MARTIN MARIETTA MATERIALS INC
10-K405, 2000-03-27
MINING & QUARRYING OF NONMETALLIC MINERALS (NO FUELS)
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<PAGE>   1

                                                                            1999
- --------------------------------------------------------------------------------

                       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 [No Fee Required]

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 [No Fee Required]

For the transition period from            to

                         Commission file number 1-12744

                        MARTIN MARIETTA MATERIALS, INC.
             (Exact name of registrant as specified in its charter)

        NORTH CAROLINA                                      56-1848578
        (State or other jurisdiction of                   (I.R.S. employer
        incorporation or organization)                   identification no.)

        2710 WYCLIFF ROAD, RALEIGH, NORTH CAROLINA            27607-3033
        (Address of principal executive offices)              (Zip Code)

       Registrant's telephone number, including area code: (919) 781-4550

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

           Title of each class         Name of each exchange on which registered
           -------------------         -----------------------------------------
COMMON STOCK (PAR VALUE $.01 PER SHARE)         NEW YORK STOCK EXCHANGE
(INCLUDING RIGHTS ATTACHED THERETO)

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 the Form 10-K or any
amendment to this Form 10-K. [X]

         The aggregate market value of voting stock (based on the closing price
on the New York Stock Exchange on March 17, 2000 as published in the Wall Street
Journal) held by non-affiliates of the Company was $1,248,307,273. Shares of
Common Stock held by each executive officer and director and by each person who
owns 5% or more of the outstanding Common Stock have been excluded in that such
persons may be deemed to be affiliates. This determination of affiliate status
is not necessarily a conclusive determination for other purposes.

         The number of shares outstanding of each of the Registrant's classes of
common stock on March 17, 2000 as follows:

         COMMON STOCK (PAR VALUE $.01 PER SHARE)         46,727,259 SHARES

                       DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Martin Marietta Materials, Inc. 2000 Proxy Statement are
incorporated by reference into Part III.

Portions of the Martin Marietta Materials, Inc. 1999 Annual Report to
Shareholders are incorporated by reference into Parts I, II and IV.

- --------------------------------------------------------------------------------

<PAGE>   2

                                TABLE OF CONTENTS
PART I                                                                      Page

Item 1       Business..........................................................3

Item 2       Properties.......................................................12

Item 3       Legal Proceedings................................................13

Item 4       Submission of Matters to a Vote of Security Holders..............13

Forward Looking Statements - Safe Harbor Provisions...........................14

Executive Officers of the Registrant..........................................15

PART II

Item 5       Market for the Registrant's Common Equity and Related
             Stockholder Matters..............................................16

Item 6       Selected Financial Data..........................................16

Item 7       Management's Discussion and Analysis of Financial Condition
             and Results of Operations........................................16

Item 7A      Qualitative And Quantitative Disclosures About Market Risk.......16

Item 8       Financial Statements and Supplementary Data......................17

Item 9       Changes in and Disagreements with Accountants on Accounting
             and Financial Disclosure.........................................17

PART III

Item 10      Directors and Executive Officers of the Registrant...............18

Item 11      Executive Compensation...........................................18

Item 12      Security Ownership of Certain Beneficial Owners and Management...18

Item 13      Certain Relationships and Related Transactions...................18

PART IV

Item 14      Exhibits, Financial Statements, Financial Statement Schedules
             and Reports on Form 8-K..........................................19

Signatures....................................................................25


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                                     PART I

ITEM 1.  BUSINESS

GENERAL

         Martin Marietta Materials, Inc. (the "Company") is the United States'
second largest producer of aggregates for the construction industry, including
highways, infrastructure, commercial and residential. The Company also
manufactures and markets magnesia-based products, including heat-resistant
refractory products for the steel industry, chemicals products for industrial,
agricultural and environmental uses, and dolomitic lime. In 1999, the Company's
aggregates business accounted for 89% of the Company's total revenues and the
Company's magnesia-based products segment accounted for 11% of the Company's
total revenues.

         The Company was formed in November 1993 as a North Carolina corporation
to be the successor to substantially all of the assets and liabilities of the
materials group of Martin Marietta Corporation and its subsidiaries. An initial
public offering of a portion of the common stock of the Company (the "Common
Stock") was completed in February 1994 whereby 8,797,500 shares of Common Stock
(representing approximately 19% of the shares outstanding) were sold at an
initial public offering price of $23 per share. Lockheed Martin Corporation,
which was formed as the result of a business combination between Martin Marietta
Corporation and Lockheed Corporation in March 1995, owned approximately 81% of
the Common Stock directly and through its wholly-owned subsidiary, Martin
Marietta Investments Inc., until October 1996.

         In October 1996, the outstanding Common Stock of Martin Marietta
Materials that was held by Lockheed Martin Corporation became available to the
public market when Lockheed Martin disposed of its 81% ownership interest. This
transaction was completed by means of a tax-free exchange offer pursuant to
which Lockheed Martin stockholders were given the opportunity to exchange shares
of Lockheed Martin common stock for shares of the Company's Common Stock, which
resulted in 100% of the outstanding shares of Common Stock being publicly
traded.

         On January 3, 1995, the Company purchased certain assets of Dravo
Corporation relating to its construction aggregates business for a purchase
price of approximately $121 million in cash, plus certain assumed liabilities
(the "Dravo Acquisition"). When acquired, the business had production and
distribution facilities in nine states and the Bahamas. The Dravo Acquisition
added more than 24 million tons of annual production capacity to the Company's
operations. It also expanded the Company's method of conducting business by
adding water distribution by ocean vessels and river barges, in addition to the
use of truck and rail transportation. Further, the Dravo Acquisition expanded
the Company's presence in or sales to nonconstruction aggregate markets,
including the chemical, steel, cement, utility desulfurization, poultry feed and
agricultural lime industries.

         On May 28, 1997, the Company purchased all of the outstanding common
stock of American Aggregates Corporation ("American Aggregates") along with
certain other assets from American Aggregates' former parent, CSR America, Inc.,
for an acquisition price of approximately $242 million in cash plus certain
assumed liabilities (the "American Aggregates Acquisition"). The American
Aggregates Acquisition included the Ohio and Indiana operations of American
Aggregates with 29 production facilities and increased the Company's annual
production capacity by more than 25 million



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tons -- in addition to adding over 1 billion tons of mineral reserves, of which
approximately 700 million were zoned for production, and 11,000 acres of
property. American Aggregates is a leading supplier of aggregates products in
Indianapolis, Cincinnati, Dayton and Columbus.

         On December 4, 1998, the Company acquired the common stock of Redland
Stone Products Company ("Redland Stone") from an affiliate of Lafarge SA for
$272 million in cash plus normal balance sheet liabilities, subject to certain
post-closing adjustments relating to working capital, plus approximately $8
million estimated for certain other assumed liabilities and transaction costs.
The Company did not assume any long-term debt of Redland Stone. Redland Stone is
a leading producer of aggregates and asphaltic concrete in the state of Texas
and has mineral reserves which exceed 1.0 billion tons. Redland Stone expanded
the Aggregates division's business by adding operating facilities in the
southwest United States, expanding the Company's presence in the asphalt
production business and adding significant long-term mineral reserve capacity.

         As of October 31, 1998, the Company purchased an initial 14% interest
in the business of Meridian Aggregates Company ("Meridian"). The transaction
provides a mechanism for the Company to purchase the remaining interest in
Meridian at a predetermined formula price within five years, and the Meridian
investors may require the Company to purchase their interests beginning December
31, 2000, or earlier in the event of the death of an investor. In 1999, Meridian
operated 26 aggregates production facilities and eight rail-served distribution
yards in 11 states in the southwestern and western United States with
approximately 1.4 billion tons of mineral reserves.

         The Company announced in February 1997 that it had entered into
agreements giving the Company rights to commercialize certain proprietary
technologies related to the Company's business. One of the agreements gives the
Company the opportunity to pursue the use of certain composites technology for
products where corrosion resistance and high strength-to-weight ratios are
important factors, such as bridge decks, marine applications and other
structures. In addition, as part of the American Aggregates Acquisition, the
Company is working on certain technology related to remineralization of soil and
microbial products for enhanced plant growth. The Company continued its research
and development activities during 1999 in these new product areas, and began
manufacturing and marketing certain of the products. These technologies, if
fully developed by the Company, would complement and expand the Company's
business. Also, in 1999 the Company made an investment in a start-up company,
Industrial Microwave Systems, that has proprietary technology for use in
applications related to industrial heating and drying, food processing and
aseptic packaging. There can be no assurance that any of the technologies will
become profitable.

BUSINESS SEGMENT INFORMATION

         The Company operates in two reportable business segments. These
segments are aggregates products and magnesia-based products, chemicals,
refractories and dolomitic lime. Information concerning the Company's net sales,
operating profit, assets employed and certain additional information
attributable to each reportable industry segment for each year in the three-year
period ended December 31, 1999 is included in "Management's Discussion and
Analysis of Financial Condition and Results of Operations" on pages 26 through
39 of the Company's 1999 Annual Report to Shareholders (the "1999 Annual
Report"), which information is incorporated herein by reference.


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AGGREGATES

         The Company's aggregates segment processes and sells granite,
sandstone, limestone, sand and gravel and other aggregates products for use in
all sectors of the public infrastructure, commercial and residential
construction industries. The Company is the United States' second largest
producer of aggregates. In 1999, the Company shipped approximately 165 million
tons of aggregates primarily to customers in 24 southeastern, southwestern,
midwestern and central states, generating net sales and earnings from operations
of $1.1 billion and $208 million, respectively.

         The Aggregates division markets its products primarily to the
construction industry, with approximately one-half of its shipments made to
contractors in connection with highway and other public infrastructure projects
and the balance of its shipments made primarily to contractors in connection
with commercial and residential construction projects. As a result of dependence
upon the construction industry, the profitability of aggregates producers is
sensitive to national, regional and local economic conditions, and particularly
to cyclical swings in construction spending, which is affected by fluctuations
in interest rates, and demographic and population shifts and to changes in the
level of infrastructure spending funded by the public sector. The Company's
aggregates business is concentrated principally in the southeast, southwest,
midwest and central states. Aggregates products are sold and shipped from a
network of approximately 300 quarries and distribution facilities in more than
20 states, although the Company's five largest shipment states account for
approximately 61% of total sales. The Company's business is accordingly affected
by the economies in these regions. The addition of the Dravo operations opened
extensive markets for the aggregates business along the Ohio and Mississippi
River systems from western Pennsylvania throughout the central and southern
United States. The distribution centers acquired along the Gulf of Mexico and
Atlantic coasts, as well as operating facilities in the Bahamas, provided entry
into those markets for aggregates. The Gulf and Atlantic coastal areas are being
supplied primarily from the Bahamas location, two large quarries on the Ohio
River system and a Canadian quarry on the Strait of Canso in Nova Scotia, the
assets related to which were purchased in October 1995 by the Company (the
"Canadian Acquisition"). In addition, the Company's recent acquisitions have
expanded its ability to ship by rail. Accordingly, in addition to increasing the
Company's geographic presence through acquisitions, the Company has also
enhanced its reach through its ability to provide cost-effective coverage of
certain coastal markets on the east coast and reaching as far as Texas, and to
ship products in and to Canada, the Caribbean and parts of South America, as
well as to additional geographic areas which can be accessed economically by its
expanded distribution system.

         The Company's aggregates business is also highly seasonal, due
primarily to the effect of weather conditions on construction activity within
its markets. As a result of the American Aggregates Acquisition and several
other smaller acquisitions in the north central region of the United States,
more of the Company's aggregates operations have exposure to weather-related
risk during the winter months. The division's operations that are concentrated
principally in the north central region of the Midwest generally experience more
severe winter weather conditions than the division's operations in the Southeast
and Southwest. Due to these factors, the Company's second and third quarters are
generally the strongest, with the first quarter generally reflecting the weakest
results.

         Aggregates can be found in abundant quantities throughout the United
States, and there are many producers nationwide. However, as a general rule,
shipments from an individual quarry are limited because the cost of transporting
processed aggregates to customers is high in relation to the



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value of the product itself. As a result, proximity of quarry facilities to
customers is the most important factor in competition for aggregates business
and helps explain the highly fragmented nature of the aggregates industry. The
Company's distribution system mainly uses trucks. Access to a lower-cost,
extensive river barge and ocean vessel network was provided as a result of
certain acquisitions made by the Company, including the Dravo Acquisition and
the Canadian Acquisition. The Redland Stone transaction and other recent
acquisitions in Texas have enabled the Company to extend its reach through
increased access to rail transportation.

         Historically, the Company has focused on the production of aggregates
and has not integrated vertically in a substantial manner into other
construction materials businesses. In recent transactions, the Company has
acquired asphaltic concrete, ready-mixed concrete, paving construction and other
businesses which establish vertical integration that complement its aggregates
business. These products and services are not a significant component of the
Company's aggregates operations.

         Environmental and zoning regulations have made it increasingly
difficult for the construction aggregates industry to expand existing quarries
and to develop new quarry operations. Although it cannot be predicted what
policies will be adopted in the future by federal, state and local governmental
bodies regarding these matters, the Company anticipates that future restrictions
will likely make zoning and permitting more difficult thereby potentially
enhancing the value of the Company's existing mineral reserves.

         Management believes the Aggregates division's raw material reserves are
sufficient to permit production at present operational levels for the
foreseeable future. The Company does not anticipate any material difficulty in
obtaining the raw materials that it uses for production in its aggregates
segment.

         The Company generally delivers products in its aggregates segment upon
receipt of orders or requests from customers. Accordingly, there is no
significant backlog information. Inventory of aggregates is generally maintained
in sufficient quantities to meet rapid delivery requirements of customers.

MAGNESIA SPECIALTIES

         The Company also manufactures and markets dolomitic lime and
magnesia-based products, including heat-resistant refractory products for the
steel industry and magnesia-based chemicals products for industrial,
agricultural and environmental uses, including wastewater treatment, sulfur
dioxide scrubbing and acid neutralization. In 1999, the Company's Magnesia
Specialties division generated net sales of $133 million and earnings from
operations of $7 million. Magnesia Specialties' refractory and dolomitic lime
products are sold primarily to the steel industry. Accordingly, the division's
profitability depends on the production of steel and the related marketplace,
and a significant portion of the division's product pricing structure is
affected by current economic conditions within the steel industry.

         In 1999, the division's major product areas continued to be negatively
impacted by global steel industry conditions. Foreign steel imports that flooded
the United States' markets in 1998, slowed during 1999 as these foreign
economies began to improve. However, no broad tariffs or duties were passed to
provide long-term restriction of foreign steel imports. The division's
steel-related product



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areas' performance followed the steel industry's performance. Refractories and
dolomitic lime products continued to experience declining volumes and sales
during 1999 as a result of instabilities in the steel industry. While
refractories and dolomitic lime volumes and sales improved in the second half of
1999 compared with the second half of 1998, pricing pressures continued as the
steel industry exercised its pricing power. Also, consolidation among
manufacturers of refractory brick may remove a significant periclase customer
from the market. The division's chemicals products achieved record volume and
sales in 1999, as a result of increased sales in chemicals used as flame
retardants and in wastewater treatment. The division also added several new
customers that utilize fuel-oil additives that reduce stack pollution. Further,
improving Asian economies reduced the global pressures experienced in the
chemicals products during 1998. However, competitive pricing pressures continued
throughout 1999.

         The principal raw materials used in the Company's Magnesia Specialties
division's products are dolomitic lime, brine and imported magnesia. Management
believes that its reserves of dolomitic limestone to produce dolomitic lime and
its reserves of brine are sufficient to permit production at present operational
levels for the foreseeable future. The supply of natural and synthetic magnesia
is abundant worldwide. In 1999, the Company purchased some of its magnesia
requirements from various sources located in China. While the Company does not
expect an interruption in the supply of magnesia from these sources, various
factors associated with economic and political uncertainty in China could result
in future supply interruptions. If such an interruption were to occur, the
Company believes it could obtain alternate supplies worldwide, although there
could be no assurance that the Company could do so at current prices.
Alternatively, the Company believes it could adjust its mix of products and/or
increase production capacity at its Manistee, Michigan, operation.

         The Company generally delivers its Magnesia Specialties division's
products upon receipt of orders or requests from customers. Accordingly, there
is no significant backlog information. Inventory for the Magnesia Specialties
division's products is generally maintained in sufficient quantities to meet
rapid delivery requirements of customers. The Company has provided extended
payment terms to certain international customers.

         The Company announced in 1999 that it was considering various
alternatives related to the Magnesia Specialties division which may present
opportunities to create additional value for the Company and its shareholders.
The Company can give no assurance that additional value will be created from the
alternatives being explored with respect to the Magnesia Specialties division.

PATENTS AND TRADEMARKS

         As of March 17, 2000, the Company owns, has the right to use, or has
pending applications for approximately 93 patents pending or granted by the
United States and various countries and approximately 109 trademarks related to
its Magnesia Specialties business and its developing technologies and services
business. The Company believes that its rights under its existing patents,
patent applications and trademarks are of value to its operations, but no one
patent or trademark or group of patents or trademarks is material to the conduct
of the Company's business as a whole.


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CUSTOMERS

         No material part of the business of either segment of the Company is
dependent upon a single customer or upon a few customers, the loss of any one of
which would have a material adverse effect on the segment. The Company's
products are sold principally to commercial customers in private industry.
Although large amounts of construction materials are used in public works
projects, relatively insignificant sales are made directly to federal, state,
county or municipal governments, or agencies thereof.

COMPETITION

         Because of the impact of transportation costs on the aggregates
business, competition tends to be limited to producers in proximity to the
Company's individual production facilities. Although all of the Company's
locations experience competition, the Company believes that it is generally a
leading producer in the areas it serves. Competition is based primarily on
quarry location and price, but quality of aggregates and level of customer
service are also factors.

         The Company is the second largest producer of aggregates in the United
States based on tons shipped. There are over 4,000 companies in the United
States that produce aggregates. The largest five producers account for less than
25% of the total market. The Company competes with a number of other large and
small producers. The Company believes that its ability to transport materials by
ocean vessels and river barges as a result of certain acquisitions made by the
Company, including the Dravo Acquisition and the Canadian Acquisition, and its
increased access to rail transportation as a result of the Redland Stone and
other transactions, has enhanced the Company's ability to compete in certain
extended areas. Certain of the Company's competitors in the aggregates industry
have greater financial resources than the Company.

         The Magnesia Specialties division of the Company competes with various
companies in different geographic and product areas. The Company believes that
the Magnesia Specialties division is one of the largest suppliers of monolithic
(unshaped) refractory products and dolomitic lime to the steel industry in the
United States and one of the largest suppliers of magnesia-based chemicals
products to various industries. The Company's largest competitors for monolithic
refractory sales are Mineral Technologies, Inc. and Cookson Group, PLC, and its
largest competitor for hydroxide slurry is The Dow Chemical Company. The
division competes principally on the basis of quality, price and technical
support for its products. The Magnesia Specialties division also competes for
sales to customers located outside the United States with sales to such
customers accounting for approximately $21.0 million in sales in 1999
(representing approximately 16% of total sales of the Magnesia Specialties
segment) principally in Canada, Mexico, the United Kingdom, Germany and Korea.
The Magnesia Specialties division's sales to foreign customers were $20.5
million in 1998 and $24.1 million in 1997.


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RESEARCH AND DEVELOPMENT

         The Company conducts research and development activities for its
Magnesia Specialties segment at its laboratory located near Baltimore, Maryland
and at various locations for the new proprietary technologies. In general, the
Company's research and development efforts are directed to applied technological
development for the use of its refractories and chemicals products and for
composite materials, soil remineralization products, microbial products, a
laser-measuring device and a microwave technology. The Company spent
approximately $2.8 million in 1999, $3.1 million in 1998 and $3.4 million in
1997 on research and development activities.

ENVIRONMENTAL REGULATIONS

         The Company's operations are subject to and affected by federal, state
and local laws and regulations relating to the environment, health and safety
and other regulatory matters. Certain of the Company's operations may from time
to time involve the use of substances that are classified as toxic or hazardous
substances within the meaning of these laws and regulations. Environmental
operating permits are, or may be, required for certain of the Company's
operations and such permits are subject to modification, renewal and revocation.
The Company regularly monitors and reviews its operations, procedures and
policies for compliance with these laws and regulations. Despite these
compliance efforts, risk of environmental liability is inherent in the operation
of the Company's businesses, as it is with other companies engaged in similar
businesses, and there can be no assurance that environmental liabilities will
not have a material adverse effect on the Company in the future. In accordance
with the Company's accounting policy for environmental costs, amounts are not
accrued and included in the Company's financial statements until it is probable
that a liability has been incurred and such amount can be estimated reasonably.
The environmental accruals are the estimate based on internal studies of the
required remediation costs and generally not discounted to their present value
or offset for potential insurance or other claims. Costs incurred by the Company
in connection with environmental matters in the preceding two fiscal years were
not material to the Company's operations or financial condition.

         The Company believes that its operations and facilities, both owned or
leased, are in substantial compliance with applicable laws and regulations and
that any noncompliance is not likely to have a material adverse effect on the
Company's operations or financial condition. See "Legal Proceedings" on page 13
of this Form 10-K and "Note M: Commitments and Contingencies" of the "Notes to
Financial Statements" on page 25 and "Management's Discussion and Analysis of
Financial Condition and Results of Operations" on pages 26 through 39 of the
1999 Annual Report. However, future events, such as changes in or modified
interpretations of existing laws and regulations or enforcement policies, or
further investigation or evaluation of the potential health hazards of certain
products or business activities, may give rise to additional compliance and
other costs that could have a material adverse effect on the Company.

         In general, quarry sites must comply with noise, water discharge and
air quality regulations, zoning and special use permitting requirements,
applicable mining regulations and federal health and safety requirements. As new
quarry sites are located and acquired, the Company works closely with local
authorities during the zoning and permitting processes to design new quarries in
such a way as to minimize disturbances. The Company frequently acquires large
tracts of land so that quarry and production facilities can be situated
substantial distances from surrounding property owners. The



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Company maintains a centralized blasting function for its quarry operations, and
has established policies designed to minimize disturbances to surrounding
property owners.

         The Company is required by state laws to reclaim quarry sites after
use. The Company generally reclaims its quarries on an ongoing basis, reclaiming
mined-out areas of the quarry while continuing operations at other areas of the
site. Historically, the Company has not incurred extraordinary or substantial
costs in connection with the closing of quarries. Reclaimed quarry sites owned
by the Company are available for sale, typically for commercial development or
use as reservoirs.

         As is the case with other companies in the same industries, some of the
Company's products contain varying amounts of crystalline silica, a common
mineral. Excessive, prolonged inhalation of very small-sized particles of
crystalline silica has been associated with non-malignant lung disease. The
carcinogenic potential of crystalline silica was evaluated by the International
Agency for Research on Cancer and later by the U.S. National Toxicology Program.
In 1987, the agency found limited evidence of carcinogenicity in humans but
sufficient evidence of carcinogenicity in animals. The National Toxicology
Program concluded in 1991 that crystalline silica is "reasonably anticipated to
be a carcinogen." In October 1996, the International Agency for Research on
Cancer issued another report stating that "inhaled crystalline silica in the
form of quartz or cristobalite from occupational sources is carcinogenic to
humans." The Mine Safety and Health Administration has included the development
of a crystalline silica standard as one of its long-term goals. The Company,
through safety information sheets and other means, communicates what it believes
to be appropriate warnings and cautions to employees and customers about the
risks associated with excessive, prolonged inhalation of mineral dust in general
and crystalline silica in particular.

         The EPA in November 1996 proposed certain changes to the regulations
relating to the standard for particulate matter in connection with air quality,
which were recently placed into law as the National Ambient Air Quality
Standards. The new law places an ambient air limit on the emission of fine
particles (smaller than 2.5 microns) that typically result from industrial,
motor vehicle and power generation fuel combustion, in addition to the coarse
particles previously regulated. As adopted, the regulations impact many
industries, including the aggregates industry. The National Stone Association
("NSA") has joined a lawsuit with many other industries challenging the standard
and the lack of scientific data available supporting the limits and the ability
of industry to monitor the pollutant. In May 1999, the United States Court of
Appeals for the District of Columbia overturned the EPA's PM2.5 and ozone
national ambient air quality standards. The EPA has requested review of the
decision to the United States Supreme Court.

         At the Magnesia Specialties division's Manistee, Michigan, facility,
the Company maintains a stockpile of off-specification magnesia and binder
materials, and fine-particle product generated in processing magnesium oxide.
These materials are used at the Manistee plant as a portion of the feed stock
for producing certain of its magnesium oxide products. In 1986, the U.S.
Environmental Protection Agency (the "EPA") investigated the stockpile for
possible designation under the Comprehensive Environmental Response Compensation
and Liability Act (the "Superfund" statute), but has not taken any action since
that date. The site remains on Michigan's Act 201 list, a state superfund list.
In addition, the Michigan Department of Environmental Quality (the "DEQ")
reviewed information submitted by the Company to determine the appropriate
classification of the pile. In 1998



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the DEQ classified the pile as "low hazard industrial waste," and in August 1999
determined that no license is required from the Company for the continued
storage of these recyclable materials.

         As a result of the processing of dolomitic limestone at the Magnesia
Specialties division's Woodville, Ohio, facility, lime kiln dust ("LKD") is
produced as a by-product. The Ohio Environmental Protection Agency ("OEPA")
promulgated regulations that apply to the disposal of LKD. The Company executed
an administrative order with the OEPA on November 24, 1997 requiring the Company
to submit a permit application for a landfill by May 1998, which was duly
submitted. Regulations proposed by OEPA in February 2000 were withdrawn after
public comment from the Ohio lime producers indicated that the proposed rules
were not likely to achieve the desired goals. The Company, along with the
National Lime Association and other lime producers, continue to work with the
OEPA to develop a consensus approach to determine if changes to the current
scope of the regulations are appropriate. Depending upon the result of these
ongoing discussions, the Company may be required to incur certain compliance
costs. The Company believes that any such costs would not have a material
adverse effect on the Company's operations or its financial condition but can
give no assurance that the compliance costs will not have a material adverse
effect on the financial condition or results of the Magnesia Specialties
segment's operations.

         The Clean Air Act Amendments of 1990 require the EPA to develop
regulations for a broad spectrum of industrial sectors that emit hazardous air
pollutants, including lime manufacturing. The new standards to be established
would require plants to install feasible control equipment for certain hazardous
air pollutants, thereby significantly reducing air emissions. The Company is
actively participating with other lime manufacturers in working with the EPA to
define test protocols, better define the scope of the standards, determine the
existence and feasibility of various technologies, and develop realistic
emission limitations and continuous emissions monitoring/reporting requirements
for the lime industry. The EPA has conducted testing at lime manufacturing
facilities located in Alabama, Texas and Ohio, including the Company's Woodville
facility, the results of which were discussed with the EPA in 1999 to determine
whether the facilities should be subject to these regulations. The current
deadline for establishing the technology-based standards for the industry is
November 15, 2000. The Company will not be able to determine the applicability
of the new regulations or the cost associated with any required standards until
the emission standards are adopted. The Company believes that any costs
associated with the upgrade and/or replacement of equipment required to comply
with the new regulations would not have a material adverse effect on the
Company's operations or its financial condition but can give no assurance that
the compliance costs will not have a material adverse effect on the financial
condition or results of the Magnesia Specialties segment's operations.

