7%         837       7.60
1710 Fortune Drive
 San Jose, California(28)........           1      1983        86,000     100.0%       1,244      14.46
2010-2040 Fortune Drive
 San Jose, California(28)........           3      1998       235,251     100.0%       3,447      14.65
3735 Imperial Highway
 Stockton, California.......                1      1996       164,540     100.0%       1,180       7.17
                                          ---              ----------               --------
Subtotal/Weighted Average--
 Other......................               12               1,173,925      97.2%      10,797        9.2
                                          ---              ----------               --------
TOTAL/WEIGHTED AVERAGE
 INDUSTRIAL PROPERTIES...........          87               6,477,132      96.9%    $ 46,288     $ 7.15
                                          ---              ----------     -----     --------
TOTAL/WEIGHTED AVERAGE ALL
 PROPERTIES......................         171              12,625,117      96.7%    $150,833     $11.95
                                          ===              ==========     =====     ========
</TABLE>

                                              (footnotes continued on next page)

                                       18
<PAGE>

- --------
 (1) Based on all leases at the respective properties in effect as of December
     31, 1999.

 (2) Calculated as base rent for the year ended December 31, 1999, determined
     in accordance with generally accepted accounting principles ("GAAP"), and
     annualized to reflect a twelve-month period. Unless otherwise indicated,
     leases at the Industrial Properties are written on a triple net basis and
     leases at the Office Properties are written on a full service gross basis,
     with the landlord obligated to pay the tenant's proportionate share of
     taxes, insurance and operating expenses up to the amount incurred during
     the tenant's first year of occupancy ("Base Year") or a negotiated amount
     approximating the tenant's pro rata share of real estate taxes, insurance
     and operating expenses ("Expense Stop"). Each tenant pays its pro rata
     share of increases in expenses above the Base Year of Expense Stop.

 (3) Calculated as Annual Base Rent divided by net rentable square feet leased
     at December 31, 1999.

 (4) The four properties at 5151-5155 Camino Ruiz were built between 1982 and
     1985.

 (5) For this property, leases with Hughes Space and Communications for
     approximately 96,000 rentable square feet and SDRC Software Products
     Marketing Division, Inc. for approximately 6,800 rentable square feet are
     written on a full service gross basis, except that there is no Expense
     Stop.

 (6) For this property, the lease with Hughes Space and Communications is
     written on a modified full service gross basis under which Hughes Space
     and Communications pays for all utilities and other internal maintenance
     costs with respect to the leased space and, in addition, pays its pro rata
     share of real estate taxes, insurance, and certain other expenses
     including common area expenses.

 (7) For this property, the lease is written on a triple net basis.

 (8) For this property, leases with Hughes Space and Communications for
     approximately 103,000 rentable square feet are written on a full service
     gross basis, except that there is no Expense Stop.

 (9) For this property, a lease for approximately 41,000 rentable square feet
     is written on a modified gross basis, with the tenant paying its share of
     taxes and insurance above base year amounts. The leases for the remaining
     23,000 rentable square feet are written on a full service gross basis.

(10) For this property, leases for approximately 65,000 rentable square feet
     are written on a full service basis, with the tenants paying no expense
     reimbursement, leases for approximately 38,000 rentable square feet are
     written on a modified full service gross basis, and leases for
     approximately 29,000 rentable square feet are written on a triple net
     basis.

(11) For this property, leases for approximately 70,500 rentable square feet
     are written on a full service gross basis, with the tenants paying no
     expense reimbursement, leases for approximately 48,500 rentable square
     feet are written on a modified full service gross basis, and leases for
     approximately 21,000 rentable square feet are written on a triple net
     basis.

(12) For this property, a lease for approximately 21,000 rentable square feet
     is written on a modified full service gross basis, and leases for
     approximately 11,000 rentable square feet are written on a triple net
     basis.

(13) This property was 100% leased to one tenant in January 2000 with
     annualized base rent of $375,000.

(14) For this property, a lease for approximately 52,000 rentable square feet
     is written on a modified full service gross basis, and a lease for
     approximately 39,000 rentable square feet is written on a triple net
     basis.

(15) This property includes an expansion building with 71,000 rentable square
     feet developed by the Company in 1999.

(16) The leases for this property are written on a modified net basis, with the
     tenants responsible for their pro-rata share of common area expenses and
     real estate taxes.

(17) For this property, a lease for 60,840 rentable square feet is written on a
     triple net basis.

(18) For this property, the leases are written on a modified full service gross
     basis, with the tenants responsible for paying utilities directly.

(19) For this property, a lease for 15,728 rentable square feet is written on a
     triple net basis, and leases for 15,114 rentable square feet are written
     on a modified full service gross basis.

(20) The leases for these industrial properties are written on a modified
     triple net basis, with the tenants responsible for estimated allocated
     common area expenses.

(21) The seven properties at the Brea Industrial Complex were built between
     1981 and 1988.

(22) For this property, leases for approximately 26,000 rentable square feet
     are written on a full service basis, with the tenants paying no expense
     reimbursement, and leases for approximately 19,000 rentable square feet
     are written on a modified full service gross basis.

(23) The six properties at the Garden Grove Industrial Complex were built
     between 1971 and 1985.

                                              (footnotes continued on next page)

                                       19
<PAGE>

(24) For this property, the lease is written on a full service gross basis.

(25) For this property, leases for approximately 53,000 rentable square feet
     are written on a full service gross basis, with the tenants paying no
     expense reimbursement, leases for approximately 53,000 rentable square
     feet are written on a modified triple net basis with the tenants
     responsible for estimated allocated common area expenses.

(26) This industrial property was originally designed for multi-tenant use and
     currently is leased to a single tenant and utilized as an indoor multi-
     vendor retail marketplace.

(27) For this property, leases for approximately 115,500 rentable square feet
     are written on a triple net basis and, leases for approximately 46,500
     rentable square feet are written on a full service basis, with the
     tenants paying no expense reimbursement.

(28) This property was managed by third-party managers at December 31, 1999.

                                      20
<PAGE>

Development Projects

   The following table sets forth certain information relating to each of the
development projects that the Company had under construction at December 31,
1999. The Company owns a 100% interest in all of the development projects
other than Peregrine Systems Corporate Center--Buildings 2 and 5 in which the
Company owns a 50% managing interest through a Development LLC. The Company
did not have any projects in lease-up at December 31, 1999 since all of the
properties developed and completed by the Company during 1999 and 1998,
encompassing an aggregate of approximately 2.0 million rentable square feet,
stabilized during 1999. All of the development projects under construction at
December 31, 1999 were office projects.

<TABLE>
<CAPTION>
                                                           Projected         %
                             Estimated         Total       Square Feet  Committed at
                           Stabilization     Estimated        upon     December 31,
 Project Name/Submarket       Date(1)      Investment(2)   Completion     1999(3)
 ----------------------    -------------   -------------- ------------ -------------
                                           (in thousands)
<S>                       <C>              <C>            <C>          <C>
Development Projects in
 Lease-up:
None

Development Projects
 Under Construction:
Brobeck, Phleger and
 Harrison/San Diego.....  1st Quarter 2000    $ 15,548       72,300         100%
Calabasas Park Centre--
 Phase I/Los Angeles....  4th Quarter 2000      17,757      101,600          88%
Carmel Mountain
 Technology
 Center/San Diego.......  1st Quarter 2001      17,160      103,000         100%
Kilroy Airport Center,
 Long Beach--7 Story/Los
 Angeles................  3rd Quarter 2001      31,939      191,800          77%
Peregrine Systems
 Corporate Ctr.--
 Building 2/San
 Diego(4)...............  2nd Quarter 2000      26,334      129,700         100%
Peregrine Systems
 Corporate Ctr.--
 Building 5/San
 Diego(4)...............  3rd Quarter 2000      22,668      112,100         100%
Westside Media Center--
 Phase II/Los Angeles...  4th Quarter 2000      42,412      151,000         100%
                                              --------      -------
  Total Development
   Projects Under
   Construction.........                      $173,818      861,500          93%
                                              ========      =======
</TABLE>
- --------
(1) Based on management's estimation of the earlier of stabilized occupancy
    (95.0%) or one year from the date of substantial completion.

(2) Represents total projected development costs at December 31, 1999.

(3) Represents executed leases and signed letters of intent to lease
    calculated on a square footage basis at December 31, 1999.

(4) Represents projects being developed by the Development LLCs in conjunction
    with The Allen Group, a group of affiliated real estate and development
    companies based in Visalia, California. See separate discussion in Item 7:
    Management's Discussion and Analysis of Financial Condition and Results of
    Operations--Capital Expenditures Section for further discussion.

                                      21
<PAGE>

Tenant Information

   The following table sets forth information as to the Company's ten largest
office and industrial tenants based upon annualized rental revenues for the
year ended December 31, 1999.

<TABLE>
<CAPTION>
                                         Percentage of
                              Annual      Total Base                      Lease
                           Base Rental      Rental     Initial Lease   Expiration
      Tenant Name          Revenues(1)     Revenues       Date(2)         Date
      -----------         -------------- ------------- -------------   ----------
                          (in thousands)
<S>                       <C>            <C>           <C>            <C>
Office Properties:
Hughes Aircraft
 Corporation's Space and
 Communications
 Company(3),(4).........     $ 9,630          6.4%        August 1984       Various
The Boeing
 Company(3),(5).........       5,742          3.8       February 1992       Various
Epson America, Inc.(6)..       4,211          2.8        October 1999       Various
Epicor Software
 Corporation............       3,016          2.0      September 1999   August 2009
Intuit, Inc. ...........       2,937          2.0       November 1997     June 2004
Sony Music
 Entertainment, Inc. ...       2,791          1.9           June 1997 December 2008
Unisys Corporation......       2,678          1.8          March 1997    April 2001
LPL Holdings............       2,247          1.5        October 1998 February 2014
Northwest Airlines,
 Inc.(7)................       2,236          1.5         August 1978       Various
Pacific Bell............       1,994          1.3       December 1998 February 2009
                             -------         ----
  Total Office
   Properties...........     $37,482         25.0%
                             =======         ====
Industrial Properties:
Mattel, Inc. ...........     $ 1,840          1.2%           May 1990  October 2000
Celestica California,
 Inc. ..................       1,561          1.0            May 1998      May 2008
Natural Alternatives
 Intl., Inc. ...........       1,504          1.0        October 1998  October 2013
OmniPak.................       1,453          1.0         August 1998     July 2008
Mazda Motor of America,
 Inc....................       1,355          0.9           July 1997     July 2000
Flextronics Intl USA,
 Inc. ..................       1,244          0.8      September 1999   August 2006
Kraft Foods, Inc. ......       1,180          0.8       February 1996 February 2006
Packard Hughes
 Interconnect...........       1,094          0.7            May 1997  January 2001
Targus, Inc. ...........       1,043          0.7       December 1998    March 2009
Southern Plastic
 Mold(8)................         952          0.6         August 1992       Various
                             -------         ----
  Total Industrial
   Properties...........     $13,226          8.7%
                             =======         ====
</TABLE>
- --------
(1) Determined in accordance with generally accepted accounting principles.

(2) Represents date of first relationship between tenant and the Company or
    the Company's predecessor, the Kilroy Group.

(3) In January 2000, The Boeing Company announced the pending acquisition of
    Hughes' Space and Communications business and related operations (not
    including DirecTV). While the transaction has not yet closed, the combined
    entity would have accounted for 10.1% of the Company's total base rental
    revenues for the year ended December 31, 1999, and total combined net
    rentable square feet of 841,580 at December 31, 1999.

(4) Hughes Space and Communications leases of 286,151 and 100,978 net rentable
    square feet expire July 2004 and January 2004, respectively. Leases with
    other Hughes-affiliated entities of 7,515, 5,388 and 5,234 net rentable
    square feet expire November 2001, December 2001 and December 2001,
    respectively.

(5) The Boeing Company leases of 211,139, 49,988, 26,620, 24,356, 14,777, and
    6,814 net rentable square feet expire December 2004, January 2002,
    December 2000, December 2000, June 2000, and January 2001, respectively.
    Boeing North America lease of 113,242 net rentable square feet expires May
    2009.

(6) Epson America, Inc. and Epson Seiko leases of 123,737, 26,832 and 3,562
    net rentable square feet expire October 2009, October 2009 and October
    2002, respectively.

(7) Northwest Airlines leases of 60,000 and 27,861 net rentable square feet
    expire in February 2001 and April 2005, respectively.

(8) Southern Plastic Mold leases of 144,000 and 44,000 rentable square feet
    expire September 2003 and February 2005, respectively.


                                      22
<PAGE>

   At December 31, 1999, the Company's tenant base was comprised of the
following industries, broken down by percentage of total portfolio base rent:
manufacturing, 41.9%; services, 23.7%; transportation, communications and
public utilities, 12.9%; finance, insurance and real estate, 10.5%; retail
trade, 4.2%; wholesale trade, 3.2%; government, 2.3%; construction, 1.1%; and
agriculture, forestry and fishing, 0.2%. Following is a list comprised of a
representative sample of 25 of the Company's tenants whose annual base rental
revenues were less than 1.0% of the Company's total annual base revenue at
December 31, 1999:

<TABLE>
 <C>                                <C>                                <S>
 ACG Green Group, Inc.              Hanger Orthopedic Group            Premier, Inc.
 Advanced Tool Systems              LEA Corporation                    QSC Audio Products, Inc.
 Affiliated Computer Services, Inc. Medibuy.com, Inc.                  Raab Karcher Electronics
 Alesis Studio Electronics, Inc.    MRJ Industries, Inc.               Rayonier, Inc.
 AMN Healthcare, Inc.               National Digital Television Center Ricoh Electronics, Inc.
 Applied Micro Circuits Corp.       Otis Elevator Company              Rosemount Analytical, Inc.
 Calbiochem                         Pacific Parking System, Inc.       Troika Network, Inc.
 Celebrity Prime Foods              Pepperdine University              Webhouse, Inc.
 Dovatron Manufacturing S. Calif
</TABLE>

Lease Expirations

   The following table sets forth a summary of the Company's lease expirations
for the Office and Industrial Properties for each of the ten years beginning
with 2000, assuming that none of the tenants exercise renewal options or
termination rights.

<TABLE>
<CAPTION>
                                                 Percentage of             Average Annual
                                    Net Rentable Total Leased  Annual Base  Rent Per Net
                                    Area Subject  Square Feet  Rent Under  Rentable Square
                          Number of to Expiring   Represented   Expiring        Foot
                          Expiring     Leases     by Expiring    Leases    Represented by
Year of Lease Expiration  Leases(1)  (Sq. Ft.)     Leases(2)   (000's)(3)  Expiring Leases
- ------------------------  --------- ------------ ------------- ----------- ---------------
<S>                       <C>       <C>          <C>           <C>         <C>
Office Properties:
2000....................      89        379,552        6.2%     $  7,050       $18.57
2001....................      84      1,075,655       17.6        16,454        15.30
2002....................      66        571,575        9.4         8,882        15.54
2003....................      39        228,146        3.7         4,339        19.02
2004....................      51        826,376       13.5        18,697        22.63
2005....................      22        704,601       11.6        10,064        14.28
2006....................      13        369,133        6.1         6,994        18.95
2007....................      10        511,571        8.4         8,948        17.49
2008....................       8        315,214        5.2         6,277        19.91
2009 and beyond.........      16      1,117,962       18.3        28,989        25.93
                             ---     ----------      -----      --------
                             398      6,099,785      100.0%     $116,694       $19.13
                             ---     ----------                 --------
Industrial Properties:
2000....................      75        980,430       16.2%     $  7,432       $ 7.58
2001....................      64        651,980       10.8         4,778         7.33
2002....................      37        222,065        3.7         2,190         9.86
2003....................      28        754,993       12.5         5,763         7.63
2004....................      17        591,256        9.8         4,506         7.62
2005....................       9        420,618        7.0         2,908         6.91
2006....................       9        693,936       11.5         5,984         8.62
2007....................       3        164,595        2.7         1,396         8.48
2008....................       7        859,786       14.2         6,680         7.77
2009 and beyond.........      12        707,345       11.6         5,547         7.84
                             ---     ----------      -----      --------
                             261      6,047,004      100.0%     $ 47,184       $ 7.80
                             ---     ----------                 --------
Total Portfolio.........     659     12,146,789      100.0%     $163,878       $13.49
                             ===     ==========                 ========
</TABLE>
                                                       (footnotes on next page)

                                      23
<PAGE>

- --------
(1) Includes tenants only. Excludes leases for amenity, retail, parking and
    month-to-month tenants. Some tenants have multiple leases.

(2) Based on total leased square footage for the respective portfolios as of
    December 31, 1999 unless a lease for a replacement tenant had been
    executed on or before January 1, 2000.

(3) Determined based upon aggregate base rent to be received over the term
    divided by the term in months multiplied by 12, including all leases
    executed on or before January 1, 2000.

Mortgage Debt

   At December 31, 1999, the Operating Partnership had seven mortgage loans
outstanding, representing aggregate indebtedness of approximately $326
million, which were secured by certain of the Office and Industrial Properties
(the "Secured Obligations"). See "Management's Discussion and Analysis of
Financial Condition and Results of Operations--Liquidity and Capital
Resources" and Note 6 to the Company's consolidated and combined financial
statements included herewith. Management believes that as of December 31,
1999, the value of the properties securing the respective Secured Obligations
in each case exceeded the principal amount of the outstanding obligation.

ITEM 3. LEGAL PROCEEDINGS

   Neither the Company nor any of the Company's properties are presently
subject to any material litigation nor, to the Company's knowledge, is any
material litigation threatened against any of them which if determined
unfavorably to the Company would have a material adverse effect on the
Company's cash flows, financial condition or results of operations. The
Company is party to litigation arising in the ordinary course of business,
none of which if determined unfavorably to the Company is expected to have a
material adverse effect on the Company's cash flows, financial condition or
results of operations.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

   No matters were submitted to a vote of stockholders during the fourth
quarter of the year ended December 31, 1999.

                                      24
<PAGE>

                                    PART II

ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

   The Company's common stock began trading on the New York Stock Exchange
("NYSE") on January 28, 1997, under the symbol "KRC." The following table
illustrates the high, low and closing prices by quarter during 1999 and 1998
as reported on the NYSE. On March 10, 2000, there were approximately 230
registered holders of the Company's common stock.

<TABLE>
<CAPTION>
                                                                        Common
                                                                         Stock
                                                                       Dividends
1999                                               High   Low   Close  Declared
- ----                                              ------ ------ ------ ---------
<S>                                               <C>    <C>    <C>    <C>
First quarter.................................... $23.38 $19.94 $20.50  $0.4200
Second quarter...................................  26.19  19.69  24.38   0.4200
Third quarter....................................  24.31  20.31  21.13   0.4200
Fourth quarter...................................  22.38  18.00  22.38   0.4200
</TABLE>

<TABLE>
<CAPTION>
                                                                        Common
                                                                         Stock
                                                                       Dividends
1998                                               High   Low   Close  Declared
- ----                                              ------ ------ ------ ---------
<S>                                               <C>    <C>    <C>    <C>
First quarter.................................... $29.25 $26.31 $28.56  $0.4050
Second quarter...................................  28.31  24.69  25.00   0.4050
Third quarter....................................  25.56  19.00  23.00   0.4050
Fourth quarter...................................  23.38  19.50  23.00   0.4050
</TABLE>

   The Company pays distributions to common stockholders on or about the 10th
day of each January, April, July and October at the discretion of the Board of
Directors. Distribution amounts depend on the Company's Funds from Operations,
financial condition and capital requirements, the annual distribution
requirements under the REIT provisions of the Internal Revenue Code of 1986,
as amended (the "Code"), and such other factors as the Board of Directors
deems relevant.

   During fiscal year 1999, the Operating Partnership issued 472,034 common
units of the Operating Partnership, valued by the Company at approximately
$9.9 million based upon the closing share price of the Company's common stock
as reported on the NYSE at the time of the respective transactions, to
entities controlled by Richard S. Allen, a former member of the Company's
Board of Directors, in partial consideration for the contribution of certain
properties and undeveloped land to the Operating Partnership. A former
Executive Vice President of the Company received 245,066 of the total 472,034
common units. The common units become convertible into shares of the Company's
common stock, on a one-for-one basis, one year after issuance date. The common
units were issued in reliance upon an exemption from registration provided by
Regulation D under the Securities Act as a transaction by an issuer not
involving a public offering.

   During the fourth quarter of fiscal year 1999, the Company issued 900,000
9.250% Series D Cumulative Redeemable Preferred units, representing limited
partnership interests in the Operating Partnership with a liquidation value of
$50.00 per unit, in exchange for a gross contribution to the Operating
Partnership of $45.0 million. The Series D Preferred units are exchangeable,
at the option of the majority of the holders, for shares of the Company's
9.250% Series D Cumulative Redeemable Preferred stock, beginning ten years
from the date of issuance, or earlier under certain circumstances. The Series
D Cumulative Redeemable Preferred units were issued in reliance upon an
exemption from registration provided by Regulation D under the Securities Act
as a transaction by an issuer not involving a public offering.

   During 1999, the Company issued 442,200 shares of common stock upon the
conversion of 442,200 common units of the Operating Partnership by limited
partners. The issuance of the common shares on a one-for-one basis was made
pursuant to the terms set forth in the partnership agreement of the Operating
Partnership. The shares of common stock were issued in a transaction not
requiring registration under federal securities laws pursuant to Section 4(2)
of the Securities Act of 1933.

                                      25
<PAGE>

ITEM 6. SELECTED FINANCIAL DATA

                 Kilroy Realty Corporation and the Kilroy Group
      (in thousands, except per share, square footage and occupancy data)

<TABLE>
<CAPTION>
                          Kilroy Realty Corporation Consolidated         Kilroy Group Combined
                          -------------------------------------- -------------------------------------
                                                    February 1,  January 1,
                           Year Ended   Year Ended    1997 to      1997 to    Year Ended   Year Ended
                          December 31, December 31, December 31, January 31, December 31, December 31,
                              1999         1998         1997        1997         1996         1995
                          ------------ ------------ ------------ ----------- ------------ ------------
<S>                       <C>          <C>          <C>          <C>         <C>          <C>
Statements of Operations
 Data:
 Rental income..........    $140,182     $117,338     $56,069      $2,760      $35,022      $33,896
 Tenant
  reimbursements........      16,316       14,956       6,751         306        3,752        3,002
 Development services...                                               14          698        1,156
 Sale of air rights.....                                                                      4,456
 Interest income........       1,175        1,698       3,571
 Other income...........       2,027        3,096         889           4           76          398
                            --------     --------     -------      ------      -------      -------
   Total revenues.......     159,700      137,088      67,280       3,084       39,548       42,908
                            --------     --------     -------      ------      -------      -------

 Property expenses......      20,669       19,281       8,770         579        6,788        6,834
 Real estate taxes......      12,369       10,383       4,199         137        1,673        1,416
 General and
  administrative
  expenses..............       9,091        7,739       4,949          78        2,383        2,152
 Ground leases..........       1,397        1,223         938          64          768          789
 Provision for
  potentially
  unrecoverable pre-
  development costs.....                    1,700
 Development expenses...                                               46          650          737
 Option buy-out cost ...                                                         3,150
 Interest expense.......      26,309       20,568       9,738       1,895       21,853       24,159
 Depreciation and
  amortization..........      33,794       26,200      13,236         787        9,111        9,474
                            --------     --------     -------      ------      -------      -------
   Total expenses.......     103,629       87,094      41,830       3,586       46,376       45,561
                            --------     --------     -------      ------      -------      -------
 Income (loss) before
  gains on dispositions
  of operating
  properties, equity in
  income of
  unconsolidated
  subsidiary, minority
  interests and
  extraordinary gains...      56,071       49,994      25,450        (502)      (6,828)      (2,653)
 Gains on dispositions
  of operating
  properties............          46
 Equity in income of
  unconsolidated
  subsidiary............          17            5          23
                            --------     --------     -------      ------      -------      -------
 Income (loss) before
  minority interests
  and extraordinary
  gains.................      56,134       49,999      25,473        (502)      (6,828)      (2,653)
 Minority interests:
   Distributions on
    Cumulative
    Redeemable Preferred
    units...............      (9,560)      (5,556)
   Minority interest in
    earnings of
    Operating
    Partnership.........      (6,480)      (5,621)     (3,413)
   Minority interest in
    earnings of
    Development LLCs....        (199)
                            --------     --------     -------      ------      -------      -------
 Total minority
  interests.............     (16,239)     (11,177)     (3,413)
                            --------     --------     -------
 Income (loss) before
  extraordinary gains...      39,895       38,822      22,060        (502)      (6,828)      (2,653)
 Extraordinary gains--
  extinguishment of
  debt..................                                            3,204       20,095       15,267
                            --------     --------     -------      ------      -------      -------
   Net income...........    $ 39,895     $ 38,822     $22,060      $2,702      $13,267      $12,614
                            ========     ========     =======      ======      =======      =======
Share Data:
 Weighted average
  shares outstanding--
  basic.................      27,701       26,989      18,445
                            ========     ========     =======
 Weighted average
  shares outstanding--
  diluted...............      27,727       27,060      18,539
                            ========     ========     =======
 Net income per common
  share--basic..........    $   1.44     $   1.44     $  1.20
                            ========     ========     =======
 Net income per common
  share--diluted........    $   1.44     $   1.43     $  1.19
                            ========     ========     =======
 Distributions per
  common share..........    $   1.68     $   1.62     $  1.42
                            ========     ========     =======
</TABLE>


                                       26
<PAGE>

<TABLE>
<CAPTION>
                                            December 31,
                         -----------------------------------------------------------
                            Kilroy Realty Corporation             Kilroy Group
                                  Consolidated                      Combined
                         -----------------------------------   ---------------------
                            1999         1998        1997        1996        1995
                         ----------   ----------   ---------   ---------   ---------
<S>                      <C>          <C>          <C>         <C>         <C>
Balance Sheet Data:
 Investment in real
  estate, before
  accumulated
  depreciation and
  amortization.......... $1,410,238   $1,194,284   $ 834,690   $ 227,337   $ 224,983
 Total assets...........  1,320,501    1,109,217     757,654     128,339     132,857
 Mortgage debt and
  unsecured line of
  credit................    553,516      405,383     273,363     223,297     233,857
 Total liabilities......    613,519      452,818     305,319     242,116     254,683
 Total minority
  interests.............    234,053      180,500      55,185
 Total stockholders'
  equity/(accumulated
  deficit)..............    472,929      475,899     397,150    (113,777)   (121,826)

Other Data:
 Funds From
  Operations(1),(2)..... $   80,631   $   71,174   $  39,142   $   5,433   $   2,365

 Cash flows from(3):
   Operating
    activities..........     84,635       73,429      28,928       5,520      10,071
   Investing
    activities..........   (192,795)    (343,717)   (551,956)     (2,354)     (1,162)
   Financing
    activities..........    127,833      267,802     531,957      (3,166)     (8,909)

 Office Properties:
   Rentable square
    footage.............  6,147,985    5,600,459   4,200,734   1,688,383   1,688,383
   Occupancy............       96.4 %       95.7 %      94.3 %      76.0 %      72.8 %

 Industrial Properties:
   Rentable square
    footage.............  6,477,132    6,157,107   5,027,716     916,570     916,570
   Occupancy............       96.9 %       96.0 %      91.9 %      97.6 %      98.4 %
</TABLE>
- --------
(1) As defined by the National Association of Real Estate Investment Trusts
    ("NAREIT"), "Funds From Operations" represents net income (loss) before
    minority interest of common unitholders (computed in accordance with
    GAAP), excluding gains (or losses) from debt restructuring and sales of
    property, plus real estate related depreciation and amortization
    (excluding amortization of deferred financing costs and depreciation of
    non-real estate assets) and after adjustments for unconsolidated
    partnerships and joint ventures. Non-cash adjustments to arrive at Funds
    From Operations were as follows: in all periods, depreciation and
    amortization; in 1996, 1995 and 1994 gains on extinguishment of debt; and
    in 1999, 1998 and 1997 non-cash compensation. Further, in 1996 and 1995,
    non-recurring items (sale of air rights and option buy-out cost) were
    excluded. Management considers Funds From Operations an appropriate
    measure of performance of an equity REIT because it is predicated on cash
    flow analyses. The Company computes Funds From Operations in accordance
    with standards established by the Board of Governors of NAREIT in its
    March 1995 White Paper, which may differ from the methodology for
    calculating Funds From Operations utilized by other equity REITs and,
    accordingly, may not be comparable to Funds From Operations reported by
    such other REITs. Further, Funds From Operations does not represent
    amounts available for management's discretionary use because of needed
    capital reinvestment or expansion, debt service obligations, or other
    commitments and uncertainties. See the notes to the financial statements
    of the Company and the Kilroy Group. Funds From Operations should not be
    considered as an alternative to net income (loss) (computed in accordance
    with GAAP) as an indicator of the properties' financial performance or to
    cash flow from operating activities (computed in accordance with GAAP) as
    a measure or indicator of the properties' liquidity, nor is it indicative
    of funds available to fund the properties' cash needs, including the
    Company's ability to pay dividends or make distributions.

(2) Funds From Operations for 1997 is derived from the results of operations
    of Kilroy Realty Corporation for the period February 1, 1997 to December
    31, 1997.

(3) Cash flow for 1997 represents the cash flow of the Kilroy Group for the
    period January 1, 1997 to January 31, 1997 and Kilroy Realty Corporation
    for the period February 1, 1997 to December 31, 1997.

                                      27
<PAGE>

ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
        RESULTS OF OPERATIONS

   The following discussion relates to the consolidated financial statements
of the Company and should be read in conjunction with the financial statements
and related notes thereto. Statements contained in this "Management's
Discussion and Analysis of Financial Condition and Results of Operations" that
are not historical facts may be forward-looking statements. Such statements
are subject to certain risks and uncertainties, which could cause actual
results to differ materially from those projected. You are cautioned not to
place undue reliance on these forward-looking statements.

Overview and Background

   The Company, which develops, owns, and operates office and industrial real
estate, primarily in Southern California, commenced operations upon the
completion of its initial public offering in January 1997 and operates as a
self-administered REIT. The Company owns its interests in all of its
properties through the Operating Partnership and the Finance Partnership and
conducts substantially all of its operations through the Operating
Partnership. The Company owned an 86.8% general partnership interest in the
Operating Partnership as of December 31, 1999 and 1998.

   The Company's revenue is derived primarily from rental income, including
tenant reimbursements. The Company's revenue growth in 1999 was due primarily
to a full year of operating results from $254 million in acquisitions
completed in 1998 and operating results from $171 million of development
projects completed by the Company in 1998 and 1999. While a significant
portion of the Company's revenue growth in 1999 and most of the Company's
revenue growth in 1998 and 1997 was due to the acquisition of $792 million of
properties in aggregate during the three-year period, the market for property
acquisitions continues to be competitive. As a result, management believes
that the most significant part of the Company's revenue growth over the next
two to three years will come from its substantial development pipeline of over
2.8 million rentable square feet of office space. Management also believes
that continued improvement of the real estate market in the Company's
principal markets and the continued economic expansion of Southern California
will result in strong demand for office and industrial space. Consequently,
management currently expects that the Company's revenue in the next one to two
years will also grow as a result of re-leasing, at higher lease rates,
approximately 1.5 million square feet of office space and 1.6 million square
feet of industrial space currently subject to leases expiring during the next
two years. In addition, the Company intends to continue its leadership as a
low cost operator through integrated operations and disciplined cost
management.

Results of Operations

   During the year ended December 31, 1999, the Company acquired three office
buildings encompassing 176,900 aggregate rentable square feet for an aggregate
acquisition cost of $30.6 million and disposed of five office and five
industrial buildings encompassing 113,700 and 335,800 aggregate rentable
square feet, respectively, for an aggregate sales price of $22.6 million.
During the year ended December 31, 1998, the Company acquired 25 office and 16
industrial buildings encompassing 1.4 million and 674,000 aggregate rentable
square feet, respectively, for an aggregate acquisition cost of $254 million.
Operating results for acquired properties are included in the consolidated
financial statements of the Company subsequent to their respective acquisition
dates.

   During the year ended December 31, 1999, the Company completed the
development of six office and four industrial buildings encompassing an
aggregate of 472,200 and 390,200 rentable square feet, respectively. During
the year ended December 31, 1998, the Company completed the development of one
office and six industrial buildings encompassing an aggregate of 78,000 and
1.0 million rentable square feet, respectively. All of the aforementioned
development projects completed by the Company during 1999 and 1998 were
included in the Company's portfolio of stabilized operating properties at
December 31, 1999. The Company's stabilized portfolio consists of all of the
Company's Office and Industrial Properties, excluding properties recently
developed by the

                                      28
<PAGE>

Company that have not yet reached 95.0% occupancy ("lease-up" properties) and
projects currently under construction or in pre-development. The Company did
not have any lease-up properties at December 31, 1999 since all of the
development projects completed during 1998 and 1999 stabilized during 1999. At
December 31, 1999, the Company had seven office buildings under construction
which when completed are expected to encompass an aggregate of approximately
861,500 rentable square feet.

   As a result of the properties acquired and developed by the Company
subsequent to December 31, 1998, net of the effect of properties disposed of
during 1999, rentable square footage in the Company's portfolio of stabilized
operating properties increased approximately 868,000 rentable square feet, or
7.4%, to 12.6 million rentable square feet at December 31, 1999 compared to
11.8 million rentable square feet at December 31, 1998. As of December 31,
1999, the Company's portfolio of stabilized operating properties was comprised
of 84 Office Properties encompassing 6.1 million rentable square feet and 87
Industrial Properties encompassing 6.5 million rentable square feet. The
stabilized portfolio occupancy rate at December 31, 1999 was 96.7%, with the
Office and Industrial Properties 96.4% and 96.9% occupied, respectively, as of
such date.

 Year Ended December 31, 1999 Compared to Year Ended December 31, 1998

<TABLE>
<CAPTION>
                                             Year ended
                                            December 31,
                                          ----------------- Dollar   Percentage
                                            1999     1998   Change     Change
                                          -------- -------- -------  ----------
                                                 (dollars in thousands)
<S>                                       <C>      <C>      <C>      <C>
Revenues:
  Rental income.......................... $140,182 $117,338 $22,844      19.5 %
  Tenant reimbursements..................   16,316   14,956   1,360       9.1
  Interest income........................    1,175    1,698    (523)    (30.8)
  Other income...........................    2,027    3,096  (1,069)    (34.5)
                                          -------- -------- -------
    Total revenues.......................  159,700  137,088  22,612      16.5
                                          -------- -------- -------
Expenses:
  Property expenses......................   20,669   19,281   1,388       7.2
  Real estate taxes......................   12,369   10,383   1,986      19.1
  General and administrative expenses....    9,091    7,739   1,352      17.5
  Ground leases..........................    1,397    1,223     174      14.2
  Provision for potentially unrecoverable
   pre-development costs.................             1,700  (1,700)   (100.0)
  Interest expense.......................   26,309   20,568   5,741      27.9
  Depreciation and amortization..........   33,794   26,200   7,594      29.0
                                          -------- -------- -------
    Total expenses.......................  103,629   87,094  16,535      19.0
                                          -------- -------- -------
Income before gains on dispositions of
 operating properties, equity in income
 of unconsolidated subsidiary, and
 minority interests...................... $ 56,071 $ 49,994 $ 6,077      12.2 %
                                          ======== ======== =======
</TABLE>

                                      29
<PAGE>

Rental Operations

   Management evaluates the operations of its portfolio based on operating
property segment type. The following tables compare the net operating income,
defined as operating revenues less property and related expenses (property
expenses, real estate taxes and ground leases) before depreciation, for the
Office and Industrial Properties for the years ended December 31, 1999 and
1998.

<TABLE>
<CAPTION>
                                               Year ended
                                              December 31,
                                             --------------- Dollar   Percentage
                                              1999    1998   Change     Change
                                             ------- ------- -------  ----------
                                                   (dollars in thousands)
<S>                                          <C>     <C>     <C>      <C>
Office Properties
Operating revenues:
  Rental income............................. $96,527 $82,164 $14,363     17.5 %
  Tenant reimbursements.....................  10,966  10,957       9      0.1
  Other income..............................   1,779   2,956  (1,177)   (39.8)
                                             ------- ------- -------
    Total................................... 109,272  96,077  13,195     13.7
                                             ------- ------- -------
Property and related expenses:
  Property expenses.........................  17,553  16,373   1,180      7.2
  Real estate taxes.........................   7,589   6,567   1,022     15.6
  Ground leases.............................   1,397   1,223     174     14.2
                                             ------- ------- -------
    Total...................................  26,539  24,163   2,376      9.8
                                             ------- ------- -------
Net operating income, as defined............ $82,733 $71,914 $10,819     15.0 %
                                             ======= ======= =======
</TABLE>

   Total revenues from Office Properties increased $13.2 million, or 13.7% to
$109.3 million for the year ended December 31, 1999 compared to $96.1 million
for the year ended December 31, 1998. Rental income from Office Properties
increased $14.4 million, or 17.5% to $96.5 million for the year ended December
31, 1999 compared to $82.1 million for the year ended December 31, 1998. Of
this increase, $7.2 million was generated by office buildings acquired during
1998 and 1999, net of the effect of five office properties disposed of during
1999, (the "Net Office Acquisitions") and $5.5 million was generated by the
office buildings developed by the Company in 1998 and 1999 (the "Office
Development Properties"). The remaining $1.7 million of the increase was
generated by the stabilized office properties owned at January 1, 1998 and
still owned at December 31, 1999 (the "Core Office Properties"), and
represented a 3.4% increase in rental income for the Core Office Properties.
This increase was primarily attributable to increases in rental rates. Average
occupancy for the Core Office Properties decreased 0.8%, to 93.4% at December
31, 1999 from 94.2% at December 31, 1998.

   Tenant reimbursements from Office Properties remained consistent for the
years ended December 31, 1999 and 1998. An increase of $0.7 million in tenant
reimbursements generated by the Net Office Acquisitions and Office Development
Properties was offset by a decrease of $0.7 million in tenant reimbursements
generated by the Core Office Properties. This decrease in tenant
reimbursements for the Core Office Properties is due in part to the decrease
in average occupancy in this portfolio, and also to the decrease in property
expenses for this portfolio of properties as discussed below. Other income
from Office Properties decreased $1.2 million, or 39.8% to $1.8 million for
the year ended December 31, 1999 compared to $3.0 million for the same period
in 1998. For the year ended December 31, 1999, other income from Office
Properties included $0.5 million in gains from the sale of 13 acres of
undeveloped land in Calabasas and San Diego, California and $0.8 million in
lease termination fees from Core Office Portfolio properties. Other income
from Office Properties for the year ended December 31, 1998 included a $1.9
million net lease termination fee from an office property in San Diego,
California and $0.5 million in lease termination fees at various properties.
In addition, in 1998 the Company earned a $0.5 million consulting fee for
assisting an existing tenant with potential expansion plans. The remaining
amounts in other income from Office Properties for both periods consisted
primarily of management fees and tenant late charges.

                                      30
<PAGE>

   Total expenses from Office Properties increased $2.4 million, or 9.8% to
$26.5 million for the year ended December 31, 1999 compared to $24.1 million
for the year ended December 31, 1998. Property expenses increased $1.2
million, or 7.2% to $17.6 million for the year ended December 31, 1999
compared to $16.4 million for the year ended December 31, 1998. An increase of
$1.6 million in property expenses attributable to the Net Office Acquisitions
and the Office Development Properties was offset by a $0.4 million decrease in
property expenses at the Core Office Properties. This decrease was primarily
attributable to renegotiated property insurance premiums and a decrease in
electricity expense resulting from the implementation of energy management
systems in several of the buildings. Real estate taxes increased $1.0 million,
or 15.6% to $7.6 million for the year ended December 31, 1999 compared to $6.6
million for the year ended December 31, 1998. An increase of $1.1 million
attributable to the Net Office Acquisitions and the Office Development
Properties was offset by a decrease of $0.1 million for the Core Office
Properties. This decrease at the Core Office Properties was due primarily to
the effects of prior year property taxes which were successfully appealed and
refunded to the Company in 1999. Ground lease expense increased $0.2 million
for the year ended December 31, 1999 compared to the same period in 1998
primarily due to a full year of ground lease expense at one of the 1998 office
acquisition properties.

   Net operating income, as defined, from Office Properties increased $10.8
million, or 15.0% to $82.7 million for the year ended December 31, 1999
compared to $71.9 million for the year ended December 31, 1998. Of this
increase, $8.8 million was generated by the Net Office Acquisitions and the
Office Development Properties. The remaining increase of $2.0 million was
generated by the Core Office Properties and represented a 3.7% increase in net
operating income for the Core Office Properties.

<TABLE>
<CAPTION>
                                                 Year ended
                                                December 31,
                                               --------------- Dollar Percentage
                                                1999    1998   Change   Change
                                               ------- ------- ------ ----------
                                                    (dollars in thousands)
<S>                                            <C>     <C>     <C>    <C>
Industrial Properties
Operating revenues:
  Rental income............................... $43,655 $35,174 $8,481    24.1%
  Tenant reimbursements.......................   5,350   3,999  1,351    33.8
  Other income................................     248     140    108    77.1
                                               ------- ------- ------
    Total.....................................  49,253  39,313  9,940    25.3
                                               ------- ------- ------
Property and related expenses:
  Property expenses...........................   3,116   2,908    208     7.2
  Real estate taxes...........................   4,780   3,816    964    25.3
                                               ------- ------- ------
    Total.....................................   7,896   6,724  1,172    17.4
                                               ------- ------- ------
Net operating income, as defined.............. $41,357 $32,589 $8,768    26.9%
                                               ======= ======= ======
</TABLE>

   Total revenues from Industrial Properties increased $9.9 million, or 25.3%
to $49.2 million for the year ended December 31, 1999 compared to $39.3
million for the year ended December 31, 1998. Rental income from Industrial
Properties increased $8.5 million, or 24.1% to $43.7 million for the year
ended December 31, 1999 compared to $35.2 million for the year ended December
31, 1998. Of this increase, $3.4 million was generated by the industrial
buildings acquired during 1998 and 1999, net of the effect of the five
industrial buildings disposed of during 1999 (the "Net Industrial
Acquisitions") and $4.6 million was generated by the industrial buildings
developed by the Company in 1998 and 1999 (the "Industrial Development
Properties"). The remaining $0.5 million of the increase was generated by the
stabilized industrial buildings owned at January 1, 1998 and still owned at
December 31, 1999 (the "Core Industrial Properties"), and represented a 1.8%
increase in rental income for the Core Industrial Properties. This increase
was attributable to both an increase in average occupancy of 0.6% and an
increase in rental rates of 1.0% for this portfolio.

                                      31
<PAGE>

   Tenant reimbursements from Industrial Properties increased $1.4 million, or
33.8% to $5.4 million for the year ended December 31, 1999 compared to $4.0
million for year ended December 31, 1998. Of this increase, $1.1 million was
attributable to the Net Industrial Acquisitions and the Industrial Development
Properties. The remaining $0.3 million was attributable to the Core Industrial
Properties and was primarily due to an increase in real estate taxes
reimbursable by tenants. Other income from Industrial Properties increased
$0.1 million, or 77.1% to $0.2 million for the year ended December 31, 1999
compared to $0.1 million for the comparable period in 1998. Other income for
the years ended December 31, 1999 and 1998 consisted primarily of lease
termination fees.

   Total expenses from Industrial Properties increased $1.2 million, or 17.4%
to $7.9 million for the year ended December 31, 1999 compared to $6.7 million
for the year ended December 31, 1998. Property expenses increased $0.2
million, or 7.2% to $3.1 million for the year ended December 31, 1999 compared
to $2.9 million for the year ended December 31, 1998. An increase of $0.5
million in property expenses attributable to the Net Industrial Acquisitions
and the Industrial Development Properties was offset by a decrease of $0.3
million in property expenses at the Core Industrial Properties. This decrease
was primarily due to renegotiated property insurance premiums and a decrease
in electricity expense resulting from the implementation of energy management
systems at several of the buildings. Real estate taxes increased $1.0 million,
or 25.3% to $4.8 million for the year ended December 31, 1999 compared to $3.8
million for the year ended December 31, 1998. Of this increase, $0.8 million
was attributable to the Net Industrial Acquisitions and Industrial Development
Properties. The remaining $0.2 million increase was generated by the Core
Industrial Properties and was primarily due to acquisition related assessments
on industrial buildings acquired by the Company in 1997.

   Net operating income, as defined, from Industrial Properties increased $8.8
million, or 26.9% to $41.4 million for the year ended December 31, 1999
compared to $32.6 million for the year ended December 31, 1998. Of this
increase, $8.0 million was generated by the Net Industrial Acquisitions and
the Industrial Development Properties. The remaining increase of $0.8 million
was generated by the Core Industrial Properties and represented a 3.2%
increase in net operating income for the Core Industrial Properties.

Non-Property Related Income and Expenses

   Interest income decreased $0.5 million, or 30.8% to $1.2 million for the
year ended December 31, 1999 compared to $1.7 million for the year ended
December 31, 1998. This decrease was due primarily to the receipt of interest
income on notes receivable from related parties for three months during the
year ended December 31, 1999 versus seven months for the year ended December
31, 1998.

   General and administrative expenses increased $1.4 million, or 17.5% to
$9.1 million for the year ended December 31, 1999 compared to $7.7 million for
the year ended December 31, 1998. This increase was due primarily to annual
increases for salaries and benefits and increased depreciation related to the
Company's increased investment in its information systems.

   Interest expense increased $5.7 million, or 27.9% to $26.3 million for the
year ended December 31, 1999 compared to $20.6 million for the same period in
1998, primarily due to a net increase in the Company's aggregate indebtedness
during 1999 and a general increase in market LIBOR rates during 1999. The
Company's weighted average interest rate increased 0.4% to 7.7% at December
31, 1999 compared to 7.3% at December 31, 1998.

   Depreciation and amortization expense increased $7.6 million, or 29.0% to
$33.8 million for the year ended December 31, 1999 compared to $26.2 million
for the same period in 1998. The increase was primarily due to depreciation on
the Net Office and Industrial Acquisitions and the Office and Industrial
Development Properties.

   Net income for the year ended December 31, 1998 included a $1.7 million
provision for potentially unrecoverable pre-development costs. The provision
provided for costs incurred for development projects that the Company may at
some point in the development process decide not to pursue. The provision was
established

                                      32
<PAGE>

by estimating probable exposures to these types of costs for each of the
projects in the Company's development pipeline and applying a series of
probability factors based on the Company's historical experience. The Company
did not record an additional provision for potentially unrecoverable pre-
development costs during the year ended December 31, 1999 since the Company's
probability analyses supported the adequacy of the related allowance
throughout 1999.

Income

   Net income before gains on dispositions of operating properties, equity in
income of unconsolidated subsidiary, and minority interests increased $6.1
million, or 12.2% to $56.1 million for the year ended December 31, 1999 from
$50.0 million for the year ended December 31, 1998. The increase was primarily
due to the increase in net operating income from the Office and Industrial
Properties of $10.8 million and $8.8 million, respectively, offset primarily
by an increase in interest expense of $5.7 million and an increase in
depreciation and amortization of $7.6 million.

 Year Ended December 31, 1998 Compared to Year Ended December 31, 1997

   The 1997 results include the Company's results for the period February 1,
1997 to December 31, 1997 and the Kilroy Group's results for the period
January 1, 1997 to January 31, 1997.

<TABLE>
<CAPTION>
                                               Year ended
                                              December 31,
                                            ---------------- Dollar   Percentage
                                              1998    1997   Change     Change
                                            -------- ------- -------  ----------
                                                  (dollars in thousands)
<S>                                         <C>      <C>     <C>      <C>
Revenues:
  Rental income...........................  $117,338 $58,829 $58,509      99.5%
  Tenant reimbursements...................    14,956   7,057   7,899     111.9
  Interest income.........................     1,698   3,571  (1,873)    (52.5)
  Other income............................     3,096     907   2,189     241.3
                                            -------- ------- -------
    Total revenues........................   137,088  70,364  66,724      94.8
                                            -------- ------- -------
Expenses:
  Property expenses.......................    19,281   9,349   9,932     106.2
  Real estate taxes.......................    10,383   4,336   6,047     139.5
  General and administrative expenses.....     7,739   5,027   2,712      53.9
  Ground leases...........................     1,223   1,002     221      22.1
  Provision for potentially unrecoverable
   pre-development costs..................     1,700           1,700     100.0
  Development expense.....................                46     (46)   (100.0)
  Interest expense........................    20,568  11,633   8,935      76.8
  Depreciation and amortization...........    26,200  14,023  12,177      86.8
                                            -------- ------- -------
    Total expenses........................    87,094  45,416  41,678      91.8
                                            -------- ------- -------
Income before gains on dispositions of
 operating properties, equity in income of
 unconsolidated subsidiary, and minority
 interests................................  $ 49,994 $24,948 $25,046     100.4%
                                            ======== ======= =======
</TABLE>

                                      33
<PAGE>

Rental Operations

   Management evaluates the operations of its portfolio based on operating
property segment type. The following tables compare the net operating income,
defined as operating revenues less property and related expenses (property
expenses, real estate taxes and ground leases) before depreciation, for the
Office and Industrial Properties for the years ended December 31, 1998 and
1997. The 1997 results include the Company's results for the period February
1, 1997 to December 31, 1997 and the Kilroy Group's results for the period
January 1, 1997 to January 31, 1997.

<TABLE>
<CAPTION>
                                                Year ended
                                               December 31,
                                              --------------- Dollar  Percentage
                                               1998    1997   Change    Change
                                              ------- ------- ------- ----------
                                                    (dollars in thousands)
<S>                                           <C>     <C>     <C>     <C>
Office Properties
Operating revenues:
  Rental income.............................. $82,164 $43,756 $38,408    87.8%
  Tenant reimbursements......................  10,957   5,490   5,467    99.6
  Other income...............................   2,956     488   2,468   505.7
                                              ------- ------- -------
    Total....................................  96,077  49,734  46,343    93.2
                                              ------- ------- -------
Property and related expenses:
  Property expenses..........................  16,373   8,516   7,857    92.3
  Real estate taxes..........................   6,567   2,710   3,857   142.3
  Ground leases..............................   1,223   1,002     221    22.1
                                              ------- ------- -------
    Total....................................  24,163  12,228  11,935    97.6
                                              ------- ------- -------
Net operating income, as defined............. $71,914 $37,506 $34,408    91.7%
                                              ======= ======= =======
</TABLE>

   Total revenues from Office Properties increased $46.4 million, or 93.2% to
$96.1 million for the year ended December 31, 1998 compared to $49.7 million
for the year ended December 31, 1997. Rental income from Office Properties
increased $38.4 million, or 87.8% to $82.2 million for the year ended December
31, 1998 compared to $43.8 million for the year ended December 31, 1997. Of
this increase, $13.3 million was generated by office buildings acquired during
1998 (the "1998 Office Acquisitions") and $0.1 million was generated by the
Office Properties developed by the Company in 1998 (the "1998 Office
Development Properties"). In addition, $21.5 million of the increase was
attributable to a full year of operating results for the office buildings
acquired during 1997, subsequent to the IPO on January 31, 1997 (the "1997
Office Acquisitions"). The remaining $3.5 million of the increase was
generated by the 13 office buildings owned at the IPO and still owned at
December 31, 1998 (the "Existing Office Properties"), and represented a 10.0%
increase in rental income for the Existing Office Properties. This increase
was primarily attributable to leasing activity at the SeaTac Office Center,
including a lease for 211,000 rentable square feet with The Boeing Company
(the "Boeing Lease"), which was effective January 1, 1998. Excluding lease-up
at the SeaTac Office Center, occupancy remained consistent and the Existing
Office Properties experienced an approximate 2.8% increase in rental income
attributable to increases in rental rates.