         In February 1998, the Georgia Department of Natural Resources ("GDNR")
determined that both the Company and the Georgia Department of Transportation
("GDOT") are responsible parties for investigation and remediation at the
Company's Camak Quarry in Thomson, Georgia, due to the discovery of
trichloroethene ("TCE") above its naturally occurring background concentration
in a drinking water well on site. The Company provided the GDNR with information
indicating that the source of the release was either from an asphalt plant that
was on the site in the early 1970's or from a maintenance shop that was operated
on the property in the 1940's and 1950's before the Company purchased the
property. The Company was designated a responsible party by virtue of its
ownership of the property. The Company entered into a Consent Order with GDNR to
conduct an environmental assessment of the site and file a report of the
findings. The Company and GDOT signed an agreement to share evenly the costs of
the assessment work. Georgia law provides that responsible parties are



                                       11
<PAGE>   12

jointly and severally liable and, therefore, the Company is potentially liable
for the full cost of funding the investigation and any necessary remediation. If
the Company is required to fund the entire cost of such remediation, the
statutory framework provides that the Company may pursue rights of contribution
from the other responsible parties. Management believes any costs incurred by
the Company associated with the site will not have a material adverse effect on
the Company's operations or its financial condition.

         In December 1998, the GDNR determined that the Company, the GDOT and
two other parties which operated an asphalt plant are responsible parties for
investigation and remediation at the Company's Ruby Quarry in Macon, Georgia.
The Company was designated by virtue of its ownership of the property. GDOT was
designated because it caused a release of TCE above its naturally occurring
background concentration in the groundwater at the site. The two other parties
were designated because both entities operated the asphalt plant at the site.
The groundwater contamination was discovered when the Company's tenant vacated
the premises and environmental testing was conducted. The Company and GDOT
signed an agreement to share the costs of the assessment work. If the Company is
required to fund the cost of remediation, the Company will pursue its right of
contribution from the responsible parties. Management believes any costs
incurred by the Company associated with the site will not have a material
adverse effect on the Company's operations or its financial condition.

EMPLOYEES

         As of March 17, 2000, the Company has approximately 6,100 employees.
Approximately 4,500 are hourly employees and approximately 1,600 are salaried
employees. Included among these employees are approximately 1,200 hourly
employees represented by labor unions. Approximately 21% of the Company's
Aggregates division's hourly employees are members of a labor union, while 97%
of the Magnesia Specialties division's hourly employees are represented by labor
unions. The Company's principal union contracts cover employees at the Manistee,
Michigan, magnesia-based products plant and the Woodville, Ohio lime plant. The
current Manistee labor union contract was ratified in August 1999 and expires in
2003. The Woodville labor union contract expires in June 2000. In 1996, the
previous renewal of the Woodville labor union contract was renegotiated without
any disruption to normal operations although there can be no assurance that a
successor agreement will be reached or that a work stoppage will not occur. The
Company considers its relations with its employees to be good.

ITEM 2.  PROPERTIES

AGGREGATES

         As of March 17, 2000, the Company processed or shipped aggregates from
289 quarries and distribution yards in 23 states in the southeast, southwest,
midwest and central United States and in Canada and the Bahamas, of which 83 are
located on land owned by the Company free of major encumbrances, 58 are on land
owned in part and leased in part, 136 are on leased land, and 12 are on
facilities neither owned nor leased, where raw materials are removed under an
agreement. In addition, the Company processed and shipped ready mixed concrete
and/or asphalt products from 23 properties in 4 states in the southern United
States, of which 11 are located on land owned by the Company free of major
encumbrances, 2 are on land owned in part and leased in part and 10 are on
leased land.



                                       12
<PAGE>   13

MAGNESIA SPECIALTIES

         The Magnesia Specialties division currently operates major
manufacturing facilities in Manistee, Michigan and Woodville, Ohio, and smaller
processing plants in River Rouge, Michigan; Bridgeport, Connecticut; Baton
Rouge, Louisiana; Lenoir City, Tennessee; Pittsburgh, Pennsylvania; and Mobile,
Alabama. All of these facilities are owned, except Pittsburgh and Lenoir City,
which are leased. In addition, the Company has entered into several third-party
toll-manufacturing agreements pursuant to which it processes various chemical
and refractory products.

OTHER PROPERTIES

         The Company's corporate headquarters, which it owns, is located in
Raleigh, North Carolina. The Company owns and leases various administrative
offices and research and development laboratories for its Aggregates division
and its Magnesia Specialties division.

         The Company's principal properties, which are of varying ages and are
of different construction types, are believed to be generally in good condition,
are well maintained, and are generally suitable and adequate for the purposes
for which they are used. The principal properties are believed to be utilized at
average productive capacities of approximately 85% and are capable of supporting
a higher level of market demand.

ITEM 3.  LEGAL PROCEEDINGS

         From time to time claims are asserted against the Company arising out
of its operations in the normal course of business. In the opinion of management
of the Company (which opinion is based in part upon consideration of the opinion
of counsel), it is unlikely that the outcome of litigation and other proceedings
relating to the Company, including those relating to environmental matters and
those described specifically below, will have a material adverse effect on the
Company's operations or its financial condition; however, there can be no
assurance that an adverse outcome in any of such litigation would not have a
material adverse effect on the Company.

         See also "Note M: Commitments and Contingencies" of the "Notes to
Financial Statements" on page 25 of the 1999 Annual Report and "Management's
Discussion and Analysis of Financial Condition and Results of Operations" on
page 39 of the 1999 Annual Report.

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

         No matters were submitted to a vote of security holders during the
fourth quarter of 1999.


                                       13
<PAGE>   14

               FORWARD LOOKING STATEMENTS - SAFE HARBOR PROVISIONS

         This Annual Report on Form 10-K contains statements which constitute
"forward looking statements" within the meaning of Section 27A of the Securities
Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Investors
are cautioned that all forward looking statements involve risks and
uncertainties, including those arising out of economic, climatic, political,
regulatory, competitive and other factors. The forward looking statements in
this document are intended to be subject to the safe harbor protection provided
by Sections 27A and 21E. For a discussion identifying some important factors
that could cause actual results to vary materially from those anticipated in the
forward looking statements see the Corporation's Securities and Exchange
Commission filings, including but not limited to, the discussion of
"Competition" on page 8 of this Annual Report on Form 10-K, "Management's
Discussion and Analysis of Financial Condition and Results of Operations" on
pages 26 through 39 of the 1999 Annual Report and "Note A: Accounting Policies"
and "Note M: Commitments and Contingencies" of the "Notes to Financial
Statements" on pages 16 through 18 and 25, respectively, of the Audited
Consolidated Financial Statements included in the 1999 Annual Report.



                                       14
<PAGE>   15

                      EXECUTIVE OFFICERS OF THE REGISTRANT


         The following sets forth certain information regarding the executive
officers of Martin Marietta Materials, Inc. as of March 17, 2000:

<TABLE>
<CAPTION>
                                 PRESENT POSITION              YEAR ASSUMED        OTHER POSITIONS AND OTHER BUSINESS
            NAME           AGE   AT MARCH 17, 2000           PRESENT POSITION     EXPERIENCE WITHIN THE LAST FIVE YEARS
            ----           ---   -----------------           ----------------     -------------------------------------
<S>                        <C>   <C>                               <C>            <C>

Stephen P. Zelnak, Jr.     55    Chairman of the                   1997           Vice Chairman of the Board of Directors
                                 Board of Directors                               of Martin Marietta Materials, Inc. (1996-1997)
                                 of Martin Marietta
                                 Materials, Inc.;
                                 President and Chief               1993
                                 Executive Officer
                                 of Martin Marietta
                                 Materials, Inc.;
                                 President of Aggregates           1993
                                 Division

Philip J. Sipling          52    Executive Vice President          1997           Senior Vice President of Martin Marietta
                                 of Martin Marietta                               Materials, Inc. (1993-1997); President of
                                 Materials, Inc.;                                 Magnesia Specialties Division (1993-1997)
                                 Chairman of Magnesia              1997
                                 Specialties Division;
                                 Executive Vice President of       1993
                                 Aggregates Division

Janice K. Henry            48    Senior Vice President;            1998           Vice President, Martin Marietta Materials, Inc.
                                 Chief Financial Officer;          1994           (1994-1998)
                                 Treasurer                         1996

Robert R. Winchester       62    Senior Vice President             1993           Executive Vice President
                                 of Martin Marietta                               of Aggregates Division (1993-1999)
                                 Materials, Inc.

Bruce A. Deerson           48    Vice President and                1993           Corporate Secretary (1993 - 1997)
                                 General Counsel

Donald J. Easterlin, III   58    Vice President,                   1994
                                 Business Development

Donald M. Moe              55    Vice President                    1999           Vice President - General Manager,
                                 of Martin Marietta                               Martin Marietta Aggregates
                                 Materials, Inc.;                                 Eastern Carolina Region (1993 - 1996)
                                 Senior Vice President of          1999
                                 Aggregates Division
                                 President-Carolina Division       1996

Jonathan T. Stewart        51    Vice President,                   1993
                                 Human Resources
</TABLE>


                                       15
<PAGE>   16

                                     PART II

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

         There were approximately 1,550 holders of record of Martin Marietta
Materials, Inc. Common Stock, $.01 par value, as of March 17, 2000. The
Company's Common Stock is traded on the New York Stock Exchange (Symbol: MLM).
Information concerning stock prices and dividends paid is included under the
caption "Quarterly Performance (Unaudited)" on page 40 of the 1999 Annual
Report, and that information is incorporated herein by reference.

         On December 7, 1998, the Company sold $200,000,000 aggregate principal
amount of 5.875% Notes due 2008 (the "Notes") to Goldman, Sachs & Co., J.P.
Morgan Securities Inc. and Morgan Stanley & Co. Incorporated, as initial
purchasers (the "Initial Purchasers"). Aggregate discounts and commissions to
the Initial Purchasers were $2,326,000. The Notes were sold to the Initial
Purchasers in a transaction not involving a public offering in reliance on the
exemption from registration provided by Section 4(2) of the Securities Act of
1933 and Rule 144A. The Notes were exchanged into registered notes with
substantially identical terms pursuant to an Offer to Exchange by the Company
pursuant to a registration statement on Form S-4 (Registration No. 333-71793),
effective February 18, 1999.

ITEM 6.  SELECTED FINANCIAL DATA

         The information required in response to this Item 6 is included under
the caption "Five Year Summary" on page 41 of the 1999 Annual Report, and that
information is incorporated herein by reference.

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

         The information required in response to this Item 7 is included under
the caption "Management's Discussion and Analysis of Financial Condition and
Results of Operations" on pages 26 through 39 of the 1999 Annual Report, and
that information is incorporated herein by reference.

ITEM 7A. QUALITATIVE AND QUANTITATIVE DISCLOSURES ABOUT
         MARKET RISK

         The Company does not hold or issue derivative financial instruments for
trading purposes. The Company, from time to time, uses on a limited basis
derivative financial instruments to manage its exposure to fluctuations in
interest rates and foreign exchange rates. In such case, the aggregate value of
derivative financial instruments held or issued by the Company is not material
to the Company nor is the market risk posed. The Company did not use any
derivative financial instruments in 1999. For additional discussion of the
Company's market risk see "Management's Discussion and Analysis of Financial
Condition and Results of Operations, Capital Structure and Resources" on pages
37 through 39 of the 1999 Annual Report and "Note A: Accounting Policies and
Accounting Changes" of the



                                       16
<PAGE>   17

Notes to Consolidated Financial Statements on pages 17 and 18 of the Audited
Consolidated Financial Statements included in the 1999 Annual Report, and that
information is incorporated herein by reference.

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

         The information required in response to this Item 8 is included under
the caption "Consolidated Statement of Earnings," "Consolidated Balance Sheet,"
"Consolidated Statement of Cash Flows," "Consolidated Statement of Shareholders'
Equity," "Notes to Financial Statements," "Management's Discussion and Analysis
of Financial Condition and Results of Operations" and "Quarterly Performance
(Unaudited)" on pages 12 through 40 of the 1999 Annual Report, and that
information is incorporated herein by reference.

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

         None.



                                       17
<PAGE>   18

                                    PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

         The information concerning directors required in response to this Item
10 is included under the captions "Election of Directors" and "Compliance With
Section 16(a) of the Exchange Act" in the Company's definitive proxy statement
to be filed with the Securities and Exchange Commission pursuant to Regulation
14A within 120 days after the close of the Company's fiscal year ended December
31, 1999 (the "2000 Proxy Statement"), and that information is hereby
incorporated by reference in this Form 10-K. Information concerning executive
officers of the Company required in response to this Item 10 is included in Part
I on page 15 of this Form 10-K.

ITEM 11. EXECUTIVE COMPENSATION

         The information required in response to this Item 11 is included under
the captions "Executive Compensation" and "Compensation Committee Interlocks and
Insider Participation in Compensation Decisions" in the Company's 2000 Proxy
Statement, and that information, except for the information required by Items
402(k) and (l) of Regulation S-K, is hereby incorporated by reference in this
Form 10-K.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND
         MANAGEMENT

         The information required in response to this Item 12 is included under
the captions "Voting Securities and Record Date" and "Beneficial Ownership of
Shares" in the Company's 2000 Proxy Statement, and that information is hereby
incorporated by reference in this Form 10-K.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

         The information required in response to this Item 13 is included under
the captions "Compensation Committee Interlocks and Insider Participation in
Compensation Decisions," and "Certain Related Transactions" in the Company's
2000 Proxy Statement, and that information is hereby incorporated by reference
in this Form 10-K.


                                       18
<PAGE>   19

                                     PART IV


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

(a) (1) LIST OF FINANCIAL STATEMENTS FILED AS PART OF THIS FORM 10-K.

         The following consolidated financial statements of Martin Marietta
         Materials, Inc. and consolidated subsidiaries, included in the 1999
         Annual Report, are incorporated by reference into Item 8 on page 17 of
         this Form 10-K. Page numbers refer to the 1999 Annual Report:

                                                                     Page

              Consolidated Balance Sheet--                            13
                December 31, 1999 and 1998

              Consolidated Statement of Earnings--                    12
                Years ended December 31, 1999, 1998 and 1997

              Consolidated Statement of Shareholders' Equity--        15
                Years ended December 31, 1999, 1998 and 1997

              Consolidated Statement of Cash Flows--                  14
                Years ended December 31, 1999, 1998 and 1997

              Notes to Financial Statements--                     16 through 25


    (2) LIST OF FINANCIAL STATEMENT SCHEDULES FILED AS PART OF THIS FORM 10-K

         The following financial statement schedule of Martin Marietta
         Materials, Inc. and consolidated subsidiaries is included in Item
         14(d). The page number refers to this Form 10-K.

         Schedule II - Valuation and Qualifying Accounts...........   24

         All other schedules have been omitted because they are not applicable,
         not required, or the information has been otherwise supplied in the
         financial statements or notes to the financial statements.

         The report of the Company's independent auditors with respect to the
         above-referenced financial statements appears on page 10 of the 1999
         Annual Report, and that report is hereby incorporated by reference in
         this Form 10-K. The report on the financial statement schedule and the
         consent of the Company's independent auditors appear on page 128 of
         this Form 10-K.



                                       19
<PAGE>   20

    (3)  EXHIBITS

         The list of Exhibits on the accompanying Index of Exhibits on pages 21
         through 23 of this Form 10-K is hereby incorporated by reference. Each
         management contract or compensatory plan or arrangement required to be
         filed as an exhibit is indicated by asterisks.

(b)      REPORTS ON FORM 8-K

         The Company filed Current Report on Form 8-K on February 2, 1999 and
         Current Report on Form 8-K/A on February 17, 1999.


                                       20
<PAGE>   21

(c)      INDEX OF EXHIBITS

Exhibit
   No.
- -------

  3.01            --Restated Articles of Incorporation of the Company, as
                           amended (incorporated by reference to Exhibits 3.1
                           and 3.2 to the Martin Marietta Materials, Inc.
                           Current Report on Form 8-K, filed on October 25,
                           1996)

  3.02            --Restated Bylaws of the Company, as amended (incorporated by
                           reference to Exhibit 3.3 to the Martin Marietta
                           Materials, Inc. Current Report on Form 8-K, filed on
                           October 25, 1996)

  4.01            --Specimen Common Stock Certificate (incorporated by reference
                           to Exhibit 4.01 to the Martin Marietta Materials,
                           Inc. registration statement on Form S-1 (SEC
                           Registration No. 33-72648))

  4.02            --Articles 2 and 8 of the Company's Restated Articles of
                           Incorporation, as amended (incorporated by reference
                           to Exhibit 4.02 to the Martin Marietta Materials,
                           Inc. Annual Report on Form 10-K for the fiscal year
                           ended December 31, 1996)

  4.03            --Article I of the Company's Restated Bylaws, as amended
                           (incorporated by reference to Exhibit 4.03 to the
                           Martin Marietta Materials, Inc. Annual Report on Form
                           10-K for the fiscal year ended December 31, 1996)

  4.04            --Indenture dated as of December 1, 1995 between Martin
                           Marietta Materials, Inc. and First Union National
                           Bank of North Carolina (incorporated by reference to
                           Exhibit 4(a) to the Martin Marietta Materials, Inc.
                           registration statement on Form S-3 (SEC Registration
                           No. 33-99082))

  4.05            --Form of Martin Marietta Materials, Inc. 7% Debenture due
                           2025 (incorporated by reference to Exhibit 4(a)(i) to
                           the Martin Marietta Materials, Inc. registration
                           statement on Form S-3 (SEC Registration No.
                           33-99082))

  4.06            --Form of Martin Marietta Materials, Inc. 6.9% Notes due 2007
                           (incorporated by reference to Exhibit 4(a)(i) to the
                           Martin Marietta Materials, Inc. registration
                           statement on Form S-3 (SEC on Registration No.
                           33-99082))

  4.08            --Indenture dated as of December 7, 1998 between Martin
                           Marietta Materials, Inc. and First Union National
                           Bank (incorporated by reference to Exhibit 4.08 to
                           the Martin Marietta Materials, Inc. registration
                           statement on Form S-4 (SEC Registration No.
                           333-71793))

  4.09            --Form of Martin Marietta Materials, Inc. 5.875% Note due
                           December 1, 2008 (incorporated by reference to
                           Exhibit 4.09 to the Martin Marietta Materials, Inc.
                           registration statement on Form S-4 (SEC Registration
                           No. 333-71793))


                                       21
<PAGE>   22

Exhibit
   No.
- -------

 10.03            --Tax Assurance Agreement dated as of September 13, 1996
                           between the Company and Lockheed Martin Corporation
                           (incorporated by reference to Exhibit 10.10 to the
                           Martin Marietta Materials, Inc. Form 10-Q for the
                           quarter ended September 30, 1996)

 10.04            --Supplemental Tax Sharing Agreement dated as of September 13,
                           1996 between the Company and Lockheed Martin
                           Corporation (incorporated by reference to Exhibit
                           10.09 to the Martin Marietta Materials, Inc. Form
                           10-Q for the quarter ended September 30, 1996)

 10.05            --Rights Agreement, dated as of October 21, 1996, between the
                           Company and First Union National Bank of North
                           Carolina, as Rights Agent, which includes the Form of
                           Articles of Amendment With Respect to the Junior
                           Participating Class A Preferred Stock of Martin
                           Marietta Materials, Inc., as Exhibit A, the Form of
                           Rights Certificate, as Exhibit B, and the Summary of
                           Rights to Purchase Preferred Stock, as Exhibit C
                           (incorporated by reference to Exhibit 1 to the Martin
                           Marietta Materials, Inc. registration statement on
                           Form 8-A, filed with the Securities and Exchange
                           Commission on October 21, 1996)

 10.06            --Revolving Credit Agreement dated as of January 29, 1997
                           among the Company and Morgan Guaranty Trust Company
                           of New York, as Agent Bank (incorporated by reference
                           to Exhibit 10.06 to the Martin Marietta Materials,
                           Inc. Annual Report on Form 10-K for the fiscal year
                           ended December 31, 1996)

*10.07            --Martin Marietta Materials, Inc. Amended and Restated
                           Shareholder Value Achievement Plan

*10.08            --Form of Martin Marietta Materials, Inc. Amended and Restated
                           Employment Protection Agreement**

 10.09            --Amended and Restated Martin Marietta Materials, Inc. Common
                           Stock Purchase Plan for Directors** (incorporated by
                           reference to Exhibit 10.10 to the Martin Marietta
                           Materials, Inc. Annual Report on Form 10-K for the
                           fiscal year ended December 31, 1996)

 10.10            --Martin Marietta Materials, Inc. Executive Incentive Plan, as
                           amended (incorporated by reference to Exhibit 10.18
                           to the Martin Marietta Materials, Inc. Annual Report
                           on Form 10-K for the fiscal year ended December 31,
                           1995)**

 10.11            --Martin Marietta Materials, Inc. Incentive Stock Plan
                           (incorporated by reference to Exhibit 10.01 to the
                           Martin Marietta Materials, Inc. Form 10-Q for the
                           quarter ended June 30, 1995)**

 10.12            --Amendment No. 1 to the Martin Marietta Materials, Inc.
                           Incentive Stock Plan (incorporated by reference to
                           Exhibit 10.01 to the Martin Marietta Materials, Inc.
                           Form 10-Q for the quarter ended September 30, 1997)**

*10.13            --Amendment No. 2 to the Martin Marietta Materials, Inc.
                           Incentive Stock Plan**



- ------------------
 *Filed herewith
**Management contract or compensatory plan or arrangement required to be filed
  as an exhibit pursuant to Item 14(c) of Form 10-K



                                       22
<PAGE>   23

Exhibit
   No.
- -------

10.14             --Martin Marietta Materials, Inc. Amended and Restated
                           Stock-Based Award Plan (incorporated by reference to
                           Exhibit 10.01 to the Martin Marietta Materials, Inc.
                           Form 10-Q for the quarter ended March 31, 1998)**

10.15             --Martin Marietta Materials, Inc. Amended and Restated Omnibus
                           Securities Award Plan (incorporated by reference to
                           Exhibit 10.02 to the Martin Marietta Materials, Inc.
                           Form 10-Q for the quarter ended March 31, 1998)**

*10.16            --Martin Marietta Materials, Inc. Supplemental Excess
                           Retirement Plan**

*10.17            --Amended and Restated Revolving Credit Agreement dated as of
                           August 11, 1999 among Martin Marietta Materials, Inc.
                           and Morgan Guaranty Trust Company of New York, as
                           agent bank

*12.01            --Computation of ratio of earnings to fixed charges for the
                           year ended December 31, 1999

*13.01            --Martin Marietta Materials, Inc. 1999 Annual Report to
                           Shareholders, portions of which are incorporated by
                           reference in this Form 10-K. Those portions of the
                           1999 Annual Report to Shareholders that are not
                           incorporated by reference shall not be deemed to be
                           "filed" as part of this report

*21.01            --List of subsidiaries of Martin Marietta Materials, Inc.

*23.01            --Consent of Ernst & Young LLP, Independent Auditors for
                           Martin Marietta Materials, Inc. and consolidated
                           subsidiaries

*24.01            --Powers of Attorney (included in this Form 10-K at page 25)

*27.01            --Financial Data Schedule (for Securities and Exchange
                           Commission use only)


Other material incorporated by reference:
         Martin Marietta Materials, Inc.'s 2000 Proxy Statement filed pursuant
         to Regulation 14A, portions of which are incorporated by reference in
         this Form 10-K. Those portions of the 2000 Proxy Statement which are
         not incorporated by reference shall not be deemed to be "filed" as part
         of this report.


- ------------------
  *Filed herewith
 **Management contract or compensatory plan or arrangement required to be filed
   as an exhibit pursuant to Item 14(c) of Form 10-K



                                       23
<PAGE>   24

                          FINANCIAL STATEMENT SCHEDULE

                SCHEDULE II -- VALUATION AND QUALIFYING ACCOUNTS
          MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES


<TABLE>
<CAPTION>
                   COL A                          COL B                 COL C                COL D          COL E
                   -----                          -----                 -----                -----          -----

                                                                     ADDITIONS
                                                              -----------------------
                                                                 (1)           (2)
                                                               CHARGED     CHARGED TO
                                               BALANCE AT     TO COSTS        OTHER                       BALANCE AT
                                               BEGINNING        AND        ACCOUNTS--     DEDUCTIONS--      END OF
                DESCRIPTION                    OF PERIOD      EXPENSES      DESCRIBE        DESCRIBE        PERIOD
                -----------                    ----------     --------     ----------     ------------    -----------
                                                                  (AMOUNTS IN THOUSANDS)
<S>                                             <C>          <C>          <C>              <C>             <C>

YEAR ENDED DECEMBER 31, 1999

Allowance for doubtful accounts                 $ 4,430      $   312         ------        $   35(a)       $ 4,707
Inventory valuation allowance                     8,449          360         ------         2,064(a)         6,745
Amortization of intangible assets                42,511       20,290         ------         3,342(b)        58,354
                                                                                              673(c)
                                                                                              432(d)


YEAR ENDED DECEMBER 31, 1998

Allowance for doubtful accounts                 $ 4,789      $    35      $  500(c)        $  894(a)       $ 4,430
Inventory valuation allowance                     7,171        1,278         ------            -----         8,449
Amortization of intangible assets                29,464       12,163       1,866(c)           338(b)        42,511
                                                                                              644(e)


YEAR ENDED DECEMBER 31, 1997

Allowance for doubtful accounts                 $ 2,950      $   411      $1,733(c)        $  305(a)       $ 4,789
Inventory valuation allowance                     6,078          556         537(c)             ----         7,171
Amortization of intangible assets                22,044        7,964           ----           325(b)        29,464
                                                                                              219(e)
</TABLE>


(a)  To adjust allowance for change in estimates.
(b)  Fully-amortized intangible assets written off.
(c)  Purchase accounting adjustments.
(d)  Sale of assets.
(e)  Revaluation adjustments.



                                       24
<PAGE>   25

                                   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.


                                        MARTIN MARIETTA MATERIALS, INC.



                                        By:   /s/ Bruce A. Deerson
                                           -------------------------------------
                                              Bruce A. Deerson
                                              Vice President and General Counsel






                                POWER OF ATTORNEY

         KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below appoints Bruce A. Deerson and Roselyn R. Bar, jointly and
severally, as his true and lawful attorney-in-fact, each with full power of
substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, to sign any and all amendments to this Annual Report on
Form 10-K, and to file the same, with all exhibits thereto, and other documents
in connection therewith, with the Securities and Exchange Commission, granting
unto said attorneys-in-fact, jointly and severally, full power and authority to
do and perform each in connection therewith, as fully to all intents and
purposes as he might or could do in person, hereby ratifying and confirming all
that said attorneys-in-fact, jointly and severally, or their or his or her
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.


Dated:  March 24, 2000



                                       25
<PAGE>   26

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


<TABLE>
<CAPTION>
                Signature                                Title                      Date
                ---------                                -----                      ----
<S>                                         <C>                                           <C>


/s/ Stephen P. Zelnak, Jr.                  Chairman of the Board,              March 24, 2000
- ----------------------------------------    President and Chief Executive
Stephen P. Zelnak, Jr.                      Officer


/s/ Janice K. Henry                         Senior Vice President, Chief        March 24, 2000
- ----------------------------------------    Financial Officer and Treasurer
Janice K. Henry


/s/ Anne H. Lloyd                           Chief Accounting Officer            March 24, 2000
- ----------------------------------------
Anne H. Lloyd

/s/ Richard G. Adamson                      Director                            March 24, 2000
- ----------------------------------------
Richard G. Adamson

/s/ Marcus C. Bennett                       Director                            March 24, 2000
- ----------------------------------------
Marcus C. Bennett

/s/ Bobby F. Leonard                        Director                            March 24, 2000
- ----------------------------------------
Bobby F. Leonard

/s/ William E. McDonald                     Director                            March 24, 2000
- ----------------------------------------
William E. McDonald

/s/ Frank H. Menaker, Jr.                   Director                            March 24, 2000
- ----------------------------------------
Frank H. Menaker, Jr.