   Tenant reimbursements from Office Properties increased $5.5 million, or
99.6% to $11.0 million for the year ended December 31, 1998 compared to $5.5
million for year ended December 31, 1997. Of this increase, $1.2 million was
attributable to the 1998 Office Acquisitions and the 1998 Office Development
Properties and $2.7 million was attributable to a full year of operating
results from the 1997 Office Acquisitions. The remaining $1.6 million was
attributable to the Existing Office Properties, of which $1.2 million
represented tenant reimbursements under the Boeing Lease. Other income from
Office Properties increased $2.5 million, or 505.7% to $3.0 million for the
year ended December 31, 1998 compared to $0.5 million for the same period in
1997. This increase was primarily due to the recognition of a $1.9 million net
lease termination fee from an office property in San Diego, California. This
property was subsequently re-leased at higher rates for a longer term. In
addition, in 1998 the Company earned a $0.5 million consulting fee for
assisting an existing tenant with potential expansion plans.

                                      34
<PAGE>

   Total expenses from Office Properties increased $12.0 million, or 97.6% to
$24.2 million for the year ended December 31, 1998 compared to $12.2 million
for the year ended December 31, 1997. Property expenses increased $7.9
million, or 92.3% to $16.4 million and real estate taxes increased $3.9
million, or 142.3% to $6.6 million for the year ended December 31, 1998
compared to $8.5 million and $2.7 million, respectively, for the year ended
December 31, 1997. Of the collective increase of $11.8 million in property
expenses and real estate taxes, $3.2 million was attributable to the 1998
Office Acquisitions and the 1998 Office Development Properties and $7.0
million was attributable to a full year of operating results from the 1997
Office Acquisitions. The remaining $1.6 million of the increase at the
Existing Office Properties was primarily due to the increase in variable costs
associated with the lease-up of space, and an increase in real estate taxes at
the SeaTac Office Center which resulted from the completion of substantial
renovations. Ground lease expense increased $0.2 million for the year ended
December 31, 1998 compared to the same period in 1997 primarily as a result of
a full year of ground lease expense on two of the 1997 Office Acquisitions.

   Net operating income, as defined, from Office Properties increased $34.4
million, or 91.7% to $71.9 million for the year ended December 31, 1998
compared to $37.5 million for the year ended December 31, 1997. Of this
increase, $31.1 million was generated by the 1998 Office Acquisitions, the
1998 Office Development Properties and the 1997 Office Acquisitions. The
remaining increase of $3.3 million was generated by the Existing Office
Properties and represented an 11.2% increase in net operating income for the
Existing Office Properties, which was primarily attributable to lease-up at
the SeaTac Office Center.

<TABLE>
<CAPTION>
                                               Year ended
                                              December 31,
                                             --------------- Dollar   Percentage
                                              1998    1997   Change     Change
                                             ------- ------- -------  ----------
                                                   (dollars in thousands)
<S>                                          <C>     <C>     <C>      <C>
Industrial Properties
Operating revenues:
  Rental income............................. $35,174 $15,073 $20,101    133.4%
  Tenant reimbursements.....................   3,999   1,567   2,432    155.2
  Other income..............................     140     419    (279)   (66.6)
                                             ------- ------- -------
    Total...................................  39,313  17,059  22,254    130.5
                                             ------- ------- -------
Property and related expenses:
  Property expenses.........................   2,908     833   2,075    249.1
  Real estate taxes.........................   3,816   1,626   2,190    134.7
                                             ------- ------- -------
    Total...................................   6,724   2,459   4,265    173.4
                                             ------- ------- -------
Net operating income, as defined............ $32,589 $14,600 $17,989    123.2%
                                             ======= ======= =======
</TABLE>

   Total revenues from Industrial Properties increased $22.3 million, or
130.5% to $39.3 million for the year ended December 31, 1998 compared to $17.0
million for the year ended December 31, 1997. Rental income from Industrial
Properties increased $20.1 million, or 133.4% to $35.2 million for the year
ended December 31, 1998 compared to $15.1 million for the year ended December
31, 1997. Of this increase, $3.4 million was generated by the industrial
buildings acquired during 1998 (the "1998 Industrial Acquisitions") and $2.1
million was generated by the industrial buildings developed by the Company in
1998 (the "1998 Industrial Development Properties"). In addition, $14.0
million of the increase was attributable to a full year of operating results
from the industrial buildings acquired in 1997, subsequent to the IPO on
January 31, 1997 (the "1997 Industrial Acquisitions"). The remaining $0.6
million of the increase was generated by the 11 industrial buildings owned at
the IPO and still owned at December 31, 1998 (the "Existing Industrial
Properties"), and represented a 7.4% increase in rental income for the
Existing Industrial Properties. This increase was primarily attributable to
the lease-up of 46,000 rentable square feet at the La Palma Business Center in
the second quarter of 1998, which had been vacant since the second quarter of
1997. Excluding the lease-up at La Palma Business Center, occupancy and rental
rates for the Existing Industrial Properties remained consistent.

                                      35
<PAGE>

   Tenant reimbursements from Industrial Properties increased $2.4 million, or
155.2% to $4.0 million for the year ended December 31, 1998 compared to $1.6
million for year ended December 31, 1997. Of this increase, $0.4 million was
attributable to the 1998 Industrial Acquisitions and the 1998 Industrial
Development Properties, and $1.8 million was attributable to a full year of
operating results from the 1997 Industrial Acquisitions. The remaining $0.2
million was attributable to the Existing Industrial Properties, of which $0.1
million represented an increase in tenant reimbursements at the La Palma
Business Center due to the lease-up of space, and $0.1 million correlated with
an increase in real estate taxes reimbursable by tenants. Other income from
Industrial Properties decreased $0.3 million, or 66.6% to $0.1 million for the
year ended December 31, 1998 compared to $0.4 million for the same period in
1997. Other income for the year ended December 31, 1997 included $0.2 million
related to receivables which were previously written off as uncollectible.

   Total expenses from Industrial Properties increased $4.3 million, or 173.4%
to $6.7 million for the year ended December 31, 1998 compared to $2.4 million
for the year ended December 31, 1997. Property expenses increased $2.1
million, or 249.1% to $2.9 million and real estate taxes increased $2.2
million, or 134.7% to $3.8 million for the year ended December 31, 1998
compared to $0.8 million and $1.6 million, respectively, for the year ended
December 31, 1997. Of the collective increase of $4.3 million in property
expenses and real estate taxes, $1.1 million was attributable to the 1998
Industrial Acquisitions and the 1998 Industrial Development Properties and
$3.1 million was attributable to the 1997 Industrial Acquisitions. The
remaining $0.1 million of the increase was attributable to the Existing
Industrial Properties and was due to an increase in real estate taxes
attributable to the reassessment of property values at the date of the IPO.
Property expenses for the Existing Industrial Properties remained consistent
for the year ended December 31, 1998 compared to the same period in 1997.

   Net operating income, as defined, from Industrial Properties increased
$18.0 million, or 123.2% to $32.6 million for the year ended December 31, 1998
compared to $14.6 million for the year ended December 31, 1997. Of this
increase, $17.7 million was generated from the 1998 Industrial Acquisitions,
the 1998 Industrial Development Properties and a full year of operating
results from the 1997 Industrial Acquisitions. The remaining increase of $0.3
million was generated by the Existing Industrial Properties and represented a
4.3% increase in net operating income for the Existing Industrial Properties,
which was primarily attributable to lease-up at the La Palma Business Center.

Non-Property Related Income and Expenses

   Interest income decreased $1.9 million, or 52.5% to $1.7 million for the
year ended December 31, 1998 compared to $3.6 million for the year ended
December 31, 1997. This decrease was attributable to the interest earned in
the prior year on the $116 million of net proceeds received from the Company's
IPO on January 31, 1997 and the $146 million of net proceeds received from the
Company's follow-on offering in August 1997 (the "August Offering"), which
were invested in short-term investments and which the Company used for the
acquisition of properties and repayment of indebtedness prior to January 1,
1998.

   General and administrative expenses increased $2.7 million, or 53.9% to
$7.7 million for the year ended December 31, 1998 compared to $5.0 million for
the year ended December 31, 1997, due to increased management, administrative
and personnel costs associated with the Company's increased portfolio size.

   Interest expense increased $9.0 million, or 76.8% to $20.6 million for the
year ended December 31, 1998 compared to $11.6 million for the same period in
1997, primarily due to a general increase in borrowings and higher monthly
average outstanding balances under the Company's unsecured credit facility
during 1998 and $32.9 million of mortgage debt assumed in connection with
fourth quarter 1997 acquisitions. The Company's weighted average interest rate
decreased 0.5% to 7.3% at December 31, 1998 compared to 7.8% at December 31,
1997.

   Depreciation and amortization expense increased $12.2 million, or 86.8% to
$26.2 million for the year ended December 31, 1998 compared to $14.0 million
for the same period in 1997. The increase was due to partial

                                      36
<PAGE>

year depreciation on $254 million of 1998 Office and Industrial Acquisitions
and a full year of depreciation on the 1997 Office and Industrial
Acquisitions.

   Net income for the year ended December 31, 1998 included a $1.7 million
provision for potentially unrecoverable pre-development costs. The provision
provided for costs incurred for development projects that the Company may at
some point in the development process decide not to pursue. The provision was
established by estimating probable exposures to these types of costs for each
of the projects in the Company's development pipeline and applying a series of
probability factors based on the Company's historical experience.

Income

   Net income before gains on dispositions of operating properties, equity in
income of unconsolidated subsidiary, and minority interests increased $25.0
million, or 100.4% to $50.0 million for the year ended December 31, 1998 from
$25.0 million for the year ended December 31, 1997. The increase was primarily
due to the increase in net operating income from the Office and Industrial
Properties of $34.4 million and $18.0 million, respectively, which was
primarily due to the acquisition of 1.4 million and 674,000 rentable square
feet of office and industrial space, respectively, during 1998, and operating
the 2.2 million and 3.7 million rentable square feet of office and industrial
space acquired during 1997 for a full year in 1998. The increase in net
operating income was offset primarily by an increase in interest expense of
$8.9 million and an increase in depreciation and amortization of $12.2
million.

Liquidity and Capital Resources

   In November 1999, the Company increased its borrowing capacity and obtained
a new $400 million unsecured revolving credit facility (the "Credit Facility")
to replace its previous $350 million Credit Facility which was scheduled to
mature in February 2000. The Credit Facility bears interest at a rate between
LIBOR plus 1.13% and LIBOR plus 1.75% (7.56% at December 31, 1999), depending
upon the Company's leverage ratio at the time of borrowing, and matures in
November 2002. At December 31, 1999, the Company had borrowings of $228
million outstanding under the Credit Facility and availability of
approximately $86.7 million. Availability under the Credit Facility depends
upon the value of the Company's pool of unencumbered assets. The Company
expects to use the $400 million Credit Facility to finance development
expenditures and for general corporate uses.

   In March 1999, the Company borrowed $95.0 million under a mortgage loan
that is secured by nine office and industrial properties, requires monthly
principal and interest payments based on a fixed annual interest rate of
7.20%, amortizes over 25 years and matures in April 2009. The Company used the
proceeds from the mortgage loan to repay borrowings under the $350 million
Credit Facility and to fund development expenditures.

   In April 1999, the Company borrowed $30.0 million under a mortgage loan
that is secured by one office property and the related ground leases, requires
monthly principal and interest payments based on a fixed annual interest rate
of 7.15% and matures in May 2017. The Company used the proceeds from the loan
to repay an existing variable rate mortgage loan with an outstanding balance
of $19.0 million, to repay outstanding borrowings under the $350 million
Credit Facility and to fund development expenditures.

   In October 1999, the Company borrowed $90.0 million under a secured debt
facility that is secured by 13 office properties, requires monthly interest
payments based on a floating interest rate of LIBOR plus 1.75% and matures in
October 2003. The Company used the proceeds from the secured debt facility to
repay outstanding borrowings under the $350 million Credit Facility and to
fund development expenditures.

                                      37
<PAGE>

   As a result of the three new mortgage loans obtained during 1999 and the
repayment of the one previously existing mortgage loan as discussed above, the
Company's outstanding mortgage debt increased to $326 million or 38.8% of the
Company's total market capitalization at December 31, 1999 from $133 million
or 32.0% of the Company's total market capitalization at December 31, 1998.
The following table lists the composition of the Company's mortgage debt at
December 31, 1999 and 1998:

<TABLE>
<CAPTION>
                                                               1999     1998
                                                             -------- --------
                                                              (in thousands)
   <S>                                                       <C>      <C>
   Mortgage note payable, due April 2009, fixed interest at
    7.20%, monthly principal and interest payments.........  $ 93,953
   Mortgage note payable, due October 2003, interest at
    LIBOR + 1.75%, (7.94% at December 31, 1999), monthly
    interest-only payments.................................    90,000
   Mortgage note payable, due February 2022, fixed interest
    at 8.35%, monthly principal and interest payments(a)...    80,812 $ 82,025
   Mortgage note payable, due May 2017, fixed interest at
    7.15%, monthly principal and interest payments.........    29,440
   Mortgage note payable, due January 2000, interest at
    LIBOR + 1.50%, (7.05% at December 31, 1998), monthly
    interest-only payments.................................             19,000
   Mortgage note payable, due December 2005, fixed interest
    at 8.45%, monthly principal and interest payments......    12,973   13,385
   Mortgage note payable, due November 2014, fixed interest
    at 8.43%, monthly principal and interest payments......    10,966   11,323
   Mortgage note payable, due October 2013, fixed interest
    at 8.21%, monthly principal and interest payments......     7,372    7,650
                                                             -------- --------
                                                             $325,516 $133,383
                                                             ======== ========
</TABLE>
- --------
(a) Beginning February 2005, the mortgage note is subject to increases in the
    effective interest rate to the greater of 13.35% or the sum of the
    interest rate for U.S. Treasury Securities maturing 15 years from the
    reset date plus 2.00%.

   The following table sets forth certain information with respect to the
Company's aggregate debt composition at December 31, 1999 and 1998:

<TABLE>
<CAPTION>
                                                                     Weighted
                                                           % of       Average
                                                           Total     Interest
                                                           Debt        Rate
                                                         ----------  ----------
                                                         1999  1998  1999  1998
                                                         ----  ----  ----  ----
   <S>                                                   <C>   <C>   <C>   <C>
   Secured vs. unsecured:
     Secured...........................................  58.8% 32.9% 7.8%  8.2%
     Unsecured.........................................  41.2% 67.1% 7.6%  6.8%

   Variable rate vs. fixed rate:
     Variable rate(1), (2), (3)........................  57.5% 71.8% 7.7%  6.8%
     Fixed rate........................................  42.5% 28.2% 7.8%  8.4%
</TABLE>
- --------
(1) At December 31, 1999, the Company had an interest rate cap agreement to
    cap LIBOR on $150 million of its floating rate debt at 6.5% which expires
    in July 2000.

(2) Subsequent to December 31, 1999, the Company entered into an 18-month
    interest rate cap agreement to cap LIBOR on $150 million of its floating
    rate debt at 6.5% starting in July 2000.

(3) Subsequent to December 31, 1999, the Company entered into a two-year
    interest rate swap agreement to fix $150 million of its floating rate
    debt. Had this agreement been in place at December 31, 1999, the Company's
    percentage of fixed rate debt to total debt would have increased to 69.7%
    and the Company's weighted average interest rate for variable and fixed
    rate debt would have been 8.0% and 7.8%, respectively.

                                      38
<PAGE>

   In December 1999, the Company issued 900,000 9.250% Series D Cumulative
Redeemable Preferred units, representing limited partnership interests in the
Operating Partnership (the "Series D Preferred units"), with a liquidation
value of $50.00 per unit, in exchange for a gross contribution to the
Operating Partnership of $45.0 million. The Company used the contribution
proceeds, less applicable transaction costs and expenses of $1.2 million, for
the repayment of borrowings outstanding under the Credit Facility. The Series
D Preferred units, which may be called by the Operating Partnership at par on
or after December 9, 2004, have no stated maturity or mandatory redemption and
are not convertible into any other securities of the Operating Partnership.
The Series D Preferred units are exchangeable at the option of the majority of
the holders for shares of the Company's 9.250% Series D Cumulative Redeemable
Preferred stock beginning December 9, 2009, or earlier under certain
circumstances.

   In December 1999, the Company announced the implementation of its share
repurchase program, pursuant to which the Company is authorized to repurchase
up to an aggregate of 3.0 million shares of its outstanding common stock,
representing up to approximately 11% of the Company's currently outstanding
shares at December 31, 1999. During December 1999, the Company repurchased
265,000 shares in open market transactions for an aggregate repurchase price
of $5.4 million or $20.19 per share. Repurchases transacted during December
1999 were funded through proceeds received from the sale of operating
properties during December 1999. The Company intends to finance the
continuation of its share repurchase program in 2000 through proceeds from a
targeted dispositions program of non-strategic and mature industrial assets.
Repurchases during 2000 will be made from time to time in the open market or
through privately negotiated transactions, and may be discontinued at any
time.

   In September 1999, the SEC declared effective the Company's registration
statement on Form S-3 with respect to 1,000,000 shares of the Company's common
stock to be issued under the Company's Dividend Reinvestment and Direct
Purchase Plan (the "Plan"). The Plan, which is designed to provide the
Company's stockholders and other investors with a convenient and economical
method to purchase shares of the Company's common stock, consists of three
programs: the Dividend Reinvestment Program (the "DRIP"), the Cash Option
Purchase Plan (the "COPP"), and the Waiver Discount Plan (the "WDP"). The DRIP
provides existing common stockholders with the opportunity to purchase
additional shares of the Company's common stock by automatically reinvesting
all or a portion of their cash dividends. The COPP provides existing common
stockholders and other investors with the opportunity to purchase additional
shares of the Company's common stock by making optional cash purchases, at no
discount to market, between $100 to $5,000 and $750 to $5,000, respectively,
in any calendar month. The WDP provides existing common stockholders and other
investors with the opportunity to purchase additional shares of the Company's
common stock by making optional cash purchases, at a discount to market of up
to 2.00% of the average per share price reported on the NYSE, of greater than
$5,000 in any calendar month. The Plan acquires shares of the Company's common
stock from either new issuances directly from the Company, from the open
market or from privately negotiated transactions, except for shares acquired
under the WDP which are purchased only from previously unissued shares of
common stock. Participation in the Plan is entirely voluntary, and can be
terminated at any time. The Company intends to use the proceeds received from
the Plan, less transaction costs, for development and investment activities,
repayment of outstanding indebtedness and general corporate uses. As of
December 31, 1999, there have been no previously unissued shares acquired
under the Plan.

   In February 1998, the SEC declared effective the Company's "shelf"
registration statement on Form S-3 with respect to $400 million of the
Company's equity securities. As of March 10, 2000, an aggregate of
$313 million of equity securities were available for issuance under the
registration statement.

Capital Expenditures

   As of December 31, 1999, the Company had approximately 1.4 million rentable
square feet of office space that was either under construction or committed
for construction at a total budgeted cost of approximately $274 million. The
Company has spent an aggregate of $122 million on these projects as of
December 31, 1999.

                                      39
<PAGE>

The Company intends to finance the presently budgeted $152 million of
remaining development costs with additional construction loan financing,
borrowings under the Credit Facility and working capital.

   In connection with an agreement signed with The Allen Group in October
1997, the Company has agreed to purchase one office property encompassing
128,000 rentable square feet, subject to the property meeting certain
occupancy thresholds. The purchase price for this property will be determined
at the time of acquisition based on the net operating income at that time. The
Company expects that in the event that this acquisition does occur, it would
be financed with borrowings under the Credit Facility and the issuance of
common limited partnership units of the Operating Partnership.

   The agreement with The Allen Group also provides for the development of two
office projects in San Diego, California with approximately 1.1 million
aggregate rentable square feet for an estimated aggregate development cost of
approximately $200 million. During the first quarter of 1999, the Company
purchased a 50% managing interest in both of the development projects. The
Company has the option to purchase The Allen Group's remaining interest in
both projects for a purchase price to be determined upon completion of the
projects. Construction of phase I of both of the office projects was completed
during the third and fourth quarters of 1999. Construction of phases II and
III of the first office project commenced during the second and third quarters
of 1999, respectively, and phase IV is scheduled to begin during the second
quarter of 2000. Construction of phases II and III of the second office
project is scheduled to begin during the first quarters of 2000 and 2001,
respectively. The total presently budgeted investment of $109 million for the
in process and committed phases of these two office projects discussed herein
are included in the Company's total budgeted development costs of $274 million
discussed above. In addition, the Company has spent an aggregate of $42.3
million on the development of these phases as of December 31, 1999, which is
included in the aggregate expenditures of $122 million discussed above.

   The Company believes that it will have sufficient capital resources to
satisfy its obligations and planned capital expenditures for the next twelve
months. The Company expects to meet its long-term liquidity requirements
including possible future development and property acquisitions, through
retained cash flow, long-term secured and unsecured borrowings, the issuance
of debt or equity securities or the issuance of common or preferred units of
the Operating Partnership.

                                      40
<PAGE>

Historical Recurring Capital Expenditures, Tenant Improvements and Leasing
Costs

   The following tables set forth the non-incremental revenue generating
recurring capital expenditures, excluding expenditures that are recoverable
from tenants, tenant improvements and leasing commissions for renewed and re-
tenanted space incurred for the three years ended December 31, 1999, 1998, and
1997 on a per square foot basis.

<TABLE>
<CAPTION>
                                                       Year Ended December 31,
                                                      --------------------------
                                                        1999     1998     1997
                                                      -------- -------- --------
<S>                                                   <C>      <C>      <C>
Office Properties:
Capital Expenditures:
  Capital expenditures per square foot............... $   0.08 $   0.20 $   0.16
Tenant Improvement and Leasing Costs(1):
  Replacement tenant square feet.....................  196,615  276,992   17,068
    Tenant improvements per square foot leased....... $   5.61 $   1.21 $   6.56
    Leasing commissions per square foot leased....... $   4.18 $   2.12 $   1.64
    Total per square foot............................ $   9.79 $   3.33 $   8.20
  Renewal tenant square feet.........................  421,685  265,154
    Tenant improvements per square foot leased....... $   2.85 $   1.00
    Leasing commissions per square foot leased....... $   0.84 $   0.89
    Total per square foot............................ $   3.69 $   1.89
Total per square foot per year....................... $   2.32 $   0.84 $   1.55
Average lease term...................................      5.8      6.2      5.3

Industrial Properties:
Capital Expenditures:
  Capital expenditures per square foot............... $   0.02 $   0.05 $   0.11
Tenant Improvement and Leasing Costs(1):
  Replacement tenant square feet.....................  323,432  420,194  145,581
    Tenant improvements per square foot leased....... $   2.41 $   0.61
    Leasing commissions per square foot leased....... $   1.76 $   0.44 $   1.08
    Total per square foot............................ $   4.17 $   1.05 $   1.08
  Renewal tenant square feet.........................  398,184  549,158  323,825
    Tenant improvements per square foot leased....... $   0.20 $   0.06 $   0.02
    Leasing commissions per square foot leased....... $   0.07 $   0.16 $   0.23
    Total per square foot............................ $   0.27 $   0.22 $   0.25
Total per square foot per year....................... $   0.94 $   0.22 $   0.31
Average lease term...................................      4.7      5.8      4.3
</TABLE>
- --------
(1) Includes only tenants with lease terms of 12 months or longer. Excludes
    leases for amenity, parking, retail and month-to-month tenants.

   Capital expenditures may fluctuate in any given period subject to the
nature, extent, and timing of improvements required to be made to the
properties. The Company believes that all of its Office and Industrial
Properties are well maintained and, based on engineering reports obtained
within the last five years, do not require significant capital improvements.
Tenant improvements and leasing costs may also fluctuate in any given year
depending upon factors such as the property, the term of the lease, the type
of lease, the involvement of external leasing agents and overall market
conditions.

                                      41
<PAGE>

Building and Lease Information

   The following tables set forth certain information regarding the Company's
Office and Industrial Properties at December 31, 1999:

                           Occupancy by Segment Type

<TABLE>
<CAPTION>
                                                 Square Feet
                             Number of -------------------------------
Region                       Buildings   Total      Leased   Available Occupancy
- ------                       --------- ---------- ---------- --------- ---------
<S>                          <C>       <C>        <C>        <C>       <C>
Office Properties:
  Los Angeles...............     28     2,554,454  2,488,347   66,107     97.4%
  Orange County.............     22       908,147    780,395  127,752     85.9
  San Diego.................     28     1,975,770  1,957,549   18,221     99.1
  Other.....................      6       709,614    700,322    9,292     98.7
                                ---    ---------- ----------  -------
                                 84     6,147,985  5,926,613  221,372     96.4%
                                ---    ---------- ----------  -------
Industrial Properties:
  Los Angeles...............      7       554,225    549,928    4,297     99.2%
  Orange County.............     65     4,548,808  4,386,964  161,844     96.4
  San Diego.................      3       200,174    200,174      --     100.0
  Other.....................     12     1,173,925  1,141,602   32,323     97.2
                                ---    ---------- ----------  -------
                                 87     6,477,132  6,278,668  198,464     96.9%
                                ---    ---------- ----------  -------
Total Portfolio.............    171    12,625,117 12,205,281  419,836     96.7%
                                ===    ========== ==========  =======
</TABLE>

                       Lease Expirations by Segment Type

<TABLE>
<CAPTION>
                                                  Percentage of
                                         Square   Total Leased
                                         Footage   Square Feet    Annual Base
                              Number of    of      Represented    Rent Under
                              Expiring  Expiring   by Expiring  Expiring Leases
Year of Lease Expiration      Leases(1)  Leases     Leases(2)    (in 000's)(3)
- ------------------------      --------- --------- ------------- ---------------
<S>                           <C>       <C>       <C>           <C>
Office Properties:
2000.........................     89      379,552      6.2%         $ 7,050
2001.........................     84    1,075,655     17.6           16,454
2002.........................     66      571,575      9.4            8,882
2003.........................     39      228,146      3.7            4,339
2004.........................     51      826,376     13.5           18,697
                                 ---    ---------     ----          -------
                                 329    3,081,304     50.4%         $55,422
                                 ---    ---------                   -------
Industrial Properties:
2000.........................     75      980,430     16.2%         $ 7,432
2001.........................     64      651,980     10.8            4,778
2002.........................     37      222,065      3.7            2,190
2003.........................     28      754,993     12.5            5,763
2004.........................     17      591,256      9.8            4,506
                                 ---    ---------     ----          -------
                                 221    3,200,704     53.0%         $24,699
                                 ---    ---------                   -------
Total Portfolio..............    550    6,282,028     51.7%         $80,091
                                 ===    =========                   =======
</TABLE>
- --------
(1) Includes tenants only. Excludes leases for amenity, retail, parking and
    month to month tenants. Some tenants have multiple leases.

(2) Based on total leased square footage for the respective portfolios as of
    December 31, 1999, unless a lease for a replacement tenant had been
    executed on or before January 1, 2000.

(3) Determined based upon aggregate base rent to be received over the term,
    divided by the term in months, multiplied by 12, including all leases
    executed on or before January 1, 2000.

                                      42
<PAGE>

                       Leasing Activity by Segment Type
                     For the year ended December 31, 1999

<TABLE>
<CAPTION>
                             Number of                                Weighted
                              Leases       Square Feet                Average
                            ----------- ----------------- Retention  Lease Term
                            New Renewal  New(1)   Renewal   Rate    (in months.)
                            --- ------- --------- ------- --------- ------------
<S>                         <C> <C>     <C>       <C>     <C>       <C>
Office Properties..........  84    71     694,620 435,164   44.4%        70
Industrial Properties......  70    51     518,443 470,119   51.5%        56
                            ---   ---   --------- -------
Total Portfolio............ 154   122   1,213,063 905,283   47.8%        63
                            ===   ===   ========= =======
</TABLE>
- --------
(1) The lease-up of 1,213,063 square feet to new tenants includes re-leasing
    of 853,964 square feet and first generation leasing of 359,099 square
    feet.

Year 2000

   The Year 2000 issue ("Y2K") refers to the inability of certain computer
systems, as well as certain hardware and equipment containing date sensitive
data, to recognize accurate dates commencing on or after January 1, 2000. This
has the ability to affect those systems adversely.

   In 1997, the Company's Information Technology Committee, comprised of
representatives from senior management and various departments including
accounting, property management and management information systems, identified
three phases in the Company's Y2K efforts: discovery and assessment,
remediation and implementation, and testing and verification. The Company had
successfully completed all of the aforementioned stages by November 1999.

   As of March 10, 2000, the Company has not experienced any significant Y2K
problems nor has the Company experienced any interruptions in its normal
operations from Y2K issues experienced by any of its significant tenants,
vendors, suppliers or other relevant third parties. Further, the Company's Y2K
costs incurred to date have been minimal and have not been material to the
Company's financial position or results of operations. The Company does not
expect to incur any significant additional costs for Y2K related issues in the
future.

Distribution Policy

   The Company makes quarterly distributions to common stockholders from cash
available for distribution and, if necessary to meet REIT distribution
requirements and maintain its REIT status, may use borrowings under the Credit
Facility. All such distributions are at the discretion of the Board of
Directors. Amounts accumulated for distribution are invested primarily in
interest-bearing accounts and short-term interest-bearing securities, which
are consistent with the Company's intention to maintain its qualification as a
REIT. Such investments may include, for example, obligations of the Government
National Mortgage Association, other governmental agency securities,
certificates of deposit and interest-bearing bank deposits.

Historical Cash Flows

   The principal sources of funding for development, acquisitions, and capital
expenditures are the Credit Facility, public equity financing, cash flow from
operating activities and secured debt financing. The Company's net cash
provided by operating activities increased $11.2 million, or 15.2% to $84.6
million for the year ended December 31, 1999 compared to $73.4 million for the
year ended December 31, 1998. This increase was primarily attributable to the
increase in net income resulting from the Net Office and Industrial
Acquisitions and the Office and Industrial Development Properties and an
increase in net operating income, as defined, generated by the Core Office and
Industrial Properties. The increase was partially offset by increased interest
expense and general and administrative expenses and a decrease in interest
income.


                                      43
<PAGE>

   Cash used in investing activities decreased $151 million, or 43.9% to $193
million for the year ended December 31, 1999 compared to $344 million for the
year ended December 31, 1998. Cash used in investing activities for the year
ended December 31, 1999 consisted primarily of the purchase of three office
buildings for $24.7 million (net of $3.6 million of contributed value in
exchange for which the Company issued common units of the Operating
Partnership and the repayment of an existing $2.3 million note receivable from
related parties), the purchase of the minority interest in one office complex
for $1.2 million, the purchase of 31 acres of undeveloped land for $16.3
million (net of $2.5 million of contributed value in exchange for which the
Company issued common units of the Operating Partnership), the acquisition of
a 50% interest in 55 acres of undeveloped land for $16.1 million (net of $3.8
million of contributed value in exchange for which the Company issued common
limited partnership units of the Operating Partnership), the sale of five
office and five industrial properties for $22.6 million, the sale of 13 acres
of undeveloped land for $5.1 million, expenditures for construction in
progress of $144 million, and $17.0 million in additional tenant improvements
and capital expenditures. Cash used in investing activities for year ended
December 31, 1998 consisted primarily of the purchase of 25 Office and 16
Industrial Properties during 1998 for $236 million (net of $18.1 million of
contributed value in exchange for which the Company issued common units of the
Operating Partnership), the purchase of 56 acres of undeveloped land for $25.4
million (net of $2.5 million of contributed value in exchange for which the
Company issued common units of the Operating Partnership), expenditures for
construction in progress of $65.5 million, and $13.5 million in additional
tenant improvements and capital expenditures.

   Cash provided by financing activities decreased $140 million, or 52.3% to
$128 million for the year ended December 31, 1999 compared to $268 million for
the year ended December 31, 1998. Cash provided by financing activities for
the year ended December 31, 1999 consisted primarily of $192 million in net
proceeds from the issuance of mortgage debt and the issuance of $45.0 million
of 9.250% Series D Preferred units (net of $1.2 million aggregate transaction
costs), partially offset by $44.0 million in repayments to the Credit
Facility, $53.6 million in distributions paid to common stockholders and
common unitholders and $5.4 million for the Company's stock repurchase
program. Cash provided by financing activities for the year ended December 31,
1998 consisted primarily of $81.8 million in net proceeds from the issuance of
3,012,326 shares of common stock through four underwritten public offerings
and the issuance of 161,884 shares of common stock through two public direct
placements, the issuance of $75.0 million of 8.075% Series A Preferred units
and $35.0 million of 9.375% Series C Preferred units (net of $3.0 million
aggregate transaction costs), and net proceeds of $132 million from the
issuance of mortgage debt and net borrowings on the Credit Facility, partially
offset by $48.8 million in distributions paid to common stockholders and
common unitholders.

Funds from Operations

   Industry analysts generally consider Funds From Operations, as defined by
NAREIT, an alternative measure of performance for an equity REIT. Funds From
Operations is defined by NAREIT to mean net income (loss) before minority
interests of common unitholders (computed in accordance with GAAP), excluding
gains (or losses) from debt restructuring and sales of property, plus real
estate related depreciation and amortization (excluding amortization of
deferred financing costs and depreciation of non-real estate assets), and
after adjustment for unconsolidated partnerships and joint ventures. The
Company considers Funds From Operations an appropriate measure of performance
of an equity REIT because it is predicated on cash flow analyses. The Company
believes that in order to facilitate a clear understanding of the historical
operating results of the Company, Funds From Operations should be examined in
conjunction with net income as presented in the financial statements included
elsewhere in this report. The Company computes Funds From Operations in
accordance with standards established by the Board of Governors of NAREIT in
its March 1995 White Paper, which may differ from the methodologies used by
other equity REITs and, accordingly, may not be comparable to Funds From
Operations published by such other REITs. Funds From Operations should not be
considered as an alternative to net income (loss) (computed in accordance with
GAAP) as an indicator of the properties' financial performance or to cash flow
from operating activities (computed in accordance with GAAP) as an indicator
of the properties' liquidity, nor is it indicative of funds available to fund
the properties' cash needs, including the Company's ability to pay dividends
or make distributions.


                                      44
<PAGE>

   The following table presents the Company's Funds from Operations, by
quarter, for the years ended December 31, 1999 and 1998 and the period
February 1, 1997 to December 31, 1997:

<TABLE>
<CAPTION>
                                              1999 Quarter Ended
                                -----------------------------------------------
                                December 31, September 30, June 30,   March 31,
                                ------------ ------------- -------- -----------
                                                (in thousands)
<S>                             <C>          <C>           <C>      <C>
Net income.....................   $ 8,278       $10,911    $10,796   $ 9,910
Add:
  Minority interest in earnings
   of Operating Partnership....     1,294         1,830      1,820     1,536
  Depreciation and
   amortization................    11,217         7,900      7,460     7,217
  (Gains) losses on
   dispositions of operating
   properties..................        29           (75)
  Other........................       127           127        127       127
                                  -------       -------    -------   -------
Funds From Operations..........   $20,945       $20,693    $20,203   $18,790
                                  =======       =======    =======   =======
<CAPTION>
                                              1998 Quarter Ended
                                -----------------------------------------------
                                December 31, September 30, June 30,   March 31,
                                ------------ ------------- --------  ----------
                                                (in thousands)
<S>                             <C>          <C>           <C>      <C>
Net income.....................   $10,173       $ 9,985    $ 9,785   $ 8,879
Add:
  Minority interest in earnings
   of Operating Partnership....     1,528         1,451      1,432     1,210
  Depreciation and
   amortization................     7,041         6,740      6,565     5,854
  Other........................       126           175        112       118
                                  -------       -------    -------   -------
Funds From Operations..........   $18,868       $18,351    $17,894   $16,061
                                  =======       =======    =======   =======
<CAPTION>
                                        1997 Quarter Ended
                                ----------------------------------  February 1,
                                                                    to March 31,
                                December 31, September 30, June 30,    1997
                                ------------ ------------- -------- ------------
                                                (in thousands)
<S>                             <C>          <C>           <C>      <C>
Net income.....................   $ 8,820       $ 6,480    $ 4,108   $ 2,652
Add:
  Minority interest in
   earnings....................     1,182           977        768       486
  Depreciation and
   amortization................     4,832         3,660      3,000     1,744
  Other........................       118           118        120        77
                                  -------       -------    -------   -------
Funds From Operations..........   $14,952       $11,235    $ 7,996   $ 4,959
                                  =======       =======    =======   =======
</TABLE>

Inflation

   The majority of the Company's leases require tenants to pay most operating
expenses, including real estate taxes and insurance, and increases in common
area maintenance expenses. The effect of such provisions is to reduce the
Company's exposure to increases in costs and operating expenses resulting from
inflation.

New Accounting Pronouncements

   In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 133 "Accounting for Derivative Instruments
and Hedging Activities" ("SFAS 133"). SFAS 133 is effective for fiscal years
beginning after June 15, 2000 and requires all derivatives to be recorded on
the balance sheet at fair value as either assets or liabilities depending on
the rights or obligations under the contract. SFAS 133 also establishes new
accounting methodologies for the following three classifications of hedges:
fair value, cash flow and net investment in foreign operations. Depending on
the nature of the hedge, changes in fair value of derivatives will either be
offset against the change in fair value of the hedged assets, liabilities, or
firm commitments or recognized in earnings. The ineffective portion of a
derivative's change in fair value will be immediately recognized in earnings.
Management believes the adoption of SFAS 133 will not have a material impact
on the Company's financial position or results of operations.

                                      45
<PAGE>

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

   Since the Company's IPO in January 1997, management has executed a
financial strategy which has positioned the Company to be flexible and
responsive to the variations in the public and private financial markets. The
principal objectives of the Company's current debt and capital management
strategies are to maintain prudent amounts of leverage and to minimize capital
costs and interest expense while carefully and continuously evaluating
available debt and equity resources.

   The primary market risk faced by the Company is the risk of interest rate
fluctuations. More specifically, the primary market risk faced by the Company
is market risk resulting from increasing LIBOR based interest rates since at
December 31, 1999, interest expense on $318 million, or 57.5%, of the
Company's total $554 million of debt, including borrowings under the Credit
Facility, are tied to a LIBOR based interest rate. As a result, the Company
pays lower rates of interest in periods of decreasing interest rates and
higher rates of interest in periods of increasing interest rates. To mitigate
the effect of changes in interest rates on Credit Facility borrowings and in
compliance with Credit Facility debt covenants, in July 1999, the Company
entered into two interest rate cap agreements with a total notional amount of
$150 million to effectively limit interest expense for borrowings under the
Credit Facility during periods of increasing interest rates. The agreements
have LIBOR based cap rates of 6.50% and expire in July 2000. The Company's
exposure is limited to the unamortized cost of the caps. The cost of the cap
agreements were fully amortized at December 31, 1999.

   The Company is also subject to risk resulting from fluctuations in the
general level of U.S. interest rates since at December 31, 1999, $236 million,
or 42.5%, of the Company's total $554 million of debt arrangements are
established at a fixed weighted average interest rate of 7.75%, and since
quarterly distributions of $1.5 million, $0.8 million, and $1.0 million paid
to Series A, Series C and Series D Preferred unitholders, respectively, are
calculated based upon a fixed rate of 8.075%, 9.375%, and 9.250% respectively.
As a result, the Company will pay contractually agreed upon fixed rates of
interest regardless of fluctuations in the general interest rate environment.

   The tabular presentation below provides information about the Company's
interest rate sensitive financial and derivative instruments at December 31,
1999. All of the Company's interest rate sensitive financial and derivative
instruments are designated as held for purposes other than trading. Following
the tabular presentation is additional information summarizing changes in the
Company's market risk profile from 1998 to 1999 as well as changes in the
Company's market risk profile subsequent to December 31, 1999.

   For the Credit Facility, the table presents the assumption that the
outstanding principal balance at December 31, 1999 will be paid upon the
Credit Facility's maturity in November 2002. The table also presents the
related expected maximum interest rate index for outstanding Credit Facility
borrowings from 2000 through 2002.

   For variable rate mortgage debt, the table presents the assumption that the
outstanding principal balance at December 31, 1999 will be paid upon maturity
in October 2003. The table also presents the related interest rate index for
outstanding variable rate mortgage debt borrowings from 2000 through 2003.

   For fixed rate mortgage debt, the table presents the assumption that the
outstanding principal balance at December 31, 1999 will be paid according to
scheduled principal payments and that the Company will not prepay any of the
outstanding principal balance. The table also presents the related weighted-
average interest rate for outstanding fixed rate mortgage debt borrowings from
2000 through 2004 and thereafter.

   For the Series A and Series C Cumulative Redeemable Preferred units (the
"Preferred units"), the table reflects the assumption that the Company is not
contractually obligated to repay the outstanding balance of the Preferred
units since the Preferred units will either remain outstanding or be converted
into shares of the Company's 8.075% Series A and 9.375% Series C Cumulative
Redeemable Preferred stock, respectively, in 2008 when the Preferred units
become exchangeable at the option of the majority of the holders. For the
Series D Cumulative Redeemable Preferred units (the "Preferred units"), the
table reflects the assumption that the

                                      46
<PAGE>

Company is not contractually obligated to repay the outstanding balance of the
Preferred units since the Preferred units will either remain outstanding or be
converted into shares of the 9.250% Series D Cumulative Redeemable Preferred
stock, in 2009 when the Preferred units become exchangeable at the option of
the majority of the holders. The table also presents the related weighted-
average interest rate for outstanding Preferred units from 2000 through the
exchange date. The same interest rates will apply when the Preferred units are
exchanged into the Cumulative Redeemable Preferred stock.

   For interest rate caps, the table presents notional amounts, average cap
rates and the related interest rate index upon which cap rates are based, by
contractual maturity date. Notional amounts are used solely to calculate the
contractual cash flow to be received under the contract and do not reflect
outstanding principal balances at December 31, 1999.

               Interest Rate Risk Analysis--Tabular Presentation
                       Financial Assets and Liabilities
                Outstanding Principal by Expected Maturity Date
                             (dollars in millions)

<TABLE>
<CAPTION>
                                       Maturity Date                        Fair Value
                         -----------------------------------------              at
                                                            There-         December 31,
                          2000  2001    2002   2003   2004  after   Total      1999
                         ------ ------ ------ ------ ------ ------  ------ ------------
<S>                      <C>    <C>    <C>    <C>    <C>    <C>     <C>    <C>
Liabilities:
Unsecured line of
 credit:
  Variable rate.........               $228.0                       $228.0    $228.0
  Average interest rate
   index................  LIBOR  LIBOR  LIBOR
                         +1.50% +1.50% +1.50%
Mortgage debt:
  Variable rate.........                      $ 90.0                $ 90.0    $ 90.0
  Average interest rate
   index................  LIBOR  LIBOR  LIBOR  LIBOR  LIBOR
                         +1.75% +1.75% +1.75% +1.75% +1.75%

  Fixed rate............ $  4.8 $  5.2 $  5.6 $  6.1 $  6.6 $207.2  $235.5    $225.4
  Average interest
   rate.................  7.75%  7.75%  7.75%  7.75%  7.75%  7.75%

Series A, C and D
 Preferred units:
  Fixed rate............                                                      $145.9
  Average interest
   rate.................  8.71%  8.71%  8.71%  8.71%  8.71%   8.71%
</TABLE>

               Interest Rate Risk Analysis--Tabular Presentation
                       Financial Derivative Instruments
                   Notional Amounts by Contractual Maturity
                             (dollars in millions)

<TABLE>
<CAPTION>
                                   Maturity Date                   Fair Value
                         ---------------------------------             at
                                                    There-        December 31,
                          2000  2001 2002 2003 2004 after  Total      1999
                         ------ ---- ---- ---- ---- ------ ------ ------------
<S>                      <C>    <C>  <C>  <C>  <C>  <C>    <C>    <C>
Interest Rate
 Derivatives Used to
 Hedge the Line of
 Credit:
Interest rate cap
 agreements:
  Notional amount....... $150.0                            $150.0    $ --
  Cap rate..............  6.50%
  Forward rate index....  LIBOR
</TABLE>


                                      47
<PAGE>

Changes in Primary Risk Exposures

 Changes from December 31, 1998 to December 31, 1999

   The following table demonstrates the change in market risk profile of the
Company's outstanding debt from December 31, 1998 to December 31, 1999. The
change from year to year reflects a conscious strategy by management to fix a
larger proportion of the Company's outstanding debt balances during 1999.

<TABLE>
<CAPTION>
                                                                     Weighted
                                                           % of       Average
                                                           Total     Interest
                                                           Debt        Rate
                                                         ----------  ----------
                                                         1999  1998  1999  1998
                                                         ----  ----  ----  ----
   <S>                                                   <C>   <C>   <C>   <C>
   Variable rate vs. fixed rate debt:
     Variable rate(1),(2),(3)........................... 57.5% 71.8% 7.7%  6.8%
     Fixed rate......................................... 42.5% 28.2% 7.8%  8.4%
</TABLE>
- --------
(1) At December 31, 1999, the Company had an interest rate cap agreement to
    cap LIBOR on $150 million of its floating rate debt at 6.5% which expires
    in July 2000.
(2) Subsequent to December 31, 1999, the Company entered into an 18-month
    interest rate cap agreement to cap LIBOR on $150 million of its floating
    rate debt at 6.5% starting in July 2000.
(3) Subsequent to December 31, 1999, the Company entered into a two-year
    interest rate swap agreement to fix $150 million of its floating rate
    debt. Had this agreement been in place at December 31, 1999, the Company's
    percentage of fixed rate debt to total debt would have increased to 69.7%
    and the Company's weighted average interest rate for variable and fixed
    rate debt would have been 8.0% and 7.8%, respectively.

   During 1999, the Company issued 900,000 Series D Preferred units in
addition to the 1,200,000 Series A and 700,000 Series C Preferred units issued
during the year ended December 31, 1998. Beginning in the first quarter of
2000, quarterly distributions of $1.0 million, calculated using a fixed rate
of 9.25%, will be payable to the Series D Preferred unitholders in addition to
the $1.5 million and $0.8 million currently paid to the Series A and Series C
unitholders, respectively. For the year ended December 31, 1999, distributions
accrued for the Series D Preferred unitholders totaled approximately $0.2
million.

 Changes Subsequent to December 31, 1999

   In February 2000, the Company entered into an interest rate swap agreement
with a total notional amount of $150 million and an interest rate cap
agreement with a total notional amount of $150 million to effectively limit
interest expense on the Company's floating rate debt instruments during
periods of increasing interest rates. The swap agreement, which begins in
February 2000 and expires in February 2002, requires the Company to pay a
fixed rate interest payment based on an interest rate of 6.95% and receive a
floating rate interest payment based on one-month LIBOR. The cap agreement,
which begins in July 2000 when the Company's existing $150 million cap
agreements expire, has a LIBOR based cap rate of 6.50% and expires in January
2002. The Company's exposure on the cap agreement is limited to the $1.9
million cost of the cap agreement which the Company will amortize over the
life of the agreement. Had these two agreements been in place as of December
31, 1999, the Company's ratio of fixed rate debt to total debt would have
increased from 42.5% to 69.7% and the Company's weighted average interest rate
for fixed and variable rate debt would have increased from 7.75% and 7.67%,
respectively, to 7.97% and 7.76%, respectively.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

   See the index included at "Item 14. Exhibits, Financial Statement
Schedules, and Reports on Form 8-K."

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
        FINANCIAL DISCLOSURE

   None.

                                      48
<PAGE>

                                   PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

   The information required by Item 10 is incorporated by reference from the
Company's definitive proxy statement for its annual stockholders' meeting
presently scheduled to be held on May 23, 2000.

ITEM 11. EXECUTIVE COMPENSATION

   The information required by Item 11 is incorporated by reference from the
Company's definitive proxy statement for its annual stockholders' meeting
presently scheduled to be held on May 23, 2000.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

   The information required by Item 12 is incorporated by reference from the
Company's definitive proxy statement for its annual stockholders' meeting
presently scheduled to be held on May 23, 2000.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

   The information required by Item 13 is incorporated by reference from the
Company's definitive proxy statement for its annual stockholders' meeting
presently scheduled to be held on May 23, 2000.

                                      49
<PAGE>

                                    PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

   (a)(1) and (2) Financial Statements and Schedules

   The following consolidated financial information is included as a separate
section of this annual report on Form 10-K:

<TABLE>
   <S>                                                                      <C>
   Independent Auditors' Report...........................................   F-2
   Consolidated Balance Sheets as of December 31, 1999 and 1998...........   F-3
   Consolidated Statements of Operations for the years ended December 31,
    1999 and 1998 and the period February 1, 1997 to December 31, 1997 and
    Combined Statement of Operations for the period January 1, 1997 to
    January 31, 1997......................................................   F-4
   Consolidated Statements of Stockholders' Equity for the years ended
    December 31, 1999 and 1998 and the period from February 1, 1997 to
    December 31, 1997.....................................................   F-5
   Combined Statement of Accumulated Deficit for the period January 1,
    1997 to January 31, 1997..............................................   F-6
   Consolidated Statements of Cash Flows for the years ended December 31,
    1999 and 1998 and Combined Statement of Cash Flows for the year ended
    December 31, 1997.....................................................   F-7
   Notes to Consolidated and Combined Financial Statements................   F-8
   Schedule of Valuation and Qualifying Accounts..........................  F-38
</TABLE>

   All other schedules are omitted since the required information is not
present in amounts sufficient to require submission of the schedule or because
the information required is included in the financial statements and notes
thereto.