/s/ James M. Reed                           Director                            March 24, 2000
- ----------------------------------------
James M. Reed

/s/ William B. Sansom                       Director                            March 24, 2000
- ----------------------------------------
William B. Sansom

/s/ Richard A. Vinroot                      Director                            March 24, 2000
- ----------------------------------------
Richard A. Vinroot
</TABLE>



                                       26
<PAGE>   27

                                    EXHIBITS

Exhibit
   No.
- -------

  3.01            --Restated Articles of Incorporation of the Company, as
                           amended (incorporated by reference to Exhibits 3.1
                           and 3.2 to the Martin Marietta Materials, Inc.
                           Current Report on Form 8-K, filed on October 25,
                           1996)

  3.02            --Restated Bylaws of the Company, as amended (incorporated by
                           reference to Exhibit 3.3 to the Martin Marietta
                           Materials, Inc. Current Report on Form 8-K, filed on
                           October 25, 1996)

  4.01            --Specimen Common Stock Certificate (incorporated by reference
                           to Exhibit 4.01 to the Martin Marietta Materials,
                           Inc. registration statement on Form S-1 (SEC
                           Registration No. 33-72648))

  4.02            --Articles 2 and 8 of the Company's Restated Articles of
                           Incorporation, as amended (incorporated by reference
                           to Exhibit 4.02 to the Martin Marietta Materials,
                           Inc. Annual Report on Form 10-K for the fiscal year
                           ended December 31, 1996)

  4.03            --Article I of the Company's Restated Bylaws, as amended
                           (incorporated by reference to Exhibit 4.03 to the
                           Martin Marietta Materials, Inc. Annual Report on Form
                           10-K for the fiscal year ended December 31, 1996)

  4.04            --Indenture dated as of December 1, 1995 between Martin
                           Marietta Materials, Inc. and First Union National
                           Bank of North Carolina (incorporated by reference to
                           Exhibit 4(a) to the Martin Marietta Materials, Inc.
                           registration statement on Form S-3 (SEC Registration
                           No. 33-99082))

  4.05            --Form of Martin Marietta Materials, Inc. 7% Debenture due
                           2025 (incorporated by reference to Exhibit 4(a)(i) to
                           the Martin Marietta Materials, Inc. registration
                           statement on Form S-3 (SEC Registration No.
                           33-99082))

  4.06            --Form of Martin Marietta Materials, Inc. 6.9% Notes due 2007
                           (incorporated by reference to Exhibit 4(a)(i) to the
                           Martin Marietta Materials, Inc. registration
                           statement on Form S-3 (SEC on Registration No.
                           33-99082))

  4.08            --Indenture dated as of December 7, 1998 between Martin
                           Marietta Materials, Inc. and First Union National
                           Bank (incorporated by reference to Exhibit 4.08 to
                           the Martin Marietta Materials, Inc. registration
                           statement on Form S-4 (SEC Registration No.
                           333-71793))

  4.09            --Form of Martin Marietta Materials, Inc. 5.875% Note due
                           December 1, 2008 (incorporated by reference to
                           Exhibit 4.09 to the Martin Marietta Materials, Inc.
                           registration statement on Form S-4 (SEC Registration
                           No. 333-71793))



                                       27
<PAGE>   28

Exhibit
   No.
- -------

 10.03            --Tax Assurance Agreement dated as of September 13, 1996
                           between the Company and Lockheed Martin Corporation
                           (incorporated by reference to Exhibit 10.10 to the
                           Martin Marietta Materials, Inc. Form 10-Q for the
                           quarter ended September 30, 1996)

 10.04            --Supplemental Tax Sharing Agreement dated as of September 13,
                           1996 between the Company and Lockheed Martin
                           Corporation (incorporated by reference to Exhibit
                           10.09 to the Martin Marietta Materials, Inc. Form
                           10-Q for the quarter ended September 30, 1996)

 10.05            --Rights Agreement, dated as of October 21, 1996, between the
                           Company and First Union National Bank of North
                           Carolina, as Rights Agent, which includes the Form of
                           Articles of Amendment With Respect to the Junior
                           Participating Class A Preferred Stock of Martin
                           Marietta Materials, Inc., as Exhibit A, the Form of
                           Rights Certificate, as Exhibit B, and the Summary of
                           Rights to Purchase Preferred Stock, as Exhibit C
                           (incorporated by reference to Exhibit 1 to the Martin
                           Marietta Materials, Inc. registration statement on
                           Form 8-A, filed with the Securities and Exchange
                           Commission on October 21, 1996)

 10.06            --Revolving Credit Agreement dated as of January 29, 1997
                           among the Company and Morgan Guaranty Trust Company
                           of New York, as Agent Bank (incorporated by reference
                           to Exhibit 10.06 to the Martin Marietta Materials,
                           Inc. Annual Report on Form 10-K for the fiscal year
                           ended December 31, 1996)

*10.07            --Martin Marietta Materials, Inc. Amended and Restated
                           Shareholder Value Achievement Plan

*10.08            --Form of Martin Marietta Materials, Inc. Amended and Restated
                           Employment Protection Agreement**

 10.09            --Amended and Restated Martin Marietta Materials, Inc. Common
                           Stock Purchase Plan for Directors** (incorporated by
                           reference to Exhibit 10.10 to the Martin Marietta
                           Materials, Inc. Annual Report on Form 10-K for the
                           fiscal year ended December 31, 1996)

 10.10            --Martin Marietta Materials, Inc. Executive Incentive Plan, as
                           amended (incorporated by reference to Exhibit 10.18
                           to the Martin Marietta Materials, Inc. Annual Report
                           on Form 10-K for the fiscal year ended December 31,
                           1995)**

 10.11            --Martin Marietta Materials, Inc. Incentive Stock Plan
                           (incorporated by reference to Exhibit 10.01 to the
                           Martin Marietta Materials, Inc. Form 10-Q for the
                           quarter ended June 30, 1995)**

 10.12            --Amendment No. 1 to the Martin Marietta Materials, Inc.
                           Incentive Stock Plan (incorporated by reference to
                           Exhibit 10.01 to the Martin Marietta Materials, Inc.
                           Form 10-Q for the quarter ended September 30, 1997)**

*10.13            --Amendment No. 2 to the Martin Marietta Materials, Inc.
                           Incentive Stock Plan**



- ------------------
 *Filed herewith
**Management contract or compensatory plan or arrangement required to be filed
  as an exhibit pursuant to Item 14(c) of Form 10-K




                                       28
<PAGE>   29

Exhibit
   No.
- -------

10.14             --Martin Marietta Materials, Inc. Amended and Restated
                           Stock-Based Award Plan (incorporated by reference to
                           Exhibit 10.01 to the Martin Marietta Materials, Inc.
                           Form 10-Q for the quarter ended March 31, 1998)**

10.15             --Martin Marietta Materials, Inc. Amended and Restated Omnibus
                           Securities Award Plan (incorporated by reference to
                           Exhibit 10.02 to the Martin Marietta Materials, Inc.
                           Form 10-Q for the quarter ended March 31, 1998)**

*10.16            --Martin Marietta Materials, Inc. Supplemental Excess
                           Retirement Plan**

*10.17            --Amended and Restated Revolving Credit Agreement dated as of
                           August 11, 1999 among Martin Marietta Materials, Inc.
                           and Morgan Guaranty Trust Company of New York, as
                           agent bank

*12.01            --Computation of ratio of earnings to fixed charges for the
                           year ended December 31, 1999

*13.01            --Martin Marietta Materials, Inc. 1999 Annual Report to
                           Shareholders, portions of which are incorporated by
                           reference in this Form 10-K. Those portions of the
                           1999 Annual Report to Shareholders that are not
                           incorporated by reference shall not be deemed to be
                           "filed" as part of this report

*21.01            --List of subsidiaries of Martin Marietta Materials, Inc.

*23.01            --Consent of Ernst & Young LLP, Independent Auditors for
                           Martin Marietta Materials, Inc. and consolidated
                           subsidiaries

*24.01            --Powers of Attorney (included in this Form 10-K at page 25)

*27.01            --Financial Data Schedule (for Securities and Exchange
                           Commission use only)


Other material incorporated by reference:
         Martin Marietta Materials, Inc.'s 2000 Proxy Statement filed pursuant
         to Regulation 14A, portions of which are incorporated by reference in
         this Form 10-K. Those portions of the 2000 Proxy Statement which are
         not incorporated by reference shall not be deemed to be "filed" as part
         of this report.


- ------------------
  *Filed herewith
 **Management contract or compensatory plan or arrangement required to be filed
   as an exhibit pursuant to Item 14(c) of Form 10-K



                                       29

<PAGE>   1
                                                                   EXHIBIT 10.07

                              AMENDED AND RESTATED
                         MARTIN MARIETTA MATERIALS, INC.
                       SHAREHOLDER VALUE ACHIEVEMENT PLAN

INTRODUCTION

         Amended and Restated Martin Marietta Materials, Inc. Shareholder Value
Achievement Plan (the "Plan") is designed to foster and promote the long-term
growth and performance of the Company by enhancing the Company's ability to
attract and retain qualified key employees and motivating key employees through
stock ownership and performance-based incentives, and to more closely align the
goals of such employees with that of the Company's shareholders. To achieve this
purpose, this Plan provides authority for the grant of performance-based stock
awards.

ARTICLE 1 - DEFINITIONS

         1.1 "Acquiring Person" shall have the meaning ascribed to it in Section
1.6.

         1.2 "Award" shall mean a performance-based stock award granted to a
Participant pursuant to Article 5.

         1.3 "Award Agreement" shall mean the agreement between the Company and
a Participant that sets forth terms, conditions, and restrictions applicable to
an Award.

         1.4 "Board of Directors" shall mean the Board of Directors of the
Company.

         1.5 "Cause" shall mean the Participant's having been convicted in a
court of competent jurisdiction of a felony or having been adjudged by a court
of competent jurisdiction to be liable for fraudulent or dishonest conduct, or
gross abuse of authority or discretion, with respect to the Company, and such
conviction or adjudication has become final and non-appealable.

         1.6 "Change of Control" shall mean, on or after the effective date of
the Plan, (a) The acquisition by any individual, entity or group (within the
meaning of Section 13(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934,
as amended (the "Exchange Act")) (an "Acquiring Person") of beneficial ownership
(within the meaning of Rule 13d-3 promulgated under the Exchange Act) of 40% or
more of either (i) the fully diluted shares of common stock of the Company, as
reflected on the Company's financial statements (the "Outstanding Company Common
Stock"), or (ii) the combined voting power of the then outstanding voting
securities of the Company entitled to vote generally in the election of
directors (the "Outstanding Company Voting Securities"); provided, however, that
for purposes of this subsection (a), the following acquisitions shall not
constitute a Change of Control: (A) any acquisition by the Company or any
"affiliate" of the Company, within the meaning of 17 C.F.R. ss. 230.405 (an
"Affiliate"), (B) any acquisition by any employee benefit plan (or related
trust) sponsored or maintained by the



<PAGE>   2

Company or any Affiliate of the Company or (C) any acquisition by any entity
pursuant to a transaction which complies with clauses (i), (ii) and (iii) of
subsection (c) of this definition; or

         (b) Individuals who constitute the Incumbent Board cease for any reason
to constitute at least a majority of the Board; or

         (c) Consummation of a reorganization, merger or consolidation or sale
or other disposition of all or substantially all of the assets of the Company (a
"Business Combination"), in each case, unless, following such Business
Combination, (i) all or substantially all of the individuals and entities who
were the beneficial owners, respectively, of the Outstanding Company Common
Stock and Outstanding Company Voting Securities immediately prior to such
Business Combination beneficially own, directly or indirectly, more than 50% of,
respectively, the then outstanding shares of common stock and the combined
voting power of the then outstanding voting securities entitled to vote
generally in the election of directors, as the case may be, of the corporation
resulting from such Business Combination (including, without limitation, a
corporation which as a result of such transaction owns the Company or all or
substantially all of the Company's assets either directly or through one or more
subsidiaries) in substantially the same proportions as their ownership,
immediately prior to such Business Combination, of the Outstanding Company
Common Stock and Outstanding Company Voting Securities, as the case may be, and
(ii) no Person (excluding any employee benefit plan (or related trust) sponsored
or maintained by the Company or any Affiliate of the Company, or such
corporation resulting from such Business Combination or any Affiliate of such
corporation) beneficially owns, directly or indirectly, 40% or more of,
respectively, the fully diluted shares of common stock of the corporation
resulting from such Business Combination, as reflected on such corporation's
financial statements, or the combined voting power of the then outstanding
voting securities of such corporation except to the extent that such ownership
existed prior to the Business Combination and (iii) at least a majority of the
members of the board of directors of the corporation resulting from such
Business Combination were members of the Incumbent Board at the time of the
execution of the initial agreement, or of the action of the Board, providing for
such Business Combination; or

         (d) Approval by the shareholders of the Company of a complete
liquidation or dissolution of the Company.

         1.7 "Code" shall mean the Internal Revenue Code of 1986, or any law
that supersedes or replaces it, as amended from time to time.

         1.8 "Committee" shall mean the Compensation Committee of the Board of
Directors, or any other committee of the Board of Directors that the Board of
Directors authorizes to administer this Plan. The Committee will be constituted
in a manner intended to cause Awards to be exempt from the application of
Section 16(b) of the Exchange Act pursuant to Rule 16b-3, and to be qualified as
"qualified performance-based compensation" for purposes of Section 162(m).

         1.9 "Common Stock " shall mean the common stock of the Company, $0.01
par value per share, including authorized and unissued shares.



                                       2
<PAGE>   3

         1.10 "Company" shall mean Martin Marietta Materials, Inc., a North
Carolina corporation.

         1.11 "Disability" shall mean a medically determined physical or mental
impairment which qualifies the Participant for benefits under the Company's
long-term disability program. A Participant shall not be deemed to have incurred
a Disability until such benefits actually become payable (i.e., after any
applicable waiting period). If the Company does not maintain a long-term
disability program, or if a Participant does not elect coverage under such
program, Disability shall mean the incapacity of the Participant such that he is
unable to perform his duties to the Company for a period of 150 out of 180
consecutive days, as determined in the reasonable judgment of the Committee.

         1.12 "Exchange Act" shall mean the Securities Exchange Act of 1934, as
amended, or any law that supersedes or replaces it, as the same may be amended
from time to time.

         1.13 "Fair Market Value" shall mean the closing price of a share of
Common Stock on the relevant date or, if no sale was made on such date, then on
the next preceding day on which such a sale was made (a) if the Common Stock is
listed on the New York Stock Exchange ("NYSE"), as reported in the Wall Street
Journal or (b) if the Common Stock is not listed on the NYSE but is listed on
the NASDAQ National Market System, then as reported on such system, or (c) if
the Common Stock not listed on either the NYSE or the NASDAQ National Market
System, as determined by the Board of Directors or Committee.

         1.14 "Fiscal Year" shall mean the fiscal year of the Company.

         1.15 "Incumbent Board" shall mean a member of the Board of Directors of
the Company who is not an Acquiring Person, or an affiliate (as defined in Rule
12b-2 of the Exchange Act) or an associate (as defined in Rule 12b-2 of the
Exchange Act) of an Acquiring Person, or a representative or nominee of an
Acquiring Person.

         1.16 "Measurement Period" shall mean a period of three consecutive
Fiscal Years or any other period selected and established by the Committee at
the time the corresponding Awards are granted.

         1.17 "Participant" shall mean any employee of the Company who has
received an Award in accordance with Article 2 which Award has neither been
fully paid out nor expired.

         1.18 "Retirement" shall mean Participant's termination of employment
with the Company (a) at a time at which the Participant is entitled to
immediately commence receipt of benefits from the Company's qualified defined
benefit retirement plan or (b) if the Company does not maintain such a plan at
the time, either (i) at or after age 55 if employed by the Company or an
"Affiliate" (as defined in Rule 12b-2 of the Exchange Act) for at least five
years or (ii) at or after age 65.



                                       3
<PAGE>   4

         1.19 "Rule 16b-3" shall mean Rule 16b-3 promulgated under the Exchange
Act as the same may be amended, modified superseded or replaced from time to
time.

         1.20 "Section 162(m)" shall mean Section 162(m) of the Code, together
with any and all regulations promulgated by the Internal Revenue Service
thereunder, as the same may be amended, modified, superseded or replaced from
time to time.

ARTICLE 2 - ELIGIBILITY

         All key employees of the Company and any of its direct or indirect
subsidiaries, including officers whether or not members of the Board of
Directors, are eligible for the grant of Awards. The selection of key employees
to receive Awards will be within the discretion of the Committee.

ARTICLE 3 - COMMON STOCK AVAILABLE FOR AWARDS; ADJUSTMENT

         3.1 Number of Shares of Common Stock. Subject to adjustment as provided
for in Section 3.3, the aggregate number of shares of Common Stock that may be
subject to Awards granted under this Plan shall be 250,000 shares of Common
Stock. The assumption of awards granted by an organization acquired by the
Company, or the grant of Awards under this Plan in substitution of any such
awards, will not reduce the number of shares of Common Stock available for the
grant of Awards under this Plan.

         Common Stock subject to an Award that expires or is forfeited,
terminated, or canceled will again be available for grant under this Plan,
without reducing the number of shares of Common Stock available for grant of
Awards under this Plan.

         3.2 No Fractional Shares. No fractional shares of Common Stock will be
issued under the Plan, and the Committee will round the number of shares to
which a Participant is entitled down to the nearest whole share.

         3.3 Adjustment. The aggregate number of shares of Common Stock which
may be issued pursuant to Awards granted hereunder, the number of shares of
Common Stock covered by each outstanding Award and the price per share thereof
shall be appropriately adjusted for any increase or decrease in the number of
outstanding shares of Common Stock resulting from a stock split or other
subdivision or consolidation of shares of Common Stock or for other capital
adjustments or payments of stock dividends or distributions or other increases
or decreases in the outstanding shares of Common Stock without receipt of
consideration by the Company.

                  In the event of any change in the outstanding shares of Common
Stock by reason of any recapitalization, merger, consolidation, spin-off,
combination or exchange of shares or other corporate change, or any
distributions to common shareholders other than cash dividends, the Committee
shall make such substitution or adjustment, if any, as it deems to be equitable,
as to the number or kind of shares of Common Stock or other securities issued or
reserved for issuance pursuant to the Plan, and the number or kind of shares of
Common Stock or other securities covered by outstanding Awards, and the price
thereof. In instances where another corporation or



                                       4
<PAGE>   5

other business entity is being acquired by the Company, and the Company has
assumed outstanding employee award grants and/or the obligation to make future
or potential grants under a prior existing plan of the acquired entity, similar
adjustments are permitted at the discretion of the Committee. The adjustments
provided for in this Section 3.3, and the manner of their application, shall be
determined by the Committee in its sole discretion.

ARTICLE 4 - ADMINISTRATION

         4.1 Committee. This Plan will be administered by the Committee. The
Committee will, subject to the terms of this Plan, have the authority to (a)
select the eligible employees who will receive Awards, (b) grant Awards, (c)
determine the number of Awards to be granted to Participants, (d) determine the
terms, conditions, and restrictions applicable to Awards (including the
establishment of Performance Goals pursuant to Section 5.3), (e) adopt, alter,
and repeal administrative rules and practices governing this Plan, (f) interpret
the terms and provisions of this Plan and any Awards granted under this Plan,
(g) prescribe the forms of any Award Agreement, or other instruments relating to
Awards, and (h) otherwise supervise the administration of this Plan and exercise
such rights and responsibilities as are delegated to it thereunder. All
decisions by the Committee will be made with the approval of not less than a
majority of its members.

         4.2 Delegation. The Committee may delegate any of its authority to any
other person or persons that it deems appropriate, provided the delegation does
not cause this Plan or any Awards granted under this Plan to fail to qualify for
the exemption provided by Rule 16b-3 or Section 162(m).

         4.3 Decisions Final. All decisions by the Committee, and by any other
person or persons to whom the Committee has delegated authority, will be final
and binding on all persons.

ARTICLE 5 - AWARDS

         5.1 General. The Committee may, in its discretion, grant to
Participants Awards valued by reference to shares of Common Stock that are
wholly contingent on the attainment of performance goals established by the
Committee in accordance with the terms of this Plan.

         5.2 Grant of Awards. (a) Awards shall be granted to Participants as of
the beginning of a Measurement Period. The payment with respect to the Awards
shall be conditioned on the satisfaction of the performance goals described in
Section 5.3 at the end of the applicable Measurement Period. Once established,
the Committee shall not have discretion to modify the terms of the Awards except
with respect to any discretion specifically granted to the Committee under this
Plan. It is intended that all payments hereunder to Participants will satisfy
the requirements for the exemption under Section 162(m) and related regulations
for "qualified performance-based compensation."

         (b) Not later than 90 days after the beginning of the Measurement
Period (or, if earlier, the date on which 25% of the Measurement Period has
elapsed), the Committee shall grant a specified number of Awards to each
Participant with respect to that Measurement Period.



                                       5
<PAGE>   6

No Participant may be granted an Award that has a target amount that is in
excess of the lesser of (i) an aggregate of 20,000 shares of Common Stock or
(ii) a dollar value of $500,000 based on the Fair Market Value of the target
number of shares of Common Stock subject thereto on the first day of the
applicable Measurement Period.

         (c) At the end of the Measurement Period, the Committee shall determine
the percentage, if any, of the Awards granted to the Participant for that
Measurement Period that are earned by the Participant. That percentage shall be
based on the degree to which the performance goals for that Measurement Period
are satisfied. The formula for determining the correlation between the
percentage of the Awards earned and the level of performance for a Measurement
Period shall be established in writing by the Committee at the time the
performance goals are determined. Prior to the payment of any Awards, the
Committee must certify in writing the degree of attainment of the applicable
performance goals.

         5.3 Performance Goals. Performance goals used to compute Awards shall
be adopted by the Committee in writing prior to the grant of any Awards to which
such performance goals apply. The performance goals shall be based on one or
more of the following performance measures: (a) total return to shareholders,
(b) cash flow, (c) return on equity, (d) return on assets, (e) stock price, and
(f) earnings per share. Any such performance goals and the applicable
performance measures will be reflected in each Award Agreement to which such
goals and measures relate. The number of Awards that will be paid out to any
Participant for the applicable Measurement Period will depend on the extent to
which the Company attains the established performance goals, as established
pursuant to Section 5.2(c).

         5.4 Nonforfeitability of the Award. (a) General. Except as provided in
Section 5.4(b) and (c) and Article 6, a Participant must remain employed by the
Company until the end of a Measurement Period to receive payment with respect to
any Award.

         (b) Death or Disability. Subject to Section 5.4(d), if during a
Measurement Period a Participant terminates employment on account of death or
Disability, (together, a "Qualifying Termination"), such Participant (or in the
case of death, his estate) shall be entitled to a prorated payment with respect
to Awards held by the Participant with respect to that Measurement Period, as
described in the next sentence. The Participant shall be entitled to payment
with respect to a percentage of such Awards as set forth below based on the
Fiscal Year during the Measurement Period in which his Qualifying Termination
occurs:

                           FISCAL YEAR           PERCENTAGE
                           -----------           ----------
                               1st                  0%
                               2nd                  33-1/3%
                               3rd                  66-2/3%

For purposes of determining the payment with respect to a Participant's Awards
under this Section 5.4(b), it shall be assumed that the Company has achieved the
target level of performance it established for the Measurement Period. If the
Measurement Period is other than three Fiscal Years, then the Committee shall
make appropriate adjustments to the above schedule in its sole discretion.



                                       6
<PAGE>   7

Payment with respect to Awards under this Section 5.4(b), if any, will be made
as soon as practicable after the Participant's Qualifying Termination occurs.

         (c) Retirement and Certain Terminations. Subject to Section 5.4(d), if
a Participant holding Awards terminates employment on account of Retirement, or
is involuntarily terminated by the Company without Cause before the end of the
applicable Measurement Period, the Participant shall be entitled to payment with
respect to such Awards at the end of such Measurement Period as if he had
remained employed until that time.

         (d) Committee Negative Discretion. The Committee may, in its sole
discretion, decide to reduce or eliminate any amount otherwise payable with
respect to an Award under Section 5.4(b) or (c).

         5.5 Payment of the Award. A Participant's Award shall be paid as soon
as practicable after the end of the Measurement Period (or, in the case of a
Participant who dies or incurs a Disability and becomes entitled to payment with
respect to an Award pursuant to Section 5.4(b), as soon as practicable following
death or the determination of Disability). Payment shall be made in shares of
Common Stock or, in the discretion of the Committee, all or in part cash, based
on the Fair Market Value of the applicable number of shares of Common Stock on
the payment date.

ARTICLE 6 - CHANGE OF CONTROL

         6.1 Effect of Change of Control. Notwithstanding any provision of this
Plan to the contrary, in the event that a Change of Control occurs, all
conditions applicable to outstanding Awards will be deemed to have been
satisfied at the target level as of the date of the Change of Control. Payment
with respect to such Awards shall be made as soon as practicable after the
Change of Control in accordance with the last sentence of Section 5.5.

ARTICLE 7 - GENERAL

         7.1 Nonassignability of Awards. No right or interest of a Participant
under the Plan shall be subject in any manner to anticipation, alienation, sale,
assignment, transfer, encumbrance, pledge, attachment, garnishment by creditors
of the Participant or his successors, or shall be transferable by a Participant
otherwise than by will or the laws of intestate succession. Any attempt to take
an action with respect to an Award which is prohibited by the preceding sentence
shall render such Award null and void.

         7.2 No Right or Obligation of Continued Employment. Nothing contained
in this Plan shall require the Company or a related company to continue to
employ a Participant, nor shall the Participant be required to remain in the
employment of the Company or a related company.



                                       7
<PAGE>   8

         7.3 Withholding. The Company shall withhold all required local, state
and federal taxes from any amount payable in respect of an Award, including
withholding of shares of Common Stock otherwise payable pursuant to the Plan.

         7.4 Effective Date. The Plan was effective as of October 16, 1996. This
Amendment and Restatement shall be effective as of March 21, 2000 and, in
accordance with Section 7.5, will apply to Awards previously granted with
Measurement Periods ending after January 1, 2000.

         7.5 Amendment and Termination of the Plan. The Plan may be amended or
terminated at any time by the Board of Directors or by the Committee as
delegated by the Board of Directors, provided that such termination or amendment
shall not, without the consent of the Participant, adversely affect such
Participant's rights with respect to Awards previously awarded to him.
Shareholder approval for any amendment is required to the extent necessary to
preserve the exemption for "qualified performance-based compensation" under
Section 162(m). With the consent of the Participant affected, the Board of
Directors, or by delegation of authority by the Board of Directors, the
Committee, may amend outstanding Award Agreements in a manner not inconsistent
with the Plan.

         7.6 Binding on Successors. The obligations of the Company under the
Plan shall be binding upon any organization which shall succeed to all or
substantially all of the assets of the Company, or into which the Company may
merge, and the term "Company," whenever used in the Plan, shall mean and include
any such organization after the succession.

         7.7 References. Any masculine personal pronoun shall be considered to
mean also the corresponding feminine or neuter personal pronoun, as the context
requires.

         7.8 Applicable Law. The Plan shall be governed by and construed in
accordance with the laws of the State of North Carolina.




                                      [END]


                                       8

<PAGE>   1
                                                                   EXHIBIT 10.08

                              AMENDED AND RESTATED
                         EMPLOYMENT PROTECTION AGREEMENT


                  THIS AGREEMENT, between Martin Marietta Materials, Inc., a
North Carolina corporation (the "Company"), and ___________ (the "Employee"),
dated as of this 11th day of November, 1999 (the "Effective Date")


                              W I T N E S S E T H :

                  WHEREAS, Employee is a valuable member of management of the
Company and the Company desires to ensure the continuity of its senior
management; and

                  WHEREAS, it is the determination of the Company that
management continuity is most likely to occur if senior management is
financially protected against involuntary termination following a "Change of
Control" (as defined below) of the Company; and

                  WHEREAS, the Company and the Employee entered into an
Employment Protection Agreement dated as of ________, 19__ (the "Prior
Agreement") to provide the Employee with payments and benefits upon certain
terminations of the Employee's employment with the Company in connection with a
Change of Control, in consideration of the Employee's continued service to the
Company (which the parties hereto agree constitutes adequate consideration to
support to the Company's obligations under this Agreement); and

                  WHEREAS, the Company and the employee desire to more clearly
reflect their intention with respect to certain provisions in the Prior
Agreement, as set forth in this Agreement;

                  NOW, THEREFORE, in consideration of the premises and mutual
covenants herein contained, and for other good and valuable consideration, the
receipt and sufficiency of which are acknowledged, it is hereby agreed by and
between the Company and the Employee, each of whom intends to be legally bound,
as follows:

                  1. Definitions. For purposes of this Agreement,

                  (a) "Annual Bonus" shall mean the Employee's highest annual
bonus paid during the period beginning five years prior to a Change of Control
and ending on the date of termination of employment.

                  (b) "Base Salary" shall mean the highest annual rate of base
salary that Employee receives from the Company or its affiliates within the
twelve-month period ending on the date of a Change of Control.


<PAGE>   2

                  (c) "Board" shall mean the Board of Directors of the Company.

                  (d) "Cause" shall mean the Employee's having been convicted in
a court of competent jurisdiction of a felony or has been adjudged by a court of
competent jurisdiction to be liable for fraudulent or dishonest conduct, or
gross abuse of authority or discretion, with respect to the Company, and such
conviction or adjudication has become final and non-appealable. The Employee
shall not be deemed to have been terminated for Cause, unless the Company shall
have given the Employee (A) notice setting forth, in reasonable detail, the
facts and circumstances claimed to provide a basis for termination for Cause,
(B) a reasonable opportunity for the Employee, together with his counsel, to be
heard before the Board and (C) a notice of termination stating that, in the
reasonable judgment of the Board, the Employee was guilty of conduct
constituting Cause and specifying the particulars thereof in reasonable detail.

                  (e) "Change of Control" shall mean:

                      (i) The acquisition on or after October 18, 1996 by any
individual, entity or group (within the meaning of
Section 13(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934, as amended
(the "Exchange Act")) (an "Acquiring Person") of beneficial ownership (within
the meaning of Rule 13d-3 promulgated under the Exchange Act) of 40% or more of
either (A) the fully diluted shares of common stock of the Company, as reflected
on the Company's financial statements (the "Outstanding Company Common Stock"),
or (B) the combined voting power of the then outstanding voting securities of
the Company entitled to vote generally in the election of directors (the
"Outstanding Company Voting Securities"); provided, however, that for purposes
of this subsection (i), the following acquisitions shall not constitute a Change
of Control: (X) any acquisition by the Company or any "affiliate" of the
Company, within the meaning of 17 C.F.R. ss. 230.405 (an "Affiliate"), (Y) any
acquisition by any employee benefit plan (or related trust) sponsored or
maintained by the Company or any Affiliate of the Company or (Z) any acquisition
by any entity pursuant to a transaction which complies with clauses (A), (B) and
(C) of subsection (iii) of this definition; or

                      (ii) Individuals who constitute the Incumbent Board cease
for any reason to constitute at least a majority
of the Board; or

                      (iii) Consummation of a reorganization, merger or
consolidation or sale or other disposition of all or
substantially all of the assets of the Company (a "Business Combination"), in
each case, unless, following such Business Combination, (A) all or substantially
all of the individuals and entities who were the beneficial owners,
respectively, of the Outstanding Company Common Stock and Outstanding Company
Voting Securities immediately prior to such Business Combination beneficially
own, directly or indirectly, more than 50% of, respectively, the then
outstanding shares of common stock and the combined voting power of the then
outstanding voting securities entitled to vote generally in the election of
directors, as the case may be, of the corporation resulting from such Business
Combination (including, without limitation, a corporation which as a result of
such transaction owns the Company or all or substantially all of the Company's
assets either directly or through one or more subsidiaries) in substantially the
same proportions as their ownership, immediately prior to such Business
Combination, of the Outstanding Company Common Stock and Outstanding Company
Voting Securities, as the case may be, and (B) no Person (excluding any employee
benefit plan (or related trust)



                                       2
<PAGE>   3

sponsored or maintained by the Company or any Affiliate of the Company, or such
corporation resulting from such Business Combination or any Affiliate of such
corporation) beneficially owns, directly or indirectly, 40% or more of,
respectively, the fully diluted shares of common stock of the corporation
resulting from such Business Combination, as reflected on such corporation's
financial statements, or the combined voting power of the then outstanding
voting securities of such corporation except to the extent that such ownership
existed prior to the Business Combination and (C) at least a majority of the
members of the board of directors of the corporation resulting from such
Business Combination were members of the Incumbent Board at the time of the
execution of the initial agreement, or of the action of the Board, providing for
such Business Combination; or

                           (iv) Approval by the shareholders of the Company of a
complete liquidation or dissolution of the
Company.


                  (f) "COBRA" shall mean 29 U.S.C. ss.ss. 1161-1168, as amended
from time to time.

                  (g) "Disability" shall mean a medically determined physical or
mental impairment which qualifies the Employee for benefits under the Company's
long-term disability program. An Employee shall not be deemed to have incurred a
Disability until such benefits actually become payable (i.e., after any
applicable waiting period). If the Company does not maintain a long-term
disability program, or if the Employee does not elect coverage under such
program, Disability shall mean the incapacity of the Employee such that he is
unable to perform his duties to the Company for a period of 150 out of 180
consecutive days, as determined in the reasonable judgment of the Committee.

                  (h) "Good Reason" shall mean (i) a good faith determination by
the Employee that the Company or any of its officers has (A) taken any action
which materially and adversely changes the Employee's position (including
titles), authority or responsibilities with the Company or reduces the
Employee's ability to carry out his duties and responsibilities with the Company
or (B) has failed to take any action where such failure results in material and
adverse changes in the Employee's position (including titles), authority or
responsibilities with the Company or reduces the Employee's ability to carry out
his duties and responsibilities with the Company; (ii) a reduction in the
Employee's Base Salary or a restriction on the eligibility requirements for
other forms of monetary compensation that is inconsistent with the eligibility
requirements used prior to a Change of Control; or (iii) requiring the Employee
to be employed at any location more than 35 miles further from his principal
residence than the location at which the Employee was employed immediately
preceding the Change of Control, in any case of (i), (ii) or (iii) without the
Employee's prior written consent.

                  (i) "Incumbent Board" shall mean a member of the Board of
Directors of the Corporation who is not an Acquiring Person, or an affiliate (as
defined in Rule 12b-2 of the Exchange Act) or an associate (as defined in Rule
12b-2 of the Exchange Act) of an Acquiring Person, or a representative or
nominee of an Acquiring Person.

                  (j) "IRS" shall mean the United States Internal Revenue
Service.



                                       3
<PAGE>   4

                  (k) "Term" shall mean the term of this Agreement as set forth
in Section 2.

                  (l) "Welfare Benefits" shall mean all benefits provided by the
Company to its employees pursuant to an "employee welfare benefit plan" as
defined in Section 3(1) of the Employee Retirement Income Security Act of 1974,
as amended.

                  2. Effective Date; Term. This Agreement shall be effective as
of the Effective Date, and shall remain in effect up to and including November
11, 2000, after which time this Agreement shall expire; provided, however, that
on November 12, 2000, and on each subsequent anniversary thereof (each an
"Anniversary Date"), the Term of this Agreement shall automatically be extended
for one additional year, unless at least sixty (60) days prior to such
Anniversary Date, either party to this Agreement gives written notice to the
other party of an intent to cancel such automatic extension, in which case this
Agreement shall expire upon the expiration of the then existing Term; further
provided, however, that, notwithstanding the above, (a) if a Change of Control
occurs prior to the termination of this Agreement, or (b) if prior to the
termination of this Agreement the Board becomes aware of any circumstances which
in the ordinary course result in a Change of Control (whether or not with
respect to the party first coming to the Board's attention), then under no
circumstances will this Agreement terminate prior to the date that is 31 days
following the second anniversary of the Change of Control. Notwithstanding this
Section 2, the Company's obligations under this Agreement shall survive the
termination of this Agreement if all events giving rise to such obligations
occurred prior to such termination.

                  3. Obligations of the Company upon Termination. If, during the
two year period following the effective date of a Change of Control, the Company
terminates the Employee's employment other than for Cause or Disability, or the
Employee terminates his employment for Good Reason or if, during the thirty day
period following the two year anniversary of the effective date of a Change of
Control, the Employee terminates his employment for any reason:

                  (a) the Company shall pay to the Employee in a lump sum within
15 days following Employee's termination of employment:

                           (i) if not theretofore paid, an amount equal to any
                           portion of the Employee's earned but unpaid Base
                           Salary (including unused but accrued vacation time)
                           through the date of termination of employment; and

                           (ii) a cash amount equal to twice the sum of:

                                    (A) the Employee's annual Base Salary and

                                    (B) the Employee's Annual Bonus.

                  (b) the Company shall provide, for the period of two years
following the date of Employee's termination of employment, all Welfare Benefits
for the Employee and his



                                       4
<PAGE>   5

dependents and beneficiaries that are at least as favorable in all material
respects as the benefits provided to such person immediately preceding the
Change of Control and to employees employed by the Company or its successor in
positions following the Change of Control that are similar to the position the
Employee held immediately prior to the Change of Control ("Similarly Situated
Active Employees"); provided, however, that, with respect to this Section 3(b),
the Employee shall be required to pay the same share of the cost of such Welfare
Benefits as Similarly Situated Active Employees.

                  (c) the Company shall continue to be obligated to provide all
the benefits provided for under the Company's defined benefit retirement plans
and defined contribution retirement plans, including the Company's Supplemental
Excess Retirement Plan.

                  4. Certain Additional Payments by the Company

                  (a) Anything in this Agreement to the contrary
notwithstanding, in the event it shall be determined that any payment or
distribution by the Company to or for the benefit of the Employee, or any
benefit provided by the Company to the Employee (whether paid or payable or
distributed or distributable provided pursuant to the terms of this Agreement or
otherwise, but determined without regard to any additional payments required
under this Section 4) (a "Payment") would be subject to the excise tax imposed
by Section 4999 of the Code (or any successor provision) or any interest or
penalties are incurred by the Employee with respect to such excise tax (such
excise tax, together with any such interest and penalties, are hereinafter
collectively referred to as the "Excise Tax"), then the Employee shall be
entitled to receive an additional payment (a "Gross-Up Payment") in an amount
such that after payment by the Employee of all taxes with respect to the
Gross-Up Payment (including any interest or penalties imposed with respect to
such taxes), including, without limitation, any income taxes (and any interest
and penalties imposed with respect thereto) and Excise Tax imposed upon the
Gross-Up Payment, the Employee retains an amount of the Gross-Up Payment equal
to the Excise Tax imposed upon the Payment.

                  (b) Subject to the provisions of Section 4(c), all
determinations required to be made under this Section 4, including whether and
when a Gross-Up Payment is required and the amount of such Gross-Up Payment and
the assumptions to be utilized in arriving at such determination, shall be made
by Ernst & Young or such other nationally recognized accounting firm then
auditing the accounts of the Company (the "Accounting Firm") which shall provide
detailed supporting calculations both to the Company and the Employee within 15
business days of the receipt of notice from the Employee that there has been a
Payment, or such earlier time as is requested by the Company. In the event that
the Accounting Firm is serving as accountant or auditor for the individual,
entity or group effecting the Change of Control, or is unwilling or unable to
perform its obligations pursuant to this Section 4, the Employee shall appoint
another nationally recognized accounting firm to make the determinations
required hereunder (which accounting firm shall then be referred to as the
Accounting Firm hereunder). All fees and expenses of the Accounting Firm shall
be borne solely by the Company. Any Gross-Up Payment, determined pursuant to
this Section 4, shall be paid by the Company to the Employee within five days of
the receipt of the Accounting Firm's determination. Any determination by the
Accounting Firm shall be binding upon the Company and the Employee. As a result
of the



                                       5
<PAGE>   6

potential uncertainty in the application of Section 4999 of the Code (or any
successor provision) at the time of the initial determination by the Accounting
Firm hereunder, it is possible that Gross-Up Payments which will not have been
made by the Company should have been made ("Underpayment"), consistent with the
calculations required to be made hereunder. In the event that the Company
exhausts its remedies pursuant to Section 4(c) and the Employee thereafter is
required to make a payment of any Excise Tax, the Accounting Firm shall
determine the amount of the Underpayment that has occurred and any such
Underpayment shall be promptly paid by the Company to or for the benefit of the
Employee.

                  (c) The Employee shall notify the Company in writing of any
claim by the IRS that, if successful, would require the payment by the Company
of the Gross-Up Payment. Such notification shall be given as soon as practicable
but no later than 20 business days after the Employee is informed in writing of
such claim and shall apprise the Company of the nature of such claim and the
date on which such claim is requested to be paid. The Employee shall not pay
such claim prior to the expiration of the 30-day period following the date on
which he gives such notice to the Company (or such shorter period ending on the
date that any payment of taxes with respect to such claim is due). If the
Company notifies the Employee in writing prior to the expiration of such period
that it desires to contest such claim, the Employee shall:

                           (i)      give the Company any information reasonably
                                    requested by the Company relating to such
                                    claim,

                           (ii)     take such action in connection with
                                    contesting such claim as the Company shall
                                    reasonably request in writing from time to
                                    time, including, without limitation,
                                    accepting legal representation with respect
                                    to such claim by an attorney reasonably
                                    selected by the Company,

                           (iii)    cooperate with the Company in good faith in
                                    order effectively to contest such claim, and

                           (iv)     permit the Company to participate in any
                                    proceedings relating to such claim;

provided, however, that the Company shall bear and pay directly all costs and
expenses (including additional interest and penalties) incurred in connection
with such contest and shall indemnify and hold the Employee harmless, on an
after-tax basis, for any Excise Tax or income tax (including interest and
penalties with respect thereto) imposed as a result of such representation and
payment of costs and expenses. Without limiting the foregoing provisions of this
Section 4(c), the Company shall control all proceedings taken in connection with
such contest and, at its sole option, may pursue or forgo any and all
administrative appeals, proceedings, hearings and conferences with the taxing
authority in respect of such claim and may, at its sole option, either direct
the Employee to pay the tax claimed and sue for a refund or contest the claim in
any permissible manner, and the Employee agrees to prosecute such contest to a
determination before any administrative tribunal, in a court of initial
jurisdiction and in one or more appellate courts, as the Company shall
determine; provided, however, that if the



                                       6
<PAGE>   7

Company directs the Employee to pay such claim and sue for a refund, the Company
shall advance the amount of such payment to the Employee, on an interest-free
basis, and shall indemnify and hold the Employee harmless, on an after-tax
basis, from any Excise Tax or income tax (including interest or penalties with
respect thereto) imposed with respect to such advance or with respect to any
imputed income with respect to such advance; and further provided that any
extension of the statute of limitations relating to payment of taxes for the
taxable year of the Employee with respect to which such contested amount is
claimed to be due is limited solely to such contested amount. Furthermore, the
Company's control of the contest shall be limited to issues with respect to
which a Gross-Up Payment would be payable hereunder and the Employee shall be
entitled to settle or contest, as the case may be, any other issue raised by the
IRS or any other taxing authority.

                  (d) If, after the receipt by the Employee of an amount
advanced by the Company pursuant to Section 4(c), the Employee becomes entitled
to receive any refund with respect to such claim, the Employee shall (subject to
the Company's complying with the requirements of Section 4(c)) promptly pay to
the Company the amount of such refund (together with any interest paid or
credited thereon after taxes applicable thereto). If, after the receipt by the
Employee of an amount advanced by the Company pursuant to Section 4(c), a
determination is made that the Employee shall not be entitled to any refund with
respect to such claim and the Company does not notify the Employee in writing of
its intent to contest such denial of refund prior to the expiration of 30 days
after such determination, then such advance shall be forgiven and shall not be
required to be repaid and the amount of such advance shall offset, to the extent
thereof, the amount of Gross-Up Payment required to be paid.

                  5. Other Compensation and Benefits. The amount payable under
this Agreement in accordance with Section 3(a) shall not be reduced on account
of any compensation received by the Employee from other employment. From and
after the date the Employee is employed by a third party which provides any of
the benefits described in Section 3(b), the Company shall not be obligated to
provide the benefits to the extent provided by such third party.

                  6. Legal Fees and Expenses. The Company shall promptly
reimburse the Employee for the reasonable legal fees and expenses incurred by
the Employee in connection with enforcing any right of the Employee pursuant to
and afforded by this Agreement; provided, however, that the Company only will
reimburse the Employee for such legal fees and expenses if, in connection with
enforcing any right of the Employee pursuant to and afforded by this Agreement,
either (a) a judgment has been rendered in favor of the Employee by a duly
authorized court of law, (b) a duly authorized court of law determines that the
Employee's claim was not frivolous, or (c) the Company and the Employee have
entered into a settlement agreement providing for the payment to the Employee of
any or all amounts due hereunder.

                  7. Confidential Information. The Employee shall not disclose
any secret or confidential information, knowledge or data relating to the
Company or any of its affiliated companies, and their respective businesses,
obtained by the Employee during his employment by the Company or any of its
affiliated companies and which is not otherwise public knowledge. In no event
shall an asserted violation of the provisions of this Section 7 constitute a
basis for



                                       7
<PAGE>   8

deferring or withholding any amounts or benefits otherwise payable to the
Employee under this Agreement.

                  8. Release from Other Severance Benefits; COBRA. The Employee
hereby waives and releases the Company from the obligation to pay any severance
benefits to the Employee on account of a termination of employment on or after a
Change of Control, under any termination or severance policy of the Company
other than this Agreement, so long as all payments are made, and benefits
provided, to the Employee pursuant to Sections 3(a) and (b) herein. To the
extent that the obligation of the Company to provide medical benefits pursuant
to Section 3(b) is fulfilled, the period in which such medical benefits are
provided shall be credited towards the continued health care coverage required
to be offered to the Employee by COBRA, to the extent allowable under COBRA and
the regulations promulgated thereunder. In the event that no payment or benefits
are required pursuant to Sections 3(a) and (b), the Employee rescinds any such
waiver and release. Except for payments provided pursuant to the Company's
formal severance policy, if any, the benefits and payments to be provided by
this Agreement will not reduce or eliminate any benefits or payments of any kind
whatsoever that are to be provided to the Employee, including but not limited
to, under any vacation policy, defined benefit retirement plan, defined
contribution retirement plan, and the Company's Supplemental Excess Retirement
Plan.

                  9. Successors. (a) This Agreement is personal to the Employee
and, without the prior written consent of the Company, shall not be assignable
by the Employee otherwise than by will or the laws of descent and distribution.
This Agreement shall inure to the benefit of and be enforceable by the
Employee's legal representatives.

                  (b) This Agreement shall inure to the benefit of and be
binding upon the Company and its successors. The Company shall cause any
successor to its business, in any transaction in which this Agreement would not
be assumed by such successor by operation of law, to assume this Agreement by
contract.

                  10. Miscellaneous. (a) Applicable Law. This Agreement shall be
governed by and construed in accordance with the laws of the State of North
Carolina, applied without reference to principles of conflict of laws.

                  (b) Notices. All notices and other communications hereunder
shall be in writing and shall be given by hand delivery to the other party or by
registered or certified mail, return receipt requested, postage prepaid, or
overnight delivery service requiring acknowledgement of receipt, addressed as
follows:

                  If to the Employee:       _________________________

                                            _________________________

                                            _________________________



                                       8
<PAGE>   9

                  If to the Company: Martin Marietta Materials, Inc.
                                     2710 Wycliff Road
                                     Raleigh, North Carolina   27607
                                     Attention: Vice President and
                                                General Counsel

or to such other address as either party shall have furnished to the other in
writing in accordance herewith. Notices and communications shall be effective
when actually received by the addressee.

                  (c) Tax Withholding. The Company may withhold from any amounts
payable under this Agreement such Federal, state or local taxes as shall be
required to be withheld pursuant to any applicable law or regulation.


                           IN WITNESS WHEREOF, the Employee has hereunto set his
hand and the Company has caused this Agreement to be executed in its name on its
behalf, as of the day and year first above written.


                                         MARTIN MARIETTA MATERIALS, INC.



                                         By: ________________________________
                                                  Stephen P. Zelnak, Jr.
                                                  Chairman and Chief
                                                    Executive Officer



                                         EMPLOYEE



                                         -----------------------------------
                                         Name


                                       9

<PAGE>   1

                                                                   EXHIBIT 10.13

                               AMENDMENT NO. 2 TO
                              INCENTIVE STOCK PLAN



         The Martin Marietta Materials, Inc. Incentive Stock Plan, as amended
from time to time, (the "Plan") is hereby amended by this Amendment No. 2 as
follows, effective as of May 19, 1999.

         Section 2.09 of the Plan is amended and restated as follows:

                           "2.09 Identified Employee means an Eligible Employee
               (a) who is the Chief Executive Officer of the Corporation or an
               elected vice president of the Corporation, in each case unless
               the Committee, in its sole discretion, determines not to
               designate such officer as an Identified Employee, or (b) who is
               otherwise designated by the Committee as an Identified Employee
               for any Plan Year."

         All other terms and provisions of the Plan remain in full force and
effect.


<PAGE>   1



                         MARTIN MARIETTA MATERIALS, INC.
                       SUPPLEMENTAL EXCESS RETIREMENT PLAN


SECTION 1.        ESTABLISHMENT AND PURPOSE OF PLAN

         The Martin Marietta Materials, Inc. Supplemental Excess Retirement Plan
("Plan") is hereby established by Martin Marietta Materials, Inc., a North
Carolina corporation (the "Corporation"). The purpose of this Plan is to provide
additional, supplemental benefits to employees of Martin Marietta Materials,
Inc. and certain of its subsidiaries or affiliates to replace vested retirement
and death benefits that would otherwise be payable under certain other
retirement plans of the Corporation and such subsidiaries or affiliates but for:

         (1)      the limitations of Sections 401(a)(17) and 415 of the Internal
                  Revenue Code of 1986, as amended ("Code"); and

         (2)      the incidental death benefit rule of Treas. Reg. ss.
                  1.401-1(b)(1)(i).

         Lockheed Martin Corporation, as successor to Martin Marietta
Corporation, maintained the Martin Marietta Corporation Supplemental Excess
Retirement Plan (the "Martin Marietta Corporation Plan") effective September 28,
1978. This Plan is intended to supersede and replace the Martin Marietta
Corporation Plan with respect to Employees covered by this Plan.

         This Plan is intended to be unfunded and is maintained primarily for
the purpose of providing deferred compensation for a select group of management
or highly compensated employees.

SECTION 2.        DEFINITIONS

         The following terms as used in this Plan shall have the following
meanings:

         "Administrator" (within the meaning of Section 3(16)(A) of ERISA) means
Martin Marietta Materials, Inc. Martin Marietta Materials, Inc.'s
responsibilities as Administrator,
<PAGE>   2

under this Plan and under law, shall, except as otherwise provided in this Plan,
be carried out by or under the supervision of a Benefit Plan Committee appointed
by and serving at the pleasure of Martin Marietta Materials, Inc.

         "Base Salary" means the highest annual rate of base salary that the
Employee receives from the Corporation or its affiliates within the twelve-month
period ending on the date of a Change of Control.

         "Board" means the Board of Directors of the Corporation.

         "Cause" means the Employee's having been convicted in a court of
competent jurisdiction of a felony or has been adjudged by a court of competent
jurisdiction to be liable for fraudulent or dishonest conduct, or gross abuse of
authority or discretion, with respect to the Company, and such conviction or
adjudication has become final and non-appealable. The Employee shall not be
deemed to have been terminated for Cause, unless the Corporation shall have
given the Employee (A) notice setting forth, in reasonable detail, the facts and
circumstances claimed to provide a basis for termination for Cause, (B) a
reasonable opportunity for the Employee, together with his counsel, to be heard
before the Board and (C) a notice of termination stating that, in the reasonable
judgment of the Board, the Employee was guilty of conduct set forth in clauses
(i), (ii), (iii) or (iv) above, and specifying the particulars thereof in
reasonable detail.

         "Change of Control" means:

         (i) The acquisition on or after October 18, 1996 by any individual,
entity or group (within the meaning of Section 13(d)(3) or 14(d)(2) of the
Securities Exchange Act of 1934, as amended (the "Exchange Act")) (an "Acquiring
Person") of beneficial ownership (within the meaning of Rule 13d-3 promulgated
under the Exchange Act) of 40% or more of either (A) the

                                  Page 2 of 24
<PAGE>   3

fully diluted shares of common stock of the Corporation, as reflected on the
Corporation's financial statements (the "Outstanding Corporation Common Stock"),
or (B) the combined voting power of the then outstanding voting securities of
the Corporation entitled to vote generally in the election of directors (the
"Outstanding Corporation Voting Securities"); provided, however, that for
purposes of this subsection (i), the following acquisitions shall not constitute
a Change of Control: (X) any acquisition by the Corporation or any "affiliate"
of the Corporation, within the meaning of 17 C.F.R. ss. 230.405 (an
"Affiliate"), (Y) any acquisition by any employee benefit plan (or related
trust) sponsored or maintained by the Corporation or any Affiliate of the
Corporation or (Z) any acquisition by any entity pursuant to a transaction which
complies with clauses (A), (B) and (C) of subsection (iii) of this definition;
or

         (ii) Individuals who constitute the Incumbent Board cease for any
reason to constitute at least a majority of the Board; or

         (iii) Consummation of a reorganization, merger or consolidation or sale
or other disposition of all or substantially all of the assets of the
Corporation (a "Business Combination"), in each case, unless, following such
Business Combination, (A) all or substantially all of the individuals and
entities who were the beneficial owners, respectively, of the Outstanding
Corporation Common Stock and Outstanding Corporation Voting Securities
immediately prior to such Business Combination beneficially own, directly or
indirectly, more than 50% of, respectively, the then outstanding shares of
common stock and the combined voting power of the then outstanding voting
securities entitled to vote generally in the election of directors, as the case
may be, of the corporation resulting from such Business Combination (including,
without limitation, a corporation which as a result of such transaction owns the
Corporation or all or substantially all of the Corporation's assets either
directly or through one or more subsidiaries) in

                                  Page 3 of 24
<PAGE>   4

substantially the same proportions as their ownership, immediately prior to such
Business Combination, of the Outstanding Corporation Common Stock and
Outstanding Corporation Voting Securities, as the case may be, and (B) no Person
(excluding any employee benefit plan (or related trust) sponsored or maintained
by the Corporation or any Affiliate of the Corporation, or such corporation
resulting from such Business Combination or any Affiliate of such corporation)
beneficially owns, directly or indirectly, 40% or more of, respectively, the
fully diluted shares of common stock of the corporation resulting from such
Business Combination, as reflected on such corporation's financial statements,
or the combined voting power of the then outstanding voting securities of such
corporation except to the extent that such ownership existed prior to the
Business Combination and (C) at least a majority of the members of the board of
directors of the corporation resulting from such Business Combination were
members of the Incumbent Board at the time of the execution of the initial
agreement, or of the action of the Board, providing for such Business
Combination; or

         (iv) Approval by the shareholders of the Corporation of a complete
liquidation or dissolution of the Corporation.

         "Corporation" means Martin Marietta Materials, Inc.

         "Disability" means a medically determined physical or mental impairment
that qualifies the Employee for benefits under the Company's long-term
disability program. An Employee shall not be deemed to have incurred a
Disability until such benefits actually become payable (i.e., after any
applicable waiting period). If the Corporation does not maintain a long-term
disability program, or if the Employee does not elect coverage under such
program, Disability shall mean the incapacity of the Employee such that he is
unable to perform his duties to the

                                  Page 4 of 24
<PAGE>   5

Corporation for a period of 150 out of 180 consecutive days, as determined in
the reasonable judgment of the Administrator.