   (3) Exhibits

<TABLE>
<CAPTION>
 Exhibit
 Number                                Description
 -------                               -----------
 <C>     <S>
  3.1    Articles of Amendment and Restatement of the Registrant(1)

  3.2    Amended and Restated Bylaws of the Registrant(1)

  3.3    Form of Certificate for Common Stock of the Registrant(1)

  3.4    Articles Supplementary of the Registrant designating 8.075% Series A
          Cumulative Redeemable Preferred Stock(10)

  3.5    Articles Supplementary of the Registrant, designating 8.075% Series A
          Cumulative Redeemable Preferred Stock(13)

  3.6    Articles Supplementary of the Registrant designating its Series B
          Junior Participating Preferred Stock (to be filed by amendment)

  3.7    Articles Supplementary of the Registrant designating its 9.375% Series
          C Cumulative Redeemable Preferred Stock(15)

 *3.8    Articles Supplementary of the Registrant designating its 9.250% Series
          D Cumulative Redeemable Preferred Stock

  4.1    Registration Rights Agreement, dated January 31, 1998(1)

  4.2    Registration Rights Agreement, dated February 6, 1999(10)

  4.3    Registration Rights Agreement, dated April 20, 1999(13)

  4.4    Registration Rights Agreement, dated November 24, 1999(15)

  4.5    Registration Rights Agreement, dated as of October 31, 1998(7)
</TABLE>


                                      50
<PAGE>


<TABLE>
<CAPTION>
 Exhibit
 Number                                Description
 -------                               -----------
 <C>     <S>
  4.6    Rights Agreement, dated as of October 2, 1999 between Kilroy Realty
          Corporation and ChaseMellon Shareholder Services, L.L.C., as Rights
          Agent, which includes the form of Articles Supplementary of the
          Series B Junior Participating Preferred Stock of Kilroy Realty
          Corporation as Exhibit A, the form of Right Certificate as Exhibit B
          and the Summary of Rights to Purchase Preferred Shares as Exhibit
          C(16)

 *4.7    Registration Rights Agreement, dated as of December 9, 1999

 10.1    Fourth Amended and Restated Agreement of Limited Partnership of Kilroy
          Realty, L.P., dated November 24, 1999(15)

 10.2    Omnibus Agreement, dated as of October 30, 1996, by and among Kilroy
          Realty, L.P. and the parties named therein(1)

 10.3    Supplemental Representations, Warranties and Indemnity Agreement by
          and among Kilroy Realty, L.P. and the parties named therein(1)

 10.4    Pledge Agreement by and among Kilroy Realty, L.P., John B. Kilroy,
          Sr., John B. Kilroy, Jr. and Kilroy Industries(1)

 10.5    1998 Stock Option and Incentive Plan of the Registrant and Kilroy
          Realty, L.P(1)

 10.6    Form of Indemnity Agreement of the Registrant and Kilroy Realty, L.P.
          with certain officers and directors(1)

 10.7    Lease Agreement, dated January 24, 1989, by and between Kilroy Long
          Beach Associates and the City of Long Beach for Kilroy Long Beach
          Phase I(1)

 10.8    First Amendment to Lease Agreement, dated December 28, 1990, by and
          between Kilroy Long Beach Associates and the City of Long Beach for
          Kilroy Long Beach Phase I(1)

 10.9    Lease Agreement, dated July 17, 1985, by and between Kilroy Long Beach
          Associates and the City of Long Beach for Kilroy Long Beach Phase
          III(1)

 10.10   Lease Agreement, dated April 21, 1988, by and between Kilroy Long
          Beach Associates and the Board of Water Commissioners of the City of
          Long Beach, acting for and on behalf of the City of Long Beach, for
          Long Beach Phase IV(1)

 10.11   Lease Agreement, dated December 30, 1988, by and between Kilroy Long
          Beach Associates and City of Long Beach for Kilroy Long Beach Phase
          II(1)

 10.12   First Amendment to Lease, dated January 24, 1989, by and between
          Kilroy Long Beach Associates and the City of Long Beach for Kilroy
          Long Beach Phase III(1)

 10.13   Second Amendment to Lease Agreement, dated December 28, 1990, by and
          between Kilroy Long Beach Associates and the City of Long Beach for
          Kilroy Long Beach Phase III(1)

 10.14   First Amendment to Lease Agreement, dated December 28, 1990, by and
          between Kilroy Long Beach Associates and the City of Long Beach for
          Kilroy Long Beach Phase II(1)

 10.15   Third Amendment to Lease Agreement, dated October 10, 1994, by and
          between Kilroy Long Beach Associates and the City of Long Beach for
          Kilroy Long Beach Phase III(1)

 10.16   Development Agreement by and between Kilroy Long Beach Associates and
          the City of Long Beach(1)

 10.17   Amendment No. 1 to Development Agreement by and between Kilroy Long
          Beach Associates and the City of Long Beach(1)

 10.18   Ground Lease by and between Frederick Boysen and Ted Boysen and Kilroy
          Industries, dated May 15, 1969, for SeaTac Office Center(1)

 10.19   Amendment No. 1 to Ground Lease and Grant of Easement, dated April 27,
          1973, among Frederick Boysen and Dorothy Boysen, Ted Boysen and Rose
          Boysen and Sea/Tac Properties(1)
</TABLE>


                                       51
<PAGE>

<TABLE>
<CAPTION>
 Exhibit
 Number                                Description
 -------                               -----------
 <C>     <S>
 10.20   Amendment No. 2 to Ground Lease and Grant of Easement, dated May 17,
          1977, among Frederick Boysen and Dorothy Boysen, Ted Boysen and Rose
          Boysen and Sea/Tac Properties(1)

 10.21   Airspace Lease, dated July 10, 1980, by and among the Washington State
          Department of Transportation, as lessor, and Sea Tac Properties, Ltd.
          and Kilroy Industries, as lessee(1)

 10.22   Lease, dated April 1, 1980, by and among Bow Lake, Inc., as lessor,
          and Kilroy Industries and SeaTac Properties, Ltd., as lessees for
          Sea/Tac Office Center(1)

 10.23   Amendment No. 1 to Ground Lease, dated September 17, 1990, between Bow
          Lake, Inc., as lessor, and Kilroy Industries and Sea/Tac Properties,
          Ltd., as lessee(1)

 10.24   Amendment No. 2 to Ground Lease, dated March 21, 1991, between Bow
          Lake, Inc., as lessor, and Kilroy Industries and Sea/Tac Properties,
          Ltd., as lessee(1)

 10.25   Property Management Agreement between Kilroy Realty Finance
          Partnership, L.P. and Kilroy Realty, L.P.(1)

 10.26   Environmental Indemnity Agreement(1)

 10.27   Option Agreement by and between Kilroy Realty, L.P. and Kilroy Airport
          Imperial Co.(1)

 10.28   Option Agreement by and between Kilroy Realty, L.P. and Kilroy
          Calabasas Associates(1)

 10.29   Employment Agreement between the Registrant and John B. Kilroy, Jr.(1)

 10.30   Employment Agreement between the Registrant and Richard E. Moran Jr.(1)

 10.31   Employment Agreement between the Registrant and Jeffrey C. Hawken(1)

 10.32   Employment Agreement between the Registrant and C. Hugh Greenup(1)

 10.33   Noncompetition Agreement by and between the Registrant and John B.
          Kilroy, Sr.(1)

 10.34   Noncompetition Agreement by and between the Registrant and John B.
          Kilroy, Jr.(1)

 10.35   License Agreement by and among the Registrant and the other persons
          named therein(1)

 10.36   Form of Indenture of Mortgage, Deed of Trust, Security Agreement,
          Financing Statement, Fixture Filing and Assignment of Leases, Rents
          and Security Deposits(1)

 10.37   Mortgage Note(1)

 10.38   Indemnity Agreement(1)

 10.39   Assignment of Leases, Rents and Security Deposits(1)

 10.40   Variable Interest Rate Indenture of Mortgage, Deed of Trust, Security
          Agreement, Financing Statement, Fixture Filing and Assignment of
          Leases and Rents(1)

 10.41   Environmental Indemnity Agreement(1)

 10.42   Assignment, Rents and Security Deposits(1)

 10.43   Form of Mortgage, Deed of Trust, Security Agreement, Financing
          Statement, Fixture Filing and Assignment of Leases and Rents(1)

 10.44   Assignment of Leases, Rents and Security Deposits(1)

 10.45   Purchase and Sale Agreement and Joint Escrow Instructions, dated April
          30, 1998, by and between Mission Land Company, Mission-Vacaville,
          L.P. and Kilroy Realty, L.P.(2)

 10.46   Agreement of Purchase and Sale and Joint Escrow Instructions, dated
          April 30, 1998, by and between Camarillo Partners and Kilroy Realty,
          L.P.(2)

 10.47   Purchase and Sale Agreement and Escrow Instructions, dated May 5,
          1998, by and between Kilroy Realty, L.P. and Pullman Carnegie
          Associates(4)

 10.48   Amendment to Purchase and Sale Agreement and Escrow Instructions,
          dated June 27, 1998, by and between Pullman Carnegie Associates and
          Kilroy Realty, L.P.(4)
</TABLE>


                                       52
<PAGE>

<TABLE>
<CAPTION>
 Exhibit
 Number                                Description
 -------                               -----------
 <C>     <S>
 10.49   Purchase and Sale Agreement, Contribution Agreement and Joint Escrow
          Instructions, dated May 12, 1998, by and between Shidler West
          Acquisition Company, LLC and Kilroy Realty, L.P.(3)

 10.50   First Amendment to Purchase and Sale Agreement, Contribution Agreement
          and Joint Escrow Instructions, dated June 6, 1998, between Kilroy
          Realty, L.P. and Shidler West Acquisition Company, L.L.C. and Kilroy
          Realty, L.P.(3)

 10.51   Second Amendment to Purchase and Sale Agreement, Contribution
          Agreement and Joint Escrow Instructions, dated June 12, 1998, by and
          between Shidler West Acquisition Company, LLC and Kilroy Realty,
          L.P.(3)

 10.52   Agreement of Purchase and Sale and Joint Escrow Instructions, dated
          June 12, 1998, by and between Mazda Motor of America, Inc. and Kilroy
          Realty, L.P.(4)

 10.53   Amendment to Agreement of Purchase and Sale and Joint Escrow
          Instructions, dated June 30, 1998, by and between Mazda Motor of
          America, Inc. and Kilroy Realty, L.P.(4)

 10.54   Agreement for Purchase and Sale of 2100 Colorado Avenue, Santa Monica,
          California, dated June 16, 1998, by and between Santa Monica Number
          Seven Associates L.P. and Kilroy Realty L.P.(4)

 10.55   Second Amendment to Credit Agreement and First Amendment to Variable
          Interest Rate Indenture of Mortgage, Deed of Trust, Security
          Agreement, Financing Statement, Fixture Filing and Assignment of
          Leases and Rent dated August 13, 1998(5)

 10.56   Purchase and Sale Agreement and Joint Escrow Instructions, dated July
          10, 1998, by and between Kilroy Realty, L.P. and Mission Square
          Partners(6)

 10.57   First Amendment to the Purchase and Sale Agreement and Joint Escrow
          Instructions, dated July 10, 1998, by and between Kilroy Realty, L.P.
          and Mission Square Partners, dated August 22, 1998(6)

 10.58   Second Amendment to the Purchase and Sale Agreement and Joint Escrow
          Instructions, dated July 10, 1998, by and between Kilroy Realty, L.P.
          and Mission Square Partners, dated September 5, 1998(6)

 10.59   Third Amendment to the Purchase and Sale Agreement and Joint Escrow
          Instructions, dated July 10, 1998, by and between Kilroy Realty, L.P.
          and Mission Square Partners, dated September 19, 1998(6)

 10.60   Fourth Amendment to the Purchase and Sale Agreement and Joint Escrow
          Instructions, dated July 10, 1998, by and between Kilroy Realty, L.P.
          and Mission Square Partners, dated September 22, 1998(6)

 10.61   Fifth Amendment to the Purchase and Sale Agreement and Joint Escrow
          Instructions, dated July 10, 1998, by and between Kilroy Realty, L.P.
          and Mission Square Partners, dated September 23, 1998(6)

 10.62   Sixth Amendment to the Purchase and Sale Agreement and Joint Escrow
          Instructions, dated July 10, 1998, by and between Kilroy Realty, L.P.
          and Mission Square Partners, dated September 25, 1998(6)

 10.63   Seventh Amendment to the Purchase and Sale Agreement and Joint Escrow
          Instructions, dated July 10, 1998, by and between Kilroy Realty, L.P.
          and Mission Square Partners, dated September 29, 1998(6)

 10.64   Eighth Amendment to the Purchase and Sale Agreement and Joint Escrow
          Instructions, dated July 10, 1998, by and between Kilroy Realty, L.P.
          and Mission Square Partners, dated October 2, 1998(6)

 10.65   Ninth Amendment to the Purchase and Sale Agreement and Joint Escrow
          Instructions, dated July 10, 1998, by and between Kilroy Realty, L.P.
          and Mission Square Partners, dated October 24, 1998(6)

 10.66   Contribution Agreement, dated October 21, 1998, by and between Kilroy
          Realty, L.P. and Kilroy Realty Corporation and The Allen Group and
          the Allens(8)
</TABLE>


                                       53
<PAGE>

<TABLE>
<CAPTION>
 Exhibit
 Number                                Description
 -------                               -----------
 <C>     <S>
  10.67  Purchase and Sale Agreement and Escrow Instructions, dated December
          11, 1998, by and between Kilroy Realty, L.P. and Swede-Cal
          Properties, Inc., Viking Investors of Southern California, L.P. and
          Viking Investors of Southern California II, L.P.(9)

  10.68  Amendment to the Contribution Agreement, dated October 14, 1999, by
          and between Kilroy Realty, L.P. and Kilroy Realty Corporation and The
          Allen Group and the Allens, dated October 21, 1998(15)

  10.69  Amended and Restated Revolving Credit Agreement, dated as of October
          8, 1999 among Kilroy Realty, L.P., Morgan Guaranty Trust Company of
          New York, as Bank and as Lead Agent for the Banks, and the Banks
          listed therein.(14)

  10.70  Amended and Restated Guaranty of Payment, dated as of October 8, 1999,
          between Kilroy Realty Corporation and Morgan Guaranty Trust Company
          of New York.(14)

  10.71  Promissory Notes Aggregating $95.0 Million Payable to Teachers
          Insurance and Annuity Association of America(18)

  10.72  Form of Deed of Trust, Assignment of Leases and Rents, Security
          Agreement and Fixture Filing Statement Securing Promissory Notes
          Payable to Teachers Insurance and Annuity Association of America(18)

  10.73  Second Amended and Restated Revolving Credit Agreement and Form of
          Notes Aggregating $400 million(19)

  10.74  Second Amended and Restated Guaranty of Payment(19)

  10.75  Credit Agreement and Form of Promissory Notes Aggregating $90.0
          million(19)

  10.76  Variable Interest Rate Deed of Trust, Leasehold Deed of Trust,
          Assignment of Rents, Security Agreement and Fixture Filing(19)

  10.77  Guaranty of Recourse Obligations of Borrowing(19)

 *10.78  First Amendment to Fourth Amended and Restated Agreement of Limited
          Partnership of Kilroy Realty, L.P., dated December 9, 1999

  21.1   List of Subsidiaries of the Registrant(17)

 *23.1   Consent of Deloitte & Touche LLP

 *24.1   Power of Attorney (included in the signature page of this Form 10-K)

 *27.1   Financial Data Schedule
</TABLE>
- --------
 *  Filed herewith

**  Previously filed

 (1) Previously filed as an exhibit to the Registration Statement on Form S-11
     (No. 333-15553) as declared effective in January 28, 1998 and
     incorporated herein by reference.

 (2) Previously filed as exhibit 10.11 and 10.12, respectively, to the Current
     Report on Form 8-K, dated May 22, 1998, and incorporated herein by
     reference.

 (3) Previously filed as exhibit 10.57, 10.58 and 10.59, respectively, to the
     Current Report on Form 8-K, dated June 30, 1998, and incorporated herein
     by reference.

 (4) Previously filed as exhibit 10.54, 10.59, 10.60, 10.61 and 10.62,
     respectively, to the Current Report on Form 8-K, dated June 30, 1998, and
     incorporated herein by reference.

 (5) Previously filed as an exhibit to the Registration Statement on Form S-11
     (No. 333-32261), and incorporated herein by reference.

                                      54
<PAGE>

 (6) Previously filed as an exhibit on Form 10-Q, for the quarterly period
     ended September 30, 1998, and incorporated herein by reference.

 (7) Previously filed as an exhibit to the Current Report on Form 8-K/A, dated
     October 29, 1998, and incorporated herein by reference.

 (8) Previously filed as exhibit 10.70 and 10.71, respectively, to the Current
     Report on Form 8-K, dated November 7, 1998, and incorporated herein by
     reference.

 (9) Previously filed as exhibit 10.70 to the Current Report on Form 8-K,
     dated December 17, 1998, and incorporated herein by reference.

(10) Previously filed as an exhibit to the Registrant's Current Report on Form
     8-K dated February 6, 1999 and incorporated herein by reference.

(11) Previously filed as an exhibits to the Current Report on Form 8-K (No. 1-
     12675) dated October 2, 1999 and incorporated herein by reference.

(12) Previously filed as an exhibit to the Current Report on Form 8-K (No. 1-
     12675) dated October 29, 1998 and incorporated herein by reference.

(13) Previously filed as an exhibit to the Current Report on Form 8-K (No. 1-
     12675) dated April 20, 1999 and incorporated herein by reference.

(14) Previously filed as an exhibit on Form 10-Q (No. 1-12675) for the
     quarterly period ended September 30, 1999 and incorporated herein by
     reference.

(15) Previously filed as an exhibit to the Current Report on Form 8-K (No. 1-
     12675) dated November 24, 1999 and incorporated herein by reference.

(16) Previously filed as an exhibit to the Current Report on Form 8-K (No. 1-
     12675) dated October 2, 1999 and incorporated herein by reference.

(17) Previously filed as an exhibit to the Registration Statement on Form S-11
     (No. 333-15553) and incorporated herein by reference.

(18) Previously filed as an exhibit on Form 10-Q, for the quarterly period
     ended March 31, 1999, and incorporated herein by reference.

(19) Previously filed as an exhibit on Form 10-Q, for the quarterly period
     ended September 30, 1999, and incorporated herein by reference.

   (b) Reports on Form 8K

   The Company filed the Current Report on Form 8-K (No. 1-12675) dated
December 9, 1999 in connection with the announcement of the Company's up to
3.0 million share repurchase program.

                                      55
<PAGE>

                                  SIGNATURES

   Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed
on its behalf by the undersigned, thereunto duly authorized on March 16, 2000.

                                          Kilroy Realty Corporation

                                                /s/ John B. Kilroy, Jr.
                                          By: _________________________________
                                                    John B. Kilroy, Jr.
                                               President and Chief Executive
                                                          Officer

                               POWER OF ATTORNEY

   KNOW ALL MEN BY THESE PRESENTS, that we, the undersigned officers and
directors of Kilroy Realty Corporation, hereby severally constitute John B.
Kilroy, Sr., John B. Kilroy, Jr., Jeffrey C. Hawken, Richard E. Moran Jr. and
Ann Marie Whitney, and each of them singly, our true and lawful attorneys with
full power to them, and each of them singly, to sign for us and in our names
in the capacities indicated below, the Form 10-K filed herewith and any and
all amendments to said Form 10-K, and generally to do all such things in our
names and in our capacities as officers and directors to enable Kilroy Realty
Corporation to comply with the provisions of the Securities Exchange Act of
1934, and all requirements of the Securities and Exchange Commission, hereby
ratifying and confirming our signatures as they may be signed by our said
attorneys, or any of them, to said Form 10-K and any and all amendments
thereto.

   Pursuant to the requirements of the Securities Exchange Act of 1934, this
report has been signed below by the following persons on behalf of the
registrant and in the capacities and on the dates indicated.

<TABLE>
<CAPTION>
                 Name                           Title                 Date
                 ----                           -----                 ----

 <C>                                  <S>                        <C>
     /s/ John B. Kilroy, Sr.          Chairman of the Board      March 16, 2000
 ____________________________________
         John B. Kilroy, Sr.

     /s/ John B. Kilroy, Jr.          President, Chief           March 16, 2000
 ____________________________________  Executive Officer and
         John B. Kilroy, Jr.           Director (Principal
                                       Executive Officer)

     /s/ Richard E. Moran Jr.         Executive Vice President   March 16, 2000
 ____________________________________  and Chief Financial
         Richard E. Moran Jr.          Officer (Principal
                                       Financial Officer)

      /s/ Ann Marie Whitney           Vice President and         March 16, 2000
 ____________________________________  Controller (Principal
          Ann Marie Whitney            Accounting Officer)

       /s/ John R. D'Eathe            Director                   March 16, 2000
 ____________________________________
           John R. D'Eathe
</TABLE>

                                      56
<PAGE>

<TABLE>
<CAPTION>
                 Name                   Title         Date
                 ----                   -----         ----

 <C>                                  <S>        <C>
      /s/ William P. Dickey           Director   March 16, 2000
 ____________________________________
          William P. Dickey

       /s/ Matthew J. Hart            Director   March 16, 2000
 ____________________________________
           Matthew J. Hart

       /s/ Dale F. Kinsella           Director   March 16, 2000
 ____________________________________
           Dale F. Kinsella
</TABLE>

                                       57
<PAGE>

        KILROY REALTY CORPORATION CONSOLIDATED AND KILROY GROUP COMBINED

             FINANCIAL STATEMENTS AS OF DECEMBER 31, 1999 AND 1998
                       AND FOR THE THREE YEARS THEN ENDED

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                          Page
                                                                          ----
<S>                                                                       <C>
Independent Auditors' Report............................................   F-2

Consolidated Balance Sheets as of December 31, 1999 and 1998............   F-3

Consolidated Statements of Operations for the years ended December 31,
 1999 and 1998 and the period February 1, 1997 to December 31, 1997 and
 Combined Statement of Operations for the period January 1, 1997 to
 January 31, 1997.......................................................   F-4

Consolidated Statements of Stockholders' Equity for the years ended
 December 31, 1999 and 1998 and the period February 1, 1997 to December
 31, 1997...............................................................   F-5

Combined Statement of Accumulated Deficit for the period January 1, 1997
 to January 31, 1997....................................................   F-6

Consolidated Statements of Cash Flows for the years ended December 31,
 1999 and 1998 and Combined Statement of Cash Flows for the year ended
 December 31, 1997......................................................   F-7

Notes to Consolidated and Combined Financial Statements.................   F-8
</TABLE>

                                      F-1
<PAGE>

                         INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Stockholders of Kilroy Realty Corporation:

   We have audited the accompanying consolidated balance sheets of Kilroy
Realty Corporation (the "Company") as of December 31, 1999 and 1998, the
related consolidated statements of operations and shareholders' equity for the
years ended December 31, 1999 and 1998 and the period February 1, 1997 to
December 31, 1997, and the combined statements of operations and accumulated
deficit of the Kilroy Group (described in Note 1) for the period January 1,
1997 to January 31, 1997; and the consolidated statements of cash flows for
the years ended December 31, 1999 and 1998 and the combined statement of cash
flows for the year ended December 31, 1997. Our audits also included the
financial statement schedule listed in the index at Item 8. These financial
statements and the financial statement schedule are the responsibility of the
management of the Company. Our responsibility is to express an opinion on
these financial statements and the financial statement schedule based on our
audits.

   We conducted our audits in accordance with auditing standards generally
accepted in the United States of America. Those standards require that we plan
and perform the audits to obtain reasonable assurance about whether the
financial statements are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements. An audit also includes assessing the accounting
principles used and significant estimates made by management, as well as
evaluating the overall financial statement presentation. We believe that our
audits provide a reasonable basis for our opinion.

   In our opinion, such financial statements present fairly, in all material
respects, the financial position of the Company as of December 31, 1999 and
1998, and the results of operations and cash flows of the Company and the
Kilroy Group for the respective stated periods in conformity with accounting
principles generally accepted in the United States of America. Also in our
opinion, such financial statement schedule, when considered in relation to the
basic consolidated and combined financial statements taken as a whole,
presents fairly in all material respects, the information set forth therein.

/s/ Deloitte & Touche LLP

Los Angeles, California
March 10, 2000


                                      F-2
<PAGE>

                           KILROY REALTY CORPORATION

                          CONSOLIDATED BALANCE SHEETS
                       (in thousands, except share data)

<TABLE>
<CAPTION>
                                                            December 31,
                                                        ----------------------
                                                           1999        1998
                                                        ----------  ----------
<S>                                                     <C>         <C>
                        ASSETS
                        ------

INVESTMENT IN REAL ESTATE (Notes 2, 3, 6, 13, 15, 19,
 and 20):
  Land and improvements................................ $  274,463  $  253,500
  Buildings and improvements...........................    946,130     828,425
  Undeveloped land and construction in progress, net...    189,645     112,359
                                                        ----------  ----------
    Total investment in real estate....................  1,410,238   1,194,284
  Accumulated depreciation and amortization............   (174,427)   (145,437)
                                                        ----------  ----------
    Investment in real estate, net.....................  1,235,811   1,048,847
CASH AND CASH EQUIVALENTS..............................     26,116       6,443
RESTRICTED CASH........................................      6,636       6,896
TENANT RECEIVABLES, NET (Note 4).......................     22,078      18,919
NOTES RECEIVABLE FROM RELATED PARTIES (Note 13)........                  8,798
DEFERRED FINANCING AND LEASING COSTS, NET (Note 5).....     27,840      16,168
PREPAID EXPENSES AND OTHER ASSETS......................      2,020       3,146
                                                        ----------  ----------
    TOTAL ASSETS....................................... $1,320,501  $1,109,217
                                                        ==========  ==========
         LIABILITIES AND STOCKHOLDERS' EQUITY
         ------------------------------------
LIABILITIES:
  Mortgage debt (Note 6)............................... $  325,516  $  133,383
  Unsecured line of credit (Note 7)....................    228,000     272,000
  Accounts payable and accrued expenses................     26,260      16,791
  Accrued distributions (Note 9).......................     13,456      12,895
  Rents received in advance and tenant security
   deposits............................................     20,287      17,749
                                                        ----------  ----------
    Total liabilities..................................    613,519     452,818
                                                        ----------  ----------

COMMITMENTS AND CONTINGENCIES (Notes 12 and 13)

MINORITY INTERESTS (Note 8):
  8.075% Series A Cumulative Redeemable Preferred
   unitholders.........................................     73,716      73,718
  9.375% Series C Cumulative Redeemable Preferred
   unitholders.........................................     34,464      34,410
  9.250% Series D Cumulative Redeemable Preferred
   unitholders.........................................     44,022
  Common unitholders of the Operating Partnership......     71,920      72,372
  Minority interest in Development LLCs................      9,931
                                                        ----------  ----------
    Total minority interests...........................    234,053     180,500
                                                        ----------  ----------
STOCKHOLDERS' EQUITY (Note 9):
  Preferred stock, $.01 par value, 28,300,000 shares
   authorized,
   none issued and outstanding.........................
  8.075% Series A Cumulative Redeemable Preferred
   stock, $.01 par value, 1,700,000 shares authorized,
   none issued and outstanding.........................
  Series B Junior Participating Preferred stock, $.01
   par value,
   400,000 shares authorized, none issued and
   outstanding.........................................
  9.375% Series C Cumulative Redeemable Preferred
   stock, $.01 par value, 700,000 shares authorized,
   none issued and outstanding.........................
  9.250% Series D Cumulative Redeemable Preferred
   stock, $.01 par value, 1,000,000 shares authorized,
   none issued and outstanding.........................
  Common stock, $.01 par value, 150,000,000 shares
   authorized,
   27,808,410, and 27,639,210 shares issued and
   outstanding, respectively...........................        278         276
  Additional paid-in capital...........................    491,204     487,467
  Distributions in excess of earnings..................    (18,553)    (11,844)
                                                        ----------  ----------
    Total stockholders' equity.........................    472,929     475,899
                                                        ----------  ----------
    TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY......... $1,320,501  $1,109,217
                                                        ==========  ==========
</TABLE>
   See accompanying notes to consolidated and combined financial statements.


                                      F-3
<PAGE>

                   KILROY REALTY CORPORATION CONSOLIDATED AND
                             KILROY GROUP COMBINED

                            STATEMENTS OF OPERATIONS
                (in thousands, except share and per share data)

<TABLE>
<CAPTION>
                                      Kilroy Realty Corporation        Kilroy Group
                                -------------------------------------- ------------
                                                          February 1,   January 1,
                                 Year Ended   Year Ended    1997 to      1997 to
                                December 31, December 31, December 31, January 31,
                                    1999         1998         1997         1997
                                ------------ ------------ ------------ ------------
<S>                             <C>          <C>          <C>          <C>
REVENUES (Note 15):
  Rental income...............   $  140,182   $  117,338   $   56,069     $2,760
  Tenant reimbursements.......       16,316       14,956        6,751        306
  Interest income.............        1,175        1,698        3,571
  Other income (Note 2).......        2,027        3,096          889         18
                                 ----------   ----------   ----------     ------
    Total revenues............      159,700      137,088       67,280      3,084
                                 ----------   ----------   ----------     ------
EXPENSES:
  Property expenses (Note
   15)........................       20,669       19,281        8,770        579
  Real estate taxes (Note
   15)........................       12,369       10,383        4,199        137
  General and administrative
   expenses...................        9,091        7,739        4,949         78
  Ground leases (Note 15).....        1,397        1,223          938         64
  Provision for potentially
   unrecoverable pre-
   development costs (Note 2)..                    1,700
  Development expense.........                                                46
  Interest expense............       26,309       20,568        9,738      1,895
  Depreciation and
   amortization...............       33,794       26,200       13,236        787
                                 ----------   ----------   ----------     ------
    Total expenses............      103,629       87,094       41,830      3,586
                                 ----------   ----------   ----------     ------
INCOME (LOSS) BEFORE GAINS ON
 DISPOSITIONS OF OPERATING
 PROPERTIES, EQUITY IN INCOME
 OF UNCONSOLIDATED SUBSIDIARY,
 MINORITY INTERESTS AND
 EXTRAORDINARY GAINS..........       56,071       49,994       25,450       (502)
GAINS ON DISPOSITIONS OF
 OPERATING PROPERTIES.........           46
EQUITY IN INCOME OF
 UNCONSOLIDATED SUBSIDIARY....           17            5           23
                                 ----------   ----------   ----------     ------
INCOME (LOSS) BEFORE MINORITY
 INTERESTS AND EXTRAORDINARY
 GAINS........................       56,134       49,999       25,473       (502)

MINORITY INTERESTS:
  Distributions on Cumulative
   Redeemable Preferred
   units......................       (9,560)      (5,556)
  Minority interest in
   earnings of Operating
   Partnership................       (6,480)      (5,621)      (3,413)
  Minority interest in
   earnings of Development
   LLCs.......................         (199)
                                 ----------   ----------   ----------     ------
    Total minority interests..      (16,239)     (11,177)      (3,413)
                                 ----------   ----------   ----------     ------
INCOME (LOSS) BEFORE
 EXTRAORDINARY GAINS..........       39,895       38,822       22,060       (502)
EXTRAORDINARY GAINS (Note 2)..                                             3,204
                                 ----------   ----------   ----------     ------
NET INCOME....................   $   39,895   $   38,822   $   22,060     $2,702
                                 ==========   ==========   ==========     ======
Net income per common share--
 basic (Note 16)..............   $     1.44   $     1.44   $     1.20
                                 ==========   ==========   ==========
Net income per common share--
 diluted (Note 16)............   $     1.44   $     1.43   $     1.19
                                 ==========   ==========   ==========
Weighted average shares
 outstanding--basic (Note
 16)..........................   27,701,495   26,989,422   18,445,149
                                 ==========   ==========   ==========
Weighted average shares
 outstanding--diluted
 (Note 16) ...................   27,727,303   27,059,988   18,539,299
                                 ==========   ==========   ==========
</TABLE>

   See accompanying notes to consolidated and combined financial statements.

                                      F-4
<PAGE>

                     KILROY REALTY CORPORATION CONSOLIDATED

                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

               Two Years Ended December 31, 1999 and 1998 and the
                  Period February 1, 1997 to December 31, 1997
                (in thousands, except share and per share data)

<TABLE>
<CAPTION>
                                            Additional Distributions
                         Number of   Common  Paid-in   in Excess of
                           Shares    Stock   Capital     Earnings      Total
                         ----------  ------ ---------- ------------- ---------
<S>                      <C>         <C>    <C>        <C>           <C>
BALANCE AT FEBRUARY 1,
 1997...................         50          $      1    $(104,540)  $(104,539)
  Issuance of common
   stock................ 24,375,000   $244    438,894      104,540     543,678
  Issuance of restricted
   stock (Note 11)......    100,000      1                                   1
  Restricted stock
   compensation (Note
   11)..................                          422                      422
  Repurchase of common
   stock................        (50)               (1)                      (1)
  Adjustment for
   minority interest....                      (36,153)                 (36,153)
  Dividends declared
   ($1.42 per share)....                                   (28,318)    (28,318)
  Net income............                                    22,060      22,060
                         ----------   ----   --------    ---------   ---------
BALANCE AT DECEMBER 31,
 1997................... 24,475,000    245    403,163       (6,258)    397,150
  Issuance of common
   stock (Note 9).......  3,174,210     31     81,782                   81,813
  Restricted stock
   compensation (Note
   11)..................                          531                      531
  Repurchase of common
   stock................    (10,000)             (285)                    (285)
  Adjustment for
   minority interest....                        2,276                    2,276
  Dividends declared
   ($1.62 per share)....                                   (44,408)    (44,408)
  Net income............                                    38,822      38,822
                         ----------   ----   --------    ---------   ---------
BALANCE AT DECEMBER 31,
 1998................... 27,639,210    276    487,467      (11,844)    475,899
  Conversion of common
   units of the
   Operating Partnership
   (Note 9).............    444,200      4    (15,644)                 (15,640)
  Restricted stock
   compensation (Note
   11)..................                          508                      508
  Repurchase of common
   stock (Note 9).......   (275,000)    (2)    (5,564)                  (5,566)
  Adjustment for
   minority interest....                       24,437                   24,437
  Dividends declared
   ($1.68 per share)....                                   (46,604)    (46,604)
  Net income............                                    39,895      39,895
                         ----------   ----   --------    ---------   ---------
BALANCE AT DECEMBER 31,
 1999................... 27,808,410   $278   $491,204    $ (18,553)  $ 472,929
                         ==========   ====   ========    =========   =========
</TABLE>

   See accompanying notes to consolidated and combined financial statements.

                                      F-5
<PAGE>

                                  KILROY GROUP

                   COMBINED STATEMENT OF ACCUMULATED DEFICIT

                      January 1, 1997 to January 31, 1997
                                 (in thousands)

<TABLE>
<S>                                                                  <C>
BALANCE AT DECEMBER 31, 1996........................................ $(113,777)
  Deemed and actual contributions from partners, net of
   distributions....................................................     6,535
  Net income........................................................     2,702
                                                                     ---------
BALANCE AT JANUARY 31, 1997......................................... $(104,540)
                                                                     =========
</TABLE>



   See accompanying notes to consolidated and combined financial statements.

                                      F-6
<PAGE>

        KILROY REALTY CORPORATION CONSOLIDATED AND KILROY GROUP COMBINED

                            STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                   Year Ended December 31,
                                                -------------------------------
                                                  1999       1998       1997
                                                ---------  ---------  ---------
                                                       (in thousands)
<S>                                             <C>        <C>        <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income..................................  $  39,895  $  38,822  $  24,762
  Adjustments to reconcile net income to net
   cash provided by operating activities:
   Depreciation and amortization..............     33,794     26,200     14,023
   Provision for uncollectible tenant
    receivables and unbilled deferred rent....      2,158      1,107      1,078
   Provision for potentially unrecoverable
    pre-development costs.....................                 1,700
   Minority interests in earnings of
    Operating Partnership and Development
    LLCs .....................................      6,679      5,621      3,413
   Restricted stock compensation..............        508        531        422
   Gains on dispositions of operating
    properties and undeveloped land...........       (585)
   Extraordinary gains........................                           (3,204)
   Other, net.................................       (216)      (281)       (23)
   Changes in assets and liabilities:
     Tenant receivables.......................     (5,317)    (9,370)    (5,403)
     Deferred leasing costs...................     (4,808)    (2,652)    (4,819)
     Prepaid expenses and other assets........       (698)     1,483     (3,654)
     Accounts payable and accrued expenses....     10,392      7,455      2,097
     Accrued cost of option buy-out and
      tenant improvements.....................                           (1,390)
     Rents received in advance and tenant
      security deposits.......................      2,538      1,719      1,626
     Accrued distributions on Cumulative
      Redeemable Preferred units..............        295      1,094
                                                ---------  ---------  ---------
       Net cash provided by operating
        activities............................     84,635     73,429     28,928
                                                ---------  ---------  ---------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Expenditures for operating properties.......    (43,159)  (242,287)  (512,071)
  Expenditures for undeveloped land and
   construction in progress...................   (178,244)   (98,438)   (34,671)
  Proceeds from dispositions of operating
   properties.................................     22,612
  Proceeds from dispositions of undeveloped
   land.......................................      5,051
  Notes receivable from related parties.......                (8,798)
  Decrease (increase) in escrow deposits......        350      4,764     (5,114)
  Net investment in and advances from (to)
   unconsolidated subsidiary..................        595      1,042       (100)
                                                ---------  ---------  ---------
       Net cash used in investing activities..   (192,795)  (343,717)  (551,956)
                                                ---------  ---------  ---------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Net proceeds from issuance of common stock..                81,813    543,678
  Repurchases of common stock.................     (5,350)
  Net proceeds from issuance of Cumulative
   Redeemable Preferred units.................     43,779    107,034
  Proceeds from issuance of mortgage debt.....    215,000      5,000     98,000
  Net (repayments) borrowings on line of
   credit.....................................    (44,000)   130,000    142,000
  Principal payments on mortgage debt.........    (22,867)    (2,979)  (226,549)
  Financing costs.............................     (5,392)    (3,007)    (4,325)
  Decrease (increase) in restricted cash......        260     (1,216)    (5,680)
  Distributions paid..........................    (53,597)   (48,843)   (21,702)
  Deemed and actual contributions from
   partners, net..............................                            6,535
                                                ---------  ---------  ---------
       Net cash provided by financing
        activities............................    127,833    267,802    531,957
                                                ---------  ---------  ---------
Net increase (decrease) in cash and cash
 equivalents..................................     19,673     (2,486)     8,929
Cash and cash equivalents, beginning of year..      6,443      8,929
                                                ---------  ---------  ---------
Cash and cash equivalents, end of year........  $  26,116  $   6,443  $   8,929
                                                =========  =========  =========
SUPPLEMENTAL CASH FLOW INFORMATION:
  Cash paid for interest, net of capitalized
   interest...................................  $  25,035  $  18,442  $  13,095
                                                =========  =========  =========
  Distributions paid to Cumulative Redeemable
   Preferred unitholders .....................  $   9,265  $   4,462
                                                =========  =========
NON-CASH TRANSACTIONS:
  Accrual of distributions payable (Note 9)...  $  13,456  $  12,895  $  10,804
                                                =========  =========  =========
  Issuance of common limited partnership units
   of the Operating Partnership to acquire
   operating properties and undeveloped land
   (Notes 3 and 13)...........................  $   9,915  $  20,569  $  19,263
                                                =========  =========  =========
  Minority interest recorded in connection
   with Development LLCs undeveloped land
   acquisitions (Notes 3, 8 and 13)...........  $   9,732
                                                =========
  Note receivable from related parties repaid
   in connection with operating property
   acquisition (Note 13)......................  $   2,267
                                                =========
  Note receivable from related parties
   satisfied in connection with Development
   LLCs undeveloped land acquisitions (Note
   13)........................................  $   6,531
                                                =========
  Issuance of mortgage debt to acquire
   operating properties.......................                        $  41,102
                                                                      =========
</TABLE>

   See accompanying notes to consolidated and combined financial statements.

                                      F-7
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

            NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS

                      Three Years Ended December 31, 1999

1. Organization and Ownership

   Kilroy Realty Corporation (the "Company") develops, owns, and operates
office and industrial real estate located in California, Washington, Nevada
and Arizona. The Company, which qualifies and operates as a self-administered
real estate investment trust ("REIT") under the Internal Revenue Code of 1986,
as amended, commenced operations upon the completion of its initial public
offering in January 1997.

   As of December 31, 1999, the Company's stabilized portfolio of operating
properties consisted of 84 office buildings (the "Office Properties") and 87
industrial buildings (the "Industrial Properties," and together with the
Office Properties, the "Properties") which encompassed approximately 6.1
million and 6.5 million rentable square feet, respectively, and was 96.7%
occupied. The Company's stabilized portfolio consists of all of the Company's
Office and Industrial Properties, excluding properties recently developed by
the Company that have not yet reached 95.0% occupancy ("lease-up" properties)
and projects currently under construction or in pre-development. As of
December 31, 1999, the Company had seven office properties under construction
which when completed are expected to encompass an aggregate of approximately
861,500 rentable square feet. The Company did not have any properties in
lease-up at December 31, 1999 since all of the properties developed and
completed by the Company during 1999 and 1998, encompassing an aggregate of
approximately 862,400 and 1.1 million of rentable square feet, respectively,
stabilized during 1999. All but 15 of the Company's properties are located in
Southern California. All of the Company's development projects are located in
Southern California.

   The Company owns its interests in all of its properties through Kilroy
Realty, L.P. (the "Operating Partnership") and Kilroy Realty Finance
Partnership, L.P. (the "Finance Partnership"). The Company conducts
substantially all of its activities through the Operating Partnership in
which, as of December 31, 1999 and 1998, it owned an 86.8% general partnership
interest. The remaining 13.2% limited partnership interest in the Operating
Partnership was owned by certain of the Company's executive officers and
directors, certain of their affiliates, and other outside investors (see Note
8). Kilroy Realty Finance, Inc, ("Finance Inc."), a wholly owned subsidiary of
the Company, is the sole general partner of the Finance Partnership and owns a
1% general partner interest. The Operating Partnership, owns the remaining 99%
limited partner interest.

   In 1998, the Company formed two limited liability companies, Kilroy Gateway
Partners, L.L.C. and Kilroy Carmel Partners, L.L.C. (collectively, the
"Development LLCs") to develop two multi-phased office projects in San Diego,
California. During the first quarter of 1999, the Company, through the
Operating Partnership, became a 50% managing partner in the Development LLCs
as a result of the acquisitions of certain undeveloped land and the
simultaneous contribution of such land to the Development LLCs (see Notes 3
and 13). The Allen Group, a group of affiliated real estate development and
investment companies based in Visalia, California, is the other 50% owner.
Unless otherwise indicated, all references to the Company include the
Operating Partnership, the Finance Partnership, Finance Inc. and the
Development LLCs.

   The Company is the successor to the real estate business of the Kilroy
Group, which consisted of the combination of Kilroy Industries ("KI") and
various entities, the properties of which were under the common control of KI
and/or its stockholders, including the Company's Chairman of the Board of
Directors, John B. Kilroy, Sr., and the Company's President and Chief
Executive Officer, John B. Kilroy, Jr. KI had historically been engaged in the
acquisition, management, financing, construction and leasing of office and
industrial properties and providing development services to third party owners
for a fee. The accompanying combined financial statements of the Kilroy Group
have been presented on a combined basis because of common ownership and
management and because the entities were the subject of a business combination
with the Company in 1997.

                                      F-8
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


2. Basis of Presentation and Significant Accounting Policies

Basis of Presentation:

   The consolidated financial statements of the Company include the
consolidated financial position and results of operations of the Company, the
Operating Partnership, the Finance Partnership and Finance Inc. The
consolidated financial statements as of and for the years ended December 31,
1999 and 1998 also include the consolidated financial position and results of
operations of the Development LLCs. The Development LLCs are consolidated for
financial reporting purposes since the Company holds significant control over
the entities through a 50% managing partner ownership interest, combined with
the ability to control all significant development and operating decisions.
The operating results of the development services business conducted by Kilroy
Services, Inc. ("KSI") are accounted for under the equity method of
accounting. All significant intercompany balances and transactions have been
eliminated in the consolidated financial statements.

   The combined financial statements of the Kilroy Group reflect a combination
of real estate properties which were under the common control of KI and/or its
stockholders, including John B. Kilroy, Sr. and John B. Kilroy, Jr., and which
were contributed to the Operating Partnership upon the consummation of the
IPO. The Kilroy Group is considered the predecessor entity to the Company due
to common ownership and management; therefore, its combined financial
statements are presented for comparative purposes. All significant
intercompany balances and transactions have been eliminated in the combined
financial statements.

Significant Accounting Policies:

   Operating properties--Operating properties are stated at the lower of
historical cost less accumulated depreciation or estimated fair value. The
cost of operating properties includes the purchase price or development costs
of the properties. Costs incurred for the acquisition, renovation and
betterment of the operating properties are capitalized to the Company's
investment in that property. Maintenance and repairs are charged to expense as
incurred. The Company's stabilized portfolio of operating properties consists
of all of the Company's Office and Industrial Properties, excluding properties
recently developed by the Company that have not yet reached 95.0% occupancy
("lease-up" properties) and projects currently under construction or in pre-
development. Lease-up properties are included in land and improvements and
building and improvements on the consolidated balance sheets upon building
shell completion.

   The Company evaluates fair value for financial reporting purposes on a
property by property basis using future undiscounted cash flows, excluding
interest charges. In the event that periodic assessments or other factors
reveal a potential impairment condition, the Company would recognize an
impairment loss to the extent the carrying amount exceeded the fair value of
the property. The Company had not recorded any such impairment losses at
December 31, 1999 and 1998.

   Depreciation and amortization--The cost of buildings and improvements are
depreciated on the straight-line method over estimated useful lives of 25 to
40 years for buildings and the shorter of the lease term or useful life,
ranging from one to 20 years, for tenant improvements. Depreciation expense
for buildings and improvements for the years ended December 31, 1999 and 1998,
the eleven months ended December 31, 1997, and the one month ended January 31,
1997 was $29.0 million, $23.7 million, $11.5 million and $0.7 million,
respectively.

   Construction in progress--Project costs clearly associated with the
development and construction of a real estate project are capitalized as
construction in progress. In addition, interest, real estate taxes and other
costs are capitalized during the period in which activities necessary to get
the property ready for its intended use are in

                                      F-9
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)

progress. Once the development and construction of the building shell of a
real estate project is completed, the costs capitalized to construction in
progress are transferred to land and improvements and buildings and
improvements on the consolidated balance sheets as the historical cost of the
property.

   At December 31, 1999 and 1998, construction in progress was carried net of
a $0.7 million and $1.7 million allowance for potentially unrecoverable pre-
development costs, respectively. The allowance, which provides for costs
incurred for development projects that the Company may at some point in the
development process decide not to pursue, was established by estimating
probable exposures to these types of costs for each of the projects in the
Company's development pipeline. Management's determination of the allowance
was calculated on a project by project basis using a series of probability
factors based on the Company's historical experience. The allowance is
increased by provisions charged against income. The allowance for potentially
unrecoverable pre-development costs at December 31, 1999 and 1998 was
maintained at a level believed to be adequate by management.

   Cash and cash equivalents--The Company considers all money market funds
with an original maturity of three months or less at the date of purchase to
be cash equivalents.

   Restricted cash--Restricted cash consists of cash held as collateral to
provide credit enhancement for the Company's mortgage debt and cash reserves
for property taxes, capital expenditures and tenant improvements.

   Tenant receivables and related revenue recognition--Leases with tenants are
accounted for as operating leases. Minimum annual rentals are recognized on a
straight-line basis over the term of the related lease. Unbilled deferred rent
receivables represent the amount that straight-line rental income exceeds
rents currently due under the lease agreement. Included in tenant receivables
are tenant reimbursements which are comprised of additional amounts receivable
from tenants based on common area maintenance expenses and certain other
expenses that are accrued in the period in which the related expenses are
incurred.

   Tenant receivables and unbilled deferred rent receivables are carried net
of an allowance for uncollectible tenant receivables and unbilled deferred
rent. Management's determination of the adequacy of the allowance is based
upon evaluations of individual receivables, past loss experience, current
economic conditions, and other relevant factors. The allowance is increased by
provisions charged against income. The allowance for uncollectible tenant
receivables and unbilled deferred rent was maintained at a level believed
adequate by management to absorb potential losses from both current and
deferred tenant receivables at December 31, 1999 and 1998.

   Deferred financing and leasing costs--Costs incurred in connection with
debt financing and property leasing are capitalized as deferred financing and
leasing costs. Deferred financing costs include loan fees which are amortized
using the effective interest method over the terms of the respective loans.
Deferred leasing costs include leasing commissions which are amortized on the
straight-line method over the initial lives of the leases which range from one
to 20 years.

   Minority interests--Minority interests represent the preferred and common
limited partnership interests in the Operating Partnership and interests held
by The Allen Group in the Development LLCs (see Note 8).

   Other income--Other income includes revenue earned from lease termination
fees, management fees, and for the year ended December 31, 1999, gains on
dispositions of undeveloped land.

   Extraordinary gains--On January 31, 1997, pursuant to a forbearance
agreement with an insurance company, the Kilroy Group exercised the right to
purchase a mortgage note payable with a principal balance of

                                     F-10
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)

$20.2 million and $2.4 million of accrued interest for $16.1 million. The
forgiveness resulted in an extraordinary gain of $3.2 million including the
write-off of $1.3 million of deferred financing fees.

   Income taxes--The Company believes it qualifies and intends to continue to
qualify as a REIT under Sections 856 through 860 of the Internal Revenue Code
of 1986, as amended (the "Code"), beginning with the taxable year ended
December 31, 1997. As a REIT, the Company is generally not subject to
corporate Federal income taxes so long as it distributes at least 95% of its
taxable income to its stockholders and satisfies certain quarterly
requirements of the Code relating to the composition of its income and assets.
The Company had met all of its REIT distribution and technical requirements at
December 31, 1999, 1998 and 1997. State income tax requirements are
essentially the same as Federal tax requirements.

   Fair value of financial instruments--The Company calculates the fair value
of financial instruments using available market information and appropriate
present value or other valuation techniques. Those techniques are
significantly affected by the assumptions used, including the discount rate
and estimates of future cash flows. In that regard, the derived fair value
estimates cannot be substantiated by comparison to independent markets and in
many cases, could not be realized in immediate settlement of the instrument.
Fair values for certain financial instruments and all non-financial
instruments are not required to be disclosed. Accordingly, the aggregate fair
value amounts presented do not represent the underlying value of the Company
at December 31, 1999 and 1998.

   Derivative financial instruments--The Company's derivative financial
instruments at December 31, 1999 and 1998 consisted of two interest rate cap
agreements with an aggregate notional amount of $150 million. The Company
purchased the interest rate cap agreements to effectively limit interest
expense exposure on borrowings under the Company's floating rate debt
instruments during periods of increasing interest rates.

   The Company's interest rate cap agreements consist of agreements with other
counterparties to receive, at specified intervals and over specified periods
of time, payments equal to the excess, if any, between the hypothetical
interest rate (cap rate) and the then current market rate of interest as
calculated by reference to a specified notional amount and a specified
interest rate index. The only amount the Company is obligated to pay is an
initial premium, which is included in other assets on the consolidated balance
sheets and amortized to interest expense ratably over the shorter of the term
of the cap agreement or the remaining life of the debt instrument the cap
agreement is hedging. At the time the agreements were entered into, the cap
rates exceeded market. The interest rate specified by the agreements have been
and are expected to continue to be highly correlated with the interest rates
on the Company's floating rate debt. Interest payments to be received as a
result of interest rate cap agreements are accrued in other assets and
recognized as a reduction of interest expense related to the designated debt
(the accrual accounting method). There were no payments from the interest rate
cap agreements accrued at December 31, 1999 and 1998.

   Subsequent to December 31, 1999, the Company entered into an interest rate
swap agreement with a notional amount of $150 million and an interest rate cap
agreement with a notional amount of $150 million. Under the Company's swap
agreement the Company will be obligated to pay a fixed interest rate and
receive a floating interest rate as calculated by reference to a specified
interest rate index. The floating interest rate specified by the agreement has
been and is expected to continue to be highly correlated with the floating
interest rates on the Company's floating rate debt. Interest payments to be
paid or received as a result of interest rate swap agreements will be accrued
in accrued expenses on the consolidated balance sheets and recognized as an
adjustment of interest expense related to the designated debt (the accrual
accounting method).


                                     F-11
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


   Use of estimates--The preparation of financial statements in conformity
with generally accepted accounting principles requires management to make
estimates and assumptions that affect the reported amounts of assets and
liabilities and disclosure of contingent assets and liabilities at the date of
the financial statements and the reported amounts of revenues and expenses
during the reported periods. Actual results could differ from those estimates.

   Reclassifications--Certain prior year amounts have been reclassified to
conform to the current year's presentation.

   Concentration of credit risk--156 of the Company's total 171 properties are
located in Southern California. The ability of the tenants to honor the terms
of their respective leases is dependent upon the economic, regulatory and
social factors affecting the communities in which the tenants operate.

   One office property tenant, Hughes Space and Communications, accounted for
approximately 6.4%, 7.4%, and 14.7% of the Company's total base rental
revenues for the years ended December 31, 1999 and 1998, and the eleven months
ended December 31, 1997, respectively. At December 31, 1999 and 1998, the
Company had no outstanding tenant receivables from this tenant.

   The Company has cash in financial institutions which is insured by the
Federal Deposit Insurance Corporation ("FDIC") up to $0.1 million per
institution. At December 31, 1999 and 1998, the Company had cash accounts in
excess of FDIC insured limits.

   Recent accounting pronouncements--In June 1998, the Financial Accounting
Standards Board issued Statement of Financial Accounting Standards No. 133
"Accounting for Derivative Instruments and Hedging Activities" ("SFAS 133").
SFAS 133 is effective for fiscal years beginning after June 15, 2000 and
requires all derivatives to be recorded on the balance sheet at fair value as
either assets or liabilities depending on the rights or obligations under the
contract. SFAS 133 also establishes new accounting methodologies for the
following three classifications of hedges: fair value, cash flow and net
investment in foreign operations. Depending on the nature of the hedge,
changes in fair value of derivatives will either be offset against the change
in fair value of the hedged assets, liabilities, or firm commitments or
recognized in earnings. The ineffective portion of a derivative's change in
fair value will be immediately recognized in earnings. Management believes the
adoption of SFAS 133 will not have a material impact on the Company's
financial position or results of operations.

3. Acquisitions, Dispositions, and Completed Development Projects

 Acquisitions

   During the year ended December 31, 1999, the Company consummated a series
of transactions to acquire three office buildings (see Note 21) and the 12.5%
minority interest in a three-building complex the Company owns in Diamond Bar,
California for an aggregate purchase price of approximately $28.2 million in
cash and 168,402 common units of the Operating Partnership valued at
approximately $3.6 million based upon the closing share price of the Company's
common stock as reported on the New York Stock Exchange ("NYSE") at the time
of acquisition. The three office buildings contain approximately 176,900
aggregate rentable square feet. The common units were issued in connection
with the acquisition of two office buildings located in San Diego, California
from entities controlled by Richard S. Allen, a former member of the Company's
Board of Directors (see Note 13).

   During the year ended December 31, 1999, the Company consummated a series
of transactions to acquire 31 acres of undeveloped land for an aggregate
purchase price of approximately $16.3 million in cash and 119,460

                                     F-12
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)

common units of the Operating Partnership valued at approximately $2.5 million
based upon the closing share price of the Company's common stock as reported
on the NYSE at the time of acquisition. The common units were issued in
connection with the acquisition of three acres of undeveloped land located in
San Diego, California from The Allen Group, a group of affiliated real estate
development and investment companies based in Visalia, California (see Note
13).

   During the first quarter of 1999, the Company acquired a 50% interest in 55
acres of undeveloped land in San Diego, California for $16.1 million and
184,172 common limited partnership units of the Operating Partnership valued
at $3.8 million based upon the closing share price of the Company's common
stock as reported on the NYSE at the time of acquisition. The undeveloped land
was acquired pursuant to an existing agreement executed by the Company and The
Allen Group in October 1997 that provided for the joint development of two
office projects with approximately 1.1 million aggregate rentable square feet
over the next five years (see Note 13).

   During the year ended December 31, 1998, the Company consummated a series
of transactions to acquire 25 office and 16 industrial buildings (the "1998
Acquisitions") (see Notes 20 and 21) for an aggregate purchase price of
approximately $236 million in cash and 703,869 common units of the Operating
Partnership valued at approximately $18.1 million based upon the closing share
price of the Company's common stock as reported on the NYSE at the time of
acquisition. The office and industrial buildings contain approximately 1.4
million and 674,000 aggregate rentable square feet, respectively. The common
units were issued in connection with the acquisition of four office buildings
located in San Diego, California and one industrial building located in Reno,
Nevada from entities controlled by Richard S. Allen (see Note 13).

   During the year ended December 31, 1998, the Company consummated a series
of transactions to acquire approximately 56 acres of undeveloped land for an
aggregate purchase price of approximately $25.4 million in cash and 90,787
common units of the Operating Partnership valued at approximately $2.5 million
based upon the closing share price of the Company's common stock as reported
on the NYSE at the time of acquisition. The common units were issued in
connection with the acquisition of 18 acres of undeveloped land located in
Calabasas, California from a partnership controlled by John B. Kilroy, Sr.,
the Chairman of the Company's Board of Directors, and John B. Kilroy, Jr., the
Company's President and Chief Executive Officer (see Note 13).

   The 1999 and 1998 operating property and undeveloped land acquisitions were
all funded primarily with existing working capital and borrowings on the
Company's revolving unsecured credit facility.

 Dispositions

   During the year ended December 31, 1999, the Company consummated a series
of transactions to sell five office and five industrial buildings for an
aggregate sales price of $14.6 million and $8.0 million, respectively. The
office and industrial buildings contained approximately 113,700 and 335,800
aggregate rentable square feet, respectively. The net gain on sale of $46,000
from these dispositions is reported after income from operations in the
consolidated statements of operations. The Company used the sales proceeds to
repay borrowings under its revolving unsecured credit facility, to fund
development expenditures and to fund the Company's share repurchase program
(see Note 9).

   During the year ended December 31, 1999, the Company consummated a series
of transactions to sell 13 acres of undeveloped land for an aggregate sales
price of $5.1 million. Of the total 13 acres sold, eight acres related to the
sale of a portion of the 18-acre undeveloped land parcel in Calabassas,
California which the Company acquired from John B. Kilroy, Sr. and John B.
Kilroy, Jr. during 1998 (see Note 13). As a result of the sale, a portion of
the public facility bonds related to this undeveloped land parcel was defeased
(see Note 13).

                                     F-13
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)

The total gain on sale of $0.5 million from these dispositions is included in
other income in the consolidated statements of operations. The Company used
the sales proceeds to repay borrowings under its revolving credit facility and
to fund development expenditures.

 Completed Development Projects

   During the year ended December 31, 1999, the Company completed the
development of six office and four industrial buildings encompassing an
aggregate of approximately 472,200 and 390,200 rentable square feet of office
and industrial space, respectively. All 10 of these buildings were stabilized
by the Company during 1999 and were therefore included in the Company's
stabilized portfolio of operating properties at December 31, 1999.

   During the year ended December 31, 1998, the Company completed the
development of one office and five industrial buildings encompassing an
aggregate of approximately 78,000 and 1.0 million rentable square feet,
respectively. Of the total 1.1 million rentable square feet completed during
1998, 344,500 rentable square feet was stabilized by the Company during 1998
and was included in the Company's stabilized operating portfolio at December
31, 1998. The Company stabilized the remaining rentable square feet during
1999.

4. Tenant Receivables

   Tenant receivables consisted of the following at December 31:

<TABLE>
<CAPTION>
                                                               1999     1998
                                                              -------  -------
                                                               (in thousands)
   <S>                                                        <C>      <C>
   Tenant rent, reimbursements, and other receivables.......  $ 9,305  $12,126
   Unbilled deferred rent...................................   15,466    8,249
   Allowance for uncollectible tenant receivables and
    unbilled deferred rent..................................   (2,693)  (1,456)
                                                              -------  -------
     Tenant receivables, net................................  $22,078  $18,919
                                                              =======  =======
</TABLE>

5. Deferred Financing and Leasing Costs

   Deferred financing and leasing costs are summarized as follows at December
31:

<TABLE>
<CAPTION>
                                                                1999     1998
                                                               -------  -------
                                                                (in thousands)
   <S>                                                         <C>      <C>
   Deferred financing costs................................... $ 6,892  $ 6,792
   Deferred leasing costs.....................................  32,872   20,506
                                                               -------  -------
     Total deferred financing and leasing costs...............  39,764   27,298
   Accumulated amortization................................... (11,924) (11,130)
                                                               -------  -------
     Deferred financing and leasing costs, net................ $27,840  $16,168
                                                               =======  =======
</TABLE>

                                     F-14
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


6. Mortgage Debt

   Mortgage debt consisted of the following at December 31:

<TABLE>
<CAPTION>
                                                               1999     1998
                                                             -------- --------
                                                              (in thousands)
   <S>                                                       <C>      <C>
   Mortgage note payable, due April 2009, fixed interest at
    7.20%, monthly principal and interest payments.......... $ 93,953
   Mortgage note payable, due October 2003, interest at
    LIBOR + 1.75%, (7.94% at December 31, 1999), monthly
    interest-only payments..................................   90,000
   Mortgage note payable, due February 2022, fixed interest
    at 8.35%,
    monthly principal and interest payments(a)..............   80,812 $ 82,025
   Mortgage note payable, due May 2017, fixed interest at
    7.15%, monthly principal and interest payments..........   29,440
   Mortgage note payable, due January 2000, interest at
    LIBOR + 1.50%,
    (7.05% at December 31, 1998), monthly interest-only
    payments................................................            19,000
   Mortgage note payable, due December 2005, fixed interest
    at 8.45%, monthly principal and interest payments.......   12,973   13,385
   Mortgage note payable, due November 2014, fixed interest
    at 8.43%, monthly principal and interest payments.......   10,966   11,323
   Mortgage note payable, due October 2013, fixed interest
    at 8.21%, monthly principal and interest payments.......    7,372    7,650
                                                             -------- --------
                                                             $325,516 $133,383
                                                             ======== ========
</TABLE>
- --------
(a) Beginning February 2005, the mortgage note is subject to increases in the
    effective interest rate to the greater of 13.35% or the sum of the
    interest rate for U.S. Treasury Securities maturing 15 years from the
    reset date plus 2.00%.

   The Company's mortgage debt was secured by 55 properties at December 31,
1999 with a combined net book value of $459 million and 24 properties at
December 31, 1998 with a combined net book value of $166 million. As of
December 31, 1999 and 1998, the Company's mortgage debt had a weighted average
interest rate of 7.80% and 8.22%, respectively.

   At December 31, 1999, six of the Company's mortgage loans contained
restrictions that would require the payment of prepayment penalties for the
acceleration of outstanding debt. The mortgage notes payable are secured by
deeds of trust on certain of the Company's properties and the assignment of
certain rents and leases associated with those properties.

   Scheduled principal payments for the above mortgage loans at December 31,
1999 were as follows:

<TABLE>
<CAPTION>
   Year Ending                                                    (in thousands)
   -----------                                                    -------------
   <S>                                                            <C>
     2000........................................................   $  4,834
     2001........................................................      5,225
     2002........................................................      5,647
     2003........................................................     96,103
     2004........................................................      6,596
     Thereafter..................................................    207,111
                                                                    --------
       Total.....................................................   $325,516
                                                                    ========
</TABLE>

                                     F-15
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)

7. Unsecured Line of Credit

   In November 1999, the Company increased its borrowing capacity and obtained
a new $400 million unsecured revolving credit facility (the "Credit Facility")
with a bank group lead by Morgan Guaranty Trust Company of New York and The
Chase Manhattan Bank, to replace its previous $350 million Credit Facility
(the "$350 million Credit Facility") which was scheduled to mature in February
2000, with the option to extend for one year. The Credit Facility bears
interest at a rate between LIBOR plus 1.13% and LIBOR plus 1.75% (7.56% at
December 31, 1999), depending upon the Company's leverage ratio at the time of
borrowing, and matures in November 2002. At December 31, 1999, the Company had
borrowings of $228 million outstanding under the Credit Facility and
availability of approximately $86.7 million. Availability under the Credit
Facility depends upon the value of the Company's pool of unencumbered assets.
The fee for unused funds ranges from 0.20% to 0.35% depending on the Company's
leverage ratios. The Company expects to use the Credit Facility to finance
development expenditures and for general corporate uses.

   In July 1998, the Company entered into two interest rate cap agreements
with a total notional amount of $150 million to effectively limit interest
expense on the Company's floating rate debt instruments during periods of
increasing interest rates. The agreements have LIBOR based cap rates of 6.50%
and expire in July 2000. The Company's exposure is limited to the $0.2 million
cost of the cap agreements, which the Company has amortized and included as a
component of interest expense in the consolidated statement of operations. The
cost of the cap agreements were fully amortized at December 31, 1999. The $0.1
million unamortized balance of the cost of the cap agreements at December 31,
1998 was included in other assets in the consolidated balance sheet.

   In February 2000, the Company entered into an interest rate swap agreement
with a total notional amount of $150 million to effectively limit interest
expense on the Company's floating rate debt during periods of increasing
interest rates. The agreement, which begins in February 2000 and expires in
February 2002, requires the Company to pay fixed rate interest payments based
on an interest rate of 6.95% and receive floating rate interest payments based
on one-month LIBOR.

   In February 2000, the Company entered into an interest rate cap agreement
with a total notional amount of $150 million to effectively limit interest
expense on the Company's floating rate debt during periods of increasing
interest rates. The agreement, which begins in July 2000 when the Company's
existing $150 of cap agreements expire, has a LIBOR based cap rate of 6.50%
and expires in January 2002. The Company's exposure is limited to the $1.9
million cost of the cap agreement which the Company will amortize over the
life of the agreement and include as a component of interest expense in the
consolidated statements of operations.

   As of December 31, 1998, the Company maintained a $350 million unsecured
Credit Facility with a bank group led by Morgan Guaranty Trust Company of New
York. The $350 million Credit Facility bore interest at a rates that ranged
from LIBOR plus 1.00% to LIBOR 1.38% (6.81% at December 31, 1998), depending
on the Company's leverage ratio at the time of borrowing, and was scheduled to
mature in February 2000, with the option to extend for one year. The fee for
unused funds was 0.20% based on outstanding balances. At December 31, 1998,
there were borrowings of $272 million and one letter of credit in the amount
of $1.0 million outstanding under the $350 million Credit Facility. The $1.0
million letter of credit was issued in connection with a signed commitment
letter for a mortgage loan that the Company executed during 1999. The $350
million Credit Facility was used to finance property acquisitions, development
and for general corporate uses.

   The Credit Facility contains covenants requiring the Company to meet
certain financial ratios and reporting requirements. Some of the more
restrictive covenants include a minimum debt service coverage ratio, a maximum
total liabilities to total assets ratio, a maximum total secured debt to total
assets ratio, a minimum cash flow to debt service and fixed charges ratio, a
minimum consolidated tangible net worth and a limit of development activities
as compared to total assets. The Company was in compliance with all of the
Credit Facility covenants at December 31, 1999.

                                     F-16
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


   Interest capitalized for the years ended December 31, 1999 and 1998 and the
eleven months ended December 31, 1997 was $11.3 million, $8.2 million, and
$1.5 million, respectively. There was no interest capitalized for the month of
January 1997.

8. Minority Interests

   During the year ended December 31, 1999 and 1998, the Operating Partnership
issued 472,034 and 794,656 common limited partnership units in the Operating
Partnership, respectively, in connection with certain operating property and
undeveloped land acquisitions (see Notes 3 and 13). In addition, 444,200
common limited partnership units of the Operating Partnership, of which
440,000 common limited partnership units were owned by John B. Kilroy, Sr.,
John B. Kilroy, Jr., and Kilroy Industries were exchanged during the third and
fourth quarters of 1999 into shares of the Company's common stock on a one-
for-one basis (see Notes 9 and 13). The Company owned an 86.8% general
partnership interest in the Operating Partnership as of December 31, 1999 and
1998.

   In March 1999, the Company became a 50% managing member in each of the
Development LLCs as a result of the acquisition of certain undeveloped land
and the simultaneous contribution of such land to the Development LLCs (see
Notes 3 and 13). The Development LLCs are consolidated for financial reporting
purposes because the Company holds a 50% ownership interest combined with the
ability to control all significant development decisions.

   In December 1999, the Company issued 900,000 9.250% Series D Cumulative
Redeemable Preferred units, representing limited partnership interests in the
Operating Partnership (the "Series D Preferred units"), with a liquidation
value of $50.00 per unit, in exchange for a gross contribution to the
Operating Partnership of $45.0 million. The Company used the contribution
proceeds, less applicable transaction costs and expenses of $1.2 million, for
the repayment of borrowings outstanding under the Credit Facility. The Series
D Preferred units, which may be called by the Operating Partnership at par on
or after December 9, 2004, have no stated maturity or mandatory redemption and
are not convertible into any other securities of the Operating Partnership.
The Series D Preferred units are exchangeable at the option of the majority of
the holders for shares of the Company's 9.250% Series C Cumulative Redeemable
Preferred stock beginning December 9, 2009, or earlier under certain
circumstances.

   In November 1998, the Company issued 700,000 9.375% Series C Cumulative
Redeemable Preferred units, representing limited partnership interests in the
Operating Partnership (the "Series C Preferred units"), with a liquidation
value of $50.00 per unit, in exchange for a gross contribution to the
Operating Partnership of $35.0 million. The Company used the contribution
proceeds, less applicable transaction costs and expenses of $0.9 million, for
the repayment of borrowings outstanding under the Credit Facility. The Series
C Preferred units, which may be called by the Operating Partnership at par on
or after November 24, 2003, have no stated maturity or mandatory redemption
and are not convertible into any other securities of the Operating
Partnership. The Series C Preferred Units are exchangeable at the option of
the majority of the holders for shares of the Company's 9.375% Series C
Cumulative Redeemable Preferred stock beginning November 24, 2008, or earlier
under certain circumstances.

   In February 1998, the Company issued 1,200,000 8.075% Series A Cumulative
Redeemable Preferred units, representing limited partnership interests in the
Operating Partnership (the "Series A Preferred units"), with a liquidation
value of $50.00 per unit, in exchange for a gross contribution to the
Operating Partnership of $60.0 million. The Company used the contribution
proceeds, less applicable transaction costs and expenses of $1.7 million, for
the repayment of borrowings outstanding under the Credit Facility. In April
1998, the Company

                                     F-17
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)

issued an additional 300,000 Series A Preferred units for a gross contribution
to the Operating Partnership of $15.0 million. The Company used the
contribution proceeds, less applicable transaction costs and expenses of $0.4
million for the repayment of borrowings outstanding under the Credit Facility.
The Series A Preferred units, which may be called by the Operating Partnership
at par on or after February 6, 2003, have no stated maturity or mandatory
redemption and are not convertible into any other securities of the Operating
Partnership. The Series A Preferred units are exchangeable at the option of
the majority of the holders for shares of the Company's 8.075% Series A
Cumulative Redeemable Preferred stock beginning February 6, 2008, or earlier
under certain circumstances.

   The Company makes quarterly distributions to the Series A, Series C and
Series D Preferred unitholders on the 15th day of each February, May, August
and November. Included in the Series A, Series C and Series D Preferred unit
balances on the balance sheet at December 31, 1999 were $0.8 million, $0.4
million and $0.2 million of accrued distributions payable to the Series A,
Series C and Series D Preferred unitholders, respectively. Included in the
Series A and Series C Preferred unit balances on the balance sheet at December
31, 1998 were $0.8 million and $0.3 million of accrued distributions payable
to the Series A and Series C Preferred unitholders, respectively.

9. Stockholders' Equity

   In December 1999, the Company announced the implementation of its share
repurchase program pursuant to which the Company is authorized to repurchase
up to an aggregate of 3.0 million shares of its outstanding common stock,
representing up to approximately 11% of the Company's currently outstanding
shares at December 31, 1999. During December 1999, the Company repurchased
265,000 shares in open market transactions for an aggregate repurchase price
of $5.4 million or $20.19 per share. Repurchases transacted during December
1999 were funded through proceeds received from the sale of operating
properties disposed of by the Company during December 1999 (see Note 3). The
Company intends to finance the continuation of its share repurchase program
during 2000 through proceeds from a targeted dispositions program of non-
strategic and mature industrial assets. Repurchases during 2000 will be made
from time to time in the open market or through privately negotiated
transactions, and may be discontinued at any time.

   In September 1999, the SEC declared effective the Company's registration
statement on Form S-3 with respect to 1,000,000 shares of the Company's common
stock to be issued under the Company's Dividend Reinvestment and Direct
Purchase Plan (the "Plan"). The Plan, which is designed to provide the
Company's stockholders and other investors with a convenient and economical
method to purchase shares of the Company's common stock, consists of three
programs: the Dividend Reinvestment Program (the "DRIP"), the Cash Option
Purchase Plan (the "COPP"), and the Waiver Discount Plan (the "WDP"). The DRIP
provides existing common stockholders with the opportunity to purchase
additional shares of the Company's common stock by automatically reinvesting
all or a portion of their cash dividends. The COPP provides existing common
stockholders and other investors with the opportunity to purchase additional
shares of the Company's common stock by making optional cash purchases, at no
discount to market, between $100 to $5,000 and $750 to $5,000, respectively,
in any calendar month. The WDP provides existing common stockholders and other
investors with the opportunity to purchase additional shares of the Company's
common stock by making optional cash purchases, at a discount to market of up
to 2.00% of the average per share price reported on the NYSE, of greater than
$5,000 in any calendar month. The Plan acquires shares of the Company's common
stock from either new issuances directly from the Company, from the open
market or from privately negotiated transactions, except for shares acquired
under the WDP which are purchased only from previously unissued shares of
common stock. Participation in the Plan is entirely voluntary, and can be
terminated at any time. The Company intends to use the proceeds received from
the Plan, less transaction costs, for development and investment activities,
repayment

                                     F-18
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)

of outstanding indebtedness and general corporate uses. As of December 31,
1999, there have been no previously unissued shares acquired under the Plan.

   During 1999, the Company filed two registration statements on Form S-3 with
the SEC which registered the potential issuance and resale of up to a total of
3,867,850 shares of the Company's common stock in exchange for 3,867,850
common limited partnership units of the Operating Partnership previously
issued in connection with certain 1997 and 1998 property acquisitions. The SEC
declared the registration statements effective in September and October 1999.
The common limited partnership units may be exchanged at the Company's option
into shares of the Company's common stock on a one-for-one basis. Neither the
Company nor the Operating Partnership will receive any of the proceeds from
the issuance of the common stock to the identified common unitholders. During
1999, 444,200 common limited partnership units of the Operating Partnership,
of which 440,000 common limited partnership units were owned by John B.
Kilroy, Sr., John B. Kilroy, Jr., and Kilroy Industries were exchanged during
the third and fourth quarters of 1999 into shares of the Company's common
stock (see Notes 8 and 13).

   In May 1999, the Company filed a registration statement on Form S-8 with
the SEC that registered the potential issuance and resale of up to 1,500,000
shares of the Company's common stock issuable to the Company's employees and
directors under the 1997 Stock Option and Incentive Plan.

   In October 1998, the Company adopted a Preferred Stock Purchase Rights Plan
(the "Rights Plan") under which common stockholders of record on October 15,
1998 received one Right for each share of the Company's outstanding common
stock. Each Right, which entitles its holder to buy one one-hundredth of a
share of voting preferred stock at an exercise price of $71.00, becomes
exercisable, subject to limited exceptions, if a person or group acquires 15%
or more of the Company's common stock or announces a tender offer for 15% or
more of the Company's common stock. Upon such event, each Right entitles its
holder to purchase, at the Right's then exercise price, a number of shares of
the Company's common stock equal to the market value at that time of twice the
Right's exercise price. Rights held by the acquirer will become void and will
not be exercisable upon the announcement of the acquisition. In the event that
the Company is acquired in a merger or other business combination, each Right
entitles its holder to purchase, at the Right's then current exercise price, a
number of shares of the acquiring company's common stock equal to the market
value at that time of twice the Right's exercise price. The Rights Plan
expires October 2, 2008. The Board may elect to redeem the Rights at $.001 per
Right.

   In February 1998, the SEC declared effective the Company's "shelf"
registration statement on Form S-3 with respect to $400 million of the
Company's equity securities. Through December 31, 1999, the Company completed
four underwritten offerings aggregating 3,012,326 shares of common stock and
two direct placements aggregating 161,884 shares of common stock with
aggregate net proceeds of $81.8 million. As of March 10, 2000, an aggregate of
$313 million of equity securities were available for issuance under the
registration statement. The Company, as general partner of the Operating
Partnership and as required by the terms and conditions of the Operating
Partnership's partnership agreement, contributed the net proceeds of the
offerings to the Operating Partnership, which used the net proceeds to repay
borrowings under the Credit Facility.

                                     F-19
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


   Accrued distributions at December 31, 1999 and 1998, consisted of the
following amounts payable to registered common stockholders of record holding
27,808,410 and 27,639,210 shares of common stock, respectively, and common
unitholders holding 4,228,702 and 4,200,868 common units of the Operating
Partnership, respectively:

<TABLE>
<CAPTION>
                                                                 December 31,
                                                                ---------------
                                                                 1999    1998
                                                                ------- -------
                                                                (in thousands)
   <S>                                                          <C>     <C>
   Distributions payable to:
     Common stockholders....................................... $11,680 $11,194
     Common unitholders........................................   1,776   1,701
                                                                ------- -------
       Total accrued distributions............................. $13,456 $12,895
                                                                ======= =======
</TABLE>

10. Future Minimum Rent

   The Company has operating leases with tenants that expire at various dates
through 2014 and are either subject to scheduled fixed increases or
adjustments based on the Consumer Price Index. Generally, the leases grant
tenants renewal options. Leases also provide for additional rents based on
certain operating expenses. Future minimum rent under operating leases,
excluding tenant reimbursements of certain costs, as of December 31, 1999, are
summarized as follows:

<TABLE>
<CAPTION>
   Year Ending
   -----------                                                    (in thousands)
   <S>                                                            <C>
   2000..........................................................   $136,302
   2001..........................................................    119,611
   2002..........................................................    106,972
   2003..........................................................    100,039
   2004..........................................................     84,250
   Thereafter....................................................    244,362
                                                                    --------
     Total.......................................................   $791,536
                                                                    ========
</TABLE>

11. Employee Retirement and Stock Option and Incentive Plans

 Retirement Savings Plan

   Effective November 1, 1997, the Company adopted a retirement savings plan
designed to qualify under Section 401(k) of the Internal Revenue Code (the
"401(k) Plan"). The 401(k) Plan allows participants to defer up to twenty
percent of their eligible compensation on a pre-tax basis, subject to certain
maximum amounts allowed by the Internal Revenue Code. The 401(k) Plan provides
for a matching contribution by the Company in an amount equal to fifty-cents
for each one dollar of participant contributions up to a maximum of five
percent of the participant's annual salary. Participants vest immediately in
the amounts contributed by the Company. Employees of the Company are eligible
to participate in the 401(k) Plan when they meet certain requirements
concerning minimum period of credited service. For the years ended December
31, 1999 and 1998, the Company contributed $0.1 million to the 401(k) Plan.

 Stock Option and Incentive Plan

   The Company has established a stock option and incentive plan (the "Stock
Plan") for the purpose of attracting and retaining officers and key employees,
under which restricted shares or stock options may be

                                     F-20
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)

granted. The Stock Plan authorizes the issuance of 3,000,000 shares of common
stock of the Company. As of December 31, 1999 and 1998, 100,000 shares have
been issued as restricted shares of common stock and options to purchase
25,000 and 1,339,000 shares of common stock, respectively, were granted to
Directors, officers and employees under the Stock Plan. At December 31, 1999
and 1998, 1,003,000 and 355,000 of the options, respectively were exercisable
and had a weighted average exercise price of $23.24 and $23.59, respectively.
The weighted average exercise price of the options outstanding at December 31,
1999 and 1998 was $23.07 and $23.37, respectively, with a weighted average
remaining contractual life of 8.0 and 9.1 years, respectively. Stock options
vest at 33 1/3% per year over three years beginning on the first anniversary
date of the grant and are exercisable at the market value on the date of the
grant. The term of each option is ten years from the date of the grant.

   Restricted stock is subject to restrictions determined by the Company's
Compensation Committee. The Compensation Committee, comprised of two Directors
who are not officers of the Company, determines compensation, including awards
under the Stock Plan, for the Company's executive officers. The shares of
restricted stock which have been granted, were sold at a purchase price equal
to $0.01 and vest 20% per year over a five-year period. Restricted stock has
the same dividend and voting rights as common stock and is considered to be
currently issued and outstanding. Compensation expense is determined by
reference to the market value of the Company's common shares and is being
amortized on a monthly basis over the five-year vesting period. In connection
with the IPO in January 1997, 100,000 shares of restricted stock were issued
to an executive officer of the Company for a price of $1,000. Compensation
expense relating to these shares was approximately $0.5 million for the years
ended December 31, 1999 and 1998 and $0.4 million for the eleven months ended
December 31, 1997.

   The Company's stock option activity is summarized as follows:

<TABLE>
<CAPTION>
                                                     Number of  Weighted Average
                                                      Options    Exercise Price
                                                     ---------  ----------------
   <S>                                               <C>        <C>
   Outstanding at February 1, 1997..................       --
     Granted........................................ 1,185,000       $23.80
                                                     ---------
   Outstanding at December 31, 1997................. 1,185,000        23.80
     Granted........................................ 1,339,000        23.28
     Cancelled......................................  (180,000)       26.30
                                                     ---------
   Outstanding at December 31, 1998................. 2,344,000        23.37
     Granted........................................    25,000        20.38
     Cancelled......................................  (375,000)       24.43
                                                     ---------
   Outstanding at December 31, 1999................. 1,994,000       $23.07
                                                     =========
</TABLE>

                                     F-21
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


   The Company has adopted the disclosure-only provisions of Statement of
Financial Accounting Standards No. 123, "Accounting for Stock-Based
Compensation" ("SFAS No. 123") and will continue to use the intrinsic value
based method of accounting prescribed by Account Practice Bulletin opinion No.
25, "Accounting for Stock Issued to Employees." Accordingly, no compensation
cost has been recognized for the options granted under the Stock Plan. Had
compensation cost for the Company's Stock Plan been determined based on the
fair value at the grant date consistent with the provisions of SFAS No. 123,
the Company's net income and net income on a per share basis would have been
adjusted to the pro forma amounts indicated below:

<TABLE>
<CAPTION>
                                                        February 1,
                               Year Ended   Year Ended    1997 to
                              December 31, December 31, December 31,
                                  1999         1998         1997
                              ------------ ------------ ------------
                                 (in thousands, except per share
                                             amounts)
   <S>                        <C>          <C>          <C>
   Net income:
     As reported.............   $39,895      $38,822      $22,060
     Pro forma...............    37,264       37,265       20,981
   Net income per common
    share--basic:
     As reported.............      1.44         1.44         1.20
     Pro forma...............      1.35         1.38         1.14
   Net income per common
    share--diluted:
     As reported.............      1.44         1.43         1.19
     Pro forma...............   $  1.34      $  1.38      $  1.13
</TABLE>


   The fair value of each option grant issued in 1999, 1998, and 1997 is
estimated on the date of grant using the Black-Scholes option-pricing model
with the following weighted average assumptions (amounts shown as 1999, 1998
and 1997, respectively): (a) dividend yield of 6.73%, 6.31% and 6.00%, (b)
expected volatility of the Company's stock of 27.0%, 26.2% and 21.8%, (c) risk
free interest rate of 6.64%, 4.73% and 5.44%, (d) expected option life of
seven years. The effects of applying SFAS No. 123 may not be representative of
the effects on disclosed pro forma net income for future years because options
vest over several years and additional awards can be made each year.

12. Commitments and Contingencies

   Operating leases--The Company has noncancelable ground lease obligations on
the SeaTac Office Center in Seattle, Washington expiring December 2032, with
an option to extend the lease for an additional 30 years; 12312 W. Olympic
Boulevard in Santa Monica, California with the primary lease expiring in
January 2065 and a smaller secondary lease expiring in September 2011; Kilroy
Airport Center, Long Beach, California with an initial lease period expiring
July 2035; and 9455 Towne Center in San Diego, California expiring in October
2043. On the Kilroy Airport Center and the SeaTac Office Center ground leases,
rentals are subject to adjustments every five years based on the Consumer
Price Index. On the 12312 W. Olympic Boulevard ground lease, rentals are
subject to adjustments every year based on the Consumer Price Index. On the
9455 Towne Center ground lease, rentals are subject to 5% annual increases.

                                     F-22
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


   The minimum commitment under these leases at December 31, 1999 was as
follows:

<TABLE>
<CAPTION>
   Year Ending
   -----------                                                    (in thousands)
   <S>                                                            <C>
    2000.........................................................    $ 1,879
    2001.........................................................      1,889
    2002.........................................................      1,899
    2003.........................................................      1,909
    2004.........................................................      1,899
    Thereafter...................................................     73,724
                                                                     -------
      Total......................................................    $83,199
                                                                     =======
</TABLE>

   Purchase agreement--In connection with an agreement signed with The Allen
Group in October 1997, the Company has agreed to purchase one office property
encompassing 128,000 rentable square feet, subject to the property meeting
certain occupancy thresholds. The purchase price for this property will be
determined at the time of acquisition based on the net operating income at
that time. The Company expects that in the event that this acquisition does
occur, it would be financed with borrowings under the Credit Facility and the
issuance of common limited partnership units of the Operating Partnership.

   The agreement with The Allen Group also provides for the development of two
office projects in San Diego, California with approximately 1.1 million
aggregate rentable square feet for an estimated aggregate development cost of
approximately $200 million. During the first quarter of 1999, the Company
purchased a 50% managing interest in both of the development projects (see
Notes 3 and 13). The Company has the option to purchase The Allen Group's
remaining interest in both projects for a purchase price to be determined upon
completion of the projects. Construction of phase I of both of the office
projects was completed during the third and fourth quarters of 1999.
Construction of phases II and III of the first office project commenced during
the second and third quarters of 1999, respectively, and phase IV is scheduled
to begin during the second quarter of 2000. Construction of phases II and III
of the second office project is scheduled to begin during the first quarters
of 2000 and 2001, respectively. The total presently budgeted investment for
the in process and committed phases of these two office projects discussed
herein is approximately $109 million, of which the Company has spent an
aggregate of $42.3 million as of December 31, 1999.

   Litigation--Neither the Company nor any of the Company's properties are
presently subject to any material litigation nor, to the Company's knowledge,
is any material litigation threatened against any of them which if determined
unfavorably to the Company would have a material adverse effect on the
Company's cash flows, financial condition or results of operations. The
Company is party to litigation arising in the ordinary course of business,
none of which if determined unfavorably to the Company is expected to have a
material adverse effect on the Company's cash flows, financial condition or
results of operations.

   Environmental Matters--The Company follows the policy of monitoring its
properties for the presence of hazardous or toxic substances. While there can
be no assurance that a material environmental liability does not exist, the
Company is not currently aware of any environmental liability with respect to
the properties that would have a material effect on the Company's financial
condition, results of operations and cash flows. Further, the Company is not
aware of any environmental liability or any unasserted claim or assessment
with respect to an environmental liability that the Company believes would
require additional disclosure or the recording of a loss contingency.

                                     F-23
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


13. Related-Party Transactions

   In March 1999, the Company acquired three office buildings in San Diego,
California from entities controlled by Richard S. Allen in exchange for $17.5
million in cash and 168,402 common units of the Operating Partnership valued
at approximately $3.6 million based upon the closing share price of the
Company's common stock as reported on the NYSE at the time the property was
acquired (see Note 3). The office property, which contains approximately
126,000 aggregate rentable square feet and is 100% leased through February
2014, was acquired pursuant to an existing agreement executed by the Company
and The Allen Group in October 1997. In connection with this anticipated
transaction, the Company entered into an agreement in May 1998 to loan
$2.3 million to a limited liability company controlled by Richard S. Allen to
finance tenant improvements to this property. The $2.3 million balance of the
note, which was secured by the pledge of membership interests in the limited
liability company, and the related interest, which accrued at a rate of Prime
plus 1.00%, was repaid to the Company in connection with the acquisition. A
former Executive Vice President of the Company received 98,476 of the total
168,402 common units issued in connection with the acquisition. The
acquisition was based upon terms that the Company believes were comparable to
terms obtainable from third-parties based on arm's-length negotiations.

   In February 1999, the Company acquired three acres of undeveloped land in
San Diego, California from entities controlled by Richard S. Allen in exchange
for $0.4 million in cash and 119,460 common limited partnership units of the
Operating Partnership valued at approximately $2.5 million based upon the
closing share price of the Company's common stock as reported on the NYSE at
the time the undeveloped land was acquired (see Note 3). A former Executive
Vice President of the Company received 76,896 of the total 119,460 common
units issued in connection with the acquisition. The acquisition was based
upon terms that the Company believes were comparable to terms obtainable from
third-parties based on arm's-length negotiations.

   During the first quarter of 1999, the Company acquired a 50% interest in 55
acres of undeveloped land in San Diego, California in exchange for $16.1
million and 184,172 common limited partnership units of the Operating
Partnership valued at approximately $3.8 million based upon the closing share
price of the Company's common stock as reported on the NYSE at the time the
undeveloped land was acquired (see Note 3). The undeveloped land was acquired
pursuant to an existing agreement executed by the Company and The Allen Group
in October 1997 that provided for the joint development of two office projects
with approximately 1.1 million aggregate rentable square feet over the next
five years. Both the Company and The Allen Group contributed their respective
50% interests in the undeveloped land to the two Development LLCs. In
connection with this anticipated transaction, the Company entered into an
agreement in May 1998 to loan up to $8.5 million to a limited partnership
controlled by Richard S. Allen to finance infrastructure improvements on the
undeveloped land. The $8.5 million balance of the note, which was secured by
the undeveloped land, was assumed by one of the Development LLCs. The related
interest, which accrued at a rate of LIBOR plus 1.85%, was paid to the Company
by the limited partnership. A former Executive Vice President of the Company
received 69,694 of the total 184,172 common units issued in connection with
the acquisition. The acquisition was based upon terms that the Company
believes were comparable to terms obtainable from third-parties based on
arm's-length negotiations.

   In March 1999, the Company acquired construction materials for its Kilroy
Airport Center, Long Beach development project from a partnership controlled
by John B. Kilroy Sr. and John B. Kilroy, Jr. for approximately $4.3 million.
The acquisition of the construction materials was based upon terms that the
Company believes were comparable to terms obtainable from third-parties based
on arm's-length negotiations.

   During the third and fourth quarters of 1999, 440,000 common limited
partnership units owned by John B. Kilroy, Sr., John B. Kilroy, Jr., and
Kilroy Industries were exchanged into shares of the Company's common stock on
a one-for-one basis (see Notes 8 and 9).

                                     F-24
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


   During 1998, the Company issued 703,869 common units of the Operating
Partnership valued at $18.1 million based upon the closing share price of the
Company's common stock as reported on the NYSE at the time of the respective
acquisitions. The common units were issued in connection with the acquisition
of four office buildings located in San Diego, California and one industrial
building located in Reno, Nevada from entities controlled by Richard S. Allen.
A former Executive Vice President of the Company received 303,316 of the total
703,869 common units issued in connection with the acquisitions. The
acquisitions were based upon terms that the Company believes were comparable
to terms obtainable from third-parties based on arm's-length negotiations.

   In April 1998, the Company acquired 18 acres of undeveloped land in
Calabasas, California from a partnership controlled by John B. Kilroy, Sr. and
John B. Kilroy, Jr. in exchange for $0.4 million in cash and the issuance of
90,787 common limited partnership units of the Operating Partnership valued at
$2.5 million based upon the closing share price of the Company's common stock
as reported on the NYSE at the time the undeveloped land was acquired. The
land is part of a 66-acre development site in Calabasas, California which is
presently entitled for over 1.0 million rentable square feet of office, retail
and hotel development. The acquisition was based upon terms which the Company
believes were comparable to arm's-length negotiations. In February 1999, the
Company sold eight acres of this 18-acres undeveloped land parcel to the City
of Calabasas for a total sales price of $1.4 million. The Company presently
plans to develop 213,000 rentable square feet of office space on the remaining
ten acres it currently owns. The infrastructure improvements on the land were
financed with public facility bonds which were refinanced in February 1999. In
connection with the refinancing, the portion of the original obligation that
related to the eight acres the Company sold to the City of Calabasas was
defeased. The refinanced bonds, which were sponsored by the City of Calabasas,
currently have a principal balance of $12.5 million and consist of: $5.9
million in serial bonds that mature annually beginning on September 1, 2000
through September 1, 2012 with annual principal payments ranging from $0.4
million to $0.6 million and interest rates ranging from 4.00% to 5.55%; $3.4
million of 5.65% Term Bonds due September 1, 2020; and $3.2 million of 5.75%
Term Bonds due September 1, 2028. Principal and interest on the public
facility bonds are to be charged to the Company and the other property owners
through special property tax bills through 2028. The bonds do not contain
cross-collateralization provisions and therefore if one property owner
defaulted on their special tax payments, the other property owners would not
be obligated to repay the defaulted taxes. Based on the planned development of
the total site, the Company's maximum obligation for its portion of the
development site is currently estimated at $5.5 million, but may decrease
depending on the actual size and number of buildings built. Because the
assessment on each individual property owner is dependent upon the rate of
development of the entire development site and therefore is not fixed and
determinable, the obligation was not recorded by the Company. The periodic
assessments are currently capitalized as development costs and will be charged
to operations upon the completion of construction.

   Pursuant to management agreements, the Operating Partnership provided
management and leasing services during 1999, 1998 and 1997, and KSI provided
development services during 1998 and 1997, with respect to two properties,
each of which is beneficially owned by John B. Kilroy, Sr. and John B. Kilroy,
Jr. The Operating Partnership recorded fees of $0.1 million, $0.2 million and
$0.1 million for the years ended December 31, 1999 and 1998 and the eleven
months ended December 31, 1997, respectively, relating to the management and
leasing services. KSI recorded fees of $0.1 million and $0.2 million for the
year ended December 31, 1998 and the eleven months ended December 31, 1997,
respectively, related to the development services.

   In October 1997, KSI entered into a management agreement to manage the
development of certain properties owned by entities under the common control
of Richard S. Allen. At December 31, 1999 and 1998, KSI had a receivable
balance of $0.3 million and $0.2 million for management fees earned,
respectively.

                                     F-25
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


14. Fair Value of Financial Instruments

   The carrying amounts of the Company's cash and cash equivalents, restricted
cash and accounts payable approximate fair value due to their short-term
maturities. The carrying amounts of the Company's variable rate mortgage debt,
outstanding borrowings on the Credit Facility and $350 million Credit
Facility, and notes receivable from related parties approximate fair value
since the interest rates on these instruments are equivalent to rates
currently offered to the Company.

   For fixed rate mortgage debt, the Company estimates fair value by using
discounted cash flow analyses based on borrowing rates for similar types of
borrowing arrangements. The fair value of the Company's fixed rate mortgage
debt was $225 million and $121 million at December 31, 1999 and 1998,
respectively.

   For the Series A, Series C, and Series D Preferred units, the Company
estimates fair value by using discounted cash flow analyses based on borrowing
rates for similar types of fixed rate financial instruments. The fair value of
the Series A, Series C and Series D Preferred units was $146 million at
December 31, 1999. The fair value of the Series A and Series C Preferred units
was $99.2 million at December 31, 1998.

   For interest rate cap agreements, the carrying amount, which is comprised
of the unamortized premium the Company paid to enter into the agreements,
approximates fair value since at December 31, 1999 and 1998, the cap rates
exceeded the market rate of the contractually specified interest rate indices.

15. Segment Disclosure

   The Company's reportable segments consist of the two types of commercial
real estate properties for which management internally evaluates operating
performance and financial results: Office Properties and Industrial
Properties. The Company also has certain corporate level activities including
legal, accounting, finance, and management information systems which are not
considered separate operating segments.

   The Company evaluates the performance of its segments based upon net
operating income. Net operating income is defined as operating revenues
(rental income, tenant reimbursements and other property income) less property
and related expenses (property expenses, real estate taxes, and ground leases)
and excludes interest income and expense, depreciation and amortization, and
corporate general and administrative expenses. The accounting policies of the
reportable segments are the same as those described in the Company's summary
of significant accounting policies (see Note 2). There is no intersegment
activity.

                                     F-26
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


   The following tables reconcile the Company's segment activity to its
consolidated results of operations and financial position as of and for the
years ended December 31, 1999 and 1998 and the period February 1, 1997 to
December 31, 1997, and reconciles the Kilroy Group's segment activity to its
combined results of operations for the period January 1, 1997 to January 31,
1997.

<TABLE>
<CAPTION>
                                    Kilroy Realty Corporation      Kilroy Group
                                  -------------------------------- ------------
                                                      February 1,   January 1,
                                     Year Ended         1997 to      1997 to
                                    December 31,      December 31, January 31,
                                    1999      1998        1997         1997
                                  --------  --------  ------------ ------------
                                                (in thousands)
<S>                               <C>       <C>       <C>          <C>
Revenues and Expenses

Office Properties:
Operating revenues(1)............ $109,272  $ 96,077    $47,179       $2,555
Property and related expenses....   26,539    24,163     11,476          752
                                  --------  --------    -------       ------
Net operating income, as
 defined.........................   82,733    71,914     35,703        1,803
                                  --------  --------    -------       ------

Industrial Properties:
Operating revenues(1)............   49,253    39,313     16,530          529
Property and related expenses....    7,896     6,724      2,431           28
                                  --------  --------    -------       ------
Net operating income, as
 defined.........................   41,357    32,589     14,099          501
                                  --------  --------    -------       ------

Total Reportable Segments:
Operating revenues(1),(2)........  158,525   135,390     63,709        3,084
Property and related expenses....   34,435    30,887     13,907          780
                                  --------  --------    -------       ------
Net operating income, as
 defined.........................  124,090   104,503     49,802        2,304
                                  --------  --------    -------       ------

Reconciliation to Consolidated
 Net Income:
Total net operating income, as
 defined, for reportable
 segments........................  124,090   104,503     49,802        2,304
Other unallocated revenues:
  Interest income................    1,175     1,698      3,571
Other unallocated expenses:
  General and administrative
   expenses......................    9,091     7,739      4,949           78
  Other expenses.................                                         46
  Provision for potentially
   unrecoverable pre-development
   costs.........................                         1,700
  Interest expense...............   26,309    20,568      9,738        1,895
  Depreciation and amortization..   33,794    26,200     13,236          787
                                  --------  --------    -------       ------
Net income before gains on
 dispositions of operating
 properties, equity in income of
 unconsolidated subsidiary,
 minority interests and
 extraordinary gains.............   56,071    49,994     25,450         (502)
Gains on dispositions of
 operating properties............       46
Equity in income of
 unconsolidated subsidiary.......       17         5         23
Minority interests...............  (16,239)  (11,177)    (3,413)
                                  --------  --------    -------       ------
Net income (loss) before
 extraordinary gains............. $ 39,895  $ 38,822    $22,060       $ (502)
                                  ========  ========    =======       ======
</TABLE>
- --------
(1)  All operating revenues are comprised of amounts received from external
     tenants.

(2)  Total consolidated revenues equals total operating revenues from
     reportable segments plus interest income and development services income.

                                     F-27
<PAGE>

                     KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

      NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


<TABLE>
<CAPTION>
                                                              December 31,
                                                          ---------------------
                                                             1999       1998
                                                          ---------- ----------
                                                             (in thousands)
<S>                                                       <C>        <C>
Assets:
Office Properties:
Land, buildings and improvements, net.................... $  684,629 $  599,771
Undeveloped land and construction in progress, net.......    189,645     79,924
Total assets.............................................    902,015    699,876

Industrial Properties:
Land, buildings and improvements, net....................    361,536    336,717
Undeveloped land and construction in progress, net.......                32,435
Total assets.............................................    377,179    379,740

Total Reportable Segments:
Land, buildings and improvements, net....................  1,046,165    936,488
Undeveloped land and construction in progress, net.......    189,645    112,359
Total assets.............................................  1,279,194  1,079,616

Reconciliation to Consolidated Assets:
Total assets for reportable segments.....................  1,279,194  1,079,616
Other unallocated assets:
  Cash and cash equivalents..............................     26,116      6,443
  Restricted cash........................................      6,636      6,896
  Notes receivable from related parties..................                 8,798
  Deferred financing costs, net..........................      6,535      4,318
  Prepaid expenses and other assets......................      2,020      3,146
                                                          ---------- ----------
    Total consolidated assets............................ $1,320,501 $1,109,217
                                                          ========== ==========
</TABLE>

<TABLE>
<CAPTION>
                                                               December 31,
                                                             -----------------
                                                               1999     1998
                                                             -------- --------
                                                              (in thousands)
<S>                                                          <C>      <C>
Capital Expenditures:(1)
Office Properties:
Building acquisitions and expenditures for completed
 development................................................ $ 97,139 $177,641
Recurring capital expenditures and tenant improvements......   15,662    8,347

Industrial Properties:
Building acquisitions and expenditures for completed
 development................................................   47,107   90,722
Recurring capital expenditures and tenant improvements......    4,298    5,196

Total Reportable Segments:
Building acquisitions and expenditures for completed
 development................................................  144,246  268,363
Recurring capital expenditures and tenant improvements...... $ 19,960 $ 13,543
</TABLE>
- --------
(1) Total consolidated capital expenditures are equal to the same amounts
    disclosed for total reportable segments.

                                      F-28
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


16. Earnings Per Share

   Basic earnings per share is computed by dividing net income by the
weighted-average number of common shares outstanding for the period. Diluted
earnings per share is computed by dividing net income by the sum of the
weighted-average number of common shares outstanding for the period plus the
assumed exercise of all dilutive securities. The Company does not consider
common units of the Operating Partnership to be dilutive securities since the
exchange of common units into common stock is on a one for one basis and would
not have any effect on diluted earnings per share. The following table
reconciles the numerator and denominator of the basic and diluted per-share
computations for net income for the years ended December 31, 1999 and 1998 and
the eleven months ended December 31, 1997:

<TABLE>
<CAPTION>
                                       Year Ended December 31, 1999
                            -------------------------------------------------------
                                 Income              Shares            Per Share
                              (Numerator)        (Denominator)           Amount
                            ----------------   -------------------   --------------
                            (in thousands, except share and per share amounts)
   <S>                      <C>                <C>                   <C>
   Basic...................   $39,895             27,701,495           $1.44
   Effect of dilutive
    securities:
     Stock options
      granted..............                           25,808
                              -------             ----------           -----
   Diluted.................   $39,895             27,727,303           $1.44
                              =======             ==========           =====
<CAPTION>
                                       Year Ended December 31, 1998
                            -------------------------------------------------------
                                 Income              Shares            Per Share
                              (Numerator)        (Denominator)           Amount
                            ----------------   -------------------   --------------
                            (in thousands, except share and per share amounts)
   <S>                      <C>                <C>                   <C>
   Basic...................   $38,822             26,989,422           $1.44
   Effect of dilutive
    securities:
     Stock options
      granted..............                           70,566            (.01)
                              -------             ----------           -----
   Diluted.................   $38,822             27,059,988           $1.43
                              =======             ==========           =====
<CAPTION>
                            Period from February 1, 1997 to December 31, 1997
                            -------------------------------------------------------
                                 Income              Shares            Per Share
                              (Numerator)        (Denominator)           Amount
                            ----------------   -------------------   --------------
                            (in thousands, except share and per share amounts)
   <S>                      <C>                <C>                   <C>
   Basic...................   $22,060             18,445,149           $1.20
   Effect of dilutive
    securities:
     Stock options
      granted..............                           94,150            (.01)
                              -------             ----------           -----
   Diluted.................   $22,060             18,539,299           $1.19
                              =======             ==========           =====
</TABLE>

                                     F-29
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


17. Tax Treatment of Distributions

   The income tax reporting for distributions paid to registered common
stockholders and common limited partnership unitholders during the years ended
December 31, 1999 and 1998 was as follows:

<TABLE>
<CAPTION>
                                                                 1999   1998
                                                                ------ ------
                                                                (in thousands)
   <S>                                                          <C>    <C>
   Distributions for record dates March 31, June 30, and
    September 30 reportable in the current year................ $1.260 $1.215
   Distributions for record date December 31 reportable in
    following year.............................................  0.420  0.405
                                                                ------ ------
   Total distributions per share............................... $1.680 $1.620
                                                                ====== ======
</TABLE>

   The income tax treatment for distributions reportable in 1999 and 1998, as
identified in the table above, was as follows:

<TABLE>
<CAPTION>
                                                                  1999   1998
                                                                  -----  -----
   <S>                                                            <C>    <C>
   Percent of distributions taxable as ordinary income..........  90.48% 98.77%
   Percent of distributions taxable as unrecaptured section 1250
    capital gains...............................................   0.71%
   Percent of distributions not taxable as current year return
    of capital..................................................   8.81%  1.23%
</TABLE>

18. Quarterly Financial Information (Unaudited)

   Summarized quarterly financial data for the years ended December 31, 1999
and 1998 and the eleven months ended December 31, 1997 was as follows:

<TABLE>
<CAPTION>
                                              1999 Quarter Ended
                                 ---------------------------------------------
                                 March 31, June 30, September 30, December 31,
                                 --------- -------- ------------- ------------
                                   (in thousands, except per share amounts)
   <S>                           <C>       <C>      <C>           <C>
   Total revenues...............  $37,550  $39,301     $40,202      $42,647
   Income before minority
    interests and extraordinary
    gains.......................   13,780   14,951      15,109       12,294
   Net income...................    9,910   10,796      10,911        8,278
   Net income per common share
    diluted.....................  $  0.36  $  0.39     $  0.39      $  0.30
</TABLE>

<TABLE>
<CAPTION>
                                            1998 Quarter Ended
                            --------------------------------------------------
                            March 31, 1998 June 30, September 30, December 31,
                            -------------- -------- ------------- ------------
                                 (in thousands, except per share amounts)
   <S>                      <C>            <C>      <C>           <C>
   Total revenues..........    $29,353     $33,922     $34,519      $39,294
   Income before minority
    interests and
    extraordinary gains....     10,789      12,771      12,886       13,553
   Net income..............      8,879       9,785       9,985       10,173
   Net income per common
   share diluted...........    $  0.35     $  0.36     $  0.36      $  0.37
</TABLE>

                                     F-30
<PAGE>

                    KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

     NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


19. Subsequent Events

   In January 2000, aggregate distributions of $13.5 million were paid to
common stockholders and common unitholders of record on December 31, 1999.