         "Employee" means a person employed by the Corporation or a subsidiary
or affiliate and who is a participant of a Retirement Plan of the Corporation.

         "Good Reason" means (i) a good faith determination by the Employee that
the Corporation or any of its officers has (A) taken any action which materially
and adversely changes the Employee's position (including titles), authority or
responsibilities with the Corporation or reduces the Employee's ability to carry
out his duties and responsibilities with the Corporation or (B) has failed to
take any action where such failure results in material and adverse changes in
the Employee's position, (including titles), authority or responsibilities with
the Corporation or reduces the Employee's ability to carry out his duties and
responsibilities with the Corporation; (ii) a reduction in the Employee's Base
Salary or a restriction on the eligibility requirements for other forms of
monetary compensation that is inconsistent with the eligibility requirements
used prior to a Change of Control; or (iii) requiring the Employee to be
employed at any location more than 35 miles further from his principal residence
than the location at which the Employee was employed immediately preceding the
Change of Control, in any case of (i), (ii) or (iii) without the Employee's
prior written consent.

         "Incumbent Board" means a member of the Board of Directors of the
Corporation who is not an Acquiring Person, or an affiliate (as defined in Rule
12b-2 of the Exchange Act) or an associate (as defined in Rule 12b-2 of the
Exchange Act) of an Acquiring Person, or a representative or nominee of an
Acquiring Person.

         "Lump Sum Value" means the actuarial present value of a Participant's
benefits based upon the assumptions used to determine lump sum value under the
applicable provisions of the

                                  Page 5 of 24
<PAGE>   6

Retirement Plan for the purpose of determining whether the Retirement Plan
benefit shall be paid in a lump-sum settlement. The Corporation may amend the
foregoing definition of "Lump Sum Value" at any time, but such amendment shall
not be effective with respect to a Participant unless both adopted by the
Corporation and communicated to the Participant in writing by the Corporation at
least fifteen (15) months prior to the Participant's commencement of benefits
under this Plan.

         "Participant" means an Employee to whom this Plan applies as provided
in Section 3 or, (except as otherwise prohibited by the context) upon and
following such Participant's death, his surviving spouse or beneficiary(ies), if
any, with respect to any death benefit payable to them under this Plan.

         "Retirement Date" means the Participant's normal retirement date or
early retirement date, whichever is applicable, under the Retirement Plan.

         "Retirement Plan" means the Martin Marietta Materials, Inc. Pension
Plan for Salaried Employees as in effect from time to time (including such plan
as it may be renamed and including any successor plan thereto for salaried
employees or the portion of a plan which portion is a separate benefit structure
for salaried employees and is a successor thereto).

SECTION 3.        ELIGIBILITY

         This Plan shall apply to any Employee who is a participant in the
Retirement Plan and whose benefits under the Retirement Plan are limited or
reduced by the limitations of Section 401(a)(17) or 415 of the Code, and, in the
case of death, whose death benefits under the Retirement Plan are limited or
reduced by the incidental death benefit rule of Treas. Reg. ss.
1.401-1(b)(1)(i).


                                  Page 6 of 24
<PAGE>   7

SECTION 4.        RETIREMENT BENEFIT COMMENCEMENT DATE

         4.1 Except as provided in Section 11, a Participant's retirement
benefit commencement date under this Plan shall be the same as his retirement
benefit commencement date under the Retirement Plan.

SECTION 5.        AMOUNT OF BENEFITS

         5.1 A Participant shall receive a retirement benefit (including,
without limitation, a deferred vested retirement benefit) from this Plan equal
to the excess, if any, of (1) the benefit (adjusted by Section 11 if applicable)
that would have been paid under the Retirement Plan (as the same may be in
effect from time to time) if the Retirement Plan did not include the limitations
imposed by Sections 401(a)(17) and 415 of the Code over (2) the benefit actually
payable under the Retirement Plan.

         5.2 The designated Retirement Plan beneficiary of a Participant who is
entitled to receive a death benefit under Article VIII, Pre-Retirement Death
Benefit, of the Retirement Plan shall receive a lump sum pre-retirement death
benefit from this Plan equal to the excess, if any, of (1) the lump sum
pre-retirement death benefit which would have been paid to such designated
beneficiary pursuant to the Retirement Plan if such payment were not limited by
(i) Section 401(a)(17) of the Code and (ii) the incidental death benefit rule of
Treas. Reg. ss. 1.401-1(b)(1)(i) (as interpreted in Revenue Ruling 85-15) over
(2) the lump sum death benefit actually payable under Article VIII of the
Retirement Plan.

         5.3 The surviving spouse of a Participant who is entitled to receive a
death benefit under Article VII, Pre-Retirement Surviving Spouse Benefit, of the
Retirement Plan shall receive

                                  Page 7 of 24
<PAGE>   8

a pre-retirement surviving spouse annuity from this Plan equal to the excess, if
any, of (1) the pre-retirement surviving spouse annuity benefit which would have
been paid to such surviving spouse pursuant to the Retirement Plan if such
payment were not limited by (i) Sections 401(a)(17) and 415 of the Code and (ii)
the incidental death benefit rule of Treas. Reg. ss. 1.401-1(b)(1)(i) (as
interpreted in Revenue Ruling 85-15) over (2) the pre-retirement surviving
spouse annuity benefit actually payable under Article VII of the Retirement
Plan.

         5.4 In no event shall the computation of benefits under this Plan take
into account any service performed by a Participant after separation from
employment with the Corporation or its subsidiaries and affiliates. (This
limitation is not intended to prevent the addition of years of credited service
as provided in Section 11.)

         5.5 Notwithstanding anything to the contrary herein, the Corporation in
its sole discretion may (but shall not be obligated to) make any payment under
this Plan before it would otherwise be made if, based on any of the following
events, it determines, in good faith based on consultation with counsel, that a
Participant or his beneficiary has or is likely to recognize income for federal
income tax purposes with respect to amounts payable under this Plan before such
amounts are otherwise to be paid if such income is attributable to:

         (1)      a change in the Code, or the Treasury Regulations thereunder,
                  or a binding or predominant judicial construction thereof;

         (2)      a published ruling or similar announcement issued by the
                  Internal Revenue Service;

         (3)      a decision by a court of competent jurisdiction involving a
                  Participant, a Participant's beneficiary, the Corporation, or
                  any entity involved in making payments under this Plan; or

                                  Page 8 of 24
<PAGE>   9

         (4)      a final determination of tax liability following a contested
                  dispute on audit (or a closing agreement made under Section
                  7121 of the Code) that involves a Participant, a Participant's
                  beneficiary(ies), the Corporation, or any entity involved in
                  making payments under this Plan.

         5.6 Benefits shall be payable under this Plan only to Participants who
retire or otherwise terminate employment from the Corporation or any designated
subsidiary or affiliate after the effective date of this Plan or, with respect
to death benefits under Sections 5.2 and 5.3, who die after the effective date
of this Plan. (Any former Employee who was covered under the Martin Marietta
Corporation Plan and whose benefits commenced prior to such effective date under
the Martin Marietta Corporation Plan shall continue to receive from this Plan
the same benefits such former Employee was receiving under the Martin Marietta
Corporation Plan.) The benefit payable to or with respect to a Participant under
this Plan shall be determined based on the Participant's entire Retirement Plan
benefit without distinction as to what part of such benefit, if any, may have
accrued before and what part after the effective date of this Plan.

         5.7 A Participant shall be entitled to receive vested retirement and
death benefits under this Plan if and only if the Participant's retirement
benefit under the Retirement Plan (including, without limitation, a deferred
vested retirement benefit) is vested. Except as provided in Section 11, the
benefits payable under this Plan to a Participant who terminates employment
before retirement shall be paid on a deferred vested basis if the Participant's
Retirement Plan benefits are paid on a deferred vested basis.

                                  Page 9 of 24
<PAGE>   10

SECTION 6.        PAYMENTS OF BENEFITS

         6.1 Except as provided in Section 6.4 and by Section 11, payment of
benefits (including, without limitation, benefits under Sections 5.1 and 5.3) to
any person under this Plan shall be made in a cash lump sum payment equal to the
Lump Sum Value of the benefits at the same time (including payment on a deferred
vested basis) as benefits commence to such person under the Retirement Plan (or
as soon thereafter as reasonably practicable). The determination of such Lump
Sum Value shall be made as soon as reasonably practicable and shall be made as
of the same date such a determination would be made under the Retirement Plan in
order to determine whether, at the time they actually commence and regardless of
their actual form of payment, such Retirement Plan benefits would be payable in
a lump-sum settlement.

         6.2 Any amount required to be withheld under applicable Federal, state
and local income tax laws shall be withheld from any payments under this Plan
and the amount of the payments shall be reduced by the amount so withheld.

         6.3 All payments under this Plan shall be made from the general funds
of the Corporation. The Corporation may, at its discretion, establish a trust to
hold assets from which benefits payments may be made. This Plan is intended in
all events to be unfunded within the meaning of ERISA and for all purposes under
the Code.

         6.4

         (a) The Participant may elect that the benefits payable to any person
under Sections 5.1 and 5.3 shall be paid at the same time, to the same person
and under the same form as benefits paid to such person under the Retirement
Plan and in accordance with all the terms and conditions applicable to payment
of such benefits under the Retirement Plan. In order to be effective, the
Participant's election under this Section 6.4(a) must be made in writing and
must

                                 Page 10 of 24
<PAGE>   11

be delivered to the Secretary of the Corporation no later than one year prior to
the date of the commencement of benefits. Any such election may be revoked in
writing by the Participant. In order to be effective, such written revocation
must be delivered to the Secretary of the Corporation no later than one year
prior to the date of the commencement of benefits. Notwithstanding the
foregoing, the Participant may designate a beneficiary to receive after the
Participant's death any benefit payments continuing after the Participant's
death, which beneficiary is different from the person who is receiving the
Retirement Plan benefits (however, if such death benefits hereunder are based on
a life of any individual, the benefits hereunder shall be based on the life of
the same individual as under the Retirement Plan even though paid to a different
person). Such beneficiary designation must be made in writing and received by
the Administrator prior to the Participant's death. In the absence of such a
designation, the benefits shall be paid to same person who is receiving the
Retirement Plan benefits.

         (b) Notwithstanding Section 6.1 or Section 6.4(a), in the event that
the Lump Sum Value of the sum of the benefits payable to a Participant or
surviving spouse under this Plan is $20,000 or less, determined as of the date
of the Participant's termination of employment, then all such benefits will be
paid in a cash lump-sum settlement equal to the Lump Sum Value of such benefits
in full discharge of all liabilities with respect to such benefits. The
Corporation shall determine such Lump Sum Value and pay such lump-sum settlement
as soon as reasonably practicable following the date of the Participant's
termination of employment.

                                 Page 11 of 24
<PAGE>   12

SECTION 7.        AMENDMENT AND TERMINATION

         The Corporation may:

         (1)      terminate this Plan with respect to future Participants or
                  future benefit accruals for current Participants; and

         (2)      amend this Plan in any respect, at any time (except that the
                  definition of "Lump Sum Value" may be amended only as provided
                  in connection with such definition, above in Section 2).

However, without the agreement of the Participant, no such termination or
amendment may reduce the amount of any then accrued benefit of any Participant
or otherwise diminish the rights of any Participant with respect to such accrued
benefit (except as provided above in Section 7(2) and in Section 2 with respect
to amendment of the definition of "Lump Sum Value"), and any such purported
termination or amendment shall be void. The prohibition against reduction in the
accrued benefit shall not be interpreted in any manner that would result in a
Participant, beneficiary or surviving spouse actually receiving from the
Retirement Plan and this Plan, combined, a benefit greater than such person
would be entitled to receive under the Retirement Plan alone (except as a result
of Section 11) if the limitations of Sections 401(a)(17) and 415 of the Code and
the incidental death benefit rule of Treas. Reg. ss. 1.401-1(b)(1)(i) (as
interpreted in Revenue Ruling 85-15) did not apply.

SECTION 8.        ADMINISTRATION

         8.1 The Corporation is the plan sponsor under Section 3(16)(B) of
ERISA.

         8.2 The Administrator is the named fiduciary of this Plan and as such
shall have the authority to control and manage the operation and administration
of this Plan except as otherwise

                                 Page 12 of 24
<PAGE>   13

expressly provided in this plan document. The named fiduciary may designate
persons other than the named fiduciary to carry out fiduciary responsibilities
under this Plan. Any such designation must be in writing and must be accepted in
writing by any such other person.

         8.3 The Administrator has the authority (without limitation as to other
authority) to delegate its duties to agents and to make rules and regulations
that it believes are necessary or appropriate to carry out this Plan.

         8.4 The Administrator has the discretion as a Plan fiduciary (i) to
interpret and construe the terms and provisions of this Plan (including any
rules or regulations adopted under this Plan), (ii) to determine eligibility to
participate in this Plan and (iii) to make factual determinations in connection
with any of the foregoing. A decision of the Administrator with respect to any
matter pertaining to this Plan including without limitation the Employees
determined to be Participants, the benefits payable, and the construction or
interpretation of any provision thereof, shall be conclusive and binding upon
all interested persons.

SECTION 9.        CLAIMS PROCEDURE

         9.1 A Participant with an interest in this Plan shall have the right to
file a claim for benefits under this Plan and to appeal any denial of a claim
for benefits. Any request for a Plan benefit or to clarify the Participant's
rights to future benefits under the terms of this Plan shall be considered to be
a claim.

         9.2 A claim for benefits will be considered as having been made when
submitted in writing by the Participant (or by such claimant's authorized
representative) to the Administrator. No particular form is required for the
claim, but the written claim must identify the name of the

                                 Page 13 of 24
<PAGE>   14

claimant and describe generally the benefit to which the claimant believes he is
entitled. The claim may be delivered personally during normal business hours or
mailed to the Administrator.

         9.3 The Administrator will determine whether, or to what extent, the
claim may be allowed or denied under the terms of this Plan. If the claim is
wholly or partially denied, the claimant shall be so informed by written notice
within 90 days after the day the claim is submitted unless special circumstances
require an extension of time for processing the claim. If such an extension of
time for processing is required, written notice of the extension shall be
furnished to the claimant prior to the termination of the initial 90-day period.
Such extension may not exceed an additional 90 days from the end of the initial
90-day period. The extension notice shall indicate the special circumstances
requiring an extension of time and the date by which the Administrator expects
to render the final decision. If written notice of denial of a claim (in whole
or in part) is not furnished within the initial 90-day period after the claim is
sent to the Administrator (or, if applicable, the extended 90-day period), the
claimant shall consider that his claim has been denied just as if he had
received actual notice of denial.

         9.4 The notice informing the claimant that his claim has been wholly or
partially denied shall be written in a manner calculated to be understood by the
claimant and shall include:

         (1)      The specific reason(s) for the denial.

         (2)      Specific reference to pertinent Plan provisions on which the
                  denial is based.

         (3)      A description of any additional material or information
                  necessary for the claimant to perfect the claim and an
                  explanation of why such material or information is necessary.

         (4)      Appropriate information as to the steps to be taken if the
                  participant or beneficiary wishes to submit his claim for
                  review.

                                 Page 14 of 24
<PAGE>   15

         9.5 If the claim is wholly or partially denied, the claimant (or his
authorized representative) may file an appeal of the denied claim with the
Administrator requesting that the claim be reviewed. The Administrator shall
conduct a full and fair review of each appealed claim and its denial. Unless the
Administrator notifies the claimant that due to the nature of the benefit and
other attendant circumstances he is entitled to a greater period of time within
which to submit his request for review of a denied claim, the claimant shall
have 60 days after he (or his authorized representative) receives written notice
of denial of his claim within which such request must be submitted to the
Administrator.

         9.6 The request for review of a denied claim must be made in writing.
In connection with making such request, the claimant or his authorized
representative may:

         (1)      Review pertinent documents.

         (2)      Submit issues and comments in writing.

         9.7 The decision of the Administrator regarding the appeal shall be
promptly given to the claimant in writing and shall normally be given no later
than 60 days following the receipt of the request for review. However, if
special circumstances (for example, if the Administrator decides to hold a
hearing on the appeal) require a further extension of time for processing, the
decision shall be rendered as soon as possible, but no later than 120 days after
receipt of the request for review. However, if the Administrator holds regularly
scheduled meetings at least quarterly, a decision on review shall be made by no
later than the date of the meeting which immediately follows the Administrator's
receipt of a request for review, unless the request is filed within 30 days
preceding the date of such meeting. In such case, a decision may be made by no
later than the date of the second meeting following the Administrator's receipt
of the request for review. If special circumstances (for example, if the
Administrator decides to hold a

                                 Page 15 of 24
<PAGE>   16

hearing on the appeal) require a further extension of time for processing, the
decision shall be rendered as soon as possible, but no later than the third
meeting following the Administrator's receipt of the request for review. If
special circumstances require that the decision will be made beyond the initial
time for furnishing the decision, written notice of the extension shall be
furnished to the claimant (or his authorized representative) prior to the
commencement of the extension. The decision on review shall be in writing and
shall be furnished to the claimant or to his authorized representative within
the appropriate time for the decision. If a written decision on review is not
furnished within the appropriate time, the claim shall be deemed to have been
denied on appeal.

         9.8 The Administrator may, in its sole discretion, decide to hold a
hearing if it determines that a hearing is necessary or appropriate in order to
make a full and fair review of the appealed claim.

         9.9 The decision on review shall include specific reasons for the
decision, written in a manner calculated to be understood by the claimant, as
well as specific references to the pertinent Plan provisions on which the
decision is based.

         9.10 A Participant must exhaust his rights to file a claim and to
request a review of the denial of his claim before bringing any civil action to
recover benefits due to him under the terms of this Plan, to enforce his rights
under the terms of this Plan, or to clarify his rights to future benefits under
the terms of this Plan.

         9.11 The Administrator shall exercise its responsibility and authority
under this claims procedure as a fiduciary and, in such capacity, shall have the
discretionary authority and responsibility (1) to interpret and construe this
Plan and any rules or regulations under this Plan, (2) to determine the
eligibility of Employees to participate in this Plan, and the rights of

                                 Page 16 of 24
<PAGE>   17


Participants to receive benefits under this Plan, and (3) to make factual
determinations in connection with any of the foregoing.

SECTION 10.       GENERAL PROVISIONS

         10.1 Nothing in this Plan shall be deemed to give any person the right
to remain in the employ of the Corporation, its subsidiaries or affiliates or
affect the right of the Corporation to terminate any Participant's employment
with or without cause.

         10.2 No right or interest of any person entitled to a benefit under
this Plan shall be subject to voluntary or involuntary alienation, assignment,
or transfer of any kind.

         10.3 This Plan shall be construed and administered in accordance with
the laws of the State of North Carolina to the extent that such laws are not
preempted by Federal law.

SECTION 11.       CHANGE OF CONTROL

         11.1 In the event of a Change of Control, the Participant's benefits
under this Plan shall be determined by taking into account the rules of Section
11.2 through 11.5 (including Appendix I); provided, that, at the time of or in
anticipation of the Change of Control, or after the Change of Control if the
Incumbent Board constitutes a majority of the Board of Directors of the
Corporation, the Incumbent Board by vote of a majority of such board may
determine that any or all of the actions described in Section 11.5 (and Section
11.2 to the extent it refers to Section 11.5) are not required or appropriate in
its honest, good faith judgment to achieve the fair and equitable treatment of
some or all of the Participants, including but not limited to making the
determination that the immediate lump sum payment described in Section 11.5 will
be equal to the actuarial present value of such benefit payments based on the
mortality table applicable under

                                 Page 17 of 24
<PAGE>   18

the Retirement Plan and an assumed interest rate no greater than the interest
rate then used under the Retirement Plan to determine the amount of a lump sum
payment.

         11.2 If, during the two year period following the effective date of a
Change in Control, the Corporation terminates the Participant's employment other
than for Cause or Disability, or the Participant terminates his employment for
Good Reason or if, during the thirty day period following the two year
anniversary of the effective date of a Change of Control, the Participant
terminates his employment for any reason, then the Participant's benefits under
this Plan shall be determined and paid (i) as provided in Sections 11.3 through
11.5 if the Participant has an Employment Protection Agreement with the
Corporation and (ii) as provided in Section 11.5 if the Participant does not
have an Employment Protection Agreement with the Corporation. The application of
the provisions of Sections 11.3, 11.4 and 11.5 are illustrated by the examples
in Appendix I, which shall be deemed to be a part of this Plan. If for any
reason benefits are not payable under this Section 11, this Section 11 shall in
no way apply to or restrict the payment of benefits otherwise provided for under
this Plan. For example, if following a Change in Control the Corporation
terminates the Participant's employment for Cause, then notwithstanding that the
Participant shall not have his benefits determined and paid under this Section
11, the Participant shall continue to be entitled to his benefits as otherwise
provided under this Plan.

         11.3 For the purpose of determining the benefit under Section 5.1, the
benefit that would have been paid under the Retirement Plan (but for the
limitations of Sections 401(a)(17) and 415 of the Code) shall be determined by
taking into account (i) the amount of the Employee's lump sum payment under
Section 3(a) of the Employee's Employment Protection Agreement with the
Corporation, as provided in Section 11.4, and (ii) additional years of credited
service equal to

                                 Page 18 of 24
<PAGE>   19

the number ("multiplier") that is multiplied by the Employee's annual base
salary and annual bonus (both as defined in the Employee's Employment Protection
Agreement) to determine the amount of the payment under Section 3(a) of such
Employment Protection Agreement. (Such additional years of credited service
shall not, however, be taken into account for vesting purposes.) In addition,
for Participants with Employment Protection Agreements there shall be no
reduction for benefit commencement prior to age 65 and as early as age 55 on
the net benefit (after reduction for the payment under the Retirement Plan)
payable under this Plan.

         11.4 The lump sum payment shall be taken into account by dividing the
amount of the lump sum payment by the multiplier and by treating the Employee as
having additional pensionable earnings, for the purpose of determining the
Participant's final-average pensionable earnings, equal to such amount for a
number of additional calendar years equal to the multiplier. Moreover, such
additional calendar years shall extend the number of calendar years taken into
account in determining final-average pensionable earnings.

         11.5 The Participant shall receive an immediate lump sum payment that
is the actuarial present value of the Participant's benefits commencing as of
the Participant's earliest retirement date (age 55 or current age if older)
under this Plan. The actuarial present value shall be based on the mortality
table applicable under the Retirement Plan determined as of the date of the
Participant's termination of employment and based on an interest rate of 0.0
percent. Such lump sum payment shall be paid to the Participant no later than 30
days after the Participant's termination of employment.

         11.6 In the event of a Change of Control, then with respect to any
matter involving or relating to a disputed benefit under this Plan, all
administrative decisions, determinations, and interpretations, administrative
rules, claims decisions and the like shall be made on behalf of the
Administrator only by a majority of the Incumbent Board, provided that the
Incumbent Board

                                 Page 19 of 24
<PAGE>   20

then constitutes a majority of the Board. If the Incumbent Board does not then
constitute a majority of the Board, then any such decisions, determinations,
interpretations and rules shall be made on behalf of the Administrator only by
an arbitration panel. The arbitration shall be binding and shall be conducted
pursuant to the Federal Arbitration Act before an independent arbitration panel
mutually agreed upon by the Participant and the Administrator. In the event the
parties are unable to agree upon a suitable independent arbitration panel,
arbitration shall be before the American Arbitration Association. The
arbitration panel shall consist of three members, one selected by the
Administrator, one selected by the Participant, and the third selected by the
first two arbitrators. The decisions made by a majority of the panel shall be
final and binding on the parties and may be entered and enforced in any court of
competent jurisdiction.

 SECTION 12. COMMUTATION OF BENEFITS

         If as a result of a change in the tax laws or as a result of any other
event any benefit payment (or the value thereof) hereunder becomes taxable to a
person (the payment of whose benefits hereunder have commenced) prior to the
time the benefit payment is actually received by such person, the Corporation
shall commute all remaining benefit payments into a single lump sum payment
equal to the Lump Sum Value of such remaining benefit payments. The amount of
such lump sum payment shall be determined and paid to such person as soon as
reasonably practicable.

                                 Page 20 of 24
<PAGE>   21

         This Plan shall be effective as of October 18, 1996, which date shall
be referred to as the effective date of this Plan. This plan document has been
executed on behalf of the Corporation this 21st day of March, 2000.


                                        MARTIN MARIETTA MATERIALS, INC.

                                        By: /s/ Stephen P. Zelnak, Jr.
                                            ------------------------------------
                                            Name

                                            Chairman and Chief Executive Officer
                                            ------------------------------------
                                            Title


                                        By: /s/ Jonathan T. Stewart
                                            ------------------------------------
                                            Name

                                            Vice President
                                            ------------------------------------
                                            Title


                                 Page 21 of 24
<PAGE>   22


                         MARTIN MARIETTA MATERIALS, INC.
                       SUPPLEMENTAL EXCESS RETIREMENT PLAN




                                   APPENDIX I

         EXAMPLE ONE. The application of Sections 11.3 and 11.4 is illustrated
by the following example, which assumes that the Participant has an Employment
Protection Agreement with the Corporation. Assume: the Employee's lump sum
payment under Section 3(a) of the Employee's Employment Protection Agreement is
twice the Employee's annual base salary and annual bonus. The multiplier,
therefore, is two (2). Assume: the Employee's lump sum payment under Section
3(a) of the Employment Protection Agreement is $500,000. The Employee shall be
entitled to two (2) additional calendar years of pensionable earnings of
$250,000 each. Assume: the Retirement Plan provides that the Employee's
final-average pensionable earnings thereunder is the average of the annual
pensionable earnings for the five (5) consecutive calendar years selected from
the most recent ten (10) consecutive calendar years that would provide the
highest average. Assume: without regard to this Plan the Participant's
pensionable earnings under the Retirement Plan for the ten (10) most recent
consecutive calendar years are:

         Year 1      =     $190,000
         Year 2      =     $195,000
         Year 3      =     $200,000
         Year 4      =     $195,000
         Year 5      =     $210,000
         Year 6      =     $220,000
         Year 7      =     $220,000
         Year 8      =     $250,000
         Year 9      =     $250,000
         Year 10     =     $240,000


                                 Page 22 of 24
<PAGE>   23

Under the Retirement Plan, the Participant's final-average pensionable earnings
would be the average of his pensionable earnings for years 6 through 10, or
$236,000. For the purpose of determining the benefit under Section 5.1 of this
Plan, the benefit that would have been paid under the Retirement Plan (but for
the limitations of Sections 401(a)(17) and 415 of the Code) shall be determined
by taking into account pensionable earnings of $250,000 for each of two
additional years, Year 11 and Year 12, without dropping Year 1 and Year 2, with
the result that Participant's final-average pensionable earnings would be the
average of his pensionable earnings for Years 8 through 12, or $248,000 (the
highest 5 consecutive calendar years out of the most recent 12 years). Assume:
without regard to this Plan the Participant would have 19 years of credited
service under the Retirement Plan. For the purpose of determining the benefit
under Section 5.1 of this Plan, the benefit that would have been paid under the
Retirement Plan (but for the limitations of Sections 401(a)(17) and 415 of the
Code) shall be determined by treating the Participant as having 21 years of
credited service (19 years plus 2 years (from the multiplier)). Assume that the
annual retirement benefit provided under the Retirement Plan is 0.0175
multiplied by the Participant's final-average pensionable earnings multiplied by
the Participant's years of credited service. Under the Retirement Plan the
Participant's annual benefit disregarding Sections 401(a)(17) and 415 of the
Code would be: $236,000 X 19 X 0.0175 = $78,470. Assume: the Participant's
annual benefit under the Retirement Plan taking into account the limitations of
Sections 401(a)(17) and 415 of the Code would be: $195,000 X 19 X 0.0175 =
$64,837.50. Then, the Participant's annual benefit under this Plan would be:
($248,000 X 21 X 0.0175) or $91,140 minus $64,837.50 = $26,302.50 commencing as
of the Participant's earliest retirement date (age 55); note that no reduction
is applied on the net benefit ($26,302.50) for commencement as early as age 55.