   In January 2000, the Company sold two office buildings containing
approximately 45,300 aggregate rentable square feet for a sales price of $3.4
million at a loss of approximately $0.3 million.

   In February 2000, the Company entered into an interest rate cap agreement
with a total notional amount of $150 million that begins in February 2000 and
an interest rate swap agreement with a total notional amount of $150 million
that begins in July 2000 (see Note 7).

   Through March 10, 2000, the Company repurchased approximately 2.0 million
shares of its common stock in open market transactions for an aggregate
repurchase price of approximately $41.2 million or $20.58 per share.

                                     F-31
<PAGE>

                     KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

      NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


20. Schedule of Rental Property

<TABLE>
<CAPTION>
                                                December 31, 1999
                     -----------------------------------------------------------------------
                                                             Gross Amounts
                                              Costs        at which Carried
                         Initial Cost      Capitalized    at Close of Period                                      Net
                     -------------------- Subsequent to -----------------------                   Date of       Rentable
                            Buildings and Acquisition/                          Accumulated   Acquisition(A)/    Square
 Property Location    Land  Improvements   Improvement   Land  Building  Total  Depreciation Construction(C)(1)   Feet
 -----------------   ------ ------------- ------------- ------ -------- ------- ------------ ------------------ --------
                                                           (dollars in thousands)
<S>                  <C>    <C>           <C>           <C>    <C>      <C>     <C>          <C>                <C>
Office Properties:
Kilroy Airport
 Center, El Segundo
 El Segundo,
  California.......  $6,141    $69,195       $21,734    $6,141 $90,929  $97,070   $54,358           1983(C)     701,307
Kilroy Airport
 Center, Phase I--
 Long Beach,
  California.......                           24,379            24,379   24,379     2,009           1997(A)     225,217
Kilroy Airport
 Center, Phase II--
 Long Beach,
  California.......             47,387         8,784            56,171   56,171    23,165           1989(C)     395,480
La Palma Business
 Center
 4175 E. La Palma
  Avenue
 Anaheim,
  California.......   1,518      2,612           257     1,518   2,869    4,387       263           1997(A)      42,790
2829 Townsgate Road
 Thousand Oaks,
  California.......   5,248      8,001         1,208     5,248   9,138   14,457       700           1997(A)      81,158
181/185 S. Douglas
 Street
 El Segundo,
  California.......     525      4,687         1,910       628   6,494    7,122     4,133           1978(C)      60,000
SeaTac Office
 Center
 Seattle,
  Washington.......             25,993        17,367            43,360   43,360    27,007           1977(C)     532,430
23600-23610 Telo
 Avenue
 Torrance,
  California.......   2,636      3,975           292     2,636   4,267    6,903       299           1997(A)      79,967
2100 Colorado
 Avenue
 Santa Monica,
  California.......   5,474     26,087            51     5,476  26,136   31,612     1,865           1997(A)      94,844
5151-5155 Camino
 Ruiz
 Camarillo,
  California.......   4,501     19,710           583     4,501  20,293   24,794     1,469           1997(A)     276,216
111 Pacifica
 Irvine,
  California.......   5,165      4,653           263     5,166   4,915   10,081       370           1997(A)      67,401
2501 Pullman
 Santa Ana,
  California.......   6,588      9,050           900     6,588  10,021   16,538       642           1997(A)     124,921
26541 Agoura Road
 Calabasas,
  California.......   1,979      9,630         2,209     1,979  11,839   13,818       734           1997(A)      90,878
9451 Toledo Way
 Irvine,
  California.......                869           201             1,070    1,070        65           1997(A)      27,200
1633 26th Street
 Santa Monica,
  California.......   2,080      6,672           329     2,040   7,041    9,081       556           1997(A)      43,800
4351 Latham Avenue
 Riverside,
  California.......     307      1,555           172       307   1,727    2,034       121           1997(A)      21,356
4361 Latham Avenue
 Riverside,
  California.......     764      3,577            78       765   3,654    4,419       237           1997(A)      30,842
601 Valencia Avenue
 Brea, California..   3,518      2,900            99     3,519   2,998    6,517       216           1997(A)      60,891
3750 University
 Avenue
 Riverside,
  California.......   2,909     19,372           403     2,912  19,772   22,684     1,249           1997(A)     124,986
6220 Greenwich
 Drive
 San Diego,
  California.......   4,796     15,863            58     4,805  15,912   20,717     1,109           1997(A)     141,214
</TABLE>


                                      F-32
<PAGE>

                     KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

      NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


<TABLE>
<CAPTION>
                                                December 31, 1999
                     -----------------------------------------------------------------------
                                                             Gross Amounts
                                              Costs        at which Carried
                         Initial Cost      Capitalized    at Close of Period                                      Net
                     -------------------- Subsequent to -----------------------                   Date of       Rentable
                            Buildings and Acquisition/                          Accumulated   Acquisition(A)/    Square
 Property Location    Land  Improvements   Improvement   Land  Building  Total  Depreciation Construction(C)(1)   Feet
 -----------------   ------ ------------- ------------- ------ -------- ------- ------------ ------------------ --------
                                                           (dollars in thousands)
<S>                  <C>    <C>           <C>           <C>    <C>      <C>     <C>          <C>                <C>
6055 Lusk Avenue
 San Diego,
  California.......  $3,935    $ 8,008       $   21     $3,942  $8,022  $11,964    $  497          1997(A)       93,000
6260 Sequence Drive
 San Diego,
  California.......   3,206      9,803           23      3,212   9,820   13,032       608          1997(A)      130,000
6290 Sequence Drive
 San Diego,
  California.......   2,403      7,349           17      2,407   7,362    9,769       456          1997(A)       90,000
8101 Kaiser Blvd.
 Anaheim,
  California.......   2,369      6,180           82      2,377   6,254    8,631       376          1997(A)       60,177
3130 Wilshire Blvd.
 Santa Monica,
  California.......   8,921      6,579        3,337      9,188   9,649   18,837       715          1997(A)       88,338
12312 W. Olympic
 Blvd.
 Los Angeles,
  California.......   3,325     12,202          581      3,399  12,709   16,108       599          1997(A)       78,000
Pacific Park Plaza
 Aliso Viejo,
  California.......   6,281      8,314          122      6,287   8,430   14,717       508          1997(A)      134,667
Anaheim Corporate
 Center
 Anaheim
  California.......   5,305     10,149          570      5,310  10,714   16,024       693          1997(A)      159,222
525 N. Brand Blvd.
 Glendale,
  California.......   1,360      8,771          101      1,373   8,859   10,232       506          1997(A)       43,647
Kilroy Airport Long
 Beach--
 Phase III & IV(2)
 Long Beach,
  California ......                           4,997              4,997    4,997     2,818
Olympic/Bundy
 Los Angeles,
  California.......              7,628       (7,583)                45       45       110          1998(A)       48,356
Fullerton Business
 Center
 Fullerton,
  California.......   4,155      6,482          339      4,155   6,821   10,976       410          1998(A)      151,975
501 Santa Monica
 Blvd.
 Santa Monica,
  California.......   4,547     12,044          474      4,551  12,514   17,065       727          1998(A)       70,089
1240-1250 Lakeview
 Blvd.
 Anaheim,
  California.......   2,851      4,295          227      2,851   4,522    7,373       241          1998(A)       78,903
5770 Armada Drive
 Carlsbad,
  California.......   2,626      7,880                   2,626   7,880   10,506       394          1998(A)       81,712
6340-6350 Sequence
 Drive
 San Diego,
  California.......   7,375     22,126        2,400      7,386  24,515   31,901     1,297          1998(A)      200,000
4880 Santa Rosa
 Road
 Camarillo,
  California.......   2,389      2,641                   2,389   2,641    5,030       136          1998(A)       41,131
15378 Avenue of
 Science
 San Diego,
  California.......   3,565      3,796                   3,565   3,796    7,361       181          1998(A)       68,910
10398-10421 Pacific
 Center Court
 San Diego,
  California.......  14,979     39,634          925     14,979  40,559   55,538     1,982          1998(A)      411,402
3990 Ruffin Road
 San Diego,
  California.......   2,467      3,700            1      2,467   3,701    6,168       167          1998(A)       45,634
2231 Rutherford
 Road
 Carlsbad,
  California.......   1,006      4,155            1      1,007   4,155    5,162       188          1998(A)       40,772
</TABLE>

                                      F-33
<PAGE>

                     KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

      NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


<TABLE>
<CAPTION>
                                                December 31, 1999
                   ---------------------------------------------------------------------------
                                                             Gross Amounts
                                                            at which Carried
                       Initial Cost          Costs         at Close of Period
                   ---------------------  Capitalized  --------------------------                                    Net
                             Buildings   Subsequent to                                              Date of       Rentable
                                and      Acquisition/                             Accumulated   Acquisition (A)/   Square
Property Location    Land   Improvements  Improvement    Land   Building  Total   Depreciation Construction(C)(1)   Feet
- -----------------  -------- ------------ ------------- -------- -------- -------- ------------ ------------------ ---------
                                                         (dollars in thousands)
<S>                <C>      <C>          <C>           <C>      <C>      <C>      <C>          <C>                <C>
9455 Town Center
 Drive
 San Diego,
  California.....             $  3,936     $     33             $  3,969 $  3,969   $    222          1998(A)        45,195
Carmel Valley
 Corporate Center
 San Diego,
   California ...     3,207     18,176           55       3,213   18,225   21,438        655          1998(A)       115,513
12348 High Bluff
 Drive San Diego,
 California......     1,629      3,096        1,119       1,629    4,215    5,844        218          1999(C)        39,336
4690 Executive
 Drive San Diego,
 California......     1,623      7,926                    1,623    7,926    9,549         94          1999(A)        50,929
LPL Financial
 Complex
 San Diego,
 California......     4,536     16,554                    4,536   16,554   21,090        355          1999(A)       126,000
Sorrento Gateway
 San Diego,
 California......     7,106     15,816                    7,106   15,816   22,922        259          1999(C)       172,778
3579 Valley
 Center Drive
 San Diego,
 California......     2,167      6,897                    2,167    6,897    9,064         71          1999(C)        52,375
6215 Greenwich
 Drive San Diego,
 California......       343      4,997        2,840         343    7,837    8,180        207          1999(C)        71,000
Kilroy Airport
 Center--Phase
 III
 Long Beach,
  California.....                            20,490               20,490   20,490        309          1999(C)       136,026
                   --------   --------     --------    -------- -------- --------   --------                      ---------
TOTAL OFFICE
 PROPERTIES......  $157,825   $550,922     $112,449    $158,317 $662,879 $821,196   $136,566                      6,147,985
                   --------   --------     --------    -------- -------- --------   --------                      ---------

Industrial
 Properties:
2031 E. Mariposa
 Avenue
 El Segundo,
 California......  $    132   $    867     $  2,698    $    132 $  3,565 $  3,697   $  3,365          1954(C)       192,053
3340 E. La Palma
 Avenue
 Anaheim,
 California......        67      1,521        2,830          67    4,351    4,418      4,066          1966(C)       153,320
2260 E. El
 Segundo Blvd.
 El Segundo,
  California.....     1,423      4,194        1,402       1,703    5,316    7,019      3,509          1979(C)       113,820
2265 E. El
 Segundo Blvd.
 El Segundo,
  California.....     1,352      2,028          645       1,571    2,454    4,025      1,757          1978(C)        76,570
1000 E. Ball Road                                                                                     1956(C)/
 Anaheim,
  California.....       838      1,984          921         838    2,905    3,743      2,161          1974(A)       100,000
1230 S. Lewis
 Road
 Anaheim,
 California......       395      1,489        2,058         395    3,547    3,942      2,738          1982(C)        57,730
12681/12691 Pala
 Drive
 Garden Grove,
 California......       471      2,115        2,688         471    4,803    5,274      3,464          1980(A)        84,700
2270 E. El
 Segundo Blvd.
 El Segundo,
  California.....       361        100          156         419      198      617         87          1977(C)         6,362
5115 N. 27th
 Avenue
 Phoenix,
 Arizona.........       125      1,206          182         125    1,388    1,513      1,168          1962(C)       130,877
12752-12822
 Monarch Street
 Garden Grove,
 California......     3,975      5,238          329       3,975    5,567    9,542        460          1997(A)       277,037
4155 E. La Palma
 Avenue
 Anaheim,
 California......     1,148      2,681          113       1,148    2,794    3,942        256          1997(A)        74,618
</TABLE>

                                      F-34
<PAGE>

                     KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

      NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


<TABLE>
<CAPTION>
                                                December 31, 1999
                      ----------------------------------------------------------------------
                                                             Gross Amounts
                                                          at which Carried at
                         Initial Cost         Costs         Close of Period
                      -------------------  Capitalized  -----------------------                                   Net
                              Buildings   Subsequent to                                           Date of       Rentable
                                 and      Acquisition/                          Accumulated   Acquisition(A)/    Square
 Property Location     Land  Improvements  Improvement   Land  Building  Total  Depreciation Construction(C)(1)   Feet
 -----------------    ------ ------------ ------------- ------ -------- ------- ------------ ------------------ --------
                                                            (dollars in thousands)
<S>                   <C>    <C>          <C>           <C>    <C>      <C>     <C>          <C>                <C>
4125 E. La Palma
 Avenue
 Anaheim,
 California.........  $1,690   $ 2,604       $    15    $1,691 $ 2,618  $ 4,309    $  232           1997(A)      69,472
Brea Industrial
 Properties
 Brea, California...   1,263    13,927            56     1,263  13,983   15,246     1,030           1997(A)     276,278
Garden Grove
 Industrial
 Properties
 Garden Grove,
 California.........   1,868    11,894           340     1,868  12,234   14,102       946           1997(A)     275,971
17150 Von Karman
 Irvine,
 California.........   4,848     7,342                   4,848   7,342   12,190       559           1997(A)     157,458
7421 Orangewood
 Avenue
 Garden Grove,
 California.........     612     3,967                     612   3,967    4,579       274           1997(A)      82,602
5325 East Hunter
 Avenue
 Anaheim,
 California.........   1,728     3,555                   1,728   3,555    5,283       271           1997(A)     109,449
184-220 Technology
 Drive
 Irvine,
 California.........   7,464     7,621         1,057     7,464   8,678   16,142       908           1997(A)     157,499
9401 Toledo Way
 Irvine, California
 (3)................   8,572     7,818        (2,751)    5,665   7,974   13,639       560           1997(A)     244,800
12400 Industry
 Street
 Garden Grove,
 California.........     943     2,110            35       943   2,145    3,088       159           1997(A)      64,200
Walnut Park Business
 Center
 Diamond Bar,
 California.........   2,588     6,090         1,258     2,955   6,981    9,936       415           1997(A)     165,420
2055 S.E. Main
 Street
 Irvine,
  California........     772     2,343            39       772   2,382    3,154       157           1997(A)      47,583
201 North Sunrise
 Avenue
 Roseville,
 California.........   2,622    11,741             2     2,622  11,743   14,365       783           1997(A)     162,203
14831 Franklin
 Avenue
 Tustin,
  California........   1,112     1,065           166     1,113   1,230    2,343        71           1997(A)      36,256
6828 Nancy Ridge
 Drive
 San Diego,
 California.........   1,914     1,110             1     1,914   1,111    3,025        74           1997(A)      39,669
1961 Concourse Drive
 San Jose,
 California.........   5,112     6,549           261     5,112   6,810   11,922       441           1997(A)     110,132
1710 Fortune Drive
 San Jose,
 California.........   3,362     5,750           313     3,362   6,063    9,425       394           1997(A)      86,000
1675 MacArthur
 Costa Mesa,
 California.........   2,076     2,114                   2,076   2,114    4,190       141           1997(A)      50,842
3130-3150 Miraloma
 Anaheim,
 California.........   3,335     3,727            25     3,335   3,752    7,087       241           1997(A)     144,000
3125 E. Coronado
 Street
 Anaheim,
 California.........   3,669     4,341                   3,669   4,341    8,010       279           1997(A)     144,000
1951 E. Carnegie
 Santa Ana,
 California.........   1,830     3,630           801     1,844   4,417    6,261       269           1997(A)     100,000
5115 E. La Palma
 Avenue
 Anaheim,
 California.........   2,462     6,675         4,448     2,464  11,121   13,585       549           1997(A)     286,139
3735 Imperial
 Highway
 Stockton,
 California.........     764    10,747            18       764  10,765   11,529       666           1997(A)     164,540
41093 County Center
 Drive
 Temecula,
 California.........   1,709     2,841             7     1,712   2,845    4,557       176           1997(A)      77,582
1840 Aerojet Way
 Las Vegas, Nevada..     727     3,792             8       728   3,799    4,527       235           1997(A)     102,948
</TABLE>

                                      F-35
<PAGE>

                     KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

      NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


<TABLE>
<CAPTION>
                                                 December 31, 1999
                   -----------------------------------------------------------------------------
                                                              Gross Amounts
                                                           at which Carried at
                       Initial Cost          Costs           Close of Period
                   ---------------------  Capitalized  ----------------------------                                    Net
                             Buildings   Subsequent to                                                Date of        Rentable
                                and      Acquisition/                               Accumulated   Acquisition(A)/     Square
Property Location    Land   Improvements  Improvement    Land   Building   Total    Depreciation Construction(C)(1)    Feet
- -----------------  -------- ------------ ------------- -------- -------- ---------- ------------ ------------------ ----------
                                                             (dollars in thousands)
<S>                <C>      <C>          <C>           <C>      <C>      <C>        <C>          <C>                <C>
1900 Aerojet Way
 Las Vegas,
 Nevada..........  $    644   $  4,093     $      8    $    645 $  4,100 $    4,745   $    254          1997(A)        106,717
Dimension
 Business Park
 Lake Forest,
 California......     1,606      1,945           64       1,608    2,007      3,615        124          1997(A)         45,257
Giltspur Building
 Garden Grove,
 California......       854      3,843        1,047         853    4,891      5,744        412          1997(A)        110,220
Alton Business
 Center
 Irvine,
 California......     5,130      7,465          198       5,130    7,663     12,793        518          1998(A)        143,117
Fortune Business
 Center
 San Jose,
 California......     9,544     18,424        1,047       9,544   19,471     29,015      1,089          1998(A)        235,251
795 Trademark
 Drive
 Reno, Nevada....     1,731      5,193           11       1,734    5,201      6,935        285          1998(A)         75,257
1250 N. Tustin
 Avenue
 Anaheim,
 California......     2,098      4,158                    2,098    4,158      6,256        198          1998(A)         84,185
2911 Dow Avenue
 Tustin,
 California......     1,124      2,408            2       1,124    2,410      3,534        109          1998(A)         54,720
5759 Fleet Street
 Carlsbad,
  California.....     3,112      7,702           24       3,119    7,719     10,838        221          1998(A)         82,923
892/909 Towne
 Center Drive
 Foothill Ranch,
 California......     3,334      8,243        4,714       4,949   11,342     16,291        730          1998(C)        303,327
3250 E. Carpenter
 Avenue
 Anaheim,
 California......                             2,298                2,298      2,298        112          1998(C)         41,225
925 & 1075
 Lambert Road
 Brea,
 California......     3,326      7,020        1,783       3,326    8,803     12,129        217          1999(C)        178,811
Anaheim
 Technology
 Center--Phase I
 Anaheim,
  California.....     6,682     12,249        1,685       6,682   13,934     20,616        465          1998(C)        113,248
Anaheim
 Technology
 Center--Phase II
 Anaheim,
  California.....     3,966      7,972        2,424       3,966   10,396     14,362        266          1999(C)        480,744
                   --------   --------     --------    -------- -------- ----------   --------                      ----------
TOTAL INDUSTRIAL
  PROPERTIES.....  $116,480   $247,491     $ 35,426    $116,146 $283,251 $  399,397   $ 37,861                       6,477,132
                   --------   --------     --------    -------- -------- ----------   --------                      ----------
TOTAL ALL
 PROPERTIES......  $274,305   $798,413     $147,875    $274,463 $946,130 $1,220,593   $174,427                      12,625,117
                   ========   ========     ========    ======== ======== ==========   ========                      ==========
</TABLE>
- -------
(1)  Represents date of construction or acquisition by the Company, or the
     Company's Predecessor, the Kilroy Group.

(2)  These costs represent infrastructure costs incurred in 1989.

(3)  During 1999, a portion of vacant land at this project was reclassified
     into underdeveloped land and construction in progress as the Company was
     actively pursuing development on the land.

  The aggregate gross cost of property included above for federal income tax
purposes, approximated $1.1 billion as of December 31, 1999.

                                      F-36
<PAGE>

                     KILROY REALTY CORPORATION CONSOLIDATED
                           AND KILROY GROUP COMBINED

      NOTES TO CONSOLIDATED AND COMBINED FINANCIAL STATEMENTS--(Continued)


   The following table reconciles the historical cost of the total investment
in real estate, net from January 1, 1997 to December 31, 1999:

<TABLE>
<CAPTION>
                                                    Year Ended December 31,
                                                 ------------------------------
                                                    1999       1998      1997
                                                 ---------- ---------- --------
                                                         (in thousands)
<S>                                              <C>        <C>        <C>
Land, building and improvements, beginning of
 year........................................... $1,081,925 $  800,019 $227,337
  Net additions during period--Acquisition,
   improvements, etc. (net of dispositions).....    138,668    281,906  572,682
                                                 ---------- ---------- --------
Land, building and improvements, end of year....  1,220,593  1,081,925  800,019
                                                 ---------- ---------- --------
Undeveloped land and construction in progress,
 net, beginning of year.........................    112,359     34,671
  Change in undeveloped land and construction in
   progress, net................................     77,286     77,688   34,671
                                                 ---------- ---------- --------
Undeveloped land and construction in progress,
 net, end of year...............................    189,645    112,359   34,671
                                                 ---------- ---------- --------
    Total investment in real estate, net, end of
     year....................................... $1,410,238 $1,194,284 $834,690
                                                 ========== ========== ========
</TABLE>

   The following table reconciles the accumulated depreciation from January 1,
1997 to December 31, 1999:

<TABLE>
<CAPTION>
                                                      Year Ended December 31,
                                                     --------------------------
                                                       1999     1998     1997
                                                     -------- -------- --------
                                                           (in thousands)
   <S>                                               <C>      <C>      <C>
   Beginning of year................................ $145,347 $121,780 $109,668
     Additions during period--Depreciation and
      amortization for the year.....................   29,080   23,657   12,112
                                                     -------- -------- --------
   End of year...................................... $174,427 $145,437 $121,780
                                                     ======== ======== ========
</TABLE>

                                      F-37
<PAGE>

        KILROY REALTY CORPORATION CONSOLIDATED AND KILROY GROUP COMBINED

                 SCHEDULE II--VALUATION AND QUALIFYING ACCOUNTS

                   Year Ended December 31, 1999 and 1998 and
               Period from February 1, 1997 to December 31, 1997,
                   Period from January 1, 1997 to January 31,
                                 (in thousands)

<TABLE>
<CAPTION>
                                                Charged to
                                                Costs and
                                     Balance at  Expenses              Balance
                                     Beginning  or Rental              at End
                                     of Period   Revenue   Deductions of Period
                                     ---------- ---------- ---------- ---------
<S>                                  <C>        <C>        <C>        <C>
Year ended December 31, 1999--
 Allowance for uncollectible tenant
 receivables and unbilled deferred
 rent..............................    $1,456     $2,158    $  (921)   $2,693
                                       ======     ======    =======    ======
Year ended December 31, 1998--
 Allowance for uncollectible tenant
 receivables and unbilled deferred
 rent..............................    $1,136     $1,107    $  (787)   $1,456
                                       ======     ======    =======    ======
February 1, 1997 to December 31,
 1997--Allowance for uncollectible
 tenant receivables and unbilled
 deferred rent.....................    $1,675     $1,028    $(1,567)   $1,136
                                       ======     ======    =======    ======
January 1, 1997 to January 31,
 1997--Allowance for uncollectible
 tenant receivables and unbilled
 deferred rent.....................    $1,628     $   50    $    (3)   $1,675
                                       ======     ======    =======    ======
Year Ended December 31, 1999--
 Allowance for potentially
 unrecoverable pre-development
 costs.............................    $1,700               $  (997)   $  703
                                       ======               =======    ======
Year Ended December 31, 1998--
 Allowance for potentially
 unrecoverable pre-development
 costs.............................               $1,700               $1,700
                                                  ======               ======
</TABLE>

                                      F-38
<PAGE>

                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
                                                                   Sequentially
 Exhibit                                                             Numbered
 Number                        Description                             Page
 -------                       -----------                         ------------
 <C>     <S>                                                       <C>
  3.1    Articles of Amendment and Restatement of the
          Registrant(1)

  3.2    Amended and Restated Bylaws of the Registrant(1)

  3.3    Form of Certificate for Common Stock of the
          Registrant(1)

  3.4    Articles Supplementary of the Registrant designating
          8.075% Series A Cumulative Redeemable Preferred
          Stock(10)

  3.5    Articles Supplementary of the Registrant, designating
          8.075% Series A Cumulative Redeemable Preferred
          Stock(13)

  3.6    Articles Supplementary of the Registrant designating
          its Series B Junior Participating Preferred Stock (to
          be filed by amendment)

  3.7    Articles Supplementary of the Registrant designating
          its 9.375% Series C Cumulative Redeemable Preferred
          Stock(15)

 *3.8    Articles Supplementary of the Registrant designating
          its 9.250% Series D Cumulative Redeemable Preferred
          Stock

  4.1    Registration Rights Agreement, dated January 31,
          1998(1)

  4.2    Registration Rights Agreement, dated February 6,
          1999(10)

  4.3    Registration Rights Agreement, dated April 20, 1999(13)

  4.4    Registration Rights Agreement, dated November 24,
          1999(15)

  4.5    Registration Rights Agreement, dated as of October 31,
          1998(7)

  4.6    Rights Agreement, dated as of October 2, 1999 between
          Kilroy Realty Corporation and ChaseMellon Shareholder
          Services, L.L.C., as Rights Agent, which includes the
          form of Articles Supplementary of the Series B Junior
          Participating Preferred Stock of Kilroy Realty
          Corporation as Exhibit A, the form of Right
          Certificate as Exhibit B and the Summary of Rights to
          Purchase Preferred Shares as Exhibit C(16)

 *4.7    Registration Rights Agreement, dated as of December 9,
          1999

 10.1    Fourth Amended and Restated Agreement of Limited
          Partnership of Kilroy Realty, L.P., dated November 24,
          1999(15)

 10.2    Omnibus Agreement, dated as of October 30, 1996, by and
          among Kilroy Realty, L.P. and the parties named
          therein(1)

 10.3    Supplemental Representations, Warranties and Indemnity
          Agreement by and among Kilroy Realty, L.P. and the
          parties named therein(1)

 10.4    Pledge Agreement by and among Kilroy Realty, L.P., John
          B. Kilroy, Sr., John B. Kilroy, Jr. and Kilroy
          Industries(1)

 10.5    1998 Stock Option and Incentive Plan of the Registrant
          and Kilroy Realty, L.P(1)

 10.6    Form of Indemnity Agreement of the Registrant and
          Kilroy Realty, L.P. with certain officers and
          directors(1)

 10.7    Lease Agreement, dated January 24, 1989, by and between
          Kilroy Long Beach Associates and the City of Long
          Beach for Kilroy Long Beach Phase I(1)

 10.8    First Amendment to Lease Agreement, dated December 28,
          1990, by and between Kilroy Long Beach Associates and
          the City of Long Beach for Kilroy Long Beach Phase I(1)

 10.9    Lease Agreement, dated July 17, 1985, by and between
          Kilroy Long Beach Associates and the City of Long
          Beach for Kilroy Long Beach Phase III(1)
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
                                                                   Sequentially
 Exhibit                                                             Numbered
 Number                        Description                             Page
 -------                       -----------                         ------------

 <C>     <S>                                                       <C>
 10.10   Lease Agreement, dated April 21, 1988, by and between
          Kilroy Long Beach Associates and the Board of Water
          Commissioners of the City of Long Beach, acting for
          and on behalf of the City of Long Beach, for Long
          Beach Phase IV(1)

 10.11   Lease Agreement, dated December 30, 1988, by and
          between Kilroy Long Beach Associates and City of Long
          Beach for Kilroy Long Beach Phase II(1)

 10.12   First Amendment to Lease, dated January 24, 1989, by
          and between Kilroy Long Beach Associates and the City
          of Long Beach for Kilroy Long Beach Phase III(1)

 10.13   Second Amendment to Lease Agreement, dated December 28,
          1990, by and between Kilroy Long Beach Associates and
          the City of Long Beach for Kilroy Long Beach Phase
          III(1)

 10.14   First Amendment to Lease Agreement, dated December 28,
          1990, by and between Kilroy Long Beach Associates and
          the City of Long Beach for Kilroy Long Beach Phase
          II(1)

 10.15   Third Amendment to Lease Agreement, dated October 10,
          1994, by and between Kilroy Long Beach Associates and
          the City of Long Beach for Kilroy Long Beach Phase
          III(1)

 10.16   Development Agreement by and between Kilroy Long Beach
          Associates and the City of Long Beach(1)

 10.17   Amendment No. 1 to Development Agreement by and between
          Kilroy Long Beach Associates and the City of Long
          Beach(1)

 10.18   Ground Lease by and between Frederick Boysen and Ted
          Boysen and Kilroy Industries, dated May 15, 1969, for
          SeaTac Office Center(1)

 10.19   Amendment No. 1 to Ground Lease and Grant of Easement,
          dated April 27, 1973, among Frederick Boysen and
          Dorothy Boysen, Ted Boysen and Rose Boysen and Sea/Tac
          Properties(1)

 10.20   Amendment No. 2 to Ground Lease and Grant of Easement,
          dated May 17, 1977, among Frederick Boysen and Dorothy
          Boysen, Ted Boysen and Rose Boysen and Sea/Tac
          Properties(1)

 10.21   Airspace Lease, dated July 10, 1980, by and among the
          Washington State Department of Transportation, as
          lessor, and Sea Tac Properties, Ltd. and Kilroy
          Industries, as lessee(1)

 10.22   Lease, dated April 1, 1980, by and among Bow Lake,
          Inc., as lessor, and Kilroy Industries and SeaTac
          Properties, Ltd., as lessees for Sea/Tac Office
          Center(1)

 10.23   Amendment No. 1 to Ground Lease, dated September 17,
          1990, between Bow Lake, Inc., as lessor, and Kilroy
          Industries and Sea/Tac Properties, Ltd., as lessee(1)

 10.24   Amendment No. 2 to Ground Lease, dated March 21, 1991,
          between Bow Lake, Inc., as lessor, and Kilroy
          Industries and Sea/Tac Properties, Ltd., as lessee(1)

 10.25   Property Management Agreement between Kilroy Realty
          Finance Partnership, L.P. and Kilroy Realty, L.P.(1)

 10.26   Environmental Indemnity Agreement(1)

 10.27   Option Agreement by and between Kilroy Realty, L.P. and
          Kilroy Airport Imperial Co.(1)

 10.28   Option Agreement by and between Kilroy Realty, L.P. and
          Kilroy Calabasas Associates(1)

 10.29   Employment Agreement between the Registrant and John B.
          Kilroy, Jr.(1)

 10.30   Employment Agreement between the Registrant and Richard
          E. Moran Jr.(1)
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
                                                                   Sequentially
 Exhibit                                                             Numbered
 Number                        Description                             Page
 -------                       -----------                         ------------

 <C>     <S>                                                       <C>
 10.31   Employment Agreement between the Registrant and Jeffrey
          C. Hawken(1)

 10.32   Employment Agreement between the Registrant and C. Hugh
          Greenup(1)

 10.33   Noncompetition Agreement by and between the Registrant
          and John B. Kilroy, Sr.(1)

 10.34   Noncompetition Agreement by and between the Registrant
          and John B. Kilroy, Jr.(1)

 10.35   License Agreement by and among the Registrant and the
          other persons named therein(1)

 10.36   Form of Indenture of Mortgage, Deed of Trust, Security
          Agreement, Financing Statement, Fixture Filing and
          Assignment of Leases, Rents and Security Deposits(1)

 10.37   Mortgage Note(1)

 10.38   Indemnity Agreement(1)

 10.39   Assignment of Leases, Rents and Security Deposits(1)

 10.40   Variable Interest Rate Indenture of Mortgage, Deed of
          Trust, Security Agreement, Financing Statement,
          Fixture Filing and Assignment of Leases and Rents(1)

 10.41   Environmental Indemnity Agreement(1)

 10.42   Assignment, Rents and Security Deposits(1)

 10.43   Form of Mortgage, Deed of Trust, Security Agreement,
          Financing Statement, Fixture Filing and Assignment of
          Leases and Rents(1)

 10.44   Assignment of Leases, Rents and Security Deposits(1)

 10.45   Purchase and Sale Agreement and Joint Escrow
          Instructions, dated April 30, 1998, by and between
          Mission Land Company, Mission-Vacaville, L.P. and
          Kilroy Realty, L.P.(2)

 10.46   Agreement of Purchase and Sale and Joint Escrow
          Instructions, dated April 30, 1998, by and between
          Camarillo Partners and Kilroy Realty, L.P.(2)

 10.47   Purchase and Sale Agreement and Escrow Instructions,
          dated May 5, 1998, by and between Kilroy Realty, L.P.
          and Pullman Carnegie Associates(4)

 10.48   Amendment to Purchase and Sale Agreement and Escrow
          Instructions, dated June 27, 1998, by and between
          Pullman Carnegie Associates and Kilroy Realty, L.P.(4)

 10.49   Purchase and Sale Agreement, Contribution Agreement and
          Joint Escrow Instructions, dated May 12, 1998, by and
          between Shidler West Acquisition Company, LLC and
          Kilroy Realty, L.P.(3)

 10.50   First Amendment to Purchase and Sale Agreement,
          Contribution Agreement and Joint Escrow Instructions,
          dated June 6, 1998, between Kilroy Realty, L.P. and
          Shidler West Acquisition Company, L.L.C. and Kilroy
          Realty, L.P.(3)

 10.51   Second Amendment to Purchase and Sale Agreement,
          Contribution Agreement and Joint Escrow Instructions,
          dated June 12, 1998, by and between Shidler West
          Acquisition Company, LLC and Kilroy Realty, L.P.(3)

 10.52   Agreement of Purchase and Sale and Joint Escrow
          Instructions, dated June 12, 1998, by and between
          Mazda Motor of America, Inc. and Kilroy Realty, L.P.(4)

 10.53   Amendment to Agreement of Purchase and Sale and Joint
          Escrow Instructions, dated June 30, 1998, by and
          between Mazda Motor of America, Inc. and Kilroy
          Realty, L.P.(4)

 10.54   Agreement for Purchase and Sale of 2100 Colorado
          Avenue, Santa Monica, California, dated June 16, 1998,
          by and between Santa Monica Number Seven Associates
          L.P. and Kilroy Realty L.P.(4)
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
                                                                   Sequentially
 Exhibit                                                             Numbered
 Number                        Description                             Page
 -------                       -----------                         ------------

 <C>     <S>                                                       <C>
 10.55   Second Amendment to Credit Agreement and First
          Amendment to Variable Interest Rate Indenture of
          Mortgage, Deed of Trust, Security Agreement, Financing
          Statement, Fixture Filing and Assignment of Leases and
          Rent dated August 13, 1998(5)

 10.56   Purchase and Sale Agreement and Joint Escrow
          Instructions, dated July 10, 1998, by and between
          Kilroy Realty, L.P. and Mission Square Partners(6)

 10.57   First Amendment to the Purchase and Sale Agreement and
          Joint Escrow Instructions, dated July 10, 1998, by and
          between Kilroy Realty, L.P. and Mission Square
          Partners, dated August 22, 1998(6)

 10.58   Second Amendment to the Purchase and Sale Agreement and
          Joint Escrow Instructions, dated July 10, 1998, by and
          between Kilroy Realty, L.P. and Mission Square
          Partners, dated September 5, 1998(6)

 10.59   Third Amendment to the Purchase and Sale Agreement and
          Joint Escrow Instructions, dated July 10, 1998, by and
          between Kilroy Realty, L.P. and Mission Square
          Partners, dated September 19, 1998(6)

 10.60   Fourth Amendment to the Purchase and Sale Agreement and
          Joint Escrow Instructions, dated July 10, 1998, by and
          between Kilroy Realty, L.P. and Mission Square
          Partners, dated September 22, 1998(6)

 10.61   Fifth Amendment to the Purchase and Sale Agreement and
          Joint Escrow Instructions, dated July 10, 1998, by and
          between Kilroy Realty, L.P. and Mission Square
          Partners, dated September 23, 1998(6)

 10.62   Sixth Amendment to the Purchase and Sale Agreement and
          Joint Escrow Instructions, dated July 10, 1998, by and
          between Kilroy Realty, L.P. and Mission Square
          Partners, dated September 25, 1998(6)

 10.63   Seventh Amendment to the Purchase and Sale Agreement
          and Joint Escrow Instructions, dated July 10, 1998, by
          and between Kilroy Realty, L.P. and Mission Square
          Partners, dated September 29, 1998(6)

 10.64   Eighth Amendment to the Purchase and Sale Agreement and
          Joint Escrow Instructions, dated July 10, 1998, by and
          between Kilroy Realty, L.P. and Mission Square
          Partners, dated October 2, 1998(6)

 10.65   Ninth Amendment to the Purchase and Sale Agreement and
          Joint Escrow Instructions, dated July 10, 1998, by and
          between Kilroy Realty, L.P. and Mission Square
          Partners, dated October 24, 1998(6)

 10.66   Contribution Agreement, dated October 21, 1998, by and
          between Kilroy Realty, L.P. and Kilroy Realty
          Corporation and The Allen Group and the Allens(8)

 10.67   Purchase and Sale Agreement and Escrow Instructions,
          dated December 11, 1998, by and between Kilroy Realty,
          L.P. and Swede-Cal Properties, Inc., Viking Investors
          of Southern California, L.P. and Viking Investors of
          Southern California II, L.P.(9)

 10.68   Amendment to the Contribution Agreement, dated October
          14, 1999, by and between Kilroy Realty, L.P. and
          Kilroy Realty Corporation and The Allen Group and the
          Allens, dated October 21, 1998(15)

 10.69   Amended and Restated Revolving Credit Agreement, dated
          as of October 8, 1999 among Kilroy Realty, L.P.,
          Morgan Guaranty Trust Company of New York, as Bank and
          as Lead Agent for the Banks, and the Banks listed
          therein.(14)

 10.70   Amended and Restated Guaranty of Payment, dated as of
          October 8, 1999, between Kilroy Realty Corporation and
          Morgan Guaranty Trust Company of New York.(14)
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
                                                                   Sequentially
 Exhibit                                                             Numbered
 Number                        Description                             Page
 -------                       -----------                         ------------

 <C>     <S>                                                       <C>
  10.71  Promissory Notes Aggregating $95.0 Million Payable to
          Teachers Insurance and Annuity Association of
          America(18)

  10.72  Form of Deed of Trust, Assignment of Leases and Rents,
          Security Agreement and Fixture Filing Statement
          Securing Promissory Notes Payable to Teachers
          Insurance and Annuity Association of America(18)

  10.73  Second Amended and Restated Revolving Credit Agreement
          and Form of Notes Aggregating $400 million(19)

  10.74  Second Amended and Restated Guaranty of Payment(19)

  10.75  Credit Agreement and Form of Promissory Notes
          Aggregating $90.0 million(19)

  10.76  Variable Interest Rate Deed of Trust, Leasehold Deed of
          Trust, Assignment of Rents, Security Agreement and
          Fixture Filing(19)

  10.77  Guaranty of Recourse Obligations of Borrowing(19)

 *10.78  First Amendment to Fourth Amended and Restated
          Agreement of Limited Partnership of Kilroy Realty,
          L.P., dated December 9, 1999

  21.1   List of Subsidiaries of the Registrant(17)

 *23.1   Consent of Deloitte & Touche LLP

 *24.1   Power of Attorney (included in the signature page of
          this Form 10-K)

 *27.1   Financial Data Schedule
</TABLE>
- --------
 *   Filed herewith

**   Previously filed

 (1) Previously filed as an exhibit to the Registration Statement on Form S-11
     (No. 333-15553) as declared effective in January 28, 1998 and incorporated
     herein by reference.

 (2) Previously filed as exhibit 10.11 and 10.12, respectively, to the Current
     Report on Form 8-K, dated May 22, 1998, and incorporated herein by
     reference.

 (3) Previously filed as exhibit 10.57, 10.58 and 10.59, respectively, to the
     Current Report on Form 8-K, dated June 30, 1998, and incorporated herein
     by reference.

 (4) Previously filed as exhibit 10.54, 10.59, 10.60, 10.61 and 10.62,
     respectively, to the Current Report on Form 8-K, dated June 30, 1998, and
     incorporated herein by reference.

 (5) Previously filed as an exhibit to the Registration Statement on Form S-11
     (No. 333-32261), and incorporated herein by reference.

 (6) Previously filed as an exhibit on Form 10-Q, for the quarterly period
     ended September 30, 1998, and incorporated herein by reference.

 (7) Previously filed as an exhibit to the Current Report on Form 8-K/A, dated
     October 29, 1998, and incorporated herein by reference.

 (8) Previously filed as exhibit 10.70 and 10.71, respectively, to the Current
     Report on Form 8-K, dated November 7, 1998, and incorporated herein by
     reference.

 (9) Previously filed as exhibit 10.70 to the Current Report on Form 8-K, dated
     December 17, 1998, and incorporated herein by reference.

(10) Previously filed as an exhibit to the Registrant's Current Report on Form
     8-K dated February 6, 1999 and incorporated herein by reference.

(11) Previously filed as an exhibits to the Current Report on Form 8-K (No. 1-
     12675) dated October 2, 1999 and incorporated herein by reference.
<PAGE>

(12) Previously filed as an exhibit to the Current Report on Form 8-K (No. 1-
     12675) dated October 29, 1998 and incorporated herein by reference.

(13) Previously filed as an exhibit to the Current Report on Form 8-K (No. 1-
     12675) dated April 20, 1999 and incorporated herein by reference.

(14) Previously filed as an exhibit on Form 10-Q (No. 1-12675) for the
     quarterly period ended September 30, 1999 and incorporated herein by
     reference.

(15) Previously filed as an exhibit to the Current Report on Form 8-K (No. 1-
     12675) dated November 24, 1999 and incorporated herein by reference.

(16) Previously filed as an exhibit to the Current Report on Form 8-K (No. 1-
     12675) dated October 2, 1999 and incorporated herein by reference.

(17) Previously filed as an exhibit to the Registration Statement on Form S-11
     (No. 333-15553) and incorporated herein by reference.

(18) Previously filed as an exhibit on Form 10-Q, for the quarterly period
     ended March 31, 1999, and incorporated herein by reference.

(19) Previously filed as an exhibit on Form 10-Q, for the quarterly period
     ended September 30, 1999, and incorporated herein by reference.

   (b) Reports on Form 8K

   The Company filed the Current Report on Form 8-K (No. 1-12675) dated
December 9, 1999 in connection with the announcement of the Company's up to
3.0 million share repurchase program.

<PAGE>

                                                                     EXHIBIT 3.8

                           KILROY REALTY CORPORATION

                             ARTICLES SUPPLEMENTARY

                               780,000 SHARES OF

             9 1/4% SERIES D CUMULATIVE REDEEMABLE PREFERRED STOCK

          Kilroy Realty Corporation, a Maryland corporation (the "Company"),
hereby certifies to the State Department of Assessments and Taxation of Maryland
(the "Department") that:

          First: Pursuant to the authority expressly vested in the Board of
          -----
Directors of the Company by Article IV of the Articles of Amendment and
Restatement of the Company filed with the Department on January 21, 1997, which
comprises, together with the Articles Supplementary (the "Series A Articles
                                                          -----------------
Supplementary") filed by the Company on February 6, 1998 and April 20, 1998
- -------------
establishing a class of preferred stock of the Company, par value $0.01
Preferred Stock (the "Preferred Stock"), designated as the "8.073% Series A
                      ---------------
Cumulative Redeemable Preferred Stock" (the "Series A Preferred Stock"), the
                                             ------------------------
Articles Supplementary (the "Series B Articles Supplementary") filed by the
                             -------------------------------
Company on October 15, 1998, establishing a class of Preferred Stock designated
as the Series B Junior Participating Preferred Stock (the "Series B Preferred
                                                           ------------------
Stock"), the Articles Supplementary (the "Series C Articles Supplementary")
- -----                                     -------------------------------
filed by the Company on November 25, 1998, establishing a class of Preferred
Stock designated as the "9 3/8% Series C Cumulative Redeemable Preferred Stock"
(the "Series C Preferred Stock") and these Articles Supplementary, the charter
      ------------------------
(collectively, the "Charter") and Section 2-105 of the Maryland General
                    -------
Corporation Law (the "MGCL"), the Board of Directors of the Company (the "Board
                      ----
of Directors"), by resolutions duly adopted on October 8, 1999, has classified
up to 1,000,000 shares of the authorized but unissued Preferred Stock as a
separate class of Preferred Stock, authorized the issuance of a maximum of
1,000,000 shares of such class of Preferred Stock, set certain of the
preferences, conversion and other rights, voting powers, restrictions,
limitations as to dividends and other distributions, qualifications, terms and
conditions of redemption and other terms and conditions of such class of
Preferred Stock, and pursuant to the powers contained in the Bylaws of the
Company and the MGCL, appointed a committee (the "Committee") of the Board of
                                                  ---------
Directors and delegated to the Committee, to the fullest extent permitted by the
MGCL and the Charter and Bylaws of the Company, all powers of the Board of
Directors with respect to designating, and setting all other preferences,
conversion and other rights, voting powers, restrictions, limitations as to
dividends and other distributions, qualifications and terms and conditions of
redemption of, such class of Preferred Stock, and determining the number of
shares of such class of Preferred Stock (not in excess of the aforesaid maximum
number) to be issued and the consideration and other terms and conditions upon
which such shares of such class of Preferred Stock are to be issued.

          Second:  Pursuant to the authority conferred upon the Committee as
          ------
aforesaid, the Committee has unanimously adopted resolutions designating the
aforesaid class of Preferred Stock as the "9 1/4% Series D Cumulative Redeemable
Preferred Stock," setting the preferences, conversion and other rights, voting
powers, restrictions, limitations as to dividends, qualifications, terms and
conditions of redemption and other terms and conditions of such 9
<PAGE>

1/4% Series D Cumulative Redeemable Preferred Stock (to the extent not set by
the Board of Directors in the resolutions referred to in Article First of these
Articles Supplementary) and authorizing the issuance of up to 780,000 shares of
9 1/4% Series D Cumulative Redeemable Preferred Stock.

          Third:  The class of Preferred Stock of the Company created by the
          -----
resolutions duly adopted by the Board of Directors of the Company and by the
Committee and referred to in Articles First and Second of these Articles
                                      -----     ------
Supplementary shall have the following designation, number of shares,
preferences, conversion and other rights, voting powers, restrictions and
limitation as to dividends and other distributions, qualifications, terms and
conditions of redemption and other terms and conditions:

          Section 1. Designation and Number. A series of Preferred Stock,
                     ----------------------
designated the "9 1/4% Series D Cumulative Redeemable Preferred Stock" (the
"Series D Preferred Stock") is hereby established. The number of shares of
 ------------------------
Series D Preferred Stock shall be 780,000.

          Section 2.  Rank.  The Series D Preferred Stock will, with respect to
                      ----
distributions and rights upon voluntary or involuntary liquidation, winding-up
or dissolution of the Company, rank senior to all classes or series of Common
Stock (as defined in the Charter), the Series B Preferred Stock and to all
classes or series of equity securities of the Company now or hereafter
authorized, issued or outstanding, other than the Series A Preferred Stock,
Series C Preferred Stock and any class or series of equity securities of the
Company expressly designated as ranking on a parity with or senior to the Series
D Preferred Stock as to distributions or rights upon voluntary or involuntary
liquidation, winding-up or dissolution of the Company. For purposes of these
Articles Supplementary, the term "Parity Preferred Stock" shall be used to refer
to the Series A Preferred Stock, the Series C Preferred Stock and any class or
series of equity securities of the Company now or hereafter authorized, issued
or outstanding expressly designated by the Company to rank on a parity with
Series D Preferred Stock with respect to distributions or rights upon voluntary
or involuntary liquidation, winding-up or dissolution of the Company, or both,
as the context may require. The term "equity securities" does not include debt
securities, which will rank senior to the Series D Preferred Stock prior to
conversion.