                                 Page 23 of 24
<PAGE>   24

         EXAMPLE TWO. The application of Section 11.5 is illustrated by the
following example. Assume that the Participant in Example One terminated
employment at age 49. Assume: under the mortality table then in effect under the
Retirement Plan, the actuarial present value factor at age 49 of annual benefits
commencing at age 55 is 26.5. The amount of the Participant's lump sum payment
at age 49 under this Plan would be 26.5 X $26,302.50 = $697,016.25 (unless the
Incumbent Board votes to use an interest rate higher than 0.0 percent to
determine the actuarial present value of such $26,302.50 benefit payments).

         EXAMPLE THREE. The application of Section 11.5 is further illustrated
by the following example. Assume the same facts as in Example One and Example
Two, except that the Participant did not have an Employment Protection
Agreement. Under the Retirement Plan the Participant's annual benefit commencing
at age 65 and disregarding Sections 401(a)(17) and 415 of the Code would be
$236,000 x 19 x 0.0175 = $78,470.00. The annual benefit commencing at age 65
under the Retirement Plan taking into account the limitations of Sections
401(a)(17) and 415 of the Code would be $195,000 x 19 x 0.0175 = $64,837.50.
Assume that the reduction factor for benefits commencing at age 55 is 0.64. Then
the annual benefit commencing at age 55 under this Plan would be ($78,470.00 -
$64,837.50) x 0.64 = $8,724.80 and the amount of the Participant's lump sum
payment at age 49 under this Plan would be 26.5 x $8,724.80 = $231,207.20
(unless the Incumbent Board votes to use an interest rate higher than 0.0
percent to determine the actuarial present value of such $8,724.80 benefit
payments).


                                     Page 24


<PAGE>   1
                                                                   EXHIBIT 10.17


                                                                  EXECUTION COPY


                 AMENDED AND RESTATED REVOLVING CREDIT AGREEMENT


         AMENDED AND RESTATED REVOLVING CREDIT AGREEMENT dated as of August 11,
1999 among MARTIN MARIETTA MATERIALS, INC. (the "Borrower"), the BANKS listed on
the signature pages hereof (the "Banks") and MORGAN GUARANTY TRUST COMPANY OF
NEW YORK, as Agent (the "Agent").

                              W I T N E S S E T H :

         WHEREAS, certain of the parties hereto have heretofore entered into a
Revolving Credit Agreement dated as of December 3, 1998 (the "Agreement");

         WHEREAS, at the date hereof, there are no Loans outstanding under the
Agreement; and

         WHEREAS, the parties hereto desire to make the amendments specified
below and to restate the Agreement in its entirety to read as set forth in the
Agreement with the amendments specified below;

         NOW, THEREFORE, the parties hereto agree as follows:

         SECTION 1.  Definitions; References.

         (a) Unless otherwise specifically defined herein, each term used herein
which is defined in the Agreement shall have the meaning assigned to such term
in the Agreement. Each reference to "hereof", "hereunder," "herein" and "hereby"
and each other similar reference and each reference to "this Agreement" and each
other similar reference contained in the Agreement shall from and after the date
hereof refer to the Agreement as amended hereby.

          (b) The following definitions are added to Section 1.01 of the
Agreement, in appropriate alphabetical order:

         "YEAR 2000 COMPLIANT" means the ability to perform properly
date-sensitive functions for all dates before and from and after January 1,
2000.

         "YEAR 2000 PROBLEM" means the risk that computer applications used by
the Borrower, its Subsidiaries, or the suppliers and vendors of the Borrower and


<PAGE>   2

its Subsidiaries may be unable to recognize and perform properly date sensitive
functions involving certain dates prior to and any date after December 31, 1999.

         SECTION 2. Extension of Facility. The date "December 2, 1999" in the
definition of "Termination Date" in Section 1.01 of the Agreement is changed to
"August 9, 2000."

         SECTION 3. New Pricing Schedule. The Schedule annexed hereto is hereby
substituted for the Pricing Schedule as annexed to the Agreement.

         SECTION 4. Change in Conditions to Borrowing. Section 3.02(e) of the
Agreement is amended to read as follows:

                  (e) the fact that, except as otherwise described by the
                  Borrower in a writing to the Agent and waived by the Required
                  Banks, the representations and warranties of the Borrower
                  contained in this Agreement (except, in the case of any
                  Borrowing subsequent to the Closing Date, the representations
                  and warranties set forth in Sections 4.04(c), 4.05, 4.06,
                  4.08, 4.13, 4.14 and 4.16) shall be true on and as of the date
                  of such Borrowing.

         SECTION 5. Updated Representations. (a) Each reference to "1997" in
Section 4.04(a) of the Agreement is replaced with "1998."

          (b) Each reference to "September 30, 1998" in Section 4.04(b) and
Section 4.04(c) of the Agreement is replaced with "March 31, 1999."

         (c) Each reference to "nine months" in Section 4.04(b) in the Agreement
is replaced with "three months."

          (d) Each reference to "September 30, 1998" in the definition of
"Borrower's Latest Form 10-Q" is replaced with "March 31, 1999."

          (e) The following new Section 4.16 is added to the Agreement:

         SECTION 4.16. Year 2000 Compliance. The Borrower has (i) initiated a
         review and assessment of all areas within its and each of its
         Subsidiaries' business and operations (including those affected by
         suppliers and vendors) that could be adversely affected by the Year
         2000 Problem, (ii) developed a plan and timeline for addressing the
         Year 2000 Problem on a timely basis and (iii) to date, implemented such
         plan in accordance with such timetable. The Borrower is exercising
         commercially reasonable efforts to cause the computer hardware and
         software within the critical



                                       2
<PAGE>   3

         business systems of the Borrower and its Subsidiaries to be Year 2000
         Compliant. The Borrower has no reason to believe that such critical
         business systems will not function on any given date in a manner which
         would be reasonably likely to have a Material Adverse Effect.

         SECTION 6. Change in Commitments. With effect from and including the
date this Amendment and Restatement becomes effective in accordance with Section
8 hereof, (i) each Person listed on the signature pages hereof which is not a
party to the Agreement shall become a Bank party to the Agreement and (ii) the
Commitment of each Bank shall be the amount set forth opposite the name of such
Bank in the Commitment Schedule annexed hereto. Any Bank whose Commitment is
changed to zero shall upon such effectiveness cease to be a Bank party to the
Agreement, and all accrued fees and other amounts payable under the Agreement
for the account of such Bank shall be due and payable on such date; provided
that the provisions of Sections 8.03 and 9.03 of the Agreement shall continue to
inure to the benefit of each such Bank.

         SECTION 7. Representations and Warranties. The Borrower hereby
represents and warrants that as of the date hereof and after giving effect
hereto:

         (a) no Default has occurred and is continuing; and

         (b) each representation and warranty of the Borrower set forth in the
Agreement after giving effect to this Amendment and Restatement is true and
correct as though made on and as of such date.

         SECTION 8. Governing Law. This Amendment and Restatement shall be
governed by and construed in accordance with the laws of the State of New York.

         SECTION 9. Counterparts; Effectiveness. This Amendment and Restatement
may be signed in any number of counterparts, each of which shall be an original,
with the same effect as if the signatures thereto and hereto were upon the same
instrument. This Amendment and Restatement shall become effective as of the date
hereof when the Agent shall have received:

         (a) duly executed counterparts hereof signed by the Borrower and the
Banks (or, in the case of any party as to which an executed counterpart shall
not have been received, the Agent shall have received telegraphic, telex or
other written confirmation from such party of execution of a counterpart hereof
by such party);

         (b) an opinion of Willkie Farr & Gallagher, counsel for the Borrower
(or such other counsel for the Borrower as may be acceptable to the Agent)



                                       3
<PAGE>   4

substantially to the effect of Exhibit E to the Agreement with reference to this
Amendment and Restatement and the Agreement as amended and restated hereby; and

          (c) all documents it may reasonably request relating to the existence
of the Borrower, the corporate authority for and the validity of this Agreement,
and any other matters relevant hereto, all in form and substance satisfactory to
the Agent;

provided that this Amendment and Restatement shall not become effective or
binding on any party hereto unless all of the foregoing conditions are satisfied
not later than August 15, 1999. The Agent shall promptly notify the Borrower and
the Banks of the effectiveness of this Amendment and Restatement, and such
notice shall be conclusive and binding on all parties hereto.


                                       4
<PAGE>   5

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed by their respective authorized officers as of the day and year
first above written.

                                       MARTIN MARIETTA MATERIALS, INC.


                                       By: /s/ Stephen P. Zelnak, Jr.
                                           ------------------------------------
                                           Name: Stephen P. Zelnak, Jr.
                                           Title: Chairman & CEO
                                           Address:

                                           Facsimile:



                                       MORGAN GUARANTY TRUST COMPANY OF NEW YORK


                                       By: /s/ Robert Bottamedi
                                           ------------------------------------
                                           Name: Robert Bottamedi
                                           Title: Vice President


                                       FIRST UNION NATIONAL BANK


                                       By: /s/ G. Mendel Lay, Jr.
                                           ------------------------------------
                                           Name: G. Mendel Lay, Jr.
                                           Title: Senior Vice President



                                       WACHOVIA BANK, N.A.


                                       By: /s/ Keith A. Sherman
                                           ------------------------------------
                                           Name: Keith A. Sherman
                                           Title: Senior Vice President


                                       5
<PAGE>   6

                                        BANK OF AMERICA, N.A.


                                        By: /s/ Kathryn W. Robinson
                                            ------------------------------------
                                            Name: Kathryn W. Robinson
                                            Title: Managing Director



                                        BANQUE NATIONALE DE PARIS,
                                          HOUSTON AGENCY


                                        By: /s/ Henry F. Setina
                                            ------------------------------------
                                            Name: Henry F. Setina
                                            Title: Vice President



                                        BRANCH BANKING & TRUST COMPANY


                                        By: /s/ Richard E. Fowler
                                            ------------------------------------
                                            Name: Richard E. Fowler
                                            Title: Senior Vice President



                                        CENTURA BANK


                                        By: /s/ J. Michael Dickinson
                                            ------------------------------------
                                            Name: J. Michael Dickinson
                                            Title: Corporate Banking Officer



                                       6
<PAGE>   7


                                        STATE STREET BANK


                                        By: /s/ Jacqueline Kuss
                                            ------------------------------------
                                            Name: Jacqueline Kuss
                                            Title: Vice President



                                        NORWEST BANK COLORADO,
                                          NATIONAL ASSOCIATION


                                        By: /s/ Carol A. Ward
                                            ------------------------------------
                                            Name: Carol A. Ward
                                            Title: Vice President


                                       7
<PAGE>   8


                                        MORGAN GUARANTY TRUST COMPANY
                                          OF NEW YORK, as Agent


                                        By: /s/ Robert Bottamedi
                                            ------------------------------------
                                            Name: Robert Bottamedi
                                            Title: Vice President
                                            Address: 60 Wall Street,
                                                     New York, NY 10260
                                            Facsimile:




                                       8
<PAGE>   9

                               COMMITMENT SCHEDULE


BANK                                                          COMMITMENT
- ----                                                          ----------
Morgan Guaranty Trust Company of New York                    $44,500,000
First Union National Bank                                     43,500,000
Wachovia Bank, N.A.                                           43,500,000
Bank of America, N.A.                                         43,500,000
Banque Nationale de Paris, Houston Agency                     25,000,000
Branch Banking & Trust Company                                25,000,000
Centura Bank                                                  25,000,000
State Street Bank                                             25,000,000
Norwest Bank Colorado, National Association                   25,000,000

                  TOTAL                                     $300,000,000


<PAGE>   10

                                PRICING SCHEDULE


         Each of "Facility Fee Rate" and "Euro-Dollar Margin" means, for any
day, the rate set forth below (in basis points per annum) in the row opposite
such term and in the column corresponding to the Pricing Level that apply for
such day:

<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------
PRICING LEVEL                                          LEVEL I     LEVEL II   LEVEL III
- ---------------------------------------------------------------------------------------
<S>                                                      <C>          <C>         <C>

Facility Fee Rate                                         7.0          8.0        11.0
- ---------------------------------------------------------------------------------------

Euro-Dollar Margin
     if Utilization is less than 25%                     18.0         27.0        39.0
     if Utilization is greater than or equal to 25%      38.0         47.0        64.0
- ---------------------------------------------------------------------------------------
</TABLE>

For purposes of this Schedule, the following terms have the following meanings,
subject to the further provisions of this Schedule:

         "LEVEL I PRICING" applies at any date if, at such date, the Borrower's
long-term debt is rated A or higher by S&P and no lower than A3 by Moody's or A2
or higher by Moody's and no lower than A- by S&P.

         "LEVEL II PRICING" applies at any date if, at such date, (i) the
Borrower's long-term debt is rated A- or higher by S&P and no lower than Baa1 by
Moody's or A3 or higher by Moody's and no lower than BBB+ by S&P and (ii) Level
I Pricing does not apply.

         "LEVEL III PRICING" applies at any date if, at such date, neither Level
I Pricing nor Level II Pricing applies.

         "MOODY'S" means Moody's Investors Service, Inc.

         "PRICING LEVEL" refers to the determination of which of Level I, Level
II or Level III applies at any date.

         "S&P" means Standard & Poor's Ratings Group.

         "UTILIZATION" means, at any date, the percentage equivalent of a
fraction the numerator of which is the aggregate outstanding principal amount of
the Loans at such date and the denominator of which is the aggregate amount of
the Commitments at such date. If for any reason any Loans remain outstanding


<PAGE>   11

following termination of the Commitments, Utilization shall be deemed to be in
excess of 25%.

         The credit ratings to be utilized for purposes of this Schedule are
those assigned to the senior unsecured long-term debt securities of the Borrower
without third-party credit enhancement, and any rating assigned to any other
debt security of the Borrower shall be disregarded. The ratings in effect for
any day are those in effect at the close of business on such day. The ratings in
effect for any day are those in effect at the close of business on such day, and
the Euro-Dollar Margin and Facility Fee Rate may change from time to time during
any Interest Period as a result of changes in the Pricing Level during such
Interest Period.



                                       2

<PAGE>   1

                                                                   EXHIBIT 12.01




          MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES


                COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

                      FOR THE YEAR ENDED DECEMBER 31, 1999
                             (AMOUNTS IN THOUSANDS)



EARNINGS:

Earnings before income taxes                                     $ 194,313
Earnings of less than 50%-owned associated companies, net             (487)
Interest expense                                                    39,411
Portion of rents representative of an interest factor                2,807
                                                                 ---------

     ADJUSTED EARNINGS AND FIXED CHARGES                         $ 236,044
                                                                 =========

FIXED CHARGES:

Interest Expense                                                 $  39,411
Capitalized interest                                                   834
Portion of rents representative of an interest factor                2,807
                                                                 ---------

     TOTAL FIXED CHARGES                                         $  43,052
                                                                 =========
RATIO OF EARNINGS TO FIXED CHARGES                                    5.48
                                                                 =========




<PAGE>   1
                                                                   EXHIBIT 13.01

               REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

BOARD OF DIRECTORS AND SHAREHOLDERS
MARTIN MARIETTA MATERIALS, INC.

We have audited the accompanying consolidated balance sheet of Martin Marietta
Materials, Inc., and subsidiaries at December 31, 1999 and 1998,and the related
consolidated statements of earnings, shareholders' equity and cash flows for
each of the three years in the period ended December 31, 1999.These financial
statements are the responsibility of the Corporation's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.

We conducted our audits in accordance with auditing standards generally
accepted in the United States. Those standards require that we plan and perform
the audit 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, the financial statements referred to above present fairly, in
all material respects, the consolidated financial position of Martin Marietta
Materials, Inc., and subsidiaries at December 31, 1999 and 1998,and the
consolidated results of their operations and their cash flows for each of the
three years in the period ended December 31, 1999,in conformity with accounting
principles generally accepted in the United States.



/s/ Ernst & Young LLP

Raleigh, North Carolina
January 24,2000


PAGE 10 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES


<PAGE>   2


STATEMENT OF FINANCIAL RESPONSIBILITY


SHAREHOLDERS
MARTIN MARIETTA MATERIALS, INC.

The management of Martin Marietta Materials, Inc., is responsible for the
consolidated financial statements and all related financial information
contained in this report. The financial statements, which include amounts based
on estimates and judgments, have been prepared in accordance with accounting
principles generally accepted in the United States applied on a consistent
basis.

The Corporation maintains a system of internal accounting controls designed and
intended to provide reasonable assurance that assets are safeguarded, that
transactions are executed and recorded in accordance with management's
authorization, and that accountability for assets is maintained. An environment
that establishes an appropriate level of control-consciousness is maintained
and monitored, and includes examinations by an internal audit staff and by the
independent auditors in connection with their annual audit.

The Corporation's management recognizes its responsibility to foster a strong
ethical climate. Management has issued written policy statements which document
the Corporation's business code of ethics. The importance of ethical behavior
is regularly communicated to all employees through the distribution of the Code
of Ethics and Standards of Conduct booklet and through ongoing education and
review programs designed to create a strong commitment to ethical business
practices.

The Audit Committee of the Board of Directors, which consists of four outside
directors, meets periodically and when appropriate, separately with the
independent auditors, management and the internal auditors to review the
activities of each.

The consolidated financial statements have been audited by Ernst & Young LLP,
independent auditors, whose report appears on the preceding page.



/s/ Janice K. Henry

Janice K. Henry
Senior Vice President, Chief Financial Officer and Treasurer


          MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 11


<PAGE>   3


CONSOLIDATED STATEMENT OF EARNINGS

for years ended December 31

<TABLE>
<CAPTION>

(add 000, except per share)                                      1999                  1998                  1997
- ---------------------------                              ------------          ------------          ------------
<S>                                                      <C>                   <C>                   <C>
NET SALES                                                $  1,258,827          $  1,057,691          $    900,863
Cost of sales                                                 948,128               776,043               665,594
                                                         ------------          ------------          ------------
GROSS PROFIT                                                  310,699               281,648               235,269
Selling, general and administrative expenses                   92,621                82,041                69,093
Research and development                                        2,789                 3,053                 3,406
                                                         ------------          ------------          ------------
EARNINGS FROM OPERATIONS                                      215,289               196,554               162,770
Interest expense on debt                                       39,411                23,759                16,899
Other income and (expenses), net                               18,435                 1,347                 5,341
                                                         ------------          ------------          ------------
Earnings before taxes on income                               194,313               174,142               151,212
Taxes on income                                                68,532                58,529                52,683
                                                         ------------          ------------          ------------

NET EARNINGS                                             $    125,781          $    115,613          $     98,529
                                                         ------------          ------------          ------------
NET EARNINGS PER COMMON SHARE
   -BASIC                                                $       2.70          $       2.49          $       2.14
   -DILUTED                                              $       2.68          $       2.48          $       2.13
                                                         ------------          ------------          ------------
AVERAGE NUMBER OF COMMON SHARES OUTSTANDING
   -BASIC                                                      46,668                46,454                46,122
   -DILUTED                                                    46,947                46,708                46,238
                                                         ------------          ------------          ------------

CASH DIVIDENDS PER COMMON SHARE                          $       0.52          $       0.50          $       0.48
                                                         ------------          ------------          ------------
</TABLE>


PAGE 12 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES


<PAGE>   4


CONSOLIDATED BALANCE SHEET

for years ended December 31

<TABLE>
<CAPTION>

ASSETS
(add 000)                                                                       1999                  1998
- ---------                                                               ------------          ------------
<S>                                                                     <C>                   <C>
CURRENT ASSETS:
Cash and cash equivalents                                               $      3,403          $     14,586
Accounts receivable, net                                                     197,554               171,511
Inventories                                                                  172,865               157,104
Current deferred income tax benefits                                          21,899                18,978
Other current assets                                                           7,644                 7,209
                                                                        ------------          ------------
TOTAL CURRENT ASSETS                                                         403,365               369,388
                                                                        ------------          ------------
Property, plant and equipment, net                                           846,993               777,528
Costs in excess of net assets acquired                                       375,327               348,026
Other intangibles                                                             31,497                27,952
Other noncurrent assets                                                       85,392                65,695
                                                                        ------------          ------------
TOTAL ASSETS                                                            $  1,742,574          $  1,588,589
                                                                        ------------          ------------
LIABILITIES AND SHAREHOLDERS' EQUITY
(add 000)
- ------------------------------------
CURRENT LIABILITIES:
Accounts payable                                                        $     55,872          $     57,720
Accrued salaries, benefits and payroll taxes                                  24,887                23,502
Accrued insurance and other taxes                                             26,705                25,370
Income taxes                                                                   4,293                 7,201
Current maturities of long-term debt and commercial paper                     39,722                15,657
Other current liabilities                                                     31,217                22,783
                                                                        ------------          ------------
TOTAL CURRENT LIABILITIES                                                    182,696               152,233
                                                                        ------------          ------------
Long-term debt and commercial paper                                          602,011               602,113
Pension, postretirement and postemployment benefits                           85,839                76,209
Noncurrent deferred income taxes                                              81,857                75,623
Other noncurrent liabilities                                                  16,165                14,712
                                                                        ------------          ------------
TOTAL LIABILITIES                                                            968,568               920,890
                                                                        ------------          ------------
SHAREHOLDERS' EQUITY:
Common stock,$0.01 par value;100,000,000 shares authorized                       467                   466
Additional paid-in capital                                                   354,046               349,245
Retained earnings                                                            419,493               317,988
                                                                        ------------          ------------
TOTAL SHAREHOLDERS' EQUITY                                                   774,006               667,699
                                                                        ------------          ------------
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY                              $  1,742,574          $  1,588,589
                                                                        ------------          ------------
</TABLE>

The notes on pages 16 to 25 are an integral part of these financial statements.


          MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 13


<PAGE>   5



CONSOLIDATED STATEMENT OF CASH FLOWS

for years ended December 31

<TABLE>
<CAPTION>

(add 000)                                                                                    1999            1998            1997
- ---------                                                                              ----------      ----------      ----------
<S>                                                                                    <C>             <C>             <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings                                                                           $  125,781      $  115,613      $   98,529

Adjustments to reconcile net earnings to cash provided by
operating activities:
  Depreciation, depletion and amortization                                                124,754          98,765          79,720
  Other items, net                                                                         (6,257)         (4,573)         (3,638)
  Changes in operating assets and liabilities:
     Deferred income taxes                                                                 (3,266)         (3,457)          7,090
     Net changes in receivables, inventories and payables                                 (31,513)         (9,661)         (2,865)
     Other assets and liabilities, net                                                     14,177          25,886          16,782
                                                                                       ----------      ----------      ----------
NET CASH PROVIDED BY OPERATING ACTIVITIES                                                 223,676         222,573         195,618

CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property, plant and equipment                                               (137,820)       (123,926)        (86,440)
Acquisitions, net                                                                         (77,080)       (347,882)       (279,056)
Transactions with Lockheed Martin Corporation                                                  --              --          23,768
Other investing activities, net                                                               339         (34,014)          8,359
                                                                                       ----------      ----------      ----------
NET CASH USED FOR INVESTING ACTIVITIES                                                   (214,561)       (505,822)       (333,369)

CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt                                                                 (618)         (1,704)       (226,367)
Increase in long-term debt                                                                    280         198,994         349,947
Commercial paper, net                                                                      15,000         105,000          60,000
Debt issue costs                                                                               --          (1,745)           (938)
Dividends paid                                                                            (24,276)        (23,233)        (22,134)
Issuances of common stock                                                                   2,022           1,862             164
Repurchases of common stock                                                               (12,706)             --              --
                                                                                       ----------      ----------      ----------
NET CASH (USED FOR) PROVIDED BY FINANCING ACTIVITIES                                      (20,298)        279,174         160,672
                                                                                       ----------      ----------      ----------
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS                                      (11,183)         (4,075)         22,921
CASH AND CASH EQUIVALENTS (BOOK OVERDRAFT), BEGINNING OF YEAR                              14,586          18,661          (4,260)
                                                                                       ----------      ----------      ----------
CASH AND CASH EQUIVALENTS, END OF YEAR                                                 $    3,403      $   14,586      $   18,661
                                                                                       ----------      ----------      ----------
</TABLE>


PAGE 14 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES


<PAGE>   6


CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY

for years ended December 31

<TABLE>
<CAPTION>
                                                                                                         Total
                                             Common            Additional         Retained       Shareholders'
(add 000)                                     Stock       Paid-In Capital         Earnings              Equity
- ---------                                    ------       ---------------         --------       -------------

<S>                                         <C>                <C>              <C>                 <C>
Balance at December 31, 1996                $   461            $  331,303       $  149,213          $  480,977
  Net earnings                                    -                     -           98,529              98,529
  Dividends declared ($0.48 a share)              -                     -          (22,134)            (22,134)
  Net stock transactions                          1                 4,463                -               4,464
                                            -------            ----------       ----------          ----------
Balance at December 31, 1997                    462               335,766          225,608             561,836
  Net earnings                                    -                     -          115,613             115,613
  Dividends declared ($0.50 a share)              -                     -          (23,233)            (23,233)
  Net stock transactions                          4                13,479                -              13,483
                                            -------            ----------       ----------          ----------
Balance at December 31, 1998                    466               349,245          317,988             667,699
  NET EARNINGS                                    -                     -          125,781             125,781
  DIVIDENDS DECLARED ($0.52 A SHARE)              -                     -          (24,276)            (24,276)
  NET STOCK TRANSACTIONS                          4                17,504                -              17,508
  REPURCHASES OF COMMON STOCK                    (3)              (12,703)               -             (12,706)
                                            -------            ----------       ----------          ----------

BALANCE AT DECEMBER 31, 1999                $   467            $  354,046       $  419,493          $  774,006
                                            -------            ----------       ----------          ----------
</TABLE>


The notes on pages 16 to 25 are an integral part of these financial statements.


          MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 15
<PAGE>   7
NOTE A: ACCOUNTING POLICIES

ORGANIZATION. Martin Marietta Materials, Inc. ("Martin Marietta Materials" or
the "Corporation") is engaged principally in the construction aggregates
business. Aggregates products are used primarily for construction of highways
and other infrastructure projects in the United States and in the domestic
commercial and residential construction industries. In addition, the
Corporation produces magnesia-based chemicals, refractories and dolomitic lime
products used in a wide variety of industrial, environmental and agricultural
applications with a majority of its products used by customers in the
worldwide steel industry.

BASIS OF CONSOLIDATION AND USE OF ESTIMATES. The consolidated financial
statements include the accounts of the Corporation and its wholly owned and
majority-owned subsidiaries. Partially owned affiliates are accounted for at
cost or as equity investments depending on the level of ownership interest or
the Corporation's ability to exercise control over the affiliates' operations.
In particular, the Corporation's 14% investment in Meridian Aggregates Company
("Meridian") is recorded at cost. The Corporation may be required to purchase
some or all of the other investors' interests in Meridian. The other
investors, by the terms of the original investment agreement, have an option,
exercisable at the end of each year beginning December 31, 2000, to require
the Corporation to purchase their interests at a predetermined formula price.
The Corporation also has an option to purchase Meridian at a predetermined
formula price beginning September 30, 2003.

All significant intercompany balances and transactions have been eliminated in
consolidation. The preparation of the Corporation's financial statements in
conformity with generally accepted accounting principles requires management
to make certain estimates and assumptions. Such judgments affect the reported
amounts in the consolidated financial statements and accompanying notes.
Actual results could differ from those estimates.

REVENUE RECOGNITION. Substantially all revenues are recognized, net of
discounts, if any, when finished products are shipped to unaffiliated
customers or services have been rendered, with appropriate provision for
uncollectible amounts. Revenues generally represent sales of materials to
customers, excluding freight and delivery charges.