          Section 3.  Distributions.
                      -------------

                 (a)  Payment of Distributions. Subject to the rights of holders
                      ------------------------
     of Parity Preferred Stock as to the payment of distributions and holders of
     equity securities ranking senior to the Series D Preferred Stock as to
     payment of distributions, holders of Series D Preferred Stock will be
     entitled to receive, when, as and if declared by the Company, out of funds
     legally available for the payment of distributions, cumulative preferential
     cash distributions at the rate per annum of 9 1/4% of the $50 liquidation
     preference per share of Series D Preferred Stock. All distributions shall
     be cumulative, shall accrue from the original date of issuance and shall be
     payable (i) quarterly (such quarterly periods for purposes of payment and
     accrual will be the quarterly periods ending on the dates specified in this
     sentence and not calendar quarters) in arrears, on February 15, May 15,
     August 15 and November 15 of each year, commencing on the first of such
     dates to occur after the original date of issuance and, (ii) in the event
     of a redemption, on the redemption

                                       2
<PAGE>

     date (each a "Preferred Stock Distribution Payment Date"). The amount of
                   -----------------------------------------
     the distribution payable for any period will be computed based on the ratio
     of a 360-day year of twelve 30-day months and for any period shorter than a
     full quarterly period for which distributions are computed, the amount of
     the distribution payable will be computed on the basis of the actual number
     of days elapsed in such a period to ninety (90) days. If any date on which
     distributions are to be made on the Series D Preferred Stock is not a
     Business Day (as defined herein), then payment of the distribution to be
     made on such date will be made on the next succeeding day that is a
     Business Day (and without any interest or other payment in respect of any
     such delay) except that, if such Business Day is in the next succeeding
     calendar year, such payment shall be made on the immediately preceding
     Business Day, in each case with the same force and effect as if made on
     such date. Distributions on the Series D Preferred Stock will be made to
     the holders of record of the Series D Preferred Stock on the relevant
     record dates, which, unless otherwise provided by the Company with respect
     to any distribution, will be fifteen (15) Business Days prior to the
     relevant Preferred Stock Distribution Payment Date (each a "Distribution
                                                                 ------------
     Record Date"). Notwithstanding any provision to the contrary contained
     -----------
     herein, each outstanding share of Series D Preferred Stock shall be
     entitled to receive, and shall receive a dividend with respect to any
     Distribution Record Date equal to the dividend paid with respect to each
     other share of Series D Preferred Stock which is outstanding on such date.
     In addition, notwithstanding anything to the contrary set forth herein,
     each share of Series D Preferred Stock shall also continue to accrue all
     accrued and unpaid distributions up to the Exchange Date on any Series D
     Preference Unit (as defined in the Fourth Amended and Restated Agreement of
     Limited Partnership of Kilroy Realty, L.P., dated as of November 24, 1998,
     as (i) amended by that certain First Amendment to Fourth Amended and
     Restated Agreement of Limited Partnership of Kilroy Realty, L.P., dated as
     of the date hereof, and (ii) supplemented by First Supplement dated January
     6, 1999; Second Supplement dated February 22, 1999; Third Supplement dated
     March 9, 1999; Fourth Supplement dated March 31, 1999; and Fifth Supplement
     dated March 26, 1999, as amended and supplemented, the "Partnership
                                                             -----------
     Agreement"), as amended through the date hereof) validly exchanged into
     ---------
     such share of Series D Preferred Stock in accordance with the provisions of
     such Partnership Agreement.

          The term "Business Day" shall mean each day, other than a Saturday or
                    ------------
a Sunday, which is not a day on which banking institutions in New York, New York
are authorized or required by law, regulation or executive order to close.

               (b)  Limitations on Distributions.  No distributions on the
                    ----------------------------
     Series D Preferred Stock shall be declared or paid or set apart for payment
     by the Company at such time as the terms and provisions of any agreement of
     the Company, including any agreement relating to its indebtedness,
     prohibits such declaration, payment or setting apart for payment or
     provides that such declaration, payment or setting apart for payment would
     constitute a breach thereof or a default thereunder, or if such
     declaration, payment or setting apart for payment shall be restricted or
     prohibited by law.

               (c)  Distributions Cumulative.  Notwithstanding the foregoing,
                    ------------------------
     distributions on the Series D Preferred Stock will accrue whether or not
     declared, whether

                                       3
<PAGE>

     or not the terms and provisions set forth in Section 3(b) hereof at any
     time prohibit the current payment of distributions, whether or not the
     Company has earnings, whether or not there are funds legally available for
     the payment of such distributions and whether or not such distributions are
     authorized or declared. Accrued but unpaid distributions on the Series D
     Preferred Stock will accumulate as of the Preferred Stock Distribution
     Payment Date on which they first become payable. Accumulated and unpaid
     distributions will not bear interest.

               (d)  Priority as to Distributions.
                    ----------------------------

                    (i)   So long as any Series D Preferred Stock is
          outstanding, no distribution of cash or other property shall be
          authorized, declared, paid or set apart for payment on or with respect
          to any class or series of Common Stock or any class or series of other
          stock of the Company ranking junior as to the payment of distributions
          to the Series A Preferred Stock, the Series C Preferred Stock and the
          Series D Preferred Stock (such Common Stock or other junior stock,
          including, without limitation, the Series B Preferred Stock,
          collectively, "Junior Stock"), nor shall any cash or other property be
                         ------------
          set aside for or applied to the purchase, redemption or other
          acquisition for consideration of any Series D Preferred Stock, any
          Parity Preferred Stock as to payment of distributions or any Junior
          Stock, unless, in each case, all distributions accumulated on all
          Series D Preferred Stock and all classes and series of outstanding
          Parity Preferred Stock as to payment of distributions have been paid
          in full. Without limiting Section 6(c) hereof, the foregoing sentence
          will not prohibit (i) distributions payable solely in Junior Stock,
          (ii) the conversion of Junior Stock or Parity Preferred Stock into
          Junior Stock, and (iii) purchase by the Company of such Series D
          Preferred Stock, Parity Preferred Stock as to payment of distributions
          or Junior Stock pursuant to the Charter to the extent required to
          preserve the Company's status as a real estate investment trust.

                    (ii)  So long as distributions have not been paid in full
          (or a sum sufficient for such full payment is not irrevocably
          deposited in trust for immediate payment) upon the Series D Preferred
          Stock, all distributions authorized and declared on the Series D
          Preferred Stock and all classes or series of outstanding Parity
          Preferred Stock (including Series A Preferred Stock and Series C
          Preferred Stock) as to payment of distributions shall be authorized
          and declared so that the amount of distributions authorized and
          declared per share of Series D Preferred Stock and such other classes
          or series of Parity Preferred Stock (including Series A Preferred
          Stock and Series C Preferred Stock) shall in all cases bear to each
          other the same ratio that accrued distributions per share on the
          Series D Preferred Stock and such other classes or series of Parity
          Preferred Stock (including Series A Preferred Stock and Series C
          Preferred Stock) as to payment of distributions (which shall not
          include any accumulation in respect of unpaid distributions for prior
          distribution periods if such class or series of Parity Preferred Stock
          does not have cumulative distribution rights) bear to each other.

                                       4
<PAGE>

               (e)  No Further Rights.  Holders of Series D Preferred Stock
                    -----------------
     shall not be entitled to any distributions, whether payable in cash, other
     property or otherwise, in excess of the full cumulative distributions
     described herein.

               (f)  Capital Gain Dividend.  If, for any taxable year, the
                    ---------------------
     Company elects to designate as a "capital gain dividend" (as defined in
     Section 857 of the Internal Revenue Code of 1986, as amended); any portion
     (the "Capital Gains Amount") of the dividends paid or made available for
     the year to holders of any class or series of stock of the Company, the
     portion of the Capital Gains Amount that shall be allocable to holders of
     the Series D Preferred Stock shall be the amount that the total dividends
     (as determined for federal income tax purposes) paid or made available to
     the holders of the Series D Preferred Stock for the year bears to the
     aggregate amount of dividends (as determined for federal income tax
     purposes) paid or made available to the holders of all classes of series of
     stock of the Company for such year.)

       Section 4.  Liquidation Preference.
                   ----------------------

               (a)  Payment of Liquidating Distributions.  Subject to the rights
                    ------------------------------------
     of holders of Parity Preferred Stock with respect to rights upon any
     voluntary or involuntary liquidation, dissolution or winding-up of the
     Company and subject to equity securities ranking senior to the Series D
     Preferred Stock with respect to rights upon any voluntary or involuntary
     liquidation, dissolution or winding-up of the Company, the holders of
     Series D Preferred Stock shall be entitled to receive out of the assets of
     the Company legally available for distribution or the proceeds thereof,
     after payment or provision for debts and other liabilities of the Company,
     but before any payment or distributions of the assets shall be made to
     holders of Common Stock or any other class or series of stock of the
     Company that ranks junior to the Series D Preferred Stock as to rights upon
     liquidation, dissolution or winding-up of the Company, an amount equal to
     the sum of (i) a liquidation preference of $50 per share of Series D
     Preferred Stock, and (ii) an amount equal to any accumulated and unpaid
     distributions thereon, whether or not declared, to the date of payment. In
     the event that, upon such voluntary or involuntary liquidation, dissolution
     or winding-up, there are insufficient assets to permit full payment of
     liquidating distributions to the holders of Series D Preferred Stock and
     any Parity Preferred Stock as to rights upon liquidation, dissolution or
     winding-up of the Company, all payments of liquidating distributions on the
     Series D Preferred Stock and such Parity Preferred Stock shall be made so
     that the payments on the Series D Preferred Stock and such Parity Preferred
     Stock shall in all cases bear to each other the same ratio that the
     respective rights of the Series D Preferred Stock and such other Parity
     Preferred Stock (which shall not include any accumulation in respect of
     unpaid distributions for prior distribution periods if such Parity
     Preferred Stock does not have cumulative distribution rights) upon
     liquidation, dissolution or winding-up of the Company bear to each other.

               (b)  Notice.  Written notice of any such voluntary or involuntary
                    ------
     liquidation, dissolution or winding-up of the Company, stating the payment
     date or dates when, and the place or places where, the amounts
     distributable in such circumstances shall be payable, shall be given by (i)
     fax and (ii) by first class mail, postage pre-paid, not less than thirty
     (30) and not more than sixty (60) days prior to the payment date stated

                                       5
<PAGE>

     therein, to each record holder of the Series D Preferred Stock at the
     respective addresses of such holders as the same shall appear on the share
     transfer records of the Company.

               (c)  No Further Rights.  After payment of the full amount of the
                    -----------------
     liquidating distributions to which they are entitled, the holders of Series
     D Preferred Stock will have no right or claim to any of the remaining
     assets of the Company.

               (d)  Consolidation, Merger or Certain Other Transactions.  The
                    ---------------------------------------------------
     voluntary sale, conveyance, lease, exchange or transfer (for cash, shares
     of stock, securities or other consideration) of all or substantially all of
     the property or assets of the Company to, or the consolidation or merger or
     other business combination of the Company with or into any corporation,
     trust or other entity (or of any corporation, trust or other entity with or
     into the Company) shall not be deemed to constitute a liquidation,
     dissolution or winding-up of the Company.

               (e)  Permissible Distributions.  In determining whether a
                    -------------------------
     distribution (other than upon voluntary or involuntary liquidation) by
     dividend, redemption or other acquisition of shares of stock of the Company
     or otherwise is permitted under the MGCL, no effect shall be given to
     amounts that would be needed, if the Company were to be dissolved at the
     time of the distribution, to satisfy the preferential rights upon
     dissolution of holders of shares of stock of the Company whose preferential
     rights upon dissolution are superior to those receiving the distribution.

        Section 5.  Optional Redemption.
                    -------------------

               (a)  Right of Optional Redemption. Subject to Section 7, the
                    ----------------------------
     Series D Preferred Stock may not be redeemed prior to December 9, 2004. On
     or after such date, the Company shall have the right to redeem the Series D
     Preferred Stock, in whole or in part, at any time or from time to time,
     upon not less than thirty (30) nor more than sixty (60) days written
     notice, at a redemption price, payable in cash, equal to $50 per share of
     Series D Preferred Stock plus accumulated and unpaid distributions, whether
     or not declared, to the date of redemption. If fewer than all of the
     outstanding shares of Series D Preferred Stock are to be redeemed, the
     shares of Series D Preferred Stock to be redeemed shall be selected pro
     rata (as nearly as practicable without creating fractional units).

               (b)  Limitation on Redemption.
                    ------------------------

                    (i)  The redemption price of the Series D Preferred Stock
          (other than the portion thereof consisting of accumulated but unpaid
          distributions) will be payable solely out of the sale proceeds of
          capital stock of the Company and from no other source. For purposes of
          the preceding sentence, "capital stock" means any equity securities
          (including Common Stock and Preferred Stock), shares, participation or
          other ownership interests (however designated) and any rights (other
          than debt securities convertible into or exchangeable for equity
          securities) or options to purchase any of the foregoing.

                                       6
<PAGE>

                   (ii)  Subject to Section 7 hereof, the Company may not redeem
          fewer than all of the outstanding shares of Series D Preferred Stock
          unless all accumulated and unpaid distributions have been paid on all
          outstanding Series D Preferred Stock for all quarterly distribution
          periods terminating on or prior to the date of redemption.

              (c)  Procedures for Redemption.
                   -------------------------
                   (i)  Notice of redemption will be (i) faxed, and (ii) mailed
          by the Company, postage prepaid, not less than thirty (30) nor more
          than sixty (60) days prior to the redemption date, addressed to the
          respective holders of record of the Series D Preferred Stock to be
          redeemed at their respective addresses as they appear on the transfer
          records of the Company. No failure to give or defect in such notice
          shall affect the validity of the proceedings for the redemption of any
          Series D Preferred Stock except as to the holder to whom such notice
          was defective or not given. In addition to any information required by
          law or by the applicable rules of any exchange upon which the Series D
          Preferred Stock may be listed or admitted to trading, each such notice
          shall state: (i) the redemption date, (ii) the redemption price, (iii)
          the number of shares of Series D Preferred Stock to be redeemed, (iv)
          the place or places where such shares of Series D Preferred Stock are
          to be surrendered for payment of the redemption price, (v) that
          distributions on the Series D Preferred Stock to be redeemed will
          cease to accumulate on such redemption date and (vi) that payment of
          the redemption price and any accumulated and unpaid distributions will
          be made upon presentation and surrender of such Series D Preferred
          Stock. If fewer than all of the shares of Series D Preferred Stock
          held by any holder are to be redeemed, the notice mailed to such
          holder shall also specify the number of shares of Series D Preferred
          Stock held by such holder to be redeemed.

                   (ii) If the Company gives a notice of redemption in respect
          of Series D Preferred Stock (which notice will be irrevocable) then,
          by 12:00 noon, New York City time, on the redemption date, the Company
          will deposit irrevocably in trust for the benefit of the Series D
          Preferred Stock being redeemed funds sufficient to pay the applicable
          redemption price, plus any accumulated and unpaid distributions, if
          any, on such shares to the date fixed for redemption, without
          interest, and will give irrevocable instructions and authority to pay
          such redemption price and any accumulated and unpaid distributions,
          whether or not declared, if any, on such shares to the holders of the
          Series D Preferred Stock upon surrender of the Series D Preferred
          Stock by such holders at the place designated in the notice of
          redemption. If fewer than all Series D Preferred Stock evidenced by
          any certificate is being redeemed, a new certificate shall be issued
          upon surrender of the certificate evidencing all Series D Preferred
          Stock, evidencing the unredeemed Series D Preferred Stock without cost
          to the holder thereof. On and after the date of redemption,
          distributions will cease to accumulate on the Series D Preferred Stock
          or portions thereof called for redemption, unless the Company defaults
          in the payment thereof. If any date fixed for redemption of Series D
          Preferred Stock is not a Business Day, then

                                       7
<PAGE>

     payment of the redemption price payable on such date
     will be made on the next succeeding day that is a Business Day (and without
     any interest or other payment in respect of any such delay) except that, if
     such Business Day falls in the next calendar year, such payment will be
     made on the immediately preceding Business Day, in each case with the same
     force and effect as if made on such date fixed for redemption.  If payment
     of the redemption price  or any accumulated or unpaid distributions in
     respect of the Series D Preferred Stock is improperly withheld or refused
     and not paid by the Company, distributions on such Series D Preferred Stock
     will continue to accumulate from the original redemption date to the date
     of payment, in which case the actual payment date will be considered the
     date fixed for redemption for purposes of calculating the applicable
     redemption price and any accumulated and unpaid distributions.

               (d)  Status of Redeemed Stock. Any Series D Preferred Stock that
                    ------------------------
shall at any time have been redeemed shall after such redemption, have the
status of authorized but unissued Preferred Stock, without designation as to
class or series until such shares are once more designated as part of a
particular class or series by the Board of Directors.

     Section 6.     Voting Rights.
                    -------------

               (a)  General.  Holders of the Series D Preferred Stock will not
                    -------
have any voting rights, except as set forth below.

               (b)  Right to Elect Directors.
                    ------------------------

                    (i)  If at any time full distributions shall not have been
     timely made on any Series D Preferred Stock with respect to any six (6)
     prior quarterly distribution periods, whether or not consecutive, (a
     "Preferred Distribution Default"), the holders of such Series D Preferred
      ------------------------------
     Stock, voting together as a single class with the holders of each class or
     series of Parity Preferred Stock which is on parity with the Series D
     Preferred Stock both as to payment of distributions and as to rights upon
     voluntary or involuntary liquidation, dissolution or winding-up of the
     Company upon which like voting rights have been conferred and are
     exercisable, including the Series A Preferred Stock and the Series C
     Preferred Stock ("Parity Securities"), will have the right to elect two
                       -----------------
     additional directors to serve on the Company's Board of Directors (the
     "Preferred Stock Directors") at a special meeting called in accordance with
      -------------------------
     Section 6(b)(ii) below or at the next annual meeting of stockholders, and
     at each subsequent annual meeting of stockholders or special meeting held
     in place thereof, until all such distributions in arrears and distributions
     for the current quarterly period on the Series D Preferred Stock and each
     such class or series of Parity Preferred Stock, including the Series A
     Preferred Stock and the Series C Preferred Stock, have been paid in full.

                    A distribution in respect of Series D Preferred Stock shall
     be considered timely made if made within two (2) Business Days after
     the applicable

                                       8
<PAGE>

     Preferred Stock Distribution Payment if at the time of such late payment
     date there shall not be any prior quarterly distribution periods in respect
     of which full distributions were not timely made at the applicable
     Preferred Stock Distribution Date.

                    (ii)  At any time when such voting rights shall have vested,
     a proper officer of the Company shall call or cause to be called, upon
     written request of holders of record of at least 10% of the outstanding
     shares of Series D Preferred Stock, a special meeting of the holders of
     Series D Preferred Stock and all the series of Parity Securities by mailing
     or causing to be mailed to such holders a notice of such special meeting to
     be held not less than ten and not more than forty-five (45) days after the
     date such notice is given. The record date for determining holders of the
     Parity Securities entitled to notice of and to vote at such special meeting
     will be the close of business on the third Business Day preceding the day
     on which such notice is mailed. At any such special meeting, all of the
     holders of the Parity Securities, by plurality vote, voting together as a
     single class without regard to series will be entitled to elect two
     directors on the basis of one vote per $50 of liquidation preference to
     which such Parity Securities are entitled by their terms (excluding amounts
     in respect of accumulated and unpaid dividends) and not cumulatively. The
     holder or holders of one-third of the Parity Securities then outstanding,
     present in person or by proxy, will constitute a quorum for the election of
     the Preferred Stock Directors except as otherwise provided by law. Notice
     of all meetings at which holders of the Series D Preferred Stock shall be
     entitled to vote will be given to such holders at their addresses as they
     appear in the transfer records. At any such meeting or adjournment thereof
     in the absence of a quorum, subject to the provisions of any applicable
     law, a majority of the holders of the Parity Securities present in person
     or by proxy shall have the power to adjourn the meeting for the election of
     the Preferred Stock Directors, without notice other than an announcement at
     the meeting, until a quorum is present. If a Preferred Distribution Default
     shall terminate after the notice of a special meeting has been given but
     before such special meeting has been held, the Company shall, as soon as
     practicable after such termination, mail or cause to be mailed notice of
     such termination to holders of the Series D Preferred Stock that would have
     been entitled to vote at such special meeting.

                    (iii) If and when all accumulated distributions and the
     distribution for the current distribution period on the Series D Preferred
     Stock shall have been paid in full or a sum sufficient for such payment is
     irrevocably deposited in trust for payment, the holders of the Series D
     Preferred Stock shall be divested of the voting rights set forth in Section
     6(b) herein (subject to revesting in the event of each and every Preferred
     Distribution Default) and, if all distributions in arrears and the
     distributions for the current distribution period have been paid in full or
     set aside for payment in full on all other classes or series of Securities,
     the term and office of each Preferred Stock Director so elected shall
     terminate. Any Preferred Stock Director may be removed at any time with or
     without cause by the vote of, and shall not be removed otherwise than by
     the vote

                                       9
<PAGE>

     of, the holders of record of a majority of the outstanding Series D
     Preferred Stock when they have the voting rights set forth in Section 6(b)
     (voting separately as a single class with all other classes or series of
     Parity Securities). So long as a Preferred Distribution Default shall
     continue, any vacancy in the office of a Preferred Stock Director may be
     filled by written consent of the Preferred Stock Director remaining in
     office, or if none remains in office, by a vote of the holders of record of
     a majority of the outstanding Series D Preferred Stock when they have the
     voting rights set forth in Section 6(b) (voting separately as a single
     class with all other classes or series of Parity Securities). The Preferred
     Stock Directors shall each be entitled to one vote per director on any
     matter.

              (c)  Certain Voting Rights. So long as any Series D Preferred
                   ---------------------
Stock remains outstanding, the Company shall not, without the affirmative vote
of the holders of at least two-thirds of the Series D Preferred Stock
outstanding at the time (i) designate or create, or increase the authorized or
issued amount of, any class or series of shares ranking prior to the Series D
Preferred Stock with respect to payment of distributions or rights upon
liquidation, dissolution or winding-up or reclassify any authorized shares of
the Company into any such shares, or create, authorize or issue any obligations
or security convertible into or evidencing the right to purchase any such
shares, (ii) designate or create, or increase the authorized or issued amount
of, any Parity Preferred Stock or reclassify any authorized shares of the
Company into any such shares, or create, authorize or issue any obligations or
security convertible into or evidencing the right to purchase any such shares,
but only to the extent such Parity Preferred Stock is issued to an affiliate of
the Company, or (iii) either (A) consolidate, merge into or with, or convey,
transfer or lease its assets substantially as an entirety, to any corporation or
other entity, or (B) amend, alter or repeal the provisions of the Company's
Charter (including these Articles Supplementary) or Bylaws, whether by merger,
consolidation or otherwise, in each case in such a way that would materially and
adversely affect the powers, special rights, preferences, privileges or voting
power of the Series D Preferred Stock or the holders thereof; provided, however,
that with respect to the occurrence of any event set forth in (iii) above, so
long as (a) the Company is the surviving entity and the Series D Preferred Stock
remains outstanding with the terms thereof unchanged, or (b) the resulting,
surviving or transferee entity is a corporation, business trust or other like
entity organized under the laws of any state and substitutes for the Series D
Preferred Stock other preferred stock having substantially the same terms and
same rights as the Series D Preferred Stock, including with respect to
distributions, voting rights and rights upon liquidation, dissolution or
winding-up, then the occurrence of any such event shall not be deemed to
materially and adversely affect the rights, privileges or voting powers of the
holders of the Series D Preferred Stock and provided further that any increase
in the amount of authorized Preferred Stock or the creation or issuance of any
other class or series of Preferred Stock, or any increase in an amount of
authorized shares of each class or series, in each case ranking either (a)
junior to the Series D Preferred Stock with respect to payment of distributions
and the distribution of assets upon liquidation, dissolution or winding-up, or
(b) on a parity with the Series D Preferred Stock with respect to payment of
distributions or the distribution of assets upon liquidation, dissolution or
winding-up to the extent such Preferred Stock is not issued to an affiliate

                                       10
<PAGE>

     of the Company, shall not be deemed to materially and adversely affect such
     rights, preferences, privileges or voting powers.

          Section 7.  Restrictions on Ownership and Transfer to Preserve Tax
                      ------------------------------------------------------
Benefit.
- -------
                (a) Definitions.  For the purposes of this Section 7 of these
                    ----------
Articles Supplementary, the following terms shall have the following meanings:

          "Beneficial Ownership" shall mean ownership of Series D Preferred
           --------------------
Stock by a Person who is or would be treated as an owner of such Series D
Preferred Stock either actually or constructively through the application of
Section 544 of the Code, as modified by Section 856(h)(1)(B) of the Code.  The
terms "Beneficial Owner," "Beneficially Owns" and "Beneficially Owned" shall
have the correlative meanings.

          "Beneficial Ownership Limit" shall mean 7.0% (by value) of the
           --------------------------
outstanding shares of capital stock of the Company.

          "Charitable Beneficiary" shall mean one or more beneficiaries of a
           ----------------------
Trust, as determined pursuant to Section 7(c)(vi) of these Articles
Supplementary, each of which shall be an organization described in Sections
170(b)(1)(A), 170(c)(2) and 501(c)(3) of the Code.

          "Code" shall mean the Internal Revenue Code of 1986, as amended.  All
           ----
section references to the Code shall include any successor provisions thereof as
may be adopted from time to time.

          "Constructive Ownership" shall mean ownership of Series D Preferred
           ----------------------
Stock by a Person who is or would be treated as an owner of such Series D
Preferred Stock either actually or constructively through the application of
Section 318 of the Code, as modified by Section 856(d)(5) of the Code.  The
terms "Constructive Owner," "Constructively Owns" and "Constructively Owned"
shall have the correlative meanings.

          "Constructive Ownership Limit" shall mean 9.8% (by value) of the
           ----------------------------
outstanding shares of capital stock the Company.

          "IRS" means the United States Internal Revenue Service.
           ---

          "Market Price" shall mean the last reported sales price reported on
           ------------
the New York Stock Exchange of the Series D Preferred Stock on the trading day
immediately preceding the relevant date, or if the Series D Preferred Stock is
not then traded on the New York Stock Exchange, the last reported sales price of
the Series D Preferred Stock on the trading day immediately preceding the
relevant date as reported on any exchange or quotation system over which the
Series D Preferred Stock may be traded, or if the Series D Preferred Stock is
not then traded over any exchange or quotation system, the market price of the
Series D Preferred Stock on the relevant date as determined in good faith by the
Board of Directors of the Company.

          "Operating Partnership" shall mean Kilroy Realty, L.P., a Delaware
           ---------------------
limited partnership.

                                       11
<PAGE>

          "Person" shall mean an individual, corporation, partnership, limited
           ------
liability company, estate, trust (including a trust qualified under Section
401(a) or 501(c)(17) of the Code), a portion of a trust permanently set aside
for or to be used exclusively for the purposes described in Section 642(c) of
the Code, association, private foundation within the meaning of Section 509(a)
of the Code, joint stock company or other entity; but does not include an
underwriter acting in a capacity as such in a public offering of shares of
Series D Preferred Stock provided that the ownership of such shares of Series D
Preferred Stock by such underwriter would not result in the Company being
"closely held" within the meaning of Section 856(h) of the Code, or otherwise
result in the Company failing to qualify as a REIT.

          "Purported Beneficial Transferee" shall mean, with respect to any
           -------------------------------
purported Transfer (or other event) which results in a transfer to a Trust, as
provided in Section 7(b)(ii) of these Articles Supplementary, the Purported
Record Transferee, unless the Purported Record Transferee would have acquired or
owned shares of Series D Preferred Stock for another Person who is the
beneficial transferee or owner of such shares, in which case the Purported
Beneficial Transferee shall be such Person.

          "Purported Record Transferee" shall mean, with respect to any
           ---------------------------
purported Transfer (or other event) which results in a transfer to a Trust, as
provided in Section 7(b)(ii) of these Articles Supplementary, the record holder
of the Series D Preferred Stock if such Transfer had been valid under Section
7(b)(i) of these Articles Supplementary.

          "REIT" shall mean a real estate investment trust under Sections 856
           ----
through 860 of the Code and, for purposes of taxation of the Company under
applicable state law, comparable provisions of the law of such state.

          "Restriction Termination Date" shall mean the first day after the date
           ----------------------------
hereof on which the Board of Directors of the Company determines that it is no
longer in the best interests of the Company to attempt to, or continue to,
qualify as a REIT.

          "Transfer" shall mean any sale, transfer, gift, assignment, devise or
           --------
other disposition of Series D Preferred Stock, (including (i) the granting of
any option or entering into any agreement for the sale, transfer or other
disposition of Series D Preferred Stock or (ii) the sale, transfer, assignment
or other disposition of any securities (or rights convertible into or
exchangeable for Series D Preferred Stock)), whether voluntary or involuntary,
whether such transfer has occurred of record or beneficially or Beneficially or
Constructively (including but not limited to transfers of interests in other
entities which result in changes in Beneficial or Constructive Ownership of
Series D Preferred Stock), and whether such transfer has occurred by operation
of law or otherwise.

          "Trust" shall mean each of the trusts provided for in Section 7(c) of
           -----
these Articles Supplementary.

          "Trustee" shall mean any Person unaffiliated with the Company, or a
           -------
Purported Beneficial Transferee, or a Purported Record Transferee, that is
appointed by the Company to serve as trustee of a Trust.

                                       12
<PAGE>

          (b)  Restriction on Ownership and Transfers.
               --------------------------------------

               (i)  Prior to the Restriction Termination Date:

    (1)   except as provided in Section 7(i) of these Articles Supplementary, no
Person shall Beneficially Own Series D Preferred Stock which, taking into
account any other capital stock of the Company Beneficially Owned by such
Person, would cause such ownership to exceed the Beneficial Ownership Limit;

    (2)   except as provided in Section 7(i) of these Articles Supplementary, no
Person shall Constructively Own Series D Preferred Stock which, taking into
account any other capital stock of the Company Constructively Owned by such
Person, would cause such ownership to exceed the Constructive Ownership Limit;

    (3)   no Person shall Beneficially or Constructively Own Series D Preferred
Stock which, taking into account any other capital stock of the Company
Beneficially or Constructively Owned by such Person, would result in the Company
being "closely held" within the meaning of Section 856(h) of the Code, or
otherwise failing to qualify as a REIT (including but not limited to Beneficial
or Constructive Ownership that would result in the Company owning (actually or
Constructively) an interest in a tenant that is described in Section
856(d)(2)(B) of the Code if the income derived by the Company (either directly
or indirectly through one or more partnerships) from such tenant would cause the
Company to fail to satisfy any of the gross income requirements of Section
856(c) of the Code or comparable provisions of state law).

               (ii) If, prior to the Restriction Termination Date, any Transfer
     (whether or not such Transfer is the result of a transaction entered into
     through the facilities of the New York Stock Exchange ("NYSE")) or other
                                                             ----
     event occurs that, if effective, would result in any Person Beneficially or
     Constructively Owning Series D Preferred Stock in violation of Section
     7(b)(i) of these Articles Supplementary, (1) then that number of shares of
     Series D Preferred Stock that otherwise would cause such Person to violate
     Section 7(b)(i) of these Articles Supplementary (rounded up to the nearest
     whole share) shall be automatically transferred to a Trust for the benefit
     of a Charitable Beneficiary, as described in Section 7(c), effective as of
     the close of business on the business day prior to the date of such
     Transfer or other event, and such Purported Beneficial Transferee shall
     thereafter have no rights in such shares or (2) if, for any reason, the
     transfer to the Trust described in clause (1) of this sentence is not
     automatically effective as provided therein to prevent any Person from
     Beneficially or Constructively Owning Series D Preferred Stock in violation
     of Section 7(b)(i) of these Articles Supplementary, then the Transfer of
     that number of shares of Series D Preferred Stock that otherwise would
     cause any Person to violate Section 7(b)(i) shall be void ab initio, and
     the Purported Beneficial Transferee shall have no rights in such shares.

                    (iii) Subject to Section 7(n) of this Article Third and
notwithstanding any other provisions contained herein, prior to the Restriction

                                       13
<PAGE>

         Termination Date, any Transfer of Series D Preferred Stock (whether or
         not such Transfer is the result of a transaction entered into through
         the facilities of the NYSE) that, if effective, would result in the
         capital stock of the Company being beneficially owned by less than 100
         Persons (determined without reference to any rules of attribution)
         shall be void ab initio, and the intended transferee shall acquire no
         rights in such Series D Preferred Stock.

         It is expressly intended that the restrictions on ownership and
Transfer described in this Section 7(b) shall apply to the exchange rights
provided in Section 19.9 of the Partnership Agreement.  Notwithstanding any of
the provisions of the Partnership Agreement to the contrary, a partner of the
Operating Partnership shall not be entitled to effect an exchange of an interest
in the Operating Partnership for Series D Preferred Stock if the actual or
beneficial or Beneficial or Constructive Ownership of Series D Preferred Stock
would be prohibited under the provisions of this Section 7.

              (c)  Transfers of Series D Preferred Stock in Trust.
                   ----------------------------------------------

                   (i)   Upon any purported Transfer or other event described in
         Section 7(b)(ii) of these Articles Supplementary, such Series D
         Preferred Stock shall be deemed to have been transferred to the Trustee
         in his capacity as trustee of a Trust for the exclusive benefit of one
         or more Charitable Beneficiaries. Such transfer to the Trustee shall be
         deemed to be effective as of the close of business on the business day
         prior to the purported Transfer or other event that results in a
         transfer to the Trust pursuant to Section 7(b)(ii). The Trustee shall
         be appointed by the Company and shall be a Person unaffiliated with the
         Company, any Purported Beneficial Transferee, or any Purported Record
         Transferee. Each Charitable Beneficiary shall be designated by the
         Company as provided in Section 7(c)(vi) of these Articles
         Supplementary.

                   (ii)  Series D Preferred Stock held by the Trustee shall be
         issued and outstanding Series D Preferred Stock of the Company. The
         Purported Beneficial Transferee or Purported Record Transferee shall
         have no rights in the shares of the Series D Preferred Stock held by
         the Trustee. The Purported Beneficial Transferee or Purported Record
         Transferee shall not benefit economically from ownership of any shares
         held in trust by the Trustee, shall have no rights to dividends and
         shall not possess any rights to vote or other rights attributable to
         the shares of Series D Preferred Stock held in the Trust.

                   (iii) The Trustee shall have all voting rights and rights to
         dividends with respect to Series D Preferred Stock held in the Trust,
         which rights shall be exercised for the exclusive benefit of the
         Charitable Beneficiary. Any dividend or distribution paid prior to the
         discovery by the Company that shares of Series D Preferred Stock have
         been transferred to the Trustee shall be paid to the Trustee upon
         demand, and any dividend or distribution declared but unpaid shall be
         paid when due to the Trustee with respect to such Series D Preferred
         Stock. Any dividends or distributions so paid over to the Trustee shall
         be held in trust for the Charitable Beneficiary.

                                       14
<PAGE>

          The Purported Record Transferee and Purported Beneficial Transferee
shall have no voting rights with respect to the Series D Preferred Stock held in
the Trust and, subject to Maryland law, effective as of the date the Series D
Preferred Stock has been transferred to the Trustee, the Trustee shall have the
authority (at the Trustee's sole discretion) (i) to rescind as void any vote
cast by a Purported Record Transferee with respect to such Series D Preferred
Stock prior to the discovery by the Company that the Series D Preferred Stock
has been transferred to the Trustee and (ii) to recast such vote in accordance
with the desires of the Trustee acting for the benefit of the Charitable
Beneficiary; provided, however, that if the Company has already taken
irreversible corporate action, then the Trustee shall not have the authority to
rescind and recast such vote.  Notwithstanding any other provision of these
Articles Supplementary to the contrary, until the Company has received
notification that the Series D Preferred Stock has been transferred into a
Trust, the Company shall be entitled to rely on its share transfer and other
stockholder records for purposes of preparing lists of stockholders entitled to
vote at meetings, determining the validity and authority of proxies and
otherwise conducting votes of stockholders.

                     (iv)  Within 20 days of receiving notice from the Company
          that shares of Series D Preferred Stock have been transferred to the
          Trust, the Trustee of the Trust shall sell the shares of Series D
          Preferred Stock held in the Trust to a Person, designated by the
          Trustee, whose ownership of the shares of Series D Preferred Stock
          will not violate the ownership limitations set forth in Section
          7(b)(i). Upon such sale, the interest of the Charitable Beneficiary in
          the shares of Series D Preferred Stock sold shall terminate and the
          Trustee shall distribute the net proceeds of the sale to the Purported
          Record Transferee and to the Charitable Beneficiary as provided in
          this Section 7(c)(iv). The Purported Record Transferee shall receive
          the lesser of (1) the price paid by the Purported Record Transferee
          for the shares of Series D Preferred Stock in the transaction that
          resulted in such transfer to the Trust (or, if the event which
          resulted in the transfer to the Trust did not involve a purchase of
          such shares of Series D Preferred Stock at Market Price, the Market
          Price of such shares of Series D Preferred Stock on the day of the
          event which resulted in the transfer of such shares of Series D
          Preferred Stock to the Trust) and (2) the price per share received by
          the Trustee (net of any commissions and other expenses of sale) from
          the sale or other disposition of the shares of Series D Preferred
          Stock held in the Trust. Any net sales proceeds in excess of the
          amount payable to the Purported Record Transferee shall be immediately
          paid to the Charitable Beneficiary together with any dividends or
          other distributions thereon. If, prior to the discovery by the Company
          that shares of such Series D Preferred Stock have been transferred to
          the Trustee, such shares of Series D Preferred Stock are sold by a
          Purported Record Transferee then (i) such shares of Series D Preferred
          Stock shall be deemed to have been sold on behalf of the Trust and
          (ii) to the extent that the Purported Record Transferee received an
          amount for such shares of Series D Preferred Stock that exceeds the
          amount that such Purported Record Transferee was entitled to receive
          pursuant to this Section 7(c)(iv), such excess shall be paid to the
          Trustee upon demand.

                                       15
<PAGE>

                  (v)  Series D Preferred Stock transferred to the Trustee shall
     be deemed to have been offered for sale to the Company, or its designee, at
     a price per share equal to the lesser of (i) the price paid by the
     Purported Record Transferee for the shares of Series D Preferred Stock in
     the transaction that resulted in such transfer to the Trust (or, if the
     event which resulted in the transfer to the Trust did not involve a
     purchase of such shares of Series D Preferred Stock at Market Price, the
     Market Price of such shares of Series D Preferred Stock on the day of the
     event which resulted in the transfer of such shares of Series D Preferred
     Stock to the Trust) and (ii) the Market Price on the date the Company, or
     its designee, accepts such offer. The Company shall have the right to
     accept such offer until the Trustee has sold the shares of Series D
     Preferred Stock held in the Trust pursuant to Section 7(c)(iv). Upon such a
     sale to the Company, the interest of the Charitable Beneficiary in the
     shares of Series D Preferred Stock sold shall terminate and the Trustee
     shall distribute the net proceeds of the sale to the Purported Record
     Transferee and any dividends or other distributions held by the Trustee
     with respect to such Series D Preferred Stock shall thereupon be paid to
     the Charitable Beneficiary.

                  (vi) By written notice to the Trustee, the Company shall
     designate one or more nonprofit organizations to be the Charitable
     Beneficiary of the interest in the Trust such that the Series D Preferred
     Stock held in the Trust would not violate the restrictions set forth in
     Section 7(b)(i) in the hands of such Charitable Beneficiary.

             (d)  Remedies For Breach.  If the Board of Directors or a committee
                  -------------------
thereof or other designees if permitted by the MGCL shall at any time determine
in good faith that a Transfer or other event has taken place in violation of
Section 7(b) of these Articles Supplementary or that a Person intends to
acquire, has attempted to acquire or may acquire beneficial ownership
(determined without reference to any rules of attribution), Beneficial Ownership
or Constructive Ownership of any shares of Series D Preferred Stock of the
Company in violation of Section 7(b) of these Articles Supplementary, the Board
of Directors or a committee thereof or other designees if permitted by the MGCL
shall take such action as it deems advisable to refuse to give effect or to
prevent such Transfer, including, but not limited to, causing the Company to
redeem shares of Series D Preferred Stock, refusing to give effect to such
Transfer on the books of the Company or instituting proceedings to enjoin such
Transfer; provided, however, that any Transfers (or, in the case of events other
than a Transfer, ownership or Constructive Ownership or Beneficial Ownership) in
violation of Section 7(b)(i) of these Articles Supplementary, shall
automatically result in the transfer to a Trust as described in Section 7(b)(ii)
and any Transfer in violation of Section 7(b)(iii) shall automatically be void
ab initio irrespective of any action (or non-action) by the Board of Directors.

             (e)  Notice of Restricted Transfer. Any Person who acquires or
                  -----------------------------
attempts to acquire shares of Series D Preferred Stock in violation of Section
7(b) of these Articles Supplementary, or any Person who is a Purported
Beneficial Transferee such that an automatic transfer to a Trust results under
Section 7(b)(ii) of these Articles Supplementary, shall immediately give written
notice to the Company of such event and

                                       16
<PAGE>

shall provide to the Company such other information as the Company may request
in order to determine the effect, if any of such Transfer or attempted Transfer
on the Company's status as a REIT.

             (f)  Owners Required To Provide Information. Prior to the
                  --------------------------------------
Restriction Termination Date each Person who is a beneficial owner or Beneficial
Owner or Constructive Owner of Series D Preferred Stock and each Person
(including the shareholder of record) who is holding Series D Preferred Stock
for a beneficial owner or Beneficial Owner or Constructive Owner shall provide
to the Company such information that the Company may request, in good faith, in
order to determine the Company's status as a REIT.

             (g)  Remedies Not Limited.  Nothing contained in these Articles
                  --------------------
Supplementary (but subject to Section 7(n) of these Articles Supplementary)
shall limit the authority of the Board of Directors to take such other action as
it deems necessary or advisable to protect the Company and the interests of its
shareholders by preservation of the Company's status as a REIT.

             (h)  Ambiguity.  In the case of an ambiguity in the application of
                  ---------
any of the provisions of this Section 7 of these Articles Supplementary,
including any definition contained in Section 7(a), the Board of Directors shall
have the power to determine the application of the provisions of this Section 7
with respect to any situation based on the facts known to it (subject, however,
to the provisions of Section 7(n) of these Articles Supplementary). In the event
Section 7 requires an action by the Board of Directors and these Articles
Supplementary fail to provide specific guidance with respect to such action, the
Board of Directors shall have the power to determine the action to be taken so
long as such action is not contrary to the provisions of Section 7. Absent a
decision to the contrary by the Board of Directors (which the Board of Directors
may make in its sole and absolute discretion), if a Person would have (but for
the remedies set forth in Section 7(b)) acquired Beneficial or Constructive
Ownership of Series D Preferred Stock in violation of Section 7(b)(i), such
remedies (as applicable) shall apply first to the shares of Series D Preferred
Stock which, but for such remedies, would have been actually owned by such
Person, and second to shares of Series D Preferred Stock, which, but for such
remedies, would have been Beneficially Owned or Constructively Owned (but not
actually owned) by such Person, pro rata among the Persons who actually own such
shares of Series D Preferred Stock based upon the relative number of the shares
of Series D Preferred Stock held by each such Person.

             (i)  Exceptions.
                  ----------

                  (i)   Subject to Section 7(b)(i)(C), the Board of Directors,
     in its sole discretion, may exempt a Person from the limitation on a Person
     Beneficially Owning shares of Series D Preferred Stock in violation of
     Section 7(b)(i)(A) if the Board of Directors obtains such representations
     and undertakings from such Person as are reasonably necessary in the
     opinion of the Board of Directors to ascertain that no individual's
     Beneficial Ownership of such shares of Series D Preferred Stock will
     violate Section 7(b)(i)(A) or that any such violation will not

                                       17
<PAGE>

     cause the Company to fail to qualify as a REIT under the Code, and agrees
     that any violation of such representations or undertakings (or other action
     which is contrary to the restrictions contained in Section 7(b) of these
     Articles Supplementary) or attempted violation will result in such Series D
     Preferred Stock being transferred to a Trust in accordance with Section
     7(b)(ii) of the Articles Supplementary.

                  (ii)  Subject to Section 7(b)(i)(C), the Board of Directors,
     in its sole discretion, may exempt a Person from the limitation on a Person
     Constructively Owning Series D Preferred Stock in violation of Section
     7(b)(i)(B), if the Company obtains such representations and undertakings
     from such Person as are reasonably necessary in the opinion of the Board of
     Directors to ascertain that such Person does not and will not own, actually
     or Constructively, an interest in a tenant of the Company (or a tenant of
     any entity owned in whole or in part by the Company) that would cause the
     Company to own, actually or Constructively more than a 9.8% interest (as
     set forth in Section 856(d)(2)(B) of the Code) in such tenant and that any
     violation or attempted violation will result in such Series D Preferred
     Stock being transferred to a Trust in accordance with Section 7(b)(ii) of
     these Articles Supplementary. Notwithstanding the foregoing, the inability
     of a Person to make the certification described in this Section 7(i)(ii)
     shall not prevent the Board of Directors, in its sole discretion, from
     exempting such Person from the limitation on a Person Constructively Owning
     Series D Preferred Stock in violation of Section 7(b)(i)(B) if the Board of
     Directors determines that the resulting application of Section 856(d)(2)(B)
     of the Code would affect the characterization of less than 0.5% of the
     gross income (as such term is used in Section 856(c)(2) of the Code) of the
     Company in any taxable year, after taking into account the effect of this
     sentence with respect to all other capital stock of the Company to which
     this sentence applies.

                  (iii) Prior to granting any exception pursuant to Section
     7(i)(i) or (ii) of these Articles Supplementary, the Board of Directors may
     require a ruling from the Internal Revenue Service, or an opinion of
     counsel, in either case in form and substance satisfactory to the Board of
     Directors in its sole discretion, as it may deem necessary or advisable in
     order to determine or ensure the Company's status as a REIT.

             (j)  Legends.  Each certificate for Series D Preferred Stock shall
                  -------
bear substantially the following legends in addition to any legends required to
comply with federal and state securities laws:

             Class of Stock

     "THE COMPANY IS AUTHORIZED TO ISSUE CAPITAL STOCK OF MORE THAN ONE CLASS,
CONSISTING OF COMMON STOCK AND ONE OR MORE CLASSES OF PREFERRED STOCK. THE BOARD
OF DIRECTORS IS AUTHORIZED TO DETERMINE THE PREFERENCES, LIMITATIONS AND
RELATIVE RIGHTS OF ANY

                                       18
<PAGE>

CLASS OF THE PREFERRED STOCK BEFORE THE ISSUANCE OF SHARES OF SUCH CLASS OF
PREFERRED STOCK. THE COMPANY WILL FURNISH, WITHOUT CHARGE, TO ANY STOCKHOLDER
MAKING A WRITTEN REQUEST THEREFOR, A COPY OF THE COMPANY'S CHARTER AND A WRITTEN
STATEMENT OF THE DESIGNATIONS, RELATIVE RIGHTS, PREFERENCES, CONVERSION OR OTHER
RIGHTS, VOTING POWERS, RESTRICTIONS, LIMITATIONS AS TO DIVIDENDS AND OTHER
DISTRIBUTIONS, QUALIFICATIONS AND TERMS AND CONDITIONS OF REDEMPTION OF THE
STOCK OF EACH CLASS WHICH THE COMPANY HAS THE AUTHORITY TO ISSUE AND, IF THE
COMPANY IS AUTHORIZED TO ISSUE ANY PREFERRED OR SPECIAL CLASS AND SERIES, (i)
THE DIFFERENCES IN THE RELATIVE RIGHTS AND PREFERENCES BETWEEN THE SHARES OF
EACH SERIES TO THE EXTENT SET, AND (ii) THE AUTHORITY OF THE BOARD OF DIRECTORS
TO SET SUCH RIGHTS AND PREFERENCES OF SUBSEQUENT SERIES. REQUESTS FOR SUCH
WRITTEN STATEMENT MAY BE DIRECTED TO THE SECRETARY OF THE COMPANY AT ITS
PRINCIPAL OFFICE."

                     Restriction on Ownership and Transfer

          "THE SHARES OF SERIES D PREFERRED STOCK REPRESENTED BY THIS
CERTIFICATE ARE SUBJECT TO RESTRICTIONS ON BENEFICIAL AND CONSTRUCTIVE OWNERSHIP
AND TRANSFER FOR THE PURPOSE OF THE COMPANY'S MAINTENANCE OF ITS STATUS AS A
REAL ESTATE INVESTMENT TRUST UNDER THE INTERNAL REVENUE CODE OF 1986, AS AMENDED
(THE "CODE").  SUBJECT TO CERTAIN FURTHER RESTRICTIONS AND EXCEPT AS EXPRESSLY
PROVIDED IN THE ARTICLES SUPPLEMENTARY FOR THE SERIES D PREFERRED STOCK, (i) NO
PERSON MAY BENEFICIALLY OWN SHARES OF THE COMPANY'S SERIES D PREFERRED STOCK
WHICH, TAKING INTO ACCOUNT ANY OTHER CAPITAL STOCK OF THE COMPANY BENEFICIALLY
OWNED BY SUCH PERSON, WOULD CAUSE SUCH OWNERSHIP TO EXCEED THE BENEFICIAL
OWNERSHIP LIMIT OF 7.0%; (ii) NO PERSON MAY CONSTRUCTIVELY OWN SHARES OF THE
COMPANY'S SERIES D PREFERRED STOCK WHICH, TAKING INTO ACCOUNT ANY OTHER CAPITAL
STOCK OF THE COMPANY CONSTRUCTIVELY OWNED BY SUCH PERSON, WOULD CAUSE SUCH
OWNERSHIP TO EXCEED THE CONSTRUCTIVE OWNERSHIP LIMIT OF 9.8%; (iii) NO PERSON
MAY BENEFICIALLY OR CONSTRUCTIVELY OWN SERIES D PREFERRED STOCK THAT, TAKING
INTO ACCOUNT ANY OTHER CAPITAL STOCK OF THE COMPANY BENEFICIALLY OR
CONSTRUCTIVELY OWNED BY SUCH PERSON, WOULD RESULT IN THE COMPANY BEING "CLOSELY
HELD" UNDER SECTION 856(h) OF THE CODE OR OTHERWISE CAUSE THE COMPANY TO FAIL TO
QUALIFY AS A REIT; AND (iv) NO PERSON MAY TRANSFER SERIES D PREFERRED STOCK IF
SUCH TRANSFER WOULD RESULT IN THE CAPITAL STOCK OF THE COMPANY BEING OWNED BY
FEWER THAN 100 PERSONS.  ANY PERSON WHO BENEFICIALLY OR CONSTRUCTIVELY OWNS OR
ATTEMPTS TO BENEFICIALLY OR CONSTRUCTIVELY OWN SERIES D PREFERRED STOCK WHICH
CAUSES OR WILL CAUSE A PERSON TO BENEFICIALLY OR CONSTRUCTIVELY OWN SERIES D
PREFERRED STOCK IN EXCESS OF THE ABOVE LIMITATIONS MUST IMMEDIATELY NOTIFY THE
COMPANY.  IF ANY OF THE RESTRICTIONS ON TRANSFER OR OWNERSHIP ARE VIOLATED, THE
SERIES D

                                       19
<PAGE>

PREFERRED STOCK REPRESENTED HEREBY WILL BE AUTOMATICALLY TRANSFERRED TO THE
TRUSTEE OF A TRUST FOR THE BENEFIT OF ONE OR MORE CHARITABLE BENEFICIARIES. IN
ADDITION, THE COMPANY MAY REDEEM SHARES UPON THE TERMS AND CONDITIONS SPECIFIED
BY THE BOARD OF DIRECTORS IN ITS SOLE DISCRETION IF THE BOARD OF DIRECTORS
DETERMINES THAT OWNERSHIP OR A TRANSFER OR OTHER EVENT MAY VIOLATE THE
RESTRICTIONS DESCRIBED ABOVE. FURTHERMORE, UPON THE OCCURRENCE OF CERTAIN
EVENTS, ATTEMPTED TRANSFERS IN VIOLATION OF THE RESTRICTIONS DESCRIBED ABOVE MAY
BE VOID AB INITIO. ALL TERMS IN THIS LEGEND WHICH ARE DEFINED IN THE ARTICLES
SUPPLEMENTARY FOR THE SERIES D PREFERRED STOCK SHALL HAVE THE MEANINGS ASCRIBED
TO THEM IN SUCH ARTICLES SUPPLEMENTARY, AS THE SAME MAY BE AMENDED FROM TIME TO
TIME, A COPY OF WHICH, INCLUDING THE RESTRICTIONS ON TRANSFER AND OWNERSHIP,
WILL BE FURNISHED TO EACH HOLDER OF SERIES D PREFERRED STOCK ON REQUEST AND
WITHOUT CHARGE. REQUESTS FOR SUCH A COPY MAY BE DIRECTED TO THE SECRETARY OF THE
COMPANY AT ITS PRINCIPAL OFFICE."

             (k)  Exchange of Series D Preferred Units. So long as the Company
                  ------------------------------------
     remains the general partner of the Operating Partnership, the Board of
     Directors of the Company is hereby expressly vested with authority (subject
     to the restrictions on ownership, transfer and redemption of Series D
     Preferred Stock set forth in this Section 7) to issue, and shall issue to
     the extent provided in the Partnership Agreement, Series D Preferred Stock
     in exchange for Series D Preferred Units (as defined in the Partnership
     Agreement) (the "Series D Preferred Units").
                      ------------------------

             (l)  Reservation of Shares.  Pursuant to the obligations of the
                  ---------------------
     Company under the Partnership Agreement to issue Series D Preferred Stock
     in exchange for Series D Preferred Units, the Board of Directors is hereby
     required to reserve and authorize for issuance a number of authorized but
     unissued shares of Series D Preferred Stock not less than the number of
     Series D Preferred Units issued to permit the Company to issue Series D
     Preferred Stock in exchange for Series D Preferred Units that may be
     exchanged for or converted into Series D Preferred Stock as provided in the
     Partnership Agreement.

             (m)  Severability.  If any provision of this Section 7 or any
                  ------------
     application of any such provision is determined to be invalid by any
     Federal or state court having jurisdiction over the issues, the validity of
     the remaining provisions shall not be affected and other applications of
     such provision shall be affected only to the extent necessary to comply
     with the determination of such court.

             (n)  NYSE.  Nothing in this Section 7 shall preclude the settlement
                  ----
     of any transaction entered into through the facilities of the NYSE. The
     shares of Series D Preferred Stock that are the subject of such transaction
     shall continue to be subject to the provisions of this Section 7 after such
     settlement.

             (o)  Applicability of Section 7.  The provisions set forth in this
                  --------------------------
     Section 7 shall apply to the Series D Preferred Stock notwithstanding any
     contrary provisions of the Series D Preferred Stock provided for elsewhere
     in these Articles Supplementary.

                                       20
<PAGE>

             Section 8.  No Conversion Rights.  The holders of the Series D
                         --------------------
Preferred Stock shall not have any rights to convert such shares into shares of
any other class or series of stock or into any other securities of, or interest
in, the Company.

             Section 9.  No Sinking Fund.  No sinking fund shall be established
                         ---------------
for the retirement or redemption of Series D Preferred Stock.

             Section 10. No Preemptive Rights.  No holder of the Series D
                         --------------------
Preferred Stock of the Company shall, as such holder, have any preemptive rights
to purchase or subscribe for additional shares of stock of the Company or any
other security of the Company which it may issue or sell.

             Fourth:  The Series D Preferred Stock have been classified and
             ------
designated by the Board under the authority contained in the Charter.

             Fifth:   These Articles Supplementary have been approved by the
             -----
Board in the manner and by the vote required by law.

             Sixth:   These Articles Supplementary shall be effective at the
             -----
time the State Department of Assessment and Taxation of Maryland accepts these
Articles Supplementary for the record.

             Seventh: The undersigned Senior Vice President of the Company
             -------
acknowledges these Articles Supplementary to be the corporate act of the Company
and, as to all matters or facts required to be verified under oath, the
undersigned Senior Vice President acknowledges that to the best of his
knowledge, information and belief, these matters and facts are true in all
material respects and that this statement is made under the penalties for
perjury.


                       (SPACE LEFT INTENTIONALLY BLANK)

                                       21
<PAGE>

          In witness whereof, the Company has caused these Articles
Supplementary to be executed under seal in its name and on its behalf by its
Senior Vice President and attested to by its Secretary on this 9 th day of
                                                              ---
December, 1999.

                                  KILROY REALTY CORPORATION


                                  By:  /S/ Tyler H. Rose
                                     -------------------------------
                                     Tyler H. Rose
                                     Senior Vice President


[SEAL]

ATTEST:

/S/ Richard E. Moran Jr.
- -------------------------
Richard E. Moran Jr.
Secretary

                                       22

<PAGE>

                                                                     EXHIBIT 4.7


                         REGISTRATION RIGHTS AGREEMENT

          THIS REGISTRATION RIGHTS AGREEMENT, dated as of December 9, 1999 (this
"Agreement"), is entered into by and among Kilroy Realty Corporation, a Maryland
 ---------
corporation (the "Company" or the "REIT"), Kilroy Realty, L.P., a Delaware
                  -------          ----
limited partnership (the "Operating Partnership"), and Montebello Realty Corp.,
                          ---------------------
a Delaware corporation (the "Unit Holder").
                             -----------

                                    RECITALS
                                    --------

          WHEREAS, in connection with the offering of 780,000 9 1/4%  Series D
Cumulative Redeemable Preferred Units of the Operating Partnership (the

"Units"), the Unit Holder (the "Contributor"), contributed to the Operating
 -----                          -----------
Partnership cash in return for the Units on terms and conditions set forth in
the Contribution Agreement, dated December 9, 1999 (the "Contribution
                                                         ------------
Agreement"), by and among the Company, the Operating Partnership and the
Contributor;

          WHEREAS, the Unit Holder will receive the Units in exchange for cash
contributed to Operating Partnership;

          WHEREAS, pursuant to the Partnership Agreement (as defined below), the
Units owned by the Unit Holder will be redeemable for cash or exchangeable for
shares of the Company's 9 1/4% Series D Cumulative Redeemable Preferred Stock
(the "Preferred Stock") upon the terms and subject to the conditions contained
      ---------------
therein; and

          WHEREAS, in order to induce the Contributor to enter into the
Contribution Agreement, the Company and the Operating Partnership have agreed to
provide the registration rights set forth herein to the Contributor and any
subsequent holder or holders of the Units.

          NOW, THEREFORE, in consideration of the premises and the mutual
agreements herein contained, and for good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties hereto
agree as follows:

                                   ARTICLE I

                                  DEFINITIONS
                                  -----------

          SECTION 1.1.  Definitions.  In addition to the definitions set forth
                        -----------
above, the following terms, as used herein, shall have the following meanings:

          "Affiliate" of any Person means any other Person directly or
           ---------
indirectly controlling or controlled by or under common control with such
Person.  For the purposes of this definition, "control" when used with respect
to any Person, means the possession, directly or indirectly, of the power to
direct or cause the direction of the management and policies of such Person,
whether through the ownership of voting securities, by contract or otherwise;
and the terms "controlling" and "controlled" have meanings correlative to the
foregoing.

                                       1
<PAGE>

          "Agreement" has the meaning given to such term in the recitals hereto.
           ---------

          "Contribution Agreement" means the Contribution Agreement, dated
           ----------------------
December 9, 1999, by and among the Company, the Operating Partnership and the
Contributor.

          "Articles of Incorporation" means the Articles of Amendment and
           -------------------------
Restatement of the Company, as the same may be amended, modified or restated
from time to time.

          "Articles Supplementary" means the Articles Supplementary of the
           ----------------------
Company, filed with the Maryland State Department of Assessments and Taxation on
December 9, 1999, designating the 9 1/4% Series D Cumulative Redeemable
Preferred Stock.

          "Business Day" means any day except a Saturday, Sunday or other day on
           ------------
which commercial banks in New York, New York or Los Angeles, California are
authorized by law to close.

          "Code" means the Internal Revenue Code of 1986, as amended from time
           ----
to time or any successor statute thereto, as interpreted by the applicable
regulations thereunder.

          "Commission" means the Securities and Exchange Commission.
           ----------

          "Company" means Kilroy Realty Corporation, a Maryland corporation.
           -------

          "Contributor" shall have the meaning given to such term in the
           -----------
recitals hereto.

          "Exchange Act" means the Securities Exchange Act of 1934, as amended,
           ------------
and the rules and regulations of the Commission promulgated thereunder.

          "Exchangeable Units" means Units which may be redeemable for cash
           ------------------
pursuant to Section 17.4 of the Partnership Agreement or exchangeable for
Preferred Stock or redeemable for cash pursuant to Section 17.7 of the
Partnership Agreement; (without regard to any limitations on the exercise of
such exchange right as a result of the Ownership Limit Provisions, as defined
below).

          "General Partner" means the Company or its successors as general
           ---------------
partner of the Operating Partnership.

          "Holder" means any Person who is the record or beneficial owner of any
           ------
Registrable Security or any assignee or transferee of such Registrable Security
(including assignments or transfers of Registrable Securities to such assignees
or transferees as a result of the foreclosure on any loans secured by such
Registrable Securities) unless such Registrable Security is acquired in a public
distribution pursuant to a registration statement under the Securities Act or
pursuant to transactions exempt from registration under the Securities Act, in
each such case where securities sold in such transaction may be resold without
subsequent registration under the Securities Act.

          "Incapacitated" shall have the meaning set forth in the Partnership
           -------------
Agreement.

                                       2
<PAGE>

          "Indemnified Party" shall have the meaning set forth in Section 2.8
           -----------------
hereof.

          "Indemnifying Party" shall have the meaning set forth in Section 2.8
           ------------------
hereof.

          "Inspectors" shall have the meaning set forth in Section 2.4(g).
           ----------

          "Operating Partnership" shall have the meaning given to such term in
           ---------------------
the recitals hereto.

          "Ownership Limit Provisions" mean the various provisions of the
           --------------------------
Articles Supplementary set forth in Section 7 of Article III thereof restricting
the ownership of Preferred Stock by certain Persons to specified percentages of
the outstanding Preferred Stock.

          "Partnership Agreement" means the Fourth Amended and Restated
           ---------------------
Agreement of Limited Partnership of the Operating Partnership dated as of
November 24, 1998, as supplemented by that First Supplement, dated January 6,
1999; Second Supplement dated February 22, 1999; Third Supplement dated March 9,
1999, Fourth Supplement dated March 31, 1999; and Fifth Supplement, dated March
26, 1999, and as amended by a First Amendment, dated as of the date hereof, and
as the same may be amended, modified or restated from time to time.

          "Person" means an individual or a corporation, partnership, limited
           ------
liability company, association, trust, or any other entity or organization,
including a government or political subdivision or an agency or instrumentality
thereof.

          "Piggy-Back Registration" shall have the meaning set forth in Section
           -----------------------
2.2 hereof.

          "Primary Registration" shall have the meaning set forth in Section 2.2
           --------------------
hereof.

          "Preferred Stock" shall have the meaning given to such term in the
           ---------------
recitals hereto.

          "REIT" means a real estate investment trust under Section 856 through
           ----
Section 860 of the Code.

          "Registrable Securities" means shares of Preferred Stock at any time
           ----------------------
owned, either of record or beneficially, by any Holder and no matter how
acquired (including, without limitation, shares of Preferred Stock issued or
issuable upon exchange of Exchangeable Units or issued or issuable by way of
stock dividend or stock split, or in connection with a merger, consolidation,
combination of shares, recapitalization or other reorganization and any other
securities issued pursuant to any other distribution with respect to the
Preferred Shares or in exchange for or replacement of such Preferred Shares)
until (i) a registration statement covering such securities has been declared
effective by the Commission and such shares have been sold or transferred
pursuant to such effective registration statement, (ii) such shares are sold
under circumstances in which all of the applicable conditions of Rule 144 under
the Securities Act (or any similar provisions then in force) under the
Securities Act are met or under which such shares may be sold pursuant to Rule
144(k) under the Securities Act or (iii) such shares have been otherwise
transferred in a transaction that would constitute a sale thereof under the
Securities

                                       3
<PAGE>

Act, the Company has delivered a new certificate or other evidence of ownership
for such shares not bearing the Securities Act restricted stock legend and such
shares may be resold without subsequent registration under the Securities Act.

          "Registration Expenses" shall have the meaning set forth in Section
           ---------------------
2.5 hereof.

          "Rule 144" means Rule 144 promulgated under the Securities Act, as
           --------
such rule may be amended from time to time, or any similar rule (other than Rule
144A) or regulation hereafter adopted by the Commission providing for offers and
sales of securities made in compliance therewith resulting in offers and sales
by subsequent holders that are not affiliates of the Company of such securities
being free of the registration and prospectus delivery requirements of the
Securities Act.

          "Rule 144A" means Rule 144A promulgated under the Securities Act, as
           ---------
such rule may be amended from time to time, or any similar rule (other than Rule
144) or regulation hereafter adopted by the Commission.

          "Rule 415" means Rule 415 promulgated under the Securities Act, as
           --------
such rule may be amended from time to time, or any similar rule or regulation
hereafter adopted by the Commission.

          "Secondary Registration" shall have the meaning set forth in Section
           ----------------------
2.2 hereof.

          "Securities Act" means the Securities Act of 1933, as amended, and the
           --------------
rules and regulations of the Commission promulgated thereunder.

          "Selling Holder" means a Holder who is selling Registrable Securities
           --------------
pursuant to a registration statement under the Securities Act pursuant to this
Agreement.

          "Shelf Registration" shall have the meaning set forth in Section 2.1
           ------------------
hereof.

          "Shelf Registration Statement" means any registration statement
           ----------------------------
relating to a Shelf Registration that covers any of the Preferred Stock of the
Company filed with the Commission under the Securities Act, including the
Prospectus, amendments and supplements to such registration statement, including
post-effective amendments, all exhibits and all material incorporated by
reference or deemed to be incorporated by reference in such registration
statement.

          "Underwriter" means a securities dealer who purchases any Registrable
           -----------
Securities as principal and not as part of such dealer's market-making
activities.

          "Unit Holder" shall have the meaning set forth in the recitals hereto.
           -----------

          "Units" shall have the meaning given to such term in the recitals
           -----
hereto.

                                       4
<PAGE>

                                   ARTICLE II
                              REGISTRATION RIGHTS
                              -------------------

          SECTION 2.1.  Shelf Registration.
                        ------------------

          The Company shall prepare and file a "shelf" registration statement
(the "Shelf Registration Statement") with respect to the Registrable Securities
      ----------------------------
covering the resale thereof by the Holders on an appropriate form for an
offering to be made on a continuous or delayed basis pursuant to Rule 415 (the
"Shelf Registration") within 60 days after the date the Exchangeable Units are
- -------------------
exchanged for shares of Preferred Stock and shall use its best efforts to cause
the Shelf Registration Statement to be declared effective within 120 days after
the date of such exchange.  The Company shall use its best efforts to keep such
Shelf Registration Statement continuously effective until the earliest of (A) 24
months following the effective date of the Shelf Registration Statement, (B)
such time as all of the Registrable Securities have been sold pursuant to the
Shelf Registration Statement or Rule 144 and (C) the date on which the
Registrable Securities may be sold without volume restrictions in accordance
with Rule 144.

          SECTION 2.2.  Piggy-Back Registration.
                        -----------------------

          (a) If the Company proposes to file a registration statement under the
Securities Act with respect to an offering by the Company of equity securities
for its own account (a "Primary Registration") or for the account of any of its
                        --------------------
respective securityholders (other than (i) any registration statement filed by
the Company under the Securities Act relating to an offering of capital stock
for its own account as a result of the exercise of the exchange rights set forth
in Section 8.6 of the Partnership Agreement, and covering the resale by the
Holders of the shares of capital stock received in such exchange, or (ii) a
registration statement on Form S-4 or S-8 (or any substitute form that may be
adopted by the Commission) or filed in connection with an exchange offer or
offering of securities solely to the Company's existing securityholders) (a
"Secondary Registration"), then the Company shall give written notice of such
- -----------------------
proposed filing to the Holders of Registrable Securities as soon as practicable
(but in no event less than ten (10) days before the anticipated filing date),
and such notice shall offer such Holders the opportunity to include in such
filing such number of shares of Registrable Securities as each such Holder may
request (a "Piggy-Back Registration").  The Company shall use its commercially
            -----------------------
reasonable efforts to cause the managing Underwriter or Underwriters of a
proposed underwritten offering to permit the Registrable Securities requested to
be included in a Piggy-Back Registration to be included on the same terms and
conditions as any similar securities of the Company included therein.

          (b) Withdrawal from Registration.  Any Holder requesting inclusion of
              ----------------------------
Registrable Securities pursuant to this Section 2.2 may, at any time prior to
the effective date of the registration statement relating to such registration,
revoke such request by delivering written notice of such revocation to the
Company; provided, however, that if the Company, in consultation with its
         --------  -------
financial and legal advisors, determines that such revocation would materially
delay the registration or otherwise require a recirculation of the prospectus
contained in the registration statement, then such Holder shall have no such
right to revoke its request.  If

                                       5
<PAGE>

the withdrawal of any Registrable Securities would allow, within the marketing
limitations set forth above, the inclusion in the underwriting of a greater
number of shares of Registrable Securities, then, to the extent practicable and
without delaying the underwriting, the Company shall offer to the Holders an
opportunity to include additional shares of Registrable Securities in the
proportions discussed in Section 2.3 below.

          (c) Termination or Withdrawal by the Company.  The Company shall have
              ----------------------------------------
the right to terminate or withdraw any registration initiated by it under this
Section 2.2 prior to the effectiveness of such registration whether or not any
Holder has elected to include securities in such registration.

      SECTION 2.3.  Reduction of Offering.  Notwithstanding anything
                    ---------------------
contained herein, if the managing Underwriter or Underwriters of an offering
described in Section 2.2 hereof are of the opinion that (i) the size of the
offering that the Holders, the Company and/or such other persons intend to make
or (ii) the kind of securities that the Holders, the Company and/or any other
persons or entities intend to include in such offering are such that the success
of the offering would be materially and adversely affected by inclusion of the
Registrable Securities requested to be included, then (A) if the size of the
offering is the basis of such Underwriter's opinion, the amount of securities to
be offered for the accounts of Holders shall be reduced pro rata (according to
the Registrable Securities proposed for registration) to the extent necessary to
reduce the total amount of securities to be included in such offering to the
amount recommended by such managing Underwriter or Underwriters; provided that
                                                                 --------
if securities are being offered for the account of other persons or entities as
well as the Company, then (1) in the case of a Primary Registration, the
reduction in the amount of securities requested to be offered shall be made
first pro rata among securities offered for the accounts of Holders and such
other persons or entities, and (2) in the case of a Secondary Registration, the
reduction in the amount of securities requested to be offered shall be made in
accordance with the terms of the registration rights agreement pursuant to which
such Secondary Registration is made, provided that if any such registration
                                     --------
rights agreement is silent with respect to reductions in shares being registered
thereunder, then with respect to the Registrable Securities intended to be
offered by Holders, the proportion by which the amount of such class of
securities intended to be offered by Holders is reduced shall not exceed the
proportion by which the amount of such class of securities intended to be
offered by such other persons or entities is reduced and (B) if the combination
of securities to be offered is the basis of such Underwriter's opinion, (x) the
Registrable Securities to be included in such offering shall be reduced as
described in clause (A) above (subject to the proviso in clause (A)) or, (y) if
the actions described in clause (x) would, in the judgment of the managing
Underwriter, be insufficient to substantially eliminate the adverse effect that
inclusion of the Registrable Securities requested to be included would have on
such offering, such Registrable Securities will be excluded from such offering.

          SECTION 2.4.  Registration Procedures; Filings; Information.  In
                        ---------------------------------------------
connection with any Shelf Registration Statement under Section 2.1 hereof, the
Company will use its best efforts to effect the registration and the sale of
such Registrable Securities in accordance with the intended method of
disposition thereof as quickly as practicable (and in any event within the
periods referred to in Section 2.1), and in connection with any such request:

                                       6
<PAGE>

          (a) As provided in Section 2.1 hereof, the Company will as
expeditiously as possible prepare and file with the Commission a registration
statement on any form for which the Company then qualifies or which counsel for
the Company shall deem appropriate and which form shall be available for the
sale by the Selling Holders of the Registrable Securities to be registered
thereunder in accordance with the intended method of distribution thereof and
which shall comply as to form in all material respects with the requirements of
the applicable form and include or incorporate by reference all financial
statements required by the Commission to be filed therewith, and use its best
efforts to cause such filed registration statement to become and remain
effective.

          (b) The Company will, prior to filing a registration statement or
prospectus or any amendment or supplement thereto, notify each Holder of
Registrable Securities that a Shelf Registration Statement is being filed and
advise such Holder that an offering of Registrable Securities will be made in
accordance with the method elected (which method may also include an
underwritten offering) by the Holders of a majority of the Registrable
Securities, furnish to each Selling Holder and each Underwriter, if any, of the
Registrable Securities covered by such registration statement or prospectus
copies of such registration statement or prospectus or any amendment or
supplement thereto as proposed to be filed, and thereafter furnish to such
Selling Holder and Underwriter, if any, such number of conformed copies of such
registration statement, each amendment and supplement thereto (in each case
including all exhibits thereto and documents incorporated by reference therein),
the prospectus included in such registration statement (including each
preliminary prospectus) and such other documents as such Selling Holder or
Underwriter may reasonably request in order to facilitate the disposition of the
Registrable Securities owned by such Selling Holder.

          (c) The Company will notify each Holder of Registrable Securities and
counsel for such Holder promptly and, if requested by such Holder or counsel,
confirm such advice in writing promptly (i) when a registration statement has
become effective and when any post-effective amendments and supplements thereto
become effective, (ii) of any request by the Commission or any state securities
authority for post-effective amendments and supplements to a registration
statement has become effective, (iii) of the issuance by the Commission or any
state securities authority of any stop order suspending the effectiveness of a
registration statement or the initiation of any proceedings for that purpose,
(iv) if, during the period a registration statement is effective, the
representations and warranties of the Company contained in any underwriting
agreement, securities sales agreement or other similar agreement, if any,
relating to such offering cease to be true and correct in all material respects,
(v) of the receipt by the Company of any notification with respect to the
suspension of the qualification of the Registrable Securities for sale in any
jurisdiction or the initiation or threatening of any proceeding for such
purpose, and (vi) of any determination by the Company that a post-effective
amendment to a registration statement would be appropriate.

          (d) The Company will use its best efforts to (i) register or qualify
the Registrable Securities under such other securities or blue sky laws of such
jurisdictions in the United States (where an exemption is not available) as any
Selling Holder or managing Underwriter or Underwriters, if any, reasonably (in
light of such Selling Holder's intended plan

                                       7
<PAGE>

of distribution) requests by the time the registration statement relating
thereto is declared effective by the Commission and (ii) cause such Registrable
Securities to be registered with or approved by such other governmental agencies
or authorities, including the National Association of Securities Dealers
("NASD"), as may be necessary by virtue of the business and operations of the
  ----
Company and do any and all other acts and things that may be reasonably
necessary or advisable to enable such Selling Holder to consummate the
disposition of the Registrable Securities owned by such Selling Holder; provided
                                                                        --------
that the Company will not be required to (A) qualify generally to do business in
any jurisdiction where it would not otherwise be required to qualify but for
this paragraph (d), (B) subject itself to taxation in any such jurisdiction or
(C) consent to general service of process in any such jurisdiction except as may
be required by the Securities Act.

          (e) The Company will immediately notify each Selling Holder or
Underwriter of such Registrable Securities, at any time when a prospectus
relating thereto is required to be delivered under the Securities Act, of the
occurrence of an event requiring the preparation of a supplement or amendment to
such prospectus and shall file with the Commission such amendments and
supplements to such prospectus and deliver copies of the same to the Selling
Holders or Underwriters, as the case may be, so that, as thereafter delivered to
the purchasers of such Registrable Securities, such prospectus will not contain
an untrue statement of a material fact or omit to state any material fact
required to be stated therein or necessary to make the statements therein, in
light of the circumstances then existing, not misleading and promptly make
available to each Selling Holder a reasonable number of copies of any such
supplement or amendment.

          (f) The Company will enter into customary agreements (including an
underwriting agreement or securities sale agreement, if any, in customary form)
containing such representations and warranties to the Holders of such
Registrable Securities and the Underwriters, if any, in form, substance and
scope as are customarily made by issuers to underwriters in similar underwritten
offerings as may be reasonably requested by them and take such other actions as
are reasonably required in order to expedite or facilitate the disposition of
such Registrable Securities.

          (g) The Company will make available for inspection by any Selling
Holder of such Registrable Securities, any Underwriter participating in any
disposition pursuant to such registration statement and any attorney, accountant
or other professional retained by any such Selling Holder or Underwriter
(collectively, the "Inspectors"), all financial and other records, pertinent
                    ----------
corporate documents and properties of the Company (collectively, the "Records")
                                                                      -------
as shall be reasonably necessary to enable them to exercise their due diligence
responsibility, and cause the Company's officers, directors and employees to
supply all information reasonably requested by any Inspectors in connection with
such registration statement.  Records which the Company determines, in good
faith, to be confidential and which it notifies the Inspectors are confidential
shall not be disclosed by the Inspectors unless (i) the disclosure of such
Records is necessary to avoid or correct a misstatement or omission in such
registration statement or (ii) the release of such Records is ordered pursuant
to a subpoena or other order from a court of competent jurisdiction.  Each
Selling Holder of such Registrable

                                       8
<PAGE>

Securities agrees that information obtained by it as a result of such
inspections shall be deemed confidential and shall not be used by it as the
basis for any market transactions in the securities of the company or its
Affiliates or otherwise disclosed by it unless and until such is made generally
available to the public. Each Selling Holder of such Registrable Securities
further agrees that it will, upon learning that disclosure of such Records is
sought in a court of competent jurisdiction, give notice to the Company and
allow the Company, at its expense, to undertake appropriate action to prevent
disclosure of the Records deemed confidential.

          (h) The Company will furnish to each Selling Holder and to each
Underwriter, if any, a signed counterpart, addressed to such Selling Holder or
Underwriter, of (i) an opinion or opinions of counsel to the Company and (ii) a
comfort letter or comfort letters from the Company's independent public
accountants (to the extent permitted by the standards of the American Institute
of Certified Public Accountants), each in customary form and covering such
matters of the type customarily covered by opinions or comfort letters, as the
case may be, as the Holders of a majority of the Registrable Securities included
in such offering or the managing Underwriter or Underwriters therefor reasonably
request.

          (i) The Company will otherwise use its best efforts to comply with all
applicable rules and regulations of the Commission, and make available to its
securityholders, as soon as reasonably practicable, an earnings statement
covering a period of twelve (12) months, beginning within three (3) months after
the effective date of the registration statement, which earnings statement shall
satisfy the provisions of Section 11(a) of the Securities Act and Rule 158 of
the Commission promulgated thereunder (or any successor rule or regulation
hereafter adopted by the Commission).

          (j) The Company will use its best efforts to cause all such
Registrable Securities to be listed on each securities exchange on which similar
securities issued by the Company are then listed.

          (k) The Company will use its best efforts to obtain CUSIP numbers for
the Preferred Stock not later than the effective date of the Shelf Registration
Statement.

          The Company may require, as a condition precedent to the obligations
of the Company under the Agreement, each Selling Holder of Registrable
Securities to promptly furnish in writing to the Company such information
regarding such Selling Holder, the Registrable Securities held by it and the
intended method of distribution of the Registrable Securities as the Company may
from time to time reasonably request and such other information as may be
legally required in connection with such registration.

          Each Selling Holder agrees that, upon receipt of any notice from the
Company of the happening of any event of the kind described in Section 2.4(e)
hereof, such Selling Holder will forthwith discontinue disposition of
Registrable Securities pursuant to the registration statement and prospectus
covering such Registrable Securities until such Selling Holder's receipt of the
copies of the supplemented or amended prospectus contemplated by Section 2.4(e)
hereof, and, if so directed by the Company, such Selling Holder will deliver to
the Company all copies, other than permanent file copies then in such Selling
Holder's possession, of the most recent

                                       9
<PAGE>

prospectus covering such Registrable Securities at the time of receipt of such
notice. Each Selling Holder of Registrable Securities agrees that it will
immediately notify the Company at any time when a prospectus relating to the
registration of such Registrable securities is required to be delivered under
the Securities Act of the happening of an event as a result of which information
previously furnished by such Selling Holder to the Company in writing for
inclusion in such prospectus contains an untrue statement of a material fact or
omits to state any material fact required to be stated therein or necessary to
make the statements therein, in light of the circumstances in which they were
made, not misleading. In the event the Company shall give such notice, the
Company shall extend the period during which such registration statement shall
be maintained effective (including the period referred to in Section 2.4(a)
hereof) by the number of days during the period from and including the date of
the giving of notice pursuant to Section 2.4(e) hereof to the date when the
Company shall make available to the Selling Holders of Registrable Securities
covered by such registration statement a prospectus supplemented or amended to
conform with the requirements of Section 2.4(e) hereof.

          SECTION 2.5.  Registration Expenses.  In connection with any
                        ---------------------
registration statement required to be filed hereunder, the Company shall pay the
following registration expenses incurred in connection with the registration
hereunder (the "Registration Expenses"): (i) all Commission, stock exchange,
                ---------------------
NASD or other registration and filing fees, (ii) fees and expenses of compliance
with securities or blue sky laws and compliance with the rules of the NASD
(including reasonable fees and disbursements of U.S. and local counsel for any
Underwriters and Holders in connection with blue sky qualifications of the
Registrable Securities), (iii) printing expenses of any persons in preparing and
distributing any Shelf Registration Statement, any prospectus, any amendments or
supplements thereto, any underwriting agreements, securities sales agreements,
certificates representing the Preferred Stock and any other document relating to
the performance of, and compliance with, this Agreement, (iv) internal expenses
(including, without limitation, all salaries and expenses of its officers and
employees performing legal or accounting duties), (v) the fees and expenses
incurred in connection with the listing of the Registrable Securities on any
securities exchange, (vi) reasonable fees and disbursements of counsel for the
Company and customary fees and expenses for independent certified public
accountants retained by the Company (including the expenses of any special
audits or comfort letters or costs associated with compliance with such special
audits or with the delivery by independent certified public accountants of a
comfort letter or comfort letters requested pursuant to Section 2.4(h) hereof),
(vii) the reasonable fees and expenses of any special experts retained by the
Company in connection with such registration, and (viii) reasonable fees and
expenses of one counsel (who shall be reasonably acceptable to the Company) for
the Selling Holders.  Except as expressly provided in the preceding sentence,
the Company shall have no obligation to pay any underwriting fees, discounts or
commissions attributable to the sale of Registrable Securities, or any out-of-
pocket expenses of the Holders (or the agents who manage their accounts) or any
transfer taxes relating to the registration or sale of the Registrable
Securities.

          SECTION 2.6.  Indemnification by the Company.  The Company agrees to
                        ------------------------------
indemnify and hold harmless each Selling Holder of Registrable Securities, its
officers, directors and agents, and each Person, if any, who controls such
Selling Holder within the

                                       10
<PAGE>

meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act
from and against any and all losses, claims, damages, expenses and liabilities
caused by any untrue statement or alleged untrue statement of a material fact
contained in any registration statement or prospectus relating to the
Registrable Securities (as amended or supplemented if the Company shall have
furnished any amendments or supplements thereto) or any preliminary prospectus,
or caused by any omission or alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein, in
light of the circumstances in which they were made, not misleading, except
insofar as such losses, claims, damages or liabilities are caused by any such
untrue statement or omission or alleged untrue statement or omission based upon
information furnished in writing to the Company by such Selling Holder or on
such Selling Holder's behalf expressly for inclusion therein. The Company also
agrees to indemnify any Underwriters of the Registrable Securities, their
officers and directors and each Person who controls such Underwriters within the
meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act on
substantially the same basis as that of the indemnification of the Selling
Holders provided in this Section 2.6, provided that the foregoing indemnity with
                                      --------
respect to any preliminary prospectus shall not inure to the benefit of any
Underwriter of the Registrable Securities from whom the person asserting any
such losses, claims, damages or liabilities purchased the Registrable Securities
which are the subject thereof if (i) such person did not receive a copy of the
prospectus (or the prospectus as supplemented) at or prior to the confirmation
of the sale of such Registrable Securities to such person in any case where such
delivery is required by the Securities Act and the untrue statement or omission
of a material fact contained in such preliminary prospectus was corrected in the
prospectus (or the prospectus as supplemented), provided that such Underwriter
received prior notice that such prospectus (or the prospectus as supplemented)
corrected such untrue statement or omission of a material fact; or (ii) such
person received a prospectus at or prior to the confirmation of the sale of such
Registrable Securities to such person during the period when the use of such
prospectus has been suspended in accordance with Section 2.4, provided that such
                                                              --------
Underwriter received prior notice of such suspension.

          SECTION 2.7.  Indemnification by Holders of Registrable Securities.
                        ----------------------------------------------------
Each Selling Holder agrees, severally but not jointly, to indemnify and hold
harmless the Company, its officers, directors and agents and each Person, if
any, who controls the Company within the meaning of either Section 15 of the
Securities Act or Section 20 of the Exchange Act to the same extent as the
foregoing indemnity from the Company to such Selling Holder, but only with
respect to information relating to such Selling Holder furnished in writing by
such Selling Holder or on such Selling Holder's behalf expressly for use in any
registration statement or prospectus relating to the Registrable Securities, or
any amendment or supplement thereto, or any preliminary prospectus.  In case any
action or proceeding shall be brought against the Company or its officers,
directors or agents or any such controlling person, in respect of which
indemnity may be sought against such Selling Holder, such Selling Holder shall
have the rights and duties given to the Company, and the Company or its
officers, directors or agents or such controlling person shall have the rights
and duties given to such Selling Holder, by Section 2.6 hereof.

                                       11
<PAGE>

          SECTION 2.8.  Conduct of Indemnification Proceedings.  In case any
                        --------------------------------------
proceeding (including any governmental investigation) shall be instituted
involving any person in respect of which indemnity may be sought pursuant to
Sections 2.6 or 2.7 hereof, such person (an "Indemnified Party") shall promptly
                                             -----------------
notify the person against whom such indemnity may be sought (an "Indemnifying
                                                                 ------------
Party") in writing and the Indemnifying Party shall assume the defense thereof,
- -----
including the employment of counsel reasonably satisfactory to such Indemnified
Party, and shall assume the payment of all fees and expenses.  In any such
proceeding, any Indemnified Party shall have the right to retain its own
counsel, but the fees and expenses of such counsel shall be at the expense of
such Indemnified Party unless (i) the Indemnifying Party and the Indemnified
Party shall have mutually agreed to the retention of such counsel or (ii) the
named parties to any such proceeding (including any impleaded parties) include
both the Indemnified Party and the Indemnifying Party and representation of both
parties by the same counsel would be inappropriate due to actual or potential
differing interests between them.  It is understood that the Indemnifying Party
shall not, in connection with any proceeding or related proceedings in the same
jurisdiction, be liable for the reasonable fees and expenses of more than one
separate firm of attorneys (in addition to any local counsel) at any time for
all such Indemnified Parties, and that all such fees and expenses shall be
reimbursed as they are incurred.  In the case of any such separate firm for the
Indemnified Parties, such firm shall be designated in writing by (i) in the case
of Persons indemnified pursuant to Section 2.6 hereof, by the Selling Holders
which owned a majority of the Registrable Securities sold under the applicable
registration statement and (ii) in the case of Persons indemnified pursuant to
Section 2.7 hereof, the Company.  The Indemnifying Party shall not be liable for
any settlement of any proceeding effected without its written consent, but if
settled with such consent, or if there be a final judgment for the plaintiff,
the Indemnifying Party shall indemnify and hold harmless such Indemnified
Parties from and against any loss or liability (to the extent stated above) by
reason of such settlement or judgment.  Notwithstanding the foregoing sentence,
if at any time an Indemnified Party shall have requested an Indemnifying Party
to reimburse the Indemnified Party for fees and expenses of counsel as
contemplated by the third sentence of this paragraph, the Indemnifying Party
agrees that it shall be liable for any settlement of any proceeding effected
without its written consent if (i) such settlement is entered into more than
thirty (30) Business Days after receipt by such Indemnifying Party of the
aforesaid request and (ii) such Indemnifying Party shall not have reimbursed the
Indemnified Party in accordance with such request prior to the date of such
settlement.  No Indemnifying Party shall, without the prior written consent of
the Indemnified Party, effect any settlement of any pending or threatened
proceeding in which any Indemnified Party is or could have been a party and
indemnity could have been sought hereunder by such Indemnified Party, unless
such settlement includes an unconditional release of such Indemnified Party from
all liability arising out of such proceeding.

          SECTION 2.9.  Contribution.  If the indemnification provided for in
                        ------------
Sections 2.6 or 2.7 hereof is unavailable to an Indemnified Party or
insufficient in respect of any losses, claims, damages or liabilities referred
to therein, then each such Indemnifying Party, in lieu of indemnifying such
Indemnified Party, shall contribute to the amount paid or payable by such
Indemnified Party as a result of such losses, claims, damages or liabilities (i)
as between the Company and the Selling Holders on the one hand and the
Underwriters on the other, in such proportion as is appropriate to reflect the
relative benefits received by the Company and the

                                       12
<PAGE>

Selling Holders on the one hand and the Underwriters on the other from the
offering of the securities, or if such allocation is not permitted by applicable
law, in such proportion as is appropriate to reflect not only the relative
benefits but also the relative fault of the Company and the Selling Holders on
the one hand and of the Underwriters on the other in connection with the
statements or omissions which resulted in such losses, claims, damages or
liabilities, as well as any other relevant equitable considerations and (ii) as
between the Company on the one hand and each Selling Holder on the other, in
such proportion as is appropriate to reflect the relative fault of the Company
and of each Selling Holder in connection with such statements or omissions which
resulted in such losses, claims, damages or liabilities, as well as any other
relevant equitable considerations. The relative benefits received by the Company
and the Selling Holders on the one hand and the Underwriters on the other shall
be deemed to be in the same proportion as the total proceeds from the offering
(net of underwriting discounts and commissions but before deducting expenses)
received by the Company and the Selling Holders bear to the total underwriting
discounts and commissions received by the Underwriters, in each case as set
forth in the table on the cover page of the prospectus. The relative fault of
the Company and the Selling Holders on the one hand and of the Underwriters on
the other shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission or alleged
omission to state a material fact relates to information supplied by the Company
and the Selling Holders or by the Underwriters. The relative fault of the
Company on the one hand and of each Selling Holder on the other shall be
determined by reference to, among other things, whether the untrue or alleged
untrue statement of a material fact or the omission or alleged omission to state
a material fact relates to information supplied by the Company or such Selling
Holder, and the Company's and the Selling Holder's relative intent, knowledge,
access to information and opportunity to correct or prevent such statement or
omission.

          The Company and the Selling Holders agree that it would not be just
and equitable if contribution pursuant to this Section 2.9 were determined by
pro rata allocation (even if the Underwriters were treated as one entity for
such purpose) or by any other method of allocation which does not take account
of the equitable considerations referred to in the immediately preceding
paragraph.  The amount paid or payable by an Indemnified Party as a result of
the losses, claims, damages or liabilities referred to in Sections 2.6 and 2.7
hereof shall be deemed to include, subject to the limitations set forth above,
any legal or other expenses reasonably incurred by such Indemnified Party in
connection with investigating or defending any such action or claim.
Notwithstanding the provisions of this Section 2.9, no Underwriter shall be
required to contribute any amount in excess of the amount by which the total
price at which the securities underwritten by it and distributed to the public
were offered to the public exceeds the amount of any damages which such
Underwriter has otherwise been required to pay by reason of such untrue or
alleged untrue statement or omission or alleged omission, and no Selling Holder
shall be required to contribute any amount in excess of the amount by which the
total price at which the securities of such Selling Holder were offered to the
public exceeds the amount of any damages which such Selling Holder has otherwise
been required to pay by reason of such untrue or alleged untrue statement or
omission or alleged omission.  No person guilty of fraudulent misrepresentation
(within the meaning of Section 11(f) of the Securities Act) shall be entitled to
contribution from any person who was not guilty of such fraudulent
misrepresentation. The

                                       13
<PAGE>

Selling Holder's obligations to contribute pursuant to this Section 2.9 are
several in the proportion that the proceeds of the offering received by such
Selling Holder bears to the total proceeds of the offering received by all the
Selling Holders and not joint.

          SECTION 2.10.  Participation in Underwritten Registrations.  No Person
                         -------------------------------------------
may participate in any underwritten registration hereunder unless such Person
(a) agrees to sell such Person's securities on the basis provided in any
underwriting arrangements approved by the Persons entitled hereunder to approve
such arrangements and (b) completes and executes all questionnaires, powers of
attorney, indemnities, underwriting agreements and other documents in customary
form and reasonably required under the terms of such underwriting arrangements
and these registration rights provided for in this Article II.

          SECTION 2.11.  Rule 144.  The Company covenants that it will file any
                         --------
reports required to be filed by it under the Securities Act and the Exchange Act
and that it will take such further action as any Holder may reasonably request,
all to the extent required from time to time to enable Holders to sell
Registrable Securities without registration under the Securities Act within the
limitation of the exemptions provided by (a) Rule 144 under the Securities Act,
as such Rule may be amended from time to time, or (b) any similar rule or
regulation hereafter adopted by the Commission.  Upon the request of any Holder,
the Company will deliver to such Holder a written statement as to whether it has
complied with such requirements.

          SECTION 2.12.  Holdback Agreements.
                         -------------------

          (a) Restrictions on Public Sale by Holder of Registrable Securities.
              ---------------------------------------------------------------
To the extent not inconsistent with applicable law, each Holder whose securities
are included in a registration statement pursuant to Section 2.2 agrees, upon
receipt of prior written notice from the Company received not later than 17 days
prior to the effective date of such registration statement, not to effect any
sale or distribution of the issue being registered or a similar security of the
Company, or any securities convertible into or exchangeable or exercisable for
such securities, including a "broker's transaction" pursuant to Rule 144, but
excluding any private sale during the 14 days prior to, and during the 90-day
period beginning on, the effective date of such registration statement (except
as part of such registration), if and to the extent requested in writing by the
Company in the case of a non-underwritten public offering or if and to the
extent requested in writing by the managing Underwriter or Underwriters in the
case of an underwritten public offering.

          (b) If the Company determines in its good faith judgment that the
filing of the Shelf Registration Statement under Section 2.1 hereof or the use
of any related prospectus would require the disclosure of non-public material
information that the Company has a bona fide business purpose for preserving as
confidential or the disclosure of which would impede the Company's ability to
consummate a material transaction, and that the Company is not otherwise
required by applicable securities laws or regulations to disclose, upon written
notice of such determination by the Company, the rights of the Holders to offer,
sell or distribute any Registrable Securities pursuant to the Shelf Registration
Statement or to require the Company to

                                       14
<PAGE>

take action with respect to the registration or sale of any Registrable
Securities pursuant to the Shelf Registration Statement shall be suspended until
the earlier of (i) the date upon which the Company notifies the Holders in
writing that suspension of such rights for the grounds set forth in this Section
2.12(b) is no longer necessary and (ii) 180 days. The Company agrees to give
such notice as promptly as practicable following the date that such suspension
of rights is no longer necessary.

          (c) If all reports required to be filed by the Company pursuant to the
Exchange Act have not been filed by the required date without regard to any
extension, or if the consummation of any business combination by the Company has
occurred or is probable for purposes of Rule 3-05 or Article 11 of Regulation S-
X under the Act, upon written notice thereof by the Company to the Holders, the
rights of the Holders to offer, sell or distribute any Registrable Securities
pursuant to the Shelf Registration Statement or to require the Company to take
action with respect to the registration or sale of any Registrable Securities
pursuant to the Shelf Registration Statement shall be suspended until the date
on which the Company has filed such reports or obtained and filed the financial
information required by Rule 3-05 or Article 11 of Regulation S-X to be included
or incorporated by reference, as applicable, in the Shelf Registration
Statement, and the Company shall notify the Holders as promptly as practicable
when such suspension is no longer required.

                                  ARTICLE III

                                 MISCELLANEOUS
                                 -------------

          SECTION 3.1.  Remedies.  In addition to being entitled to exercise all
                        --------
rights provided herein and granted by law, including recovery of damages, the
Holders shall be entitled to specific performance of the rights under this
Agreement.  The Company agrees that monetary damages would not be adequate
compensation for any loss incurred by reason of a breach by it of the provisions
of this Agreement and hereby agrees to waive the defense in any action for
specific performance that a remedy at law would be adequate.

          SECTION 3.2.  Amendments and Waivers.  The provisions of this
                        ----------------------
Agreement, including the provisions of this sentence, may not be amended,
modified or supplemented, and waivers or consents to departures from the
provisions hereof may not be given without the prior written consent of the
Company and the Holders or any such Holder's representative if any such Holder
is Incapacitated.  No failure or delay by any party to insist upon the strict
performance of any covenant, duty, agreement or condition of this Agreement or
to exercise any right or remedy consequent upon any breach thereof shall
constitute a waiver of any such breach or any other covenant, duty, agreement or
condition.

          SECTION 3.3.  Notices.  All notices and other communications in
                        -------
connection with this Agreement shall be made in writing by hand delivery,
registered first-class mail, telex, telecopier, or air courier guaranteeing
overnight delivery:

                                       15
<PAGE>

               (1)  if to Unit Holder:

                    Montebello Realty Corp.
                    800 Scudder's Mill Road
                    Special Investments, Area 2-G
                    Plainsboro, NJ 08536
                    Attention: J. Timothy Ford
                    Facsimile Number:  (609) 282-5401

                    with a copy to:

                    Peter Blessing, Esq. (5543-10972)
                    Shearman & Sterling
                    599 Lexington Avenue
                    New York, NY  10022
                    Facsimile Number:  (212) 848-7179

               (2)  if to the Company or the Operating Partnership:

                    2250 East Imperial Highway
                    El Segundo, California 90245
                    Attention: President and Chief Executive Officer
                    Facsimile Number:  (310) 322-5981

                    or to such other address as the Company may hereafter
                    specify in writing.

          All such notices and communications shall be deemed to have been duly
given: at the time delivered by hand, if personally delivered; when received if
deposited in the mail, postage prepaid, if mailed; when answered back, if
telexed; when receipt acknowledged, if telecopied; and on the next business day,
if timely delivered to an air courier guaranteeing overnight delivery.

          SECTION 3.4.  Successors and Assigns.  Except as expressly provided in
                        ----------------------
this Agreement, the rights and obligations of the Holders under this Agreement
shall not be assignable by any Holder to any Person that is not a Holder.  This
Agreement shall be binding upon the parties hereto and their respective
successors and assigns.

          SECTION 3.5.  Counterparts; Facsimile Signatures.  This Agreement may
                        ----------------------------------
be executed in any number of counterparts and by the parties hereto in separate
counterparts, each of which when so executed shall be deemed to be an original
and all of which taken together shall constitute one and the same agreement.
Each party shall become bound by this Agreement immediately upon affixing its
signature hereto, which may be an original signature or facsimile thereof.

                                       16
<PAGE>

          SECTION 3.6.  Governing Law.  This Agreement shall be governed by and
                        -------------
construed in accordance with the internal laws of the State of California
without regard to the choice of law provisions thereof.

          SECTION 3.7.  Severability.  In the event that any one or more of the
                        ------------
provisions contained herein, or the application thereof in any circumstance, is
held invalid, illegal or unenforceable, the validity, legality and
enforceability of any such provision in every other respect and of the remaining
provisions contained herein shall not be affected or impaired thereby.

          SECTION 3.8.  Entire Agreement.  This Agreement is intended by the
                        ----------------
parties as a final expression of their agreement and intended to be a complete
and exclusive statement of the agreement and understanding of the parties hereto
in respect of the subject matter contained herein.  There are no restrictions,
promises, warranties or undertakings, other than those set forth or referred to
herein with respect to the registration rights granted by the Company with
respect to the Registrable Securities.  This Agreement supersedes all prior
agreements and understandings between the parties with respect to such subject
matter.

          SECTION 3.9.  Headings.  The headings in this Agreement are for
                        --------
convenience of reference only and shall not limit or otherwise affect the
meaning hereof.

          SECTION 3.10.  No Third Party Beneficiaries.  Nothing express or
                         ----------------------------
implied herein is intended or shall be construed to confer upon any person or
entity, other than the parties hereto and their respective successors and
assigns, any rights, remedies or other benefits under or by reason of this
Agreement.

                            (Signature Page Follows)

                                       17
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the date first written above.

                              KILROY REALTY CORPORATION,
                              a Maryland corporation


                              By:  /s/ Tyler H. Rose
                                 -------------------------------------------
                                  Tyler H. Rose
                                  Senior Vice President and Treasurer



                              KILROY REALTY, L.P.,
                              a Delaware limited partnership

                              By: KILROY REALTY CORPORATION,
                                  its general partner


                              By: /s/ Tyler H. Rose
                                 -------------------------------------------
                                  Tyler H. Rose
                                  Senior Vice President and Treasurer


                              MONTEBELLO REALTY CORP., a Delaware corporation


                              By:    /s/ J. Timothy Ford
                                 -------------------------------------------
                                  Name:  J. Timothy Ford
                                  Title: Vice President


                                      S-1

<PAGE>

                                                                   EXHIBIT 10.78

                              FIRST AMENDMENT TO
                          FOURTH AMENDED AND RESTATED
                       AGREEMENT OF LIMITED PARTNERSHIP
                            OF KILROY REALTY, L.P.
                            ----------------------


     This First Amendment to Fourth Amended and Restated Agreement of Limited
Partnership of Kilroy Realty, L.P. (this "Amendment") is entered into as of
                                          ---------
December 9, 1999, by and between Kilroy Realty Corporation ("General Partner"),
                                                             ---------------
a Maryland corporation, as the general partner of Kilroy Realty, L.P., a
Delaware limited partnership (the "Partnership") and Montebello Realty Corp., a
                                   -----------
Delaware corporation ("Series D Preferred Partner").
                       --------------------------

                                   RECITALS
                                   --------

     Whereas, the signatories hereto desire to amend that certain Fourth Amended
and Restated Agreement of Limited Partnership of Kilroy Realty, L.P., dated as
of November 24, 1998, as supplemented by that First Supplement dated January 6,
1999; Second Supplement dated February 22, 1999; Third Supplement dated March 9,
1999; Fourth Supplement dated March 31, 1999; and Fifth Supplement dated March
26, 1999, (collectively, as supplemented, the "Agreement") as set forth herein;
                                               ---------
any terms capitalized herein but not defined herein having the definitions
therefor set forth in the Agreement.

     Now, therefore, in consideration of the foregoing, of the mutual promises
set forth herein, and of other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto, intending to
be legally bound, agree to continue the Partnership and amend the Agreement as
follows:

     1.  Units.  As of the date hereof Series D Preferred Partner has
         -----
contributed _____[$25-$30 million]_______to the Partnership in exchange for the
                 -----------------
issuance to Series D Preferred Partner of _____________ Series D Preferred Units
(as defined in the Agreement, as amended hereby).  The Series D Preferred Units
issued to the Series D Preferred Partner have been duly issued and fully paid.
The Series D Preferred Partner is hereby admitted to the Partnership, effective
as of December 9, 1999, as an Additional Limited Partner (the information set
forth on Exhibit A attached hereto relating to the interest of the Series D
Preferred Partner in the Partnership is hereby included in Exhibit A to the
Agreement), and by execution of this Amendment the Series D Preferred Partner
has agreed to be bound by all of the terms and conditions of the Agreement, as
amended hereby.