CASH AND CASH EQUIVALENTS. Cash and cash equivalents are net of outstanding
checks that are funded daily as presented for payment. Cash equivalents are
comprised generally of highly liquid instruments with original maturities of
three months or less from the date of purchase. The Corporation's cash and
cash equivalents were invested with its former parent, Lockheed Martin
Corporation, through January 31, 1997. At that time, all funds held by
Lockheed Martin were transferred to the Corporation and invested under its own
cash management arrangements with third party commercial banks.

INVENTORIES VALUATION. Inventories are stated at the lower of cost or market.
Costs are determined principally by the first-in, first-out ("FIFO") method.

PROPERTIES AND DEPRECIATION. Property, plant and equipment are stated at cost.
Depreciation is computed over estimated service lives principally by the
straight-line method. The estimated service life for buildings ranges from 10
to 20 years and from 4 to 20 years for machinery and equipment. Depletion of
mineral deposits is calculated over estimated recoverable quantities
principally by the units-of-production method. Depreciation and depletion
expense was $103,928,000, $86,602,000 and $71,756,000 for the years ended
December 31, 1999, 1998 and 1997, respectively.

INTANGIBLE ASSETS. Costs in excess of net assets acquired ("goodwill")
represent the excess purchase price paid for acquired businesses over the
estimated fair value of identifiable assets and liabilities. Goodwill is
amortized ratably over appropriate periods ranging from 10 to 30 years. At
December 31, 1999 and 1998, the amounts for accumulated amortization of costs
in excess of net assets acquired were approximately $36,104,000 and
$21,685,000, respectively. Other intangibles represent amounts assigned
principally to noncompete agreements and are amortized ratably over periods
based on related contractual terms, generally 2 to 20 years. At December 31,
1999 and 1998, the amounts for accumulated amortization of other intangibles
were approximately $22,250,000 and $20,826,000, respectively. Amortization
expense for intangibles was $20,290,000, $12,163,000 and $7,964,000 for the
years ended December 31, 1999, 1998 and 1997, respectively.

The carrying value of goodwill and other intangibles is reviewed if the facts
and circumstances indicate potential impairment. If this review indicates that
the carrying value of goodwill and


PAGE 16  MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

<PAGE>   8

other intangibles is not recoverable, as determined based on estimated cash
flows of the business acquired over the remaining amortization period,
goodwill and other intangibles are reduced by the estimated shortfall of
discounted cash flows.

STOCK-BASED COMPENSATION. In 1996, the Corporation adopted the Statement of
Financial Accounting Standards No. 123, Accounting for Stock-Based Compensation
("FAS 123"). In accordance with FAS 123, the Corporation has elected to follow
Accounting Principles Board Opinion No. 25, Accounting for Stock Issued to
Employees, and related interpretations in accounting for certain of its employee
stock-based compensation plans.

ENVIRONMENTAL MATTERS. The Corporation records an accrual for environmental
remediation liabilities in the period in which it is probable that a liability
has been incurred and the appropriate amount can be estimated reasonably. Such
accruals are adjusted as further information develops or circumstances change.
Costs of future expenditures for environmental remediation obligations are
generally not discounted to their present value.

Certain normal reclamation and other environmental-related costs are treated
as normal ongoing operating expenses and expensed generally in the period in
which they are incurred.

INCOME TAXES. Deferred income tax assets and liabilities on the consolidated
balance sheet reflect the net tax effects of temporary differences between the
carrying amounts of assets and liabilities for financial reporting purposes
and the amounts used for income tax purposes.

RELATED PARTY TRANSACTIONS. The Corporation entered into certain agreements
with Meridian. These agreements require the Corporation to provide certain
advisory and consulting services at agreed-upon rates. In 1999, the
Corporation provided funds to finance certain Meridian expansion projects at
market rates of interest. Further, the Corporation is negotiating a multi-year
supply agreement whereby Meridian will provide aggregates to certain
operations in 2000 and beyond. The Corporation recorded an investment in
Meridian, including receivables and a convertible note, of $53,511,000 and
$42,267,000 at December 31, 1999 and 1998, respectively, and Meridian-related
revenue of $3,395,000 during 1999.

RESEARCH AND DEVELOPMENT AND SIMILAR COSTS. Research and development and
similar costs are charged to operations as incurred. Pre-operating costs and
start-up costs for new facilities and products are generally charged to
operations as incurred.

SEGMENT INFORMATION. Information concerning business segment data is included in
Management's Discussion and Analysis of Financial Condition and Results of
Operations on pages 34 through 36.

EARNINGS PER COMMON SHARE. Basic earnings per common share are based on the
weighted-average number of common shares outstanding during the year. Diluted
earnings per common share were computed assuming that the weighted-average
number of common shares was increased by the conversion of fixed awards
(employee stock options and incentive stock awards) and nonvested stock awards
to be issued to employees and non-employee members of the Corporation's Board
of Directors under certain stock-based compensation arrangements. The diluted
per-share computations reflect a change in the number of common shares
outstanding (the "denominator") to include the number of additional shares
that would have been outstanding if the potentially dilutive common shares had
been issued. In each year presented, the income available to common
shareholders (the "numerator") is the same for both basic and dilutive
per-share computations. The following table sets forth a reconciliation of the
denominators for the basic and diluted earnings per share computations for
each of the years ended December 31:

<TABLE>
<CAPTION>
                                        1999          1998          1997
                                  ----------    ----------    ----------
<S>                               <C>           <C>           <C>
BASIC EARNINGS PER
 COMMON SHARE:
  Weighted-average
  number of shares                46,667,600    46,453,900    46,121,800
                                  ----------    ----------    ----------

EFFECT OF DILUTIVE SECURITIES:
  Employee fixed awards              238,500       234,800       113,300
  Employee and Director
  nonvested stock                     40,900        18,900         2,700
                                  ----------    ----------    ----------

DILUTED EARNINGS PER
 COMMON SHARE:
  Weighted-average
  number of shares and
  assumed conversions             46,947,000    46,707,600    46,237,800
                                  ----------    ----------    ----------
</TABLE>

ACCOUNTING CHANGES. In June 1998, the Financial Accounting Standards Board
("FASB") issued the Statement of Financial Accounting Standards No. 133,
Accounting for Derivative Instruments and Hedging Activities ("FAS 133"),
which was required to be adopted in years beginning after June 15, 1999. The
FASB amended FAS 133 to defer the effective date of adoption until all fiscal
quarters of all fiscal years beginning after June 15, 2000. Statement of
Financial Accounting Standards


         MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES  PAGE 17
<PAGE>   9

No. 137, Accounting for Derivative Instruments and Hedging Activities -
Deferral of the Effective Date of FASB Statement No. 133, was issued in June
1999. Because of the Corporation's minimal use of derivatives, if any,
management does not anticipate that the adoption of FAS 133 will have a
significant impact on net earnings or the financial position of the
Corporation.

NOTE B: BUSINESS COMBINATIONS

As of December 4, 1998, the Corporation purchased all of the outstanding common
stock of Redland Stone Products Company ("Redland Stone") from an affiliate of
Lafarge SA. The operating results of the acquired business have been included
with those of the Corporation since that date.

The purchase price consisted of approximately $272 million in cash plus normal
balance sheet liabilities, subject to certain post-closing adjustments relating
to working capital, and approximately $8 million estimated for certain other
assumed liabilities and transaction costs. The acquisition has been accounted
for under the purchase method of accounting wherein the Corporation recognized
approximately $166 million in costs in excess of net assets acquired after
recording other purchase adjustments necessary to allocate the purchase price
to the fair value of assets acquired and liabilities assumed. Goodwill is being
amortized over a 30-year period. The preliminary purchase price allocation was
adjusted in 1999 within the applicable period provided by Accounting Principles
Bulletin No. 16, Business Combinations. The post-closing adjustments related to
working capital and other fair-value adjustments were finalized without a
significant impact on the preliminary purchase price allocation.

For comparative purposes, the following unaudited pro forma summary financial
information presents the historical results of operations of the Corporation
and the Redland Stone business for the year ended December 31, 1998. The
financial information reflects pro forma adjustments as if the acquisition had
been consummated as of the beginning of the period presented. The pro forma
financial information is based upon certain estimates and assumptions that
management of the Corporation believes are reasonable in the circumstances.
The unaudited pro forma information presented below is not necessarily
indicative of what results of operations actually would have been if the
acquisition had occurred on the date indicated. Moreover, they are not
necessarily indicative of future results.


PRO FORMA INFORMATION (Unaudited)
year ended December 31

<TABLE>
<CAPTION>
(add 000, except per share)         1998
- ---------------------------    -------------
<S>                            <C>
Net sales                      $   1,185,278

Net earnings                   $     113,113

Earnings per common share:
 Basic                         $        2.44
 Diluted                       $        2.42
                               =============
</TABLE>

Information concerning other business combinations completed during 1999 is
included in Management's Discussion and Analysis of Financial Condition and
Results of Operations on page 26.

NOTE C: ACCOUNTS RECEIVABLE
December 31

<TABLE>
<CAPTION>
(add 000)                                    1999                1998
- ---------                               ---------           ---------
<S>                                     <C>                 <C>
Customer receivables                    $ 193,380           $ 172,372
Other current receivables                   8,881               3,569
                                        ---------           ---------
                                          202,261             175,941
Less allowances                            (4,707)             (4,430)
                                        ---------           ---------
Total                                   $ 197,554           $ 171,511
                                        =========           =========
</TABLE>

NOTE D: INVENTORIES
December 31

<TABLE>
<CAPTION>
(add 000)                                    1999                1998
- ---------                               ---------           ---------
<S>                                     <C>                 <C>
Finished products                       $ 143,776           $ 127,904
Products in process and
  raw materials                             9,972              12,342
Supplies and expendable parts              25,862              25,307
                                        ---------           ---------
                                          179,610             165,553
Less allowances                            (6,745)             (8,449)
                                        ---------           ---------
Total                                   $ 172,865           $ 157,104
                                        =========           =========
</TABLE>

NOTE E: PROPERTY, PLANT AND EQUIPMENT, NET
December 31

<TABLE>
<CAPTION>
(add 000)                                    1999                1998
- ---------                              ----------          ----------
<S>                                    <C>                 <C>
Land and improvements                  $  182,670          $  164,362
Mineral deposits                          156,870             150,684
Buildings                                  69,273              63,205
Machinery and equipment                 1,170,592           1,072,258
Construction in progress                   73,803              52,003
                                       ----------          ----------
                                        1,653,208           1,502,512
Less allowances for depreciation
and depletion                            (806,215)           (724,984)
                                       ----------          ----------
Total                                  $  846,993          $  777,528
                                       ==========          ==========
</TABLE>

PAGE 18  MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES


<PAGE>   10

NOTE F: LONG-TERM DEBT
December 31

<TABLE>
<CAPTION>
(add 000)                                    1999                1998
- ---------                               ---------           ---------
<S>                                     <C>                 <C>
5.875% Notes, due 2008                  $ 199,059           $ 198,980
6.9% Notes, due 2007                      124,956             124,952
7% Debentures, due 2025                   124,215             124,204
Commercial Paper, interest rates
 ranging from 5.50% to 7.14%              180,000             165,000
Acquisition notes, interest rates
 ranging from 5.50% to 10.00%              12,395               3,299
Other notes                                 1,108               1,335
                                        ---------           ---------
Total                                     641,733             617,770
Less current maturities                   (39,722)            (15,657)
                                        ---------           ---------
Long-term debt                          $ 602,011           $ 602,113
                                        ---------           ---------
</TABLE>

The 5.875% Notes were offered and sold by the Corporation, through a private
placement, in December 1998, at 99.5% of their principal amount of
$200,000,000. The Corporation exchanged the Notes for publicly registered
notes with substantially identical terms. The effective interest rate on these
securities is 6.03%. The Notes are not redeemable prior to their maturity on
December 1, 2008.

During August 1997, the Corporation offered and sold the 6.9% Notes at 99.7%
of their principal amount of $125,000,000. The entire amount of these long-term
fixed rate debt securities was registered under the Corporation's shelf
registration statement on file with the Securities and Exchange Commission.
The effective interest rate on these securities is 6.91%. The Notes are not
redeemable prior to their maturity on August 15, 2007.

The 7% Debentures were sold at 99.3% of their principal amount of $125,000,000
in December 1995. The entire amount of these long-term fixed rate debt
securities was registered under the Corporation's shelf registration statement
on file with the Securities and Exchange Commission. The effective interest
rate is 7.05%,and the Debentures are not redeemable prior to their maturity
date of December 1, 2025.

These Notes and Debentures are carried net of original issue discount, which
is being amortized by the effective interest method over the life of the
issue.

The Corporation entered into revolving credit agreements, syndicated with a
group of domestic and foreign commercial banks, which provide for borrowings
of up to $150,000,000 for general corporate purposes through January 2002 and
$300,000,000 for general corporate purposes through August 2000 (collectively
the "Agreements"). Borrowings under these Agreements are unsecured and bear
interest, at the Corporation's option, at rates based upon: (i) the Eurodollar
rate (as defined on the basis of a LIBOR plus basis points related to a
pricing grid); (ii) a bank base rate (as defined on the basis of a published
prime rate or the Federal Funds Rate plus 1/2 of 1%); or (iii) a competitively
determined rate (as defined on the basis of a bidding process). These
Agreements contain restrictive covenants relating to leverage, requirements
for limitations on encumbrances, and provisions that relate to certain changes
in control. The Corporation is required to pay an annual loan commitment fee
to the bank group.

No borrowings were outstanding under the revolving credit agreements at
December 31, 1999. However,the Agreements support a commercial paper program
of $450,000,000,of which borrowings of $180,000,000 and $165,000,000 were
outstanding at December 31, 1999 and 1998, respectively. Of these amounts,
$150,000,000 at December 31, 1999 and 1998, was classified as long-term debt
on the Corporation's consolidated balance sheet based on management's ability
and intention to maintain this debt outstanding for at least one year. The
remaining $30,000,000 at December 31, 1999, and $15,000,000 at December 31,
1998, was classified as a current liability.

Excluding commercial paper, the Corporation's long-term debt maturities for
the five years following December 31, 1999,are:

<TABLE>
<CAPTION>
(add 000)
- --------
<S>                                     <C>
2000                                    $   9,722
2001                                        1,060
2002                                          893
2003                                          277
2004                                          213
Thereafter                                449,568
                                        ---------
Total                                   $ 461,733
                                        ---------
</TABLE>

Total interest paid was $37,108,000, $23,677,000 and $14,487,000 for the years
ended December 31, 1999, 1998 and 1997, respectively.

Amounts reflected in acquisitions, net, in the consolidated statement of cash
flows include assumed or incurred indebtedness of $9,208,000, $3,373,000 and
$1,364,000 for the years ended December 31, 1999, 1998 and 1997,respectively.
In addition, the amount reflected in acquisitions, net, for 1999, 1998 and
1997 excludes the effect of the issuance of approximately 311,100,280,100 and
123,500 shares, respectively, of the Corporation's common stock.


         MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES  PAGE 19

<PAGE>   11


NOTE G: FINANCIAL INSTRUMENTS

In addition to its long-term debt arrangements, the Corporation's financial
instruments also include temporary cash investments, customer accounts and
notes receivable, and commercial paper borrowings. Temporary investments are
placed with creditworthy financial institutions, primarily in Euro-time
deposits. The Corporation's cash equivalents principally have maturities of
less than three months. Due to the short maturity of these investments, they
are carried on the consolidated balance sheet at cost, which approximates
market value. Customer receivables are due from a large number of customers
who are dispersed across wide geographic and economic regions. At December 31,
1999 and 1998, the Corporation had no significant concentrations of credit
risk.

The estimated fair values of customer receivables and commercial paper
borrowings approximate their carrying amounts. The estimated fair values of
the Corporation's long-term debt instruments (excluding commercial paper
borrowings) at December 31, 1999,was approximately $420,768,000 compared with
a carrying amount of $461,733,000 on the consolidated balance sheet. The fair
values of long-term debt were estimated based on quoted market prices for
those instruments publicly traded. For privately placed debt, the fair values
were estimated based on the quoted market prices for similar issues, or on
current rates offered to the Corporation for debt of the same remaining
maturities.

NOTE H: INCOME TAXES

The components of the Corporation's tax expense (benefit) on income are as
follow:
<TABLE>
<CAPTION>
years ended December 31
(add 000)                               1999               1998              1997
- ---------                           --------           --------           -------
<S>                                 <C>                <C>                <C>
Federal income taxes:
 Current                            $ 61,349           $ 52,663           $40,916
Deferred                              (4,081)            (4,486)            2,566
                                    --------           --------           -------
Total federal income taxes            57,268             48,177            43,482
                                    --------           --------           -------
State income taxes:
 Current                              12,128             11,360             9,032
Deferred                                (864)            (1,008)              169
                                    --------           --------           -------
Total state income taxes              11,264             10,352             9,201
                                    --------           --------           -------
Total provision                     $ 68,532           $ 58,529           $52,683
                                    --------           --------           -------
</TABLE>

The Corporation's effective income tax rate varied from the statutory United
States' income tax rate because of the following permanent tax differences:

<TABLE>
<CAPTION>

years ended December 31,                1999               1998              1997
                                        ----               ----              ----
<S>                                     <C>                <C>               <C>
Statutory tax rate                      35.0%              35.0%             35.0%
Increase (reduction)
 resulting from:
Effect of statutory depletion           (6.4)              (6.6)             (5.8)
State income taxes                       3.8                3.9               4.0
Other items                              2.9                1.3               1.6
                                        ----               ----              ----
Effective tax rate                      35.3%              33.6%             34.8%
                                        ----               ----              ----
</TABLE>

The principal components of the Corporation's deferred tax assets and
liabilities at December 31 are as follows:

                                         Deferred Assets (Liabilities)
<TABLE>
<CAPTION>
(add 000)                                    1999                1998
- ---------                                --------           ---------
<S>                                     <C>                 <C>
Property, plant and equipment           $ (85,609)          $ (77,954)
Employee benefits                          21,395              15,159
Financial reserves                          7,549               7,436
Other items, net                           (3,293)             (1,286)
                                         --------           ---------
Total                                   $ (59,958)          $ (56,645)
                                         --------           ---------
</TABLE>


Deferred income taxes on the consolidated balance sheet reflect the net tax
effects of temporary differences between the carrying amounts of assets and
liabilities for financial reporting purposes and the amounts used for income
tax purposes. The Corporation does not believe a valuation allowance is
required at December 31, 1999 or 1998.

The Corporation's total income tax payments were $71,644,000, $59,466,000 and
$54,181,000, respectively, during the years ended December 31, 1999, 1998 and
1997.

NOTE I: RETIREMENT PLANS, POSTRETIREMENT AND POSTEMPLOYMENT BENEFITS

DEFINED BENEFIT PLANS. The Corporation sponsors a number of noncontributory
defined benefit retirement plans, covering substantially all employees. The
assets of the Corporation's retirement plans are held in the Corporation's
Master Retirement Trust and are invested principally in commingled funds. The
underlying investments are invested in listed stocks and bonds and cash
equivalents. Defined benefit plans for salaried employees provide benefits
based on each employee's years of service and average compensation for a
specified period of time before retirement. Defined retirement plans for hourly
employees generally provide benefits of stated amounts for specified periods of
service.

PAGE 20  MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

<PAGE>   12
The Corporation's defined benefit pension plans comply with two principal
standards: the Employee Retirement Income Security Act of 1974, as amended
("ERISA"), which, in conjunction with the Internal Revenue Code, determines
legal minimum and maximum deductible funding requirements, and Statement of
Financial Accounting Standards No. 87, Employers Accounting for Pensions ("FAS
87") and Statement of Financial Accounting Standards No. 132, Employers'
Disclosures About Pensions and Other Postretirement Benefits, which establish
rules for financial accounting and reporting. When any funded plan exceeds the
full-funding limits of ERISA, no contribution is made to that plan. FAS 87
specifies that certain key actuarial assumptions be adjusted annually to reflect
current, rather than long-term, trends in the economy.

It is the Corporation's funding policy to stabilize annual contributions with
assumptions selected on the basis of expected long-term trends. The net
periodic pension benefit cost of defined benefit plans included the following
components:

<TABLE>
<CAPTION>
years ended December 31
(add 000)                               1999               1998              1997
- ---------                           --------           --------           -------
<S>                                 <C>                <C>                <C>
Components of net periodic
 benefit cost:
Service cost                        $  7,578           $  5,965           $ 5,039
Interest cost                         10,071              9,231             8,245
Expected return on assets            (12,946)           (11,454)           (9,598)
Amortization of:
 Prior service cost                      531                512               537
 Actuarial gain                         (485)              (464)             (648)
Transition asset                        (357)              (331)             (360)
                                    --------           --------           -------
Net periodic benefit cost           $  4,392           $  3,459           $ 3,215
                                    --------           --------           -------
</TABLE>

Weighted-average assumptions used as of December 31 are as follows:

<TABLE>
<CAPTION>
                                        1999               1998              1997
                                        ----               ----              ----
<S>                                     <C>                <C>               <C>
Discount rates                          8.00%              6.75%             7.25%
Rate of increase in future
 compensation levels                    5.00%              5.00%             5.50%
Expected long-term rate
 of return on assets                    9.00%              9.00%             9.00%
</TABLE>

The following table sets forth the defined benefit plans' change in benefit
obligations, change in plan assets, funded status and amounts recognized in the
respective consolidated balance sheet as of:

<TABLE>
<CAPTION>
years ended December 31
(add 000)                                    1999                1998
- ---------                               ---------           ---------
<S>                                     <C>                 <C>
Change in benefit obligations:
Net obligation at beginning of year     $ 144,109           $ 125,973
Service cost                                7,578               5,965
Interest cost                              10,071               9,231
Actuarial (gain)/loss                     (26,718)              4,473
Acquisitions/divestitures                   1,216               4,600
Gross benefits paid                        (5,587)             (6,133)
                                        ---------           ---------
Net benefit obligation at
end of year                             $ 130,669           $ 144,109
                                        ---------           ---------
</TABLE>

<TABLE>
<CAPTION>
years ended December 31
(add 000)                                    1999                1998
- ---------                               ---------           ---------
<S>                                     <C>                 <C>
Change in plan assets:
Fair value of plan assets
  at beginning of year                  $ 147,187           $ 130,345
Actual return on plan assets, net          27,291              20,180
Acquisitions                                   --               2,600
Employer contributions                         52                 195
Gross benefits paid                        (5,587)             (6,133)
                                        ---------           ---------
Fair value of plan assets
at end of year                          $ 168,943           $ 147,187
                                        ---------           ---------
</TABLE>

<TABLE>
<CAPTION>
December 31
(add 000)                                    1999                1998
- ---------                               ---------           ---------
<S>                                     <C>                 <C>
Funded status of the plan
 at end of year                         $  38,274           $   3,078
Unrecognized net actuarial gain           (63,003)            (21,998)
Unrecognized prior service cost             4,130               4,661
Unrecognized net transition asset            (748)             (1,105)
                                        ---------           ---------
Accrued benefit cost                    $ (21,347)          $ (15,364)
                                        ---------           ---------
</TABLE>

<TABLE>
<CAPTION>
December 31
(add 000)                                    1999                1998
- ---------                               ---------           ---------
<S>                                     <C>                 <C>
Amounts recognized in the
 consolidated balance sheet
 consist of:
Prepaid benefit cost                    $     118           $     101
Accrued benefit cost                      (21,465)            (15,465)
                                        ---------           ---------
Net amount recognized
at end of year                          $ (21,347)          $ (15,364)
                                        ---------           ---------
</TABLE>

The projected benefit obligation, accumulated benefit obligation and fair value
of plan assets for pension plans with accumulated benefit obligations in excess
of plan assets were $3,900,000, $2,478,000 and $0, respectively, as of December
31, 1999,and $3,124,000, $1,375,000 and $0, respectively,as of December 31,
1998.

POSTRETIREMENT BENEFITS. The Corporation provides other
postretirement benefits including medical benefits for retirees
and their spouses (and Medicare Part B reimbursement for


        MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES   PAGE 21

<PAGE>   13


certain retirees) and retiree life insurance. The net periodic postretirement
benefit cost of postretirement plans included the following components:

<TABLE>
<CAPTION>
years ended December 31
(add 000)                               1999               1998              1997
- ---------                           --------           --------           -------

<S>                                 <C>                <C>                <C>
Components of net periodic
 benefit cost:
Service cost                        $  2,738           $  1,732           $ 1,360
Interest cost                          3,782              4,034             3,539
Expected return on assets                (35)              (121)             (246)
Amortization of:
 Prior service cost                      (35)                25                36
Actuarial gain                          (419)               (85)             (372)
                                    --------           --------           -------
Net periodic benefit cost           $  6,031           $  5,585           $ 4,317
                                    --------           --------           -------
</TABLE>

The postretirement health care plans' change in benefit obligation, change in
plan assets, funded status and amounts recognized in the Corporation's
consolidated balance sheet are as follows:

<TABLE>
<CAPTION>
years ended December 31
(add 000)                                    1999                1998
- ---------                               ---------           ---------

<S>                                     <C>                 <C>
Change in benefit obligations:
Net benefit obligation at
 beginning of year                      $  62,381           $  52,158
Service cost                                2,738               1,732
Interest cost                               3,782               4,034
Participants' contribution                     31                 164
Plan amendments                            (6,410)                 --
Actuarial (gain)/loss                     (13,208)              6,713
Gross benefits paid                        (2,879)             (2,420)
                                        ---------           ---------
Net benefit obligation
at end of year                          $  46,435           $  62,381
                                        ---------           ---------
</TABLE>

<TABLE>
<CAPTION>
years ended December 31
(add 000)                                    1999                1998
- ---------                               ---------           ---------

<S>                                     <C>                 <C>
Change in plan assets:
Fair value of plan assets
 at beginning of year                   $     578           $   2,926
Actual return on plan assets, net              15                 (92)
Participants' contributions                    31                 164
Gross benefits paid                          (624)             (2,420)
                                        ---------           ---------
Fair value of plan assets
at end of year                          $       0           $     578
                                        ---------           ---------
</TABLE>

<TABLE>
<CAPTION>
December 31
(add 000)                                    1999                1998
- ---------                               ---------           ---------

<S>                                     <C>                 <C>
Funded status of the plan
 at end of year                         $ (46,435)          $ (61,803)
Unrecognized net actuarial
 (gain)/loss                              (10,469)              2,270
Unrecognized prior service cost            (5,918)                456
                                        ---------           ---------
Accrued benefit cost                    $ (62,822)          $ (59,077)
                                        ---------           ---------
</TABLE>

<TABLE>
<CAPTION>
December 31
(add 000)                                    1999                1998
- ---------                               ---------           ---------

<S>                                     <C>                 <C>
Amounts recognized in the
 consolidated balance sheet
 consist of:
Accrued benefit cost                    $ (62,822)          $ (59,077)
                                        ---------           ---------
Net amount recognized
at end of year                          $ (62,822)          $ (59,077)
                                        ---------           ---------
</TABLE>

Weighted-average assumptions used as of December 31 are as follows:

<TABLE>
<CAPTION>
                                        1999               1998              1997
                                        ----               ----              ----
<S>                                     <C>                <C>               <C>
Discount rate                           8.00%              6.75%             7.25%
Expected long-term rate
 of return on assets                    9.00%              9.00%             9.00%
</TABLE>

The assumed trend rate for health care inflation used in measuring the net
periodic benefit cost and benefit obligation is 8% for 1999, declining to 4.5%
in 2004 and remaining at that level thereafter. The assumed health care trend
rate has a significant impact on the amounts reported. A one-percentage point
change in the assumed health care trend rate would have the following effects
at December 31, 1999:

<TABLE>
<CAPTION>
                                              One Percentage Point
(add 000)                                 Increase          (Decrease)
- ---------                                 --------          ----------

<S>                                     <C>                 <C>
Total service and interest cost
  components                            $     506           $    (416)
Postretirement benefit obligation       $   4,811           $  (4,041)
</TABLE>

In November 1999, the Corporation amended its postretirement medical benefits
to, among other things, realign the maximum annual medical benefits available
to retirees, modify the retiree premium schedules and limit future retiree
participation.