     2.  Amendments to Definitions.
         -------------------------

         (a) Junior Units.  With respect to the definition of "Junior Units" set
             ------------                                      ------------
     forth in Section 1.1, the text "and" is deleted after "Series A Preferred
     Units" and replaced with a
<PAGE>

     comma; and the text "and Series D Preferred Units" is hereby inserted
     immediately after the text "Series C Preferred Units".

         (b) Parity Preferred Units.  With respect to the definition of "Parity
             ----------------------                                      ------
     Preferred Units" set forth in Section 1.1, the text "and" is deleted after
     ---------------
     "Series A Preferred Units" and replaced with a comma; and the text "and
     Series D Preferred Units" is hereby inserted immediately after the text
     "Series C Preferred Units".

         (c) Preferred Unit.  With respect to the definition of "Preferred
             --------------                                      ---------
     Unit" set forth in Section 1.1, the text "and" is deleted after "Series A
     ----
     Preferred Units" and replaced with a comma; and the text "and Series D
     Preferred Units" is hereby inserted immediately after the text "Series C
     Preferred Units".

         (d) Net Income/Net Loss.  With respect to the definition of ""Net
             -------------------                                       ---
     Income" or "Net Loss"" set forth in Section 1.1, the text "and" is
     ------      --------
     deleted after "Series A Preferred Units" and replaced with a comma; and the
     text "and Series D Preferred Units" is hereby inserted immediately after
     the text "and Series C Preferred Units".

         (e) Partnership Interest.  With respect to the definition of
             --------------------
     "Partnership Interest" set forth in Section 1.1, the text "and" is
      --------------------
     deleted after "Series A Preferred Units" and replaced with a comma; and the
     text "and Series D Preferred Units" is hereby inserted immediately after
     the text "Series C Preferred Units".

         (f) Senior Preferred Unit.  With respect to the definition of "Senior
             ---------------------                                      ------
     Preferred Unit" set forth in Section 1.1, the text "and" is deleted after
     --------------
     "Series A Preferred Units" and replaced with a comma; and the text "and
     Series D Preferred Units" is hereby inserted immediately after the text
     "Series C Preferred Units" in each instance.

         (g) Additional Terms.  Section 1.1 of the Agreement is hereby amended
             ----------------
     to include the following definitions:

             "REIT Series D Preferred Share" means a share of 9 1/4% Series D
              -----------------------------
          Cumulative Redeemable Preferred Stock, par value $.01 per share,
          liquidation $50 per share, of the General Partner.

             "Series D Articles Supplementary" shall have the meaning set
              -------------------------------
          forth in Section 19.3.C(i).

             "Series D Contributor" means Montebello Realty Corp., a Delaware
              --------------------
          corporation, as a party to that certain Contribution Agreement, dated
          December 9, 1999, and any Affiliate to which the Series D Preferred
          Units may be assigned in accordance with this Agreement."
<PAGE>

             "Series D Exchange Notice" shall have the meaning set forth in
              ------------------------
          Section 19.9.B(i).

             "Series D Exchange Price" shall have the meaning set forth in
              -----------------------
          Section 19.9.A(i).

             "Series D Excess Units" shall have the meaning set forth in Section
              ---------------------
          19.9.A(iii).

             "Series D Limited Partner" means any Person holding Series D
              ------------------------
          Preferred Units and named as a Series D Limited Partner in Exhibit A
          attached hereto, as such Exhibit may be amended from time to time, or
          any Substitute Limited Partner, in such Person's capacity as a Series
          D Limited Partner in the Partnership.

             "Series D Preferred Capital" means a Capital Account balance
              --------------------------
          equal to the product of (i) the number of Series D Preferred Units
          then held by the Series D Limited Partners and/or the General Partner
          multiplied by (ii) the sum of $50 and any Preferred Distribution
          Shortfall per Series D Preferred Unit.

             "Series D Preferred Units" shall have the meaning set forth in
              ------------------------
          Section 19.2.

             "Series D Preferred Unit Distribution Payment Date" shall have
              -------------------------------------------------
          the meaning set forth in Section 19.3.A.

             "Series D Preferred Unit Partnership Record Date" shall have the
              -----------------------------------------------
          meaning set forth in Section 19.3.A.

             "Series D Redemption Notice" shall have the meaning set forth in
              --------------------------
          Section 19.9.B(i).

             "Series D Redemption Price" shall have the meaning set forth in
              -------------------------
          Section 19.6.A.

             "Series D Priority Return" shall have the meaning set forth in
           ------------------------
          Section 19.1.

     3.   Amendments.
          ----------

          (a) Section 3.2.  Section 3.2 of the Agreement is hereby amended by
              -----------
     the insertion of the text "and to the Series D Limited Partners in
     accordance with Section 19.3 after the text "to the Series C Limited
     Partners in accordance with Section 17.2".
<PAGE>

          (b) Section 5.1.  Section 5.1 of the Agreement is hereby amended by
              -----------
     the insertion of the text "or Series D Preferred Units in accordance with
     Section 19.3 after the text "Series C Preferred Units in accordance with
     Section 17.2,".

          (c) Section 5.2.  Section 5.2  of the Agreement is hereby amended by
              -----------
     the insertion of the text "or to the Series D Limited Partners" after the
     text "Series C Limited Partners".

          (d)  Section 6.2.
               -----------

               (i)   Section 6.2.B.1(e) of the Agreement is hereby amended by
          deleting the word "and" immediately prior to the text "(ii)" and by
          the insertion of the following text at the end of such subsection,
          "and (iii) in respect of the Series D Preferred Units, an amount equal
          to the cumulative Series D Priority Return to the last day of the
          current Partnership Year or to the date of redemption, to the extent
          Series D Preferred Units are redeemed during such year, over the
          cumulative Net Income allocated to the Holders of such units pursuant
          to this Section 6.2.B.1(e) for all prior Partnership Years".
                  -----------------

               (ii)  Section 6.2.B.2(a) of the Agreement is hereby amended by
          the insertion of the text "and Series D Preferred Capital" immediately
          after the text "and Series C Preferred Capital" and the deletion of
          the text "and" immediately following the text "Series A Preferred
          Capital"and inserting in its place a comma.

               (iii) Section 6.2.C of the Agreement is hereby amended by the
          insertion of the text "and the Series D Preferred Units" immediately
          after the text "and the Series C Preferred Units" and the deletion of
          the text "and" immediately following the text "Series A Preferred
          Units"and inserting in its place a comma.

          (e) Section 7.3.F(iii). Section 7.3.F(iii) of the Agreement is hereby
              ------------------
     amended by deleting the text "or" immediately prior to the text "Article
     17" and by the insertion of the text "or Article 19" immediately following
     the text "Article 17".

          (f) Section 7.3.F(v). Section 7.3.F(v) of the Agreement is hereby
              ----------------
     amended by deleting the text "and" immediately after the text "17.4" and
     inserting in its place a comma and by the insertion of the text ", 19.6 and
     19.9" immediately following the text "17.7".

          (g) Section 7.9.D.  Section 7.9.D of the Agreement is hereby amended
              -------------
     by the insertion of the text "and to the Series D Limited Partners in
     accordance with Section 19.3 after the text "and the Series C Limited
     Partners in accordance with Sections 16.2 and 17.2".
                                 ----------------------
<PAGE>

          (h) Section 8.4.  Section 8.4 of the Agreement is hereby amended by
              -----------
     deleting the text "Redemption" immediately following the text "Section 8.6
     and the" and by the insertion in its place of the text "redemption"; and
     further deleting the text "and" immediately after the text "17.4" and
     inserting in its place a comma and by the insertion of the text ", 19.6 and
     19.9" immediately following the text "17.7".

          (i) Section 11.1.A.  Section 11.1.A of the Agreement is hereby amended
              --------------
     by the insertion of the text "or REIT Series D Preferred Shares pursuant to
     Section 19.9 after the text "or Series C Preferred Shares pursuant to
     Section 17.7".

          (j) Section 11.2.B.  Section 11.2.B of the Agreement is hereby amended
              --------------
     by deleting the text "and" immediately prior to the text "17.5" and
     replacing it with a comma; and by the insertion of the text "and "Section
     19.7" immediately following the text "17.5".

          (k) Section 11.2.C.  Section 11.2.C of the Agreement is hereby amended
              --------------
     by deleting the text "and" immediately prior to the text "17.5" and
     replacing it with a comma; and by the insertion of the text "and "Section
     19.7" immediately following the text "17.5".

          (l) Section 11.3.A.  Section 11.3.A of the Agreement is hereby amended
              --------------
     by deleting the text "16.7 and 17.7" and by the insertion in its place of
     the text "16.7, 17.7 and 19.9".

          (m)  Section 11.3.D.
               --------------

               (i)   Section 11.3.D of the Agreement is hereby amended by the
          insertion of the text "19.6 and 19.9" after the text "and 17.7".

               (ii)  Section 11.3.D of the Agreement is hereby further amended
          by the insertion of the text "or Series D Preferred Units" after the
          text "or Series C Preferred Units".

          (n) Section 11.3.E.  Section 11.3.E of the Agreement is hereby amended
              --------------
     by the insertion of the text "or the specified amount of REIT Series D
     Preferred Shares" after the text "or the specified amount of REIT Series C
     Preferred Shares".

          (o) Section 11.5.   Section 11.5 of the Agreement is hereby amended by
              ------------
     the insertion of the text "and the right to exchange for REIT Series D
     Preferred Shares pursuant to Section 19.9 after the text "the right to
     exchange for REIT Series C Shares pursuant to Section 17.7".
<PAGE>

          (p) Section 11.6.A.  Section 11.6.A is hereby amended by the insertion
              --------------
     of the text "or its right of redemption or exchange of all of such Limited
     Partner's Series D Preferred Units under Section 19.9" after the text "or
     its right of redemption or exchange of all of such Limited Partner's Series
     C Preferred Units under Section 17.7."

          (q) Section 11.6.B.  Section 11.6.B is hereby amended by the insertion
              --------------
     of the text "or exchange of all of such Limited Partner's Series D
     Preferred Units under Section 19.9" after the text "or exchange of all of
     such Limited Partner's Series C Preferred Units under Section 17.7".

          (r) Section 11.6.D.  Section 11.6.D of the Agreement is hereby amended
              --------------
     by deleting the text "or" immediately following the text "17.4"; and by the
     insertion of the text ",19.6 or 19.9" immediately following the text
     "17.7".

          (s) Section 11.6.E.  Section 11.6.E of the Agreement is hereby amended
              --------------
     by the insertion of the text ", REIT Series C Preferred Shares or REIT
     Series D Preferred Shares" immediately following the text "REIT Series A
     Preferred Shares"; and by the insertion of the text ", Series C Preferred
     Units or Series D Preferred Units" immediately following the text "Series A
     Preferred Units"; and in 11.6.E(iv), the deletion of the text "Redemption"
     immediately prior to the text "or exchange for" and the insertion of the
     text "redemption' in its place and the deletion of  the text "and"
     immediately following the text "17.4"; and by the insertion of the text
     ",19.6 or 19.9" immediately following the text "17.7"; and in 11.6.E(v) the
     deletion of  the text "and" immediately following the text "17.4"; and by
     the insertion of the text ",19.6 or 19.9" immediately following the text
     "17.7".

          (t) Section 11.6.F.  Section 11.6.F is hereby amended by the insertion
              --------------
     of the text "or Series D Preferred Units" after the text "or Series C
     Preferred Units".

          (u) Section 13.1.G.  Section 13.1.G is hereby amended by the insertion
              --------------
     of the text "or REIT Series D Preferred Shares" after the text "or REIT
     Series C Preferred Shares".

          (v) Section 14.1.B.  Section 14.1.B is hereby amended by the insertion
              --------------
     of the text "and the Series D Limited Partners" after the text "and the
     Series C Limited Partners".

     4.   Article 19.  The following new Article 19 is inserted in the Agreement
          ----------
after Article 18 thereof:

                                 "ARTICLE 19.
                           SERIES D PREFERRED UNITS
<PAGE>

          Section 19.1.  Definition.  The term "Series D Priority Return" shall
                         ----------             ------------------------
     mean, an amount equal to 9 1/4% per annum, determined on the basis of a 360
     day year of twelve 30 day months (and for any period shorter than a full
     quarterly period for which distributions are computed, the amount of the
     distribution payable will be computed based on the ratio of the actual
     number of days elapsed in such period to ninety (90) days), cumulative to
     the extent not distributed for any given distribution period pursuant to
     Sections 5.1 and 19.3 of the Partnership Agreement, of the stated value of
     $50 per Series D Preferred Unit, commencing on the date of issuance of such
     Series D Preferred Unit. Capitalized terms used herein and not otherwise
     defined herein shall have the meanings ascribed to them in the Partnership
     Agreement.

          Section 19.2.  Designation and Number.  A series of Partnership Units
                         ----------------------
     in the Partnership designated as the "9 1/4% Series D Cumulative Redeemable
     Preferred Units" (the "Series D Preferred Units") is hereby established.
                            ------------------------
     The number of Series D Preferred Units shall be __________.

          Section 19.3.  Distributions.
                         -------------

               A.    Payment of Distributions.  Subject to the rights of Holders
                     ------------------------
          of Parity Preferred Units as to the payment of distributions, pursuant
          to Section 5.1 hereof, Holders of Series D Preferred Units shall be
          entitled to receive, when, as and if declared by the Partnership
          acting through the General Partner, out of Available Cash, cumulative
          preferential cash distributions at the rate per annum of 9 1/4% of the
          original Capital Contribution per Series D Preferred Unit.  All
          distributions shall be cumulative, shall accrue from the original date
          of issuance and will be payable (i) quarterly (such quarterly periods
          for purposes of payment and accrual will be the quarterly periods
          ending on the dates specified in this sentence and not calendar year
          quarters) in arrears, on February 15, May 15, August 15 and November
          15, of each year commencing on the first such payment dates to occur
          following their original date of issuance, and, (ii), in the event of
          (A) an exchange of Series D Preferred Units into REIT Series D
          Preferred Shares, or (B) a redemption of Series D Preferred Units, on
          the exchange date or redemption date, as applicable (each a "Series D
                                                                       --------
          Preferred Unit Distribution Payment Date").  The amount of the
          ----------------------------------------
          distribution payable for any period will be computed on the basis of a
          360-day year of twelve 30-day months and for any period shorter than a
          full quarterly period for which distributions are computed, the amount
          of the distribution payable will be computed based on the ratio of the
          actual number of days elapsed in such period to ninety (90) days.  If
          any date on which distributions are to be made on the Series D
          Preferred Units is not a Business Day (as defined herein), then
          payment of the distribution to be made on such date will be made on
          the next succeeding day that is a Business Day (and without any
          interest or other payment in respect of any such delay) except that,
          if such Business Day is in the next succeeding calendar year, such
          payment shall be
<PAGE>

          made on the immediately preceding Business Day, in each case with the
          same force and effect as if made on such date. Distributions on the
          Series D Preferred Units will be made to the Holders of record of the
          Series D Preferred Units on the relevant record dates to be fixed by
          the Partnership acting through the General Partner, which record dates
          shall in no event exceed fifteen (15) Business Days prior to the
          relevant Series D Preferred Unit Distribution Payment Date (the
          "Series D Preferred Unit Partnership Record Date").
           -----------------------------------------------

               B.  Distributions Cumulative.  Distributions on the Series D
                   ------------------------
          Preferred Units will accrue whether or not the terms and provisions of
          any agreement of the Partnership, including any agreement relating to
          its indebtedness at any time prohibit the declaration, setting aside
          for payment or current payment of distributions, whether or not the
          Partnership has earnings, whether or not there are funds legally
          available for the payment of such distributions and whether or not
          such distributions are authorized.  Accrued but unpaid distributions
          on the Series D Preferred Units will accumulate as of the Series D
          Preferred Unit Distribution Payment Date on which they first become
          payable.  Distributions on account of arrears for any past
          distribution periods may be declared and paid at any time, without
          reference to a regular Series D Preferred Unit Distribution Payment
          Date to Holders of record of the Series D Preferred Units on the
          record date fixed by the Partnership acting through the General
          Partner which date shall not exceed fifteen (15) Business Days prior
          to the payment date.  Accumulated and unpaid distributions will not
          bear interest.

               C.  Priority as to Distributions.
                   ----------------------------

                    (i) So long as any Series D Preferred Units are outstanding,
               no distribution of cash or other property shall be authorized,
               declared, paid or set apart for payment on or with respect to any
               Junior Unit, nor shall any cash or other property (other than
               capital stock of the General Partner which corresponds in ranking
               to the Partnership Interests being acquired) be set aside for or
               applied to the purchase, redemption or other acquisition for
               consideration of any Series D Preferred Units, any Parity
               Preferred Units (including the Series A Preferred Units or Series
               C Preferred Units) with respect to distributions or any Junior
               Units, unless, in each case, all distributions accumulated on all
               Series D Preferred Units and all classes and series of
               outstanding Parity Preferred Units as to the payment of
               distributions have been paid in full.  The foregoing sentence
               will not prohibit (a) distributions payable solely in Junior
               Units, (b) the exchange of Junior Units or Parity Preferred Units
               (including the Series A Preferred Units or Series C Preferred
               Units) into Junior Units, or (c) the redemption of Partnership
               Interests corresponding to any REIT Series D Preferred Shares (as
               hereinafter defined), Parity Preferred Shares (as defined in the
<PAGE>

               Series D Articles Supplementary to the Charter (as defined below)
               establishing the REIT Series D Preferred Shares (the "Series D
                                                                     --------
               Articles Supplementary") with respect to distributions or Junior
               ----------------------
               Stock (as defined in the Series D Articles Supplementary) to be
               purchased by the General Partner pursuant to the Charter to
               preserve the General Partner's status as a real estate investment
               trust, provided that such redemption shall be upon the same terms
               as the corresponding stock purchase pursuant to the Charter.

                    (ii)   So long as distributions have not been paid in full
               (or a sum sufficient for such full payment is not irrevocably
               deposited in trust for immediate payment) upon the Series D
               Preferred Units, all distributions authorized and declared on the
               Series D Preferred Units and all classes or series of outstanding
               Parity Preferred Units (including the Series A Preferred Units or
               Series C Preferred Units) with respect to payment of
               distributions shall be authorized and declared so that the amount
               of distributions authorized and declared per Series D Preferred
               Unit and such other classes or series of Parity Preferred Units
               (including the Series A Preferred Units or Series C Preferred
               Units) shall in all cases bear to each other the same ratio that
               accrued distributions per Series D Preferred Unit and such other
               classes or series of Parity Preferred Units (which shall not
               include any accumulation in respect of unpaid distributions for
               prior distribution periods if such class or series of Parity
               Preferred Units do not have cumulative distribution rights) bear
               to each other.

                    (iii)  Notwithstanding anything to the contrary set forth
               herein, distributions on Partnership Interests held by either (a)
               the General Partner or (b) any other Holder of Partnership
               Interest in the Partnership, in each case ranking junior to or on
               parity with the Series D Preferred Units may be made, without
               preserving the priority of distributions described in Sections
               19.3.C(i) and (ii), but only to the extent such distributions are
               required to preserve the real estate investment trust status of
               the General Partner and in the case of any Holder other than the
               General Partner only to the extent required by the Partnership
               Agreement.

               D.  No Further Rights.  Holders of Series D Preferred Units shall
                   -----------------
          not be entitled to any distributions, whether payable in cash, other
          property or otherwise, in excess of the full cumulative distributions
          described herein.

          Section 19.4.  Intentionally Omitted.
                         ---------------------
<PAGE>

          Section 19. 5.  Liquidation Proceeds.
                          --------------------

               A.   Upon any voluntary or involuntary liquidation, dissolution
          or winding-up of the affairs of the Partnership, distributions on the
          Series D Preferred Units shall be made in accordance with Article 13
          of the Partnership Agreement.

               B.  Notice.  Written notice of any such voluntary or involuntary
                   ------
          liquidation, dissolution or winding-up of the Partnership, stating the
          payment date or dates when, and the place or places where, the amounts
          distributable in such circumstances shall be payable, shall be given
          by (i) fax and (ii) by first class mail, postage pre-paid, not less
          than thirty (30) and not more than sixty (60) days prior to the
          payment date stated therein, to each record Holder of the Series D
          Preferred Units at the respective addresses of such Holders as the
          same shall appear on the transfer records of the Partnership.

               C.  No Further Rights.  After payment of the full amount of the
                   -----------------
          liquidating distributions to which they are entitled, the Holders of
          Series D Preferred Units will have no right or claim to any of the
          remaining assets of the Partnership.

               D.  Consolidation, Merger or Certain Other Transactions.  The
                   ---------------------------------------------------
          consolidation or merger or other business combination of the
          Partnership with or into, any corporation, trust, or other entity (or
          of any corporation, trust, or other entity with or into the
          Partnership) shall not be deemed to constitute a liquidation,
          dissolution or winding-up of the Partnership.

          Section 19.6.  Optional Redemption.
                         --------------------

               A.    Right of Optional Redemption. The Series D Preferred Units
                     ----------------------------
          may not be redeemed prior to the fifth (5th) anniversary of the
          issuance date.  On or after such date, the Partnership shall have the
          right to redeem the Series D Preferred Units, in whole or in part, at
          any time or from time to time, upon not less than thirty (30) nor more
          than sixty (60) days written notice, at a redemption price, payable in
          cash, equal to the Capital Account balance of the Holders of Series D
          Preferred Units (the "Series D Redemption Price"); provided, however,
                                -------------------------    --------  -------
          that no redemption pursuant to this Section 19.6 will be permitted if
          the Series D Redemption Price does not equal or exceed the original
          Capital Contribution of such Holder plus the cumulative Series D
          Priority Return, to the redemption date to the extent not previously
          distributed.  If fewer than all of the outstanding Series D Preferred
          Units are to be redeemed, the Series D Preferred Units to be redeemed
<PAGE>

          shall be selected pro rata (as nearly as practicable without creating
          fractional units).

               B.  Limitation on Redemption.
                   ------------------------

                    (i)   The Series D Redemption Price of the Series D
               Preferred Units (other than the portion thereof consisting of
               accumulated but unpaid distributions) will be payable solely out
               of the sale proceeds of capital stock of the General Partner,
               which will be contributed by the General Partner to the
               Partnership as an additional capital contribution, or out of the
               sale of limited partner interests in the Partnership and from no
               other source. For purposes of the preceding sentence, "capital
               stock" means any equity securities (including Common Stock and
               Preferred Stock (as such terms are defined in the Charter)),
               shares, participation or other ownership interests (however
               designated) and any rights (other than debt securities
               convertible into or exchangeable for equity securities) or
               options to purchase any of the foregoing.

                    (ii)  The Partnership may not redeem fewer than all of the
               outstanding Series D Preferred Units unless all accumulated and
               unpaid distributions have been paid on all Series D Preferred
               Units for all quarterly distribution periods terminating on or
               prior to the date of redemption.

               C.  Procedures for Redemption.
                   -------------------------

                    (i)   Notice of redemption will be (A) faxed, and (B) mailed
               by the Partnership, by certified mail, postage prepaid, not less
               than thirty (30) nor more than sixty (60) days prior to the
               redemption date, addressed to the respective Holders of record of
               the Series D Preferred Units at their respective addresses as
               they appear on the records of the Partnership.  No failure to
               give or defect in such notice shall affect the validity of the
               proceedings for the redemption of any Series D Preferred Units
               except as to the Holder to whom such notice was defective or not
               given.  In addition to any information required by law, each such
               notice shall state:  (1) the redemption date, (2) the Series D
               Redemption Price, (3) the aggregate number of Series D Preferred
               Units to be redeemed and if fewer than all of the outstanding
               Series D Preferred Units are to be redeemed, the number of Series
               D Preferred Units to be redeemed held by such Holder, which
               number shall equal such Holder's pro rata share (based on the
               percentage of the aggregate number of outstanding Series D
               Preferred Units the total number of Series D Preferred Units held
               by such Holder represents) of the aggregate number of Series D
               Preferred Units to be redeemed,  (4) the
<PAGE>

               place or places where the Series D Preferred Units are to be
               surrendered for payment of the Series D Redemption Price, (5)
               that distributions on the Series D Preferred Units to be redeemed
               will cease to accumulate on such redemption date and (6) that
               payment of the Series D Redemption Price will be made upon
               presentation and surrender of such Series D Preferred Units.

                    (ii)  If the Partnership gives a notice of redemption in
               respect of Series D Preferred Units (which notice will be
               irrevocable) then, by 12:00 noon, New York City time, on the
               redemption date, the Partnership will deposit irrevocably in
               trust for the benefit of the Series D Preferred Units being
               redeemed funds sufficient to pay the applicable Series D
               Redemption Price and will give irrevocable instructions and
               authority to pay such Series D Redemption Price to the Holders of
               the Series D Preferred Units upon surrender of the Series D
               Preferred Units by such Holders at the place designated in the
               notice of redemption.  If the Series D Preferred Units are
               evidenced by a certificate and if fewer than all Series D
               Preferred Units evidenced by any certificate are being redeemed,
               a new certificate shall be issued upon surrender of the
               certificate evidencing all Series D Preferred Units, evidencing
               the unredeemed Series D Preferred Units without cost to the
               Holder thereof.  On and after the date of redemption,
               distributions will cease to accumulate on the Series D Preferred
               Units or portions thereof called for redemption, unless the
               Partnership defaults in the payment thereof.  If any date fixed
               for redemption of Series D Preferred Units is not a Business Day,
               then payment of the Series D Redemption Price payable on such
               date will be made on the next succeeding day that is a Business
               Day (and without any interest or other payment in respect of any
               such delay) except that, if such Business Day falls in the next
               calendar year, such payment will be made on the immediately
               preceding Business Day, in each case with the same force and
               effect as if made on such date fixed for redemption.  If payment
               of the Series D Redemption Price is improperly withheld or
               refused and not paid by the Partnership, distributions on such
               Series D Preferred Units will continue to accumulate from the
               original redemption date to the date of payment, in which case
               the actual payment date will be considered the date fixed for
               redemption for purposes of calculating the applicable Series D
               Redemption Price.

          Section 19.7.  Voting Rights.
                         -------------

               A.  General.  Holders of  the Series D Preferred Units will not
                   -------
          have any voting rights or right to consent to any matter requiring the
          consent or
<PAGE>

          approval of the Limited Partners, except as set forth in below and in
          Section 7.3.F.

               B.  Certain Voting Rights.  So long as any Series D Preferred
                   ---------------------
          Units remain outstanding, the Partnership shall not, without the
          affirmative vote of the Holders of at least two-thirds of the Series D
          Preferred Units outstanding at the time (i) (A) authorize or create,
          or increase the authorized or issued amount of, any class or series of
          Partnership Interests ranking prior to the Series D Preferred Units
          with respect to payment of distributions or rights upon liquidation,
          dissolution or winding-up, or (B) reclassify any Partnership Interests
          of the Partnership into any such senior Partnership Interest, or (c)
          create, authorize or issue any obligations or security convertible
          into or evidencing the right to purchase any such senior Partnership
          Interests, (ii) (A) authorize or create, or increase the authorized or
          issued amount of any Parity Preferred Units, or (B) reclassify any
          Partnership Interest into any such Partnership Interest or (c) create,
          authorize or issue any obligations or security convertible into or
          evidencing the right to purchase any such Partnership Interests but
          only to the extent such Parity Preferred Units are issued to an
          Affiliate of the Partnership, other than the General Partner to the
          extent the issuance of such interests was to allow the General Partner
          to issue corresponding preferred stock to Persons who are not
          Affiliates of the Partnership, or (iii) either (A) consolidate, merge
          into or with, or convey, transfer or lease its assets substantially as
          an entirety to, any corporation or other entity or (B) amend, alter or
          repeal the provisions of the Partnership Agreement (including, without
          limitation, this Article 19), whether by merger, consolidation or
          otherwise, in each case in a manner that would materially and
          adversely affect the powers, special rights, preferences, privileges
          or voting power of the Series D Preferred Units or the Holders
          thereof; provided, however, that with respect to the occurrence of any
          event set forth in (iii) above, so long as (1) the Partnership is the
          surviving entity and the Series D Preferred Units remain outstanding
          with the terms thereof unchanged, or (2) the resulting, surviving or
          transferee entity is a partnership, limited liability company or other
          pass-through entity organized under the laws of any state and
          substitutes the Series D Preferred Units for other interests in such
          entity having substantially the same terms and rights as the Series D
          Preferred Units, including with respect to distributions, voting
          rights and rights upon liquidation, dissolution or winding-up, then
          the occurrence of any such event shall not be deemed to materially and
          adversely affect such rights, privileges or voting powers of the
          Holders of the Series D Preferred Units; and provided further that any
          increase in the amount of Partnership Interests or the creation or
          issuance of any other class or series of Partnership Interests, in
          each case ranking (y) junior to the Series D Preferred Units with
          respect to payment of distributions and the distribution of assets
          upon liquidation, dissolution or winding-up, or (z) on a parity to the
          Series D Preferred Units with respect to payment of distributions and
          the distribution of assets upon liquidation, dissolution or winding up
          to the extent such Partnership Interests are not issued to an
          Affiliate of the Partnership, other
<PAGE>

          than the General Partner to the extent the issuance of such interests
          was to allow the General Partner to issue corresponding preferred
          stock to persons who are not Affiliates of the Partnership, shall not
          be deemed to materially and adversely affect such rights, preferences,
          privileges or voting powers.

          Section 19.8.  Transfer Restrictions.  The Series D Preferred Units
                         ---------------------
     shall be subject to the provisions of Article 11 hereof; provided, however,
                                                              --------  -------
     that the Series D Preferred Units shall not be subject to the right of
     first refusal of the General Partner as described in Section 11.3 hereof
     and any Affiliate of the Series D Contributor to whom the Series D
     Preferred Units are assigned (in whole or in part) in accordance with this
     Partnership Agreement (other than the right of first refusal) shall be
     admitted to the Partnership as a Substitute Limited Partner.  No transfer
     of Series D Preferred Units is permitted, without the consent of the
     General Partner which consent may be given or withheld in its sole and
     absolute discretion, if such transfer would result in more than four
     partners holding all outstanding Series D Preferred Units within the
     meaning of Treasury Regulation Section 1.7704-1(h)(3)(i); provided,
                                                               --------
     however, that the General Partner's consent may not be unreasonably
     -------
     withheld if (a) such transfer would not result in more than ten partners
     holding all outstanding Series D Preferred Units within the meaning of
     Treasury Regulation Section 1.7704-1(h)(3)(i) and (b) the General Partner
     is relying on a provision other than Treasury Regulation Section 1.7704-
     1(h) to avoid classification of Operating Partnership as a PTP.  In
     addition, no transfer may be made to any person if such transfer would
     cause the exchange of the Series D Preferred Units for REIT Series D
     Preferred Shares, as provided herein, to be required to be registered under
     the Securities Act of 1933, as amended, or any state securities laws.

          Section 19.9.  Exchange Rights.
                         ---------------

          (a)  Right to Exchange.
               -----------------

                    (i)   Series D Preferred Units will be exchangeable in whole
               but not in part unless expressly otherwise provided herein at
               anytime on or after the tenth (10th) anniversary of the date of
               issuance, at the option of 51% of the Holders of all outstanding
               Series D Preferred Units, for authorized but previously unissued
               REIT Series D Preferred Shares at an exchange rate of one REIT
               Series D Preferred Shares from the General Partner for one Series
               D Preferred Unit, subject to adjustment as described below (the

               "Series D Exchange Price"), provided that the Series D Preferred
               ------------------------    --------
               Units will become exchangeable at any time, in whole but not in
               part unless expressly otherwise provided herein, at the option of
               51% of the Holders of all outstanding Series D Preferred Units
               for REIT Series D Preferred Shares if (x) at any time full
               distributions shall not have been timely made on any Series D
               Preferred Unit with respect to six (6) prior quarterly
               distribution periods, whether or not consecutive, provided,
                                                                 --------
<PAGE>

               however, that a distribution in respect of Series D Preferred
               -------
               Units shall be considered timely made if made within two (2)
               Business Days after the applicable Series D Preferred Unit
               Distribution Payment Date if at the time of such late payment
               there shall not be any prior quarterly distribution periods in
               respect of which full distributions were not timely made or (y)
               upon receipt by a Holder or Holders of Series D Preferred Units
               of (1) notice from the General Partner that the General Partner
               or a Subsidiary of the General Partner has taken the position
               that the Partnership is, or upon the occurrence of a defined
               event in the immediate future will be, a PTP and (2) an opinion
               rendered by an outside nationally recognized independent counsel
               familiar with such matters addressed to a Holder or Holders of
               Series D Preferred Units, that the Partnership is or likely is,
               or upon the occurrence of a defined event in the immediate future
               will be or likely will be, a PTP.  In addition, the Series D
               Preferred Units may be exchanged for REIT Series D Preferred
               Shares, in whole but not in part unless expressly otherwise
               provided herein, at the option of 51% of the Holders of all
               outstanding Series D Preferred Units prior to the tenth (10th)
               anniversary of the issuance date and after the third (3rd)
               anniversary of the issuance date thereof if such Holder of a
               Series D Preferred Unit shall deliver to the General Partner
               either (i) a private letter ruling addressed to such Holder of
               Series D Preferred Units or (ii) an opinion of independent
               counsel reasonably acceptable to the General Partner based on the
               enactment of temporary or final Treasury Regulations or the
               publication of a Revenue Ruling, in either case to the effect
               that an exchange of the Series D Preferred Units at such earlier
               time would not cause the Series D Preferred Units to be
               considered "stock and securities" within the meaning of Section
               351(e) of the Code for purposes of determining whether the Holder
               of such Series D Preferred Units is an "investment company" under
               section 721(b) of the Code if an exchange is permitted at such
               earlier date.  Furthermore, if the Series D Contributor holding
               51% of all outstanding Series D Preferred Units so determines,
               all outstanding Series D Preferred Units held by all Holders
               (regardless of whether held by the Series D Contributor) shall be
               exchanged in whole but not in part for REIT Series D Preferred
               Shares (but only if the exchange in whole may be accomplished
               consistently with the ownership limitations set forth under the
               Series D Articles Supplementary (as defined herein), taking into
               account exceptions thereto) if either (A) any Holder thereof is a
               real estate investment trust within the meaning of Sections 856
               through 859 of the Code and (i) the Partnership reasonably
               determines that the assets and income of the Partnership for a
               taxable year after 1999 would not satisfy the income and assets
               tests of Section 856 of the Code for such taxable year if the
               Partnership were a real estate investment trust within the
               meaning of the Code or (ii) any such Holder of Series D Preferred
<PAGE>

               Units shall deliver to the Partnership and the General Partner an
               opinion of independent counsel reasonably acceptable to the
               General Partner to the effect that, based on the assets and
               income of the Partnership for a taxable year after 1999, the
               Partnership would not satisfy the income and assets tests of
               Section 856 of the Code for such taxable year if the Partnership
               were a real estate investment trust within the meaning of the
               Code and that such failure would create a meaningful risk that a
               Holder of the Series D Preferred Units would fail to maintain
               qualification as a real estate investment trust, or (B) any
               Holder of the Series D Preferred Units is an entity other than a
               real estate investment trust within the meaning of Sections 856
               through 859 of the Code, and both (I) such Holder concludes based
               on results or projected results that there exists (in the
               reasonable judgment of the Holder) an imminent and substantial
               risk that the Holder's interest in the Partnership does or will
               represent more than 19.5% of the total profits or capital
               interests in the Partnership (determined in accordance with
               Treasury Regulations Section 1.731-2(e)(4)) for a taxable year,
               and (II) the Holder delivers to the General Partner an opinion of
               nationally recognized independent counsel to the effect that
               there is an imminent and substantial risk that the Holder's
               interest in the Partnership does or will represent more than
               19.5% of the total profits or capital interests in the
               Partnership (determined in accordance with Treasury Regulations
               Section 1.731-2(e)(4)) for a taxable year.

                    (ii)   Notwithstanding anything to the contrary set forth in
               Section 19.9.A(i) hereof, if a Series D Exchange Notice (as
               defined herein) has been delivered to the General Partner, then
               the General Partner may, at its option, within ten (10) Business
               Days after receipt of the Series D Exchange Notice, elect to
               cause the Partnership to redeem all or a portion of the
               outstanding Series D Preferred Units for cash in an amount equal
               to the original Capital Contribution per Series D Preferred Unit
               plus all accrued and unpaid distributions thereon to the date of
               redemption.  If the General Partner elects to redeem fewer than
               all of the outstanding Series D Preferred Units, the number of
               Series D Preferred Units held by each Holder to be redeemed shall
               equal such Holder's pro rata share (based on the percentage of
               the aggregate number of outstanding Series D Preferred Units that
               the total number of Series D Preferred Units held by such Holder
               represents) of the number of Series D Preferred Units being
               redeemed.

                    (iii)  In the event an exchange of all or a portion of
               Series D Preferred Units pursuant to Section 19.9.A(i) hereof
               would violate the provisions on ownership limitation of the
               General Partner set forth in Section 7 of Article Third of the
               Series D Articles Supplementary to the
<PAGE>

               Charter with respect to the REIT Series D Preferred Shares, each
               Holder of the Series D Preferred Units shall be entitled to
               exchange, pursuant to the provisions of Section 19.9.B a number
               of Series D Preferred Units which would comply with the
               provisions on the ownership limitation of the General Partner set
               forth in such Section 7 of Article Third of the Series D Articles
               Supplementary, with respect to such Holder, and any Series D
               Preferred Units not so exchanged (the "Series D Excess Units")
                                                      ---------------------
               shall be redeemed by the Partnership for cash in an amount equal
               to the original Capital Contribution per Excess Unit, plus any
               accrued and unpaid distributions thereon, whether or not
               declared, to the date of redemption subject to any restriction
               therein contained in any debt instrument or agreement of the
               Partnership. In the event an exchange would result in Series D
               Excess Units, as a condition to such exchange, each Holder of
               such units agrees to provide representations and covenants
               reasonably requested by the General Partner relating to (1) the
               widely held nature of the interests in such Holder, sufficient to
               assure the General Partner that the Holder's ownership of stock
               of the General Partner (without regard to the limits described
               above) will not cause any individual to own in excess of 6.2% of
               the stock of the General Partner, and (2) to the extent such
               Holder can so represent and covenant without obtaining
               information from its owners (other than one or more direct or
               indirect parent corporations, limited liability companies or
               partnerships and not the holders of any interests in any such
               parent), the Holder's ownership of tenants of the Partnership and
               its Affiliates. For purposes of determining the number of Series
               D Excess Units under this Section 19.9(A)(iii), the "Beneficial
               Ownership Limit" and "Constructive Ownership Limit" set forth in
               the Series D Articles Supplementary shall be deemed to be 0.8
               percentage points less than the limits set forth in the Series D
               Articles Supplementary. To the extent the General Partner would
               not be able to pay the cash set forth above in exchange for the
               Series D Excess Units, and to the extent consistent with the
               Charter, the General Partner agrees that it will grant to the
               Holders of the Series D Preferred Units exceptions to the
               Beneficial Ownership Limit and Constructive Ownership Limit set
               forth in the Series D Articles Supplementary sufficient to allow
               such Holders to exchange all of their Series D Preferred Units
               for REIT Series D Preferred Shares, provided such Holders furnish
               to the General Partner representations acceptable to the General
               Partner in its sole and absolute discretion which assure the
               General Partner that such exceptions will not jeopardize the
               General Partner's tax status as a REIT for purposes of federal
               and applicable state law. Notwithstanding any provision of this
               Partnership Agreement to the contrary, no Series D Limited
               Partner shall be entitled to effect an exchange of Series D
               Preferred Units for REIT Series D Preferred Shares to the extent
               that ownership or right to acquire such
<PAGE>

               shares would cause the Partner or any other Person or, in the
               opinion of counsel selected by the General Partner, may cause the
               Partner or any other Person, to violate the restrictions on
               ownership and transfer of REIT Series D Preferred Shares set
               forth in the Charter. To the extent any such attempted exchange
               for REIT Series D Preferred Shares would be in violation of the
               previous sentence, it shall be void ab initio and such Series D
               Limited Partner shall not acquire any rights or economic interest
               in the REIT Series D Preferred Shares otherwise issuable upon
               such exchange.

                    (iv) The redemption of Series D Preferred Units described in
               Section 19.9.A(ii) and (iii) shall be subject to the provisions
               of Section 19.6.B(i) and Section 19.6.C(ii); provided, however,
                                                            --------  -------
               that the term "Series D Redemption Price" in such Section shall
               be read to mean the original Capital Contribution per Series D
               Preferred Unit being redeemed plus all accrued and unpaid
               distributions to the redemption date.

               (b)  Procedure for Exchange.
                    ----------------------

                    (i)  Any exchange shall be exercised pursuant to a notice of
               exchange (the "Series D Exchange Notice") delivered to the
                              ------------------------
               General Partner by the Partners representing at least 51% of the
               outstanding Series D Preferred Units (or by the Series D
               Contributor in the case of an exchange pursuant to the last
               sentence of Section 19.9.A(i) hereof), by (A) fax and (B) by
               certified mail postage prepaid.  The General Partner may effect
               any exchange of Series D Preferred Units, or exercise its option
               to cause the Partnership to redeem any portion of the Series D
               Preferred Units for cash pursuant to Section 19.9.A(ii) or redeem
               Series D Excess Units pursuant to Section 19.9.A(iii), by
               delivering to each Holder of record of Series D Preferred Units,
               within ten (10) Business Days following receipt of the Series D
               Exchange Notice, (a) if the General Partner elects to cause the
               Partnership to acquire any of the Series D Preferred Units then
               outstanding, (1) certificates representing the REIT Series D
               Preferred Shares being issued in exchange for the Series D
               Preferred Units of such Holder being exchanged and (2) a written
               notice (a "Series D Redemption Notice") stating (A) the
                          --------------------------
               redemption date, which may be the date of such Series D
               Redemption Notice or any other date which is not later than sixty
               (60) days following the receipt of the Series D Exchange Notice,
               (B) the redemption price, (C) the place or places where the
               Series D Preferred Units are to be surrendered and (D) that
               distributions on the Series D Preferred Units will cease to
               accrue on such redemption date, or (b) if the General Partner
               elects to cause the Partnership to redeem all of the Series D
               Preferred Units then outstanding in exchange for cash, a Series D
               Redemption Notice.  Series D Preferred
<PAGE>

               Units shall be deemed canceled (and any corresponding Partnership
               Interest represented thereby deemed terminated) on the redemption
               date. Holders of Series D Preferred Units shall deliver any
               canceled certificates representing Series D Preferred Units which
               have been exchanged or redeemed to the office of General Partner
               (which currently is located at 2250 E. Imperial Highway, El
               Segundo, CA 90245) within ten (10) Business Days of the exchange
               or redemption with respect thereto. Notwithstanding anything to
               the contrary contained herein, any and all Series D Preferred
               Units to be exchanged for REIT Series D Preferred Shares pursuant
               to this Section 19.9 shall be so exchanged in a single
               transaction at one time. As a condition to exchange, the General
               Partner may require the Holders of Series D Preferred Units to
               make such representations as may be reasonably necessary for the
               General Partner to establish that the issuance of REIT Series D
               Preferred Shares pursuant to the exchange shall not be required
               to be registered under the Securities Act or any state securities
               laws. Any REIT Series D Preferred Shares issued pursuant to this
               Section 19.9 shall be delivered as shares which are duly
               authorized, validly issued, fully paid and nonassessable, free of
               any pledge, lien, encumbrance or restriction other than those
               provided in the Charter, the Bylaws of the General Partner, the
               Securities Act and relevant state securities or blue sky laws.

                    The certificates representing the REIT Series D Preferred
               Shares issued upon exchange of the Series D Preferred Units shall
               contain the following legend:

                    THE SHARES REPRESENTED BY THIS CERTIFICATE MAY NOT
                    BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
                    OTHERWISE DISPOSED OF EXCEPT (A) PURSUANT TO AN EFFECTIVE
                    REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933, AS
                    AMENDED (THE "ACT") AND STATE SECURITIES LAWS OR (B) IF THE
                    CORPORATION HAS BEEN FURNISHED WITH A SATISFACTORY OPINION
                    OF COUNSEL FOR THE HOLDER OF THE SHARES REPRESENTED HEREBY,
                    OR OTHER EVIDENCE SATISFACTORY TO THE CORPORATION, THAT SUCH
                    TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER
                    DISPOSITION IS EXEMPT FROM THE PROVISIONS OF SECTION 5 OF
                    THE ACT AND STATE SECURITIES
<PAGE>

                    LAWS AND THE RULES AND REGULATIONS THEREUNDER.

                    (ii)  In the event of an exchange of Series D Preferred
               Units for REIT Series D Preferred Shares, an amount equal to the
               accrued and unpaid distributions, whether or not declared, to the
               date of exchange on any Series D Preferred Units tendered for
               exchange shall (A) accrue on the REIT Series D Preferred Shares
               into which such Series D Preferred Units are exchanged, and (B)
               continue to accrue on such Series D Preferred Units, which shall
               remain outstanding following such exchange, with the General
               Partner as the Holder of such Series D Preferred Units.
               Notwithstanding anything to the contrary set forth herein, in no
               event shall a Holder of a Series D Preferred Unit that was
               validly exchanged into REIT Series D Preferred Shares pursuant to
               this section (other than the General Partner now holding such
               Series D Preferred Unit), receive a cash distribution out of
               Available Cash of the Partnership, if such Holder, after
               exchange, is entitled to receive a distribution out of Available
               Cash with respect to the share of REIT Series D Preferred Shares
               for which such Series D Preferred Unit was exchanged or redeemed.
               Further for purposes of the foregoing, in the event of an
               exchange of Series D Preferred Units for REIT Series D Preferred
               Shares, if the accrued and unpaid distributions per Series D
               Preferred Unit is not the same for each Series D Preferred Unit,
               the accrued and unpaid distributions per Series D Preferred Unit
               for each such Series D Preferred Unit shall be equal to the
               greatest amount of such accrued and unpaid distributions per
               Series D Preferred Unit on any such unit.

                    (iii) Fractional shares of REIT Series D Preferred Shares
               are not to be issued upon exchange but, in lieu thereof, the
               General Partner will pay a cash adjustment based upon the fair
               market value of the Series D Preferred Stock on the day prior to
               the exchange date as determined in good faith by the Board of
               Directors of the General Partner.

               (c)   Adjustment of Series D Exchange Price.
                     -------------------------------------

                     In case the General Partner shall be a party to any
               transaction (including, without limitation, a merger,
               consolidation, statutory share exchange, tender offer for all or
               substantially all of the General Partner's capital stock or sale
               of all or substantially all of the General Partner's assets), in
               each case as a result of which the REIT Series D Preferred Shares
               will be converted into the right to receive shares of capital
               stock, other securities or other property (including cash or any
               combination thereof), each Series D Preferred Unit will
               thereafter be exchangeable into
<PAGE>

               the kind and amount of shares of capital stock and other
               securities and property receivable (including cash or any
               combination thereof) upon the consummation of such transaction by
               a Holder of that number of REIT Series D Preferred Shares or
               fraction thereof into which one Series D Preferred Unit was
               exchangeable immediately prior to such transaction. The General
               Partner may not become a party to any such transaction unless the
               terms thereof are consistent with the foregoing.

               Section 19.10.  No Exchange Rights.  The Holders of the Series D
                               ------------------
          Preferred Units shall not have any rights to exchange such units into
          shares of any other class or series of stock or into any other
          securities of, or interest in, the Partnership.

               Section 19.11.  No Sinking Fund.  No sinking fund shall be
                               ---------------
          established for the retirement or redemption of Series D Preferred
          Units."

     5.   Governing Law.  This Amendment shall be interpreted and enforced
          -------------
according to the laws of the State of Delaware.

     6.   Full Force and Effect.  Except as amended by the provisions hereof,
          ---------------------
the Agreement, as previously amended, shall remain in full force and effect in
accordance with its terms and is hereby ratified, confirmed and reaffirmed by
the undersigned for all purposes and in all respects.

     7.   Successors/Assigns.  This Amendment shall be binding upon and shall
          ------------------
inure to the benefit of the parties hereto, their respective legal
representatives, successors and assigns.

     8.   Counterparts.  This Amendment may be executed in counterparts, all of
          ------------
which together shall constitute one agreement binding on all the parties hereto,
notwithstanding that all such parties are not signatories to the original or the
same counterpart.



                       (signatures appear on next page)
<PAGE>

     IN WITNESS WHEREOF, the undersigned has executed this Amendment as of the
day and year first above written.

                              GENERAL PARTNER
                              ---------------

                              KILROY REALTY CORPORATION


                              By /s/ Tyler H. Rose
                                ----------------------------------------------
                                    Name: Tyler H. Rose
                                    Title: Senior Vice President and Treasurer



                       (signatures continue on next page)
<PAGE>

                              NEW LIMITED PARTNER
                              -------------------

                              MONTEBELLO REALTY CORP.,
                              a Delaware corporation



                                    By:    /s/ J. Timothy Ford
                                       --------------------------------
                                       Name:  J. Timothy Ford
                                            ---------------------------
                                       Title:  Vice President


<PAGE>

                                                             EXHIBIT 23.1

INDEPENDENT AUDITORS' CONSENT

We consent to the incorporation by reference in Registration Statement No.
333-72229 of Kilroy Realty Corporation on Form S-3, Amendment No. 1 to
Registration Statement No. 333-45097 of Kilroy Realty Corporation on Form S-3
and Registration Statement No. 333-43227 of Kilroy Realty Corporation on Form
S-8 of our report dated March 10, 2000, appearing in this Annual Report on Form
10-K of Kilroy Realty Corporation for the year ended December 31, 1999.

/s/ Deloitte and Touche LLP

Los Angeles, California
March 20, 2000

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 10-K
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

<S>                             <C>                     <C>
<PERIOD-TYPE>                   YEAR                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999             DEC-31-1998
<PERIOD-START>                             JAN-01-1999             JAN-01-1998
<PERIOD-END>                               DEC-31-1999             DEC-31-1998
<CASH>                                          26,116                   6,443
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   24,771                  20,375
<ALLOWANCES>                                   (2,693)                 (1,456)
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                     0                       0
<PP&E>                                       1,410,238               1,194,284
<DEPRECIATION>                               (174,427)               (145,437)
<TOTAL-ASSETS>                               1,320,501               1,109,217
<CURRENT-LIABILITIES>                                0                       0
<BONDS>                                        553,516                 405,383
                                0                       0
                                          0                       0
<COMMON>                                           278                     276
<OTHER-SE>                                     472,651                 475,623
<TOTAL-LIABILITY-AND-EQUITY>                 1,320,501               1,109,217
<SALES>                                              0                       0
<TOTAL-REVENUES>                               159,700                 137,088
<CGS>                                                0                       0
<TOTAL-COSTS>                                   75,162                  65,419
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                 2,158                   1,107
<INTEREST-EXPENSE>                              26,309                  20,568
<INCOME-PRETAX>                                 39,849                  38,822
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                             39,849                  38,822
<DISCONTINUED>                                      46                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    39,895<F1>              38,822<F2>
<EPS-BASIC>                                       1.44                    1.44
<EPS-DILUTED>                                     1.44                    1.43
<FN>
<F1>Net income is after equity in income of unconsolidated subsidiary of $17 and
minority interests of ($16,239)
<F2>Net income is after equity in income of unconsolidated subsidiary of $5 and
minority interests of ($11,177).
</FN>


</TABLE>


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