DEFINED CONTRIBUTION PLANS. The Corporation maintains two defined contribution
plans, which cover substantially all employees. These plans, intended to be
qualified under Section 401(a) of the Internal Revenue Code, are retirement
savings and investment plans for the Corporation's salaried and hourly
employees. The employees of Redland Stone participate in a separate defined
contribution plan established prior to the Corporation's acquisition. The
Corporation will continue to support the existing plan in the near term. Under
certain provisions of these 401(k) plans, the Corporation, at established
rates, matches employees' eligible contributions. The Corporation's matching
obligations were $3,144,000 in 1999, $2,381,000 in 1998 and $1,418,000 in
1997.


PAGE 22  MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES
<PAGE>   14
Postemployment Benefits. The Corporation provides certain benefits to former or
inactive employees after employment but before retirement, such as workers'
compensation and disability benefits. The Corporation has accrued
postemployment benefits of $1,734,000 at each of December 31, 1999 and 1998.

NOTE J: STOCK OPTIONS AND AWARD PLANS

In 1994, the shareholders of the Corporation approved an Amended Omnibus
Securities Award Plan (an "Amended Omnibus Plan") that provided authorization
for the Corporation to repurchase 2,000,000 shares of the Corporation's Common
Stock for issuance under the Amended Omnibus Plan. On May 8, 1998, the
repurchase authorization was decreased to approximately 1,007,000 shares, which
represented the aggregate number of shares that were subject to grants made
through May 8, 1998. The shareholders approved, on May 8, 1998, the Martin
Marietta Materials, Inc. Stock-Based Award Plan (the "Plan"), as amended from
time to time (collectively the "Plans", along with the "Amended Omnibus
Plan"). In connection with the Plan, the Corporation was authorized to
repurchase up to 5,000,000 shares of the Corporation's Common Stock for
issuance under the Plan.

Under the Plans, the Corporation grants options to employees to purchase its
common stock at a price equal to the market value at the date of grant. These
options become exercisable in three equal annual installments beginning one
year after date of grant and expire ten years from such date. The Plans allow
the Corporation to provide for financing of purchases, subject to certain
conditions, by interest-bearing notes payable to the Corporation. However, the
Corporation has provided no such financing.

Additionally, an incentive stock plan has been adopted under the Plans whereby
certain participants elect to use up to 50% of their annual incentive
compensation to acquire shares of the Corporation's common stock at a 20%
discount to the market value on the date of the incentive compensation award.
Certain executive officers are required to participate in the incentive stock
plan at certain minimum levels. Stock unit awards, representing 32,648 shares
for 1999, 22,905 shares for 1998 and 28,029 shares for 1997 of the
Corporation's common stock, were awarded under the incentive stock plan. Such
awards are granted in the subsequent year. Under the awards outstanding,
participants earn the right to acquire their respective shares at the
discounted value generally at the end of a three-year period of additional
employment from the date of award. All rights of ownership of the common stock
convey to the participants upon the issuance of their respective shares at the
end of the ownership-vesting period.

The Plan provides that each non-employee director receives 1,500 non-qualified
stock options annually. The Corporation grants the non-employee directors
options to purchase its common stock at a price equal to the market value at
the date of grant. These options become exercisable in one year from the grant
date assuming completion of the service year by the non-employee director and
expire ten years from such date.

A summary of the Corporation's stock-based plans' activity and related
information follows:

<TABLE>
<CAPTION>
                                          Number of Shares
                                   ------------------------------
                                   Available               Awards    Weighted-Avg.
                                   for Grant          Outstanding   Exercise Price
                                   ---------          -----------   --------------
<S>                                <C>                    <C>             <C>
December 31, 1996                  1,317,141              682,859         $  21.96
Granted                             (315,327)             315,327         $  34.10
Exercised                                 --              (10,030)        $  21.33
Terminated                             2,334               (2,334)        $  25.57
                                   ---------            ---------         --------
December 31, 1997                  1,004,148              985,822         $  25.84
Additions                          5,000,000                   --               --
Authorization
 decrease                           (993,000)                  --               --
Granted                             (360,779)             360,779         $  46.31
Exercised                                 --             (165,612)        $  21.09
Terminated                             7,166               (7,166)        $  30.17
                                   ---------            ---------         --------
December 31, 1998                  4,657,535            1,173,823         $  32.78
GRANTED                             (433,155)             433,155         $  48.20
EXERCISED                                 --             (124,938)        $  22.53
TERMINATED                             7,912               (7,912)        $  37.56
                                   ---------            ---------         --------
DECEMBER 31, 1999                  4,232,292            1,474,128         $  38.15
                                   =========            =========         ========
</TABLE>

Approximately 712,000,519,000 and 411,000 outstanding awards were exercisable
at December 31, 1999, 1998 and 1997, respectively. Exercise prices for awards
outstanding as of December 31, 1999, ranged from $20.00 to $63.44. The
weighted-average remaining contractual life of those awards is 7.7 years. The
weighted-average exercise price of outstanding exercisable awards at December
31, 1999, is $29.85.

In 1996,the Corporation adopted the Shareholder Value Achievement Plan to award
shares of the Corporation's common stock to key senior employees based on
certain common stock performance criteria over a long-term period. Under the
terms of this plan, 250,000 shares of common stock are reserved for grant.
Stock units potentially representing 16,791 and 24,324 shares of the
Corporation's com-


          MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 23


<PAGE>   15


mon stock were granted under this plan in 1999 and 1998, respectively. The
Corporation issued 10,872 net shares of common stock to key senior employees in
January 2000 representing stock unit awards granted for 1997.

Also, the Corporation adopted the Amended and Restated Common Stock Purchase
Plan for Directors, which provides non-employee directors the election to
receive all or a portion of their total fees in the form of the Corporation's
common stock. Under the terms of this plan, 50,000 shares of common stock are
reserved for issuance. Currently, directors are required to defer at least 30%
of the retainer portion of their fees in the form of common stock. Directors
elected to defer portions of their fees representing 3,551 and 6,328 shares of
the Corporation's common stock under this plan during 1999 and
1998, respectively.

Pro forma information regarding net income and earnings per share is required
by FAS 123, which also requires that the information be determined as if the
Corporation had accounted for its employee stock options and other stock-based
awards and grants subsequent to December 31, 1994, under the fair value method
prescribed by FAS 123. The fair value for these stock-based plans was estimated
as of the date of grant using a Black-Scholes valuation model with the
following weighted-average assumptions as of December 31:

<TABLE>
<CAPTION>

                             1999         1998       1997
                           --------      -------   --------
<S>                         <C>          <C>        <C>
Risk-free interest rate       6.20%        5.40%      6.40%
Dividend yield                1.40%        1.80%      1.70%
Volatility factor            27.70%       17.90%     20.40%
Expected life               7 years      7 years    7 years
</TABLE>

The Black-Scholes valuation model was developed for use in estimating the fair
value of traded awards which have no vesting restrictions and are fully
transferable. In addition, valuation models require the input of highly
subjective assumptions, including the expected stock price volatility factor.
Because changes in the subjective input assumptions can materially affect the
fair value estimate, in management's opinion, the existing models do not
necessarily provide a reliable single measure of the fair value of its
stock-based plans.

For purposes of pro forma disclosure, the estimated fair value of the
stock-based plans is amortized hypothetically over the vesting period of the
related grant or award. The Corporation's pro forma information for the years
ended December 31 is as follows:

<TABLE>
<CAPTION>
(add 000, except per share)                 1999           1998        1997
- --------------------------------         -----------------------------------
<S>                                       <C>            <C>         <C>
Basic earnings per common share:
   Net earnings                           $122,791       $113,658    $97,557
   Earnings per share                     $   2.63       $   2.45    $  2.12

Diluted earnings per
 common share:
   Net earnings                           $122,791       $113,343    $97,072
   Earnings per share                     $   2.62       $   2.43    $  2.10

</TABLE>

NOTE K: LEASES

Total rent expense for all operating leases was $26,761,000, $23,460,000 and
$19,700,000 for the years ended December 31, 1999,1998 and 1997, respectively.
The Corporation's operating leases generally contain renewal and/or purchase
options with varying terms. Total mineral royalties for all leased properties
were $23,482,000, $19,988,000 and $17,750,000 for the years ended December 31,
1999,1998 and 1997, respectively. Future minimum rental and royalty commitments
for all non-cancelable operating leases and royalty agreements as of December
31, 1999, are as follows:

<TABLE>
<CAPTION>
           (add 000)
- -----------------------
           <S>                                     <C>
           2000                                    $   8,915
           2001                                        6,767
           2002                                        5,252
           2003                                        4,113
           2004                                        3,353
           Thereafter                                 41,575
                                                ------------
           Total                                   $  69,975
                                                ------------
</TABLE>

NOTE L: SHAREHOLDERS' EQUITY

The authorized capital structure of Martin Marietta Materials, Inc., includes
10,000,000 shares of preferred stock with par value of $0.01 a share, none of
which is issued currently; however, 100,000 shares of Class A Preferred Stock
have been reserved in connection with the Corporation's Shareholders' Rights
Plan. In addition, the capital structure includes 100,000,000 shares of common
stock, with a par value of $0.01 a share. As of December 31, 1999 and
1998, there were approximately 46,715,000 and 46,621,000 shares, respectively,
of the Corporation's common stock issued and outstanding. Approximately
8,307,000 common shares have been reserved for issuance under benefit and
stock-based incentive plans.


PAGE 24 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES


<PAGE>   16


In 1999, the Corporation repurchased 322,300 shares of its common stock at
public market prices at various purchase dates. The repurchase of shares was
authorized under the Corporation's stock-based award plans' authorizations (see
Note J). There were no shares repurchased in 1998 or 1997. Further, during
1999, the Corporation issued 311,100 restricted shares of common stock as part
of an acquisition (see Management's Discussion and Analysis of Financial
Condition and Results of Operations, page 37).

Under the North Carolina Business Corporation Act, shares of common stock
reacquired by a corporation constitute unissued shares. For financial reporting
purposes, reacquired shares are recorded as reductions to issued common stock
and to additional paid-in capital.

NOTE M: COMMITMENTS AND CONTINGENCIES

The Corporation is engaged in certain legal and administrative proceedings
incidental to its normal business activities. While it is not possible to
determine the ultimate outcome of those actions at this time, in the opinion of
management and counsel, it is unlikely that the outcome of such litigation and
other proceedings, including those pertaining to environmental matters (see
Note A and Management's Discussion and Analysis of Financial Condition and
Results of Operations, page 39), will have a material adverse effect on the
results of the Corporation's operations or on its financial position.

ENVIRONMENTAL MATTERS. The Corporation's operations are subject to and affected
by federal, state and local laws and regulations relating to the environment,
health and safety and other regulatory matters. Certain of the Corporation's
operations may, from time to time, involve the use of substances that are
classified as toxic or hazardous within the meaning of these laws and
regulations. Environmental operating permits are, or may be, required for
certain of the Corporation's operations and such permits are subject to
modification, renewal and revocation. The Corporation regularly monitors and
reviews its operations, procedures and policies for compliance with these laws
and regulations. Despite these compliance efforts, risk of environmental
liability is inherent in the operation of the Corporation's businesses, as it
is with other companies engaged in similar businesses, and there can be no
assurance that environmental liabilities will not have a material adverse
effect on the Corporation in the future.

The Corporation currently has no material provisions for estimated costs in
connection with expected remediation costs or other environmental-related
expenditures because it is impossible to quantify the impact of all actions
regarding environmental matters, particularly the extent and cost of future
remediation and other compliance efforts. However, in the opinion of
management, it is unlikely that any additional liability the Corporation may
incur for known environmental issues or compliance with present
environmental-protection laws would have a material adverse effect on the
Corporation's consolidated financial position or on its results of operations
(see Note A and Management's Discussion and Analysis of Financial Condition and
Results of Operations on page 39).

LETTERS OF CREDIT. The Corporation has entered into a standby letter of credit
agreement relating to workers' compensation self-insurance requirements. At
December 31, 1999, the Corporation had a contingent liability on this
outstanding letter of credit of approximately $6,700,000.


          MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 25


<PAGE>   17


MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
CONDITION AND RESULTS OF OPERATIONS

Martin Marietta Materials, Inc. ("Martin Marietta Materials" or the
"Corporation"), is the nation's second largest producer of construction
aggregates and a leading producer of magnesia-based chemicals, refractories and
dolomitic lime products, used in a wide variety of industries. The discussion
and analysis that follows reflects management's assessment of the financial
condition and results of operations of Martin Marietta Materials and should be
read in conjunction with the audited consolidated financial statements on pages
12 through 25.

BUSINESS COMBINATIONS

In 1999, the Corporation completed ten transactions, excluding its new
technology investment in Industrial Microwave Systems, for a combined $77.1
million in cash, stock and certain other consideration, that strategically
expanded its aggregates, asphalt and ready mixed concrete businesses in Texas,
Tennessee, Louisiana, Arkansas, West Virginia, Mississippi and Alabama. Of the
ten transactions, two are particularly noteworthy. In Texas, the Corporation
began serving the Dallas/Fort Worth area through the purchase of Marock, Inc.
The Marock acquisition included a limestone quarry and a sand and gravel
operation with annual production capacity of 4.5 million tons. The purchase
also included three asphalt plants with annual capacity of 700,000 tons. The
Corporation also acquired L.J. Earnest, Inc., with operations in Shreveport,
Louisiana, and Texarkana, Arkansas. L.J. Earnest operates a major aggregates
distribution yard, to which the Corporation was supplying aggregates via rail
from Arkansas; three asphalt plants with annual capacity in excess of 800,000
tons; and two ready mixed concrete plants. L.J. Earnest is also a major
road-paving contractor in Louisiana and Arkansas. Vertical integration -- that
is, owning and operating facilities that use materials from the company's
quarries -- is more common in the industry as the Corporation continues its
expansion west of the Mississippi River. While management has no current plan
to become a significant participant in the road-paving industry, the
Corporation will continue to look selectively at acquisitions, like L.J.
Earnest, that are complementary to the aggregates business.

The ten acquisitions in 1999 were accounted for under the purchase method of
accounting, and the operating results of the businesses acquired were included
with those of the Corporation from the acquisition dates forward. The Liquidity
and Cash Flow discussion, which follows, outlines the impact of these
acquisitions on financing and investing activities. During 1999,the Corporation
finalized the purchase price allocation related to its acquisition of Redland
Stone Products Company ("Redland Stone"). The Redland Stone acquisition,
completed on December 4, 1998, for $272 million in cash plus normal balance
sheet liabilities, subject to certain post-closing adjustments in working
capital, and $8 million estimated for certain other assumed liabilities and
transaction costs, has been included in operating results since the acquisition
date. The post-closing adjustments related to working capital and other
fair-value adjustments were finalized without a significant impact on the
preliminary purchase price allocation.

Costs in excess of net assets acquired ("goodwill") represent the excess of
the purchase price paid for acquired businesses over the estimated fair value
of identifiable assets and liabilities. The carrying value of goodwill is
reviewed if the facts and circumstances indicate potential impairment. If this
review indicates that the carrying value of goodwill will not be recoverable,
as determined based on estimated discounted cash flows of the business acquired
over the remaining amortization period, goodwill is reduced by the estimated
shortfall of cash flows. Goodwill is as follows at December 31:

<TABLE>
<CAPTION>

          Costs in Excess of     % of Total   % of Shareholders'
         Net Assets Acquired       Assets           Equity
         -------------------     ----------   ------------------

            (in millions)
<S>      <C>                     <C>          <C>
1999            $375.3             21.5%            48.5%
1998            $348.0             21.9%            52.1%
</TABLE>

RESULTS OF OPERATIONS

The Corporation's Aggregates division's business is characterized by a high
level of dependence on construction-sector spending; and the Magnesia
Specialties product lines, particularly refractories and dolomitic lime
products, are used principally within the steel industry. Therefore, the
Corporation's operating results are highly dependent upon activity within the
construction and steel-related marketplaces, both of which are subject to
interest rate fluctuations and economic cycles within the public and private
business sectors. Factors such as sea-

PAGE 26 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES


<PAGE>   18


sonal and other weather-related conditions also affect the Corporation's
business production schedules and levels of profitability. Accordingly, the
financial results for a particular year, or year-to-year comparisons of
reported results, may not be indicative of future operating results. Further,
the Corporation's sales and earnings are predominantly derived from its
Aggregates division. The following comparative analysis and discussion should
be read in that context.

The Corporation's 1999 net earnings of $125.8 million, or $2.68 per diluted
share, represent an increase of 9% over 1998 net earnings of $115.6 million, or
$2.48 per diluted share. The 1998 net earnings were 17% higher than 1997 net
earnings of $98.5 million, or $2.13 per diluted share. The Corporation's
consolidated net sales of $1.259 billion in 1999 represent an increase of
$201.1 million, or 19%,over 1998 net sales of $1.058 billion. The 1997
consolidated net sales were $900.9 million. Consolidated earnings from
operations were $215.3 million in 1999 and $196.6 million in 1998, reflecting
an increase of $18.7 million, or 10%, in 1999 and $33.8 million, or 21%,in
1998, both over the prior year. The Corporation's 1997 operating earnings were
$162.8 million.

In 1999, the Corporation's results reflected the impact of weather-related
events, changing agricultural and commercial construction demand, positive
performance from the recently acquired Redland Stone and nonrecurring other
income. Hurricane Floyd, and two other hurricanes that occurred in the third
and fourth quarters, most significantly affected the Corporation's operations
in its largest production state, North Carolina. Historic levels of flooding in
North Carolina left seven quarries temporarily inoperable after the hurricanes.
However, by the end of the year, all quarries had resumed normal operations.
During this period, Hurricane Floyd continued to impact the level of sales in
North Carolina, as well as increase production and transportation costs.
Certain storm-related property damage and business interruption costs may be
recovered under the Corporation's insurance program. Certain of these amounts
were recorded as receivables at year end. Further, five weeks of unusually wet
weather in the Midwest and Southeast during the second quarter of 1999 also
contributed to relatively flat year-over-year volume at heritage operations and
rising production costs.

The agricultural economy in the Midwest began to decline during the year and
significantly affected performance during the third quarter, as farm commodity
prices reached record low levels. Sales of agricultural-use lime and base road
stone declined in Iowa, the Corporation's fourth largest production state.
However, United States' federal government agricultural subsidies late in the
year partially offset the decline in these product areas. Weaker-than-expected
demand in commercial construction in the central region of the United States
had further impact on the Corporation's performance during 1999.

Acquisitions, particularly Redland Stone, somewhat mitigated the impact of
weather-related events and changing agricultural market and commercial
construction demand. The Texas Department of Transportation was one of the
country's leaders in utilizing federal-aid highway funds under the
Transportation Equity Act for the 21st Century ("TEA-21"),with a backlog of
engineered and approved projects awaiting funding. Favorable market conditions
were experienced for all product lines as dry weather conditions in 1999
provided Redland Stone with the opportunity to work through a backlog of
projects created from significant flooding in late 1998.

The Corporation's operating performance was negatively affected by declining
sales and earnings in its Magnesia Specialties division. The division's sales
and earnings continued to reflect the weak economic performance of the steel
industry. Operating results were further reduced as management slowed
production rates to better match production to declining sales volume.

The Corporation's operating margin of 17.1% in 1999 declined from 18.6% in
1998, primarily as a result of hurricane- and other weather-related costs and
lower volumes at heritage aggregates operations (which exclude acquisitions
that have not been included in prior-year operations for a full year). Lower
margin asphalt, ready mixed and paving operations associated with certain
acquisitions, along with Magnesia Specialties' declining results, also
contributed to the operating margin reduction.


          MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 27


<PAGE>   19

Other income and expenses, net, for the year ended December 31, 1999, was $18.4
million in income, compared to income of $1.3 million and $5.3 million in 1998
and 1997, respectively. In addition to other offsetting amounts, other income
and expenses, net, is comprised generally of interest income, gains and losses
associated with the disposition of certain assets, gains and losses related to
certain accounts receivable, income from nonoperating services, costs
associated with the commercialization of certain new technologies, and net
equity earnings from nonconsolidated investments. In 1999, other income and
expenses, net, includes nonrecurring settlements from antitrust claims and a
higher-than-normal level of planned property sales, both principally relating
to the Aggregates division. Further, beginning in the third quarter of
1999, income from certain nonoperating services was recorded as operating
income, as the activities associated with these services became a recurring
feature of business operations. The prospective classification between
operating and nonoperating income did not materially affect operating earnings.

[GRAPH]

   1999 Aggregates Division Markets

      48% Infrastructure
      17% Residential
      28% Commercial
       7% Chemical, Railroad Ballast & Other


Interest expense for the year ended December 31, 1999,was $39.4 million. This
represents an increase of $15.7 million, or 66%,in 1999 over 1998. Interest
expense was $23.8 million in 1998,an increase of $6.9 million, or 41%, over
1997 interest expense of $16.9 million. The increased interest expense in 1999
results primarily from the full-year impact of borrowings to finance the
acquisition of Redland Stone. The interest expense increase from 1998,as
compared to 1997, resulted primarily from additional borrowings to finance the
acquisition of Redland Stone, coupled with the full-year impact of borrowings
to finance the acquisition of American Aggregates Corporation ("American
Aggregates"), which was consummated in May 1997.

The Corporation's effective income tax rate for 1999 was 35.3%,compared with
33.6% in 1998 and 34.8% in 1997. The variance in the effective income tax rates
for these years, when compared to the federal corporate tax rate of 35%,is due
to the effect of several factors. In this regard, the Corporation's effective
tax rates for these years reflect the impact of differences in financial and
tax accounting arising from the net permanent benefit associated with the
depletion allowances for mineral reserves, nondeductible amortization of
certain good-will balances, foreign operating earnings, and earnings from
nonconsolidated investments. As expected, the 1999 effective tax rate increased
as a result of the Redland Stone acquisition, principally from the amortization
of nondeductible goodwill.

The Corporation's debt-to-capitalization ratio decreased from 48% at December
31, 1998,to 45% at December 31, 1999, with total debt, including commercial
paper obligations, increasing from $617.8 million to $641.7 million, and
shareholders' equity increasing from $667.7 million to $774.0 million. During
1999,the Corporation paid common stock dividends of $24.3 million, or $0.52 per
common share. Additional information regarding the Corporation's debt and
capital structure is contained in Note F to the audited financial statements on
page 19 and under "Liquidity and Cash Flows" and "Capital Structure and
Resources" on pages 36 through 39.

BUSINESS ENVIRONMENT

The Corporation's principal lines of business include Martin Marietta
Aggregates, which primarily serves commercial customers in the construction
aggregates-related markets, and Martin Marietta Magnesia Specialties, which
manufactures and markets magnesia-based products and dolomitic lime,
principally for use in the steel industry. These businesses are strongly
affected by activity within the construction and steel-related marketplaces,
respectively, both of which represent industries that are cyclical in nature.

The Aggregates division markets its products primarily to the construction
industry, with approximately half of its aggregates


PAGE 28 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES


<PAGE>   20

shipments made to contractors in connection with highway and other public
infrastructure projects and the balance of its shipments made primarily to
contractors in connection with commercial and residential construction
projects. Accordingly, the Corporation's profitability is sensitive to
national, as well as regional and local, economic conditions, and particularly
to cyclical swings in construction spending. The cyclical swings in
construction spending are affected by fluctuations in interest rates, changes
in the levels of infrastructure funding by the public sector and demographic
and population shifts. Further, the Corporation's asphalt, ready mixed and road
paving operations generally follow trends in the construction industry. Due to
the high level of fixed costs associated with aggregates production, the
Corporation's operating leverage can be substantial.

[GRAPH]


(1) Aggregates Division Capacity
    (in millions of tons)

      1995       117.3
      1996       120.0
      1997       165.8
      1998       222.6
      1999       233.7

    Note: 1999 and 1998 include 25 million tons from the Meridian investment.

(2) United States Aggregates Consumption
    (in millions of tons)

                  Crushed Stone        Sand & Gravel         Total
                  -------------        -------------         -----

      1995           1,389                 1,003             2,392
      1996           1,437                 1,008             2,445
      1997           1,565                 1,046             2,611
      1998           1,664                 1,190             2,854
      1999 (est.)    1,700                 1,211             2,911

While construction spending in the public and private market sectors is
affected by changes in economic cycles, there has been a tendency for the level
of spending for infrastructure projects in the public-sector portion of this
market to be more stable than spending for projects in the private sector.
Governmental appropriations and expenditures are less interest-rate sensitive
than private-sector spending, and generally improved levels of funding have
enabled highway and other infrastructure projects to register improvement over
the past few years. The Corporation believes publicworks projects consumed more
than 50% of the total annual aggregates consumption in the United States during
1999. This has consistently been the trend in construction spending for each
year since 1990. Additionally, since public sector-related shipments account
for almost 50% of the Corporation's 1999 aggregates shipments, the Aggregates
division also enjoys the benefit of the high level of public-works construction
projects. Accordingly, the Corporation's management believes the Corporation's
exposure to fluctuations in commercial and residential, or private sector,
construction spending is lessened somewhat by the division's broad mix of
public sector-related shipments.

Public-sector construction projects are funded through a combination of
federal, state, and local sources, with TEA-21 providing the principal source
of federal funding. Congress passed TEA-21 legislation on June 9, 1998. TEA-21
provides federal transportation funding authorization of $218 billion ($168
billion for highway construction and $50 billion for other programs) over a
six-year period ending in 2003. TEA-21 increases funding by approximately 40%
over the prior federal funding level and increases funding for highway
construction alone by an average of 44%.

In a change from previous legislation, TEA-21 provides a minimum funding
guarantee firewall for the Highway Account of the Highway Trust Fund and
minimum percentage of funding guarantees for each state. TEA-21 requires that
100% of the federal gasoline tax revenues collected be directed into the
Highway Trust Fund as a minimum funding guarantee. However, Congress must
annually appropriate highway funding levels and could choose to fund at a level
below the minimum funding guarantee. Further, TEA-21 includes a revised highway
funding distribution formula that guarantees that each state will receive a
minimum percentage of highway funding, equal to 90.5% of the state's share of
total gasoline tax contributions. Many states in the South are expected to
experience an increase in funding in excess of the 44%

           MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 29
<PAGE>   21
national average as a result of the revised highway funding distribution
formula. Highway construction spending is expected to increase further as state
departments of transportation match, as required, the federal funds received
under TEA-21.

The federal transportation appropriation bill for fiscal 2000 fully funded the
guaranteed highway funding level authorized under TEA-21 of $26.7 billion.
Further, the fiscal 2000 transportation appropriations bill includes an
additional $1.5 billion for guaranteed highway funding. The additional $1.5
billion of guaranteed funding results from the adjustment of TEA-21 Federal-Aid
Highways authorizations as gasoline tax receipt projections were amended to
reflect actual receipts.

However, to balance the federal budget, federal funding for fiscal 2000
appropriations is subject to a 0.38% across-the-board spending reduction
provision for all federal agencies. The spending reduction provides the Clinton
Administration with the flexibility to determine which programs within each
federal agency will be reduced but would prevent any program from being reduced
by more than 15%. TEA-21 transportation appropriations will be reduced by
$105.2 million for fiscal 2000. Further, the 2001 Transportation Budget
released by the Clinton Administration proposes to reallocate a portion of the
additional $3.0 billion of guaranteed highway funding between TEA-21 and
non-TEA-21 transportation programs. These and other potential proposals may
impact the additional funding available for the Highway Fund. There is no
assurance that Congress will continue to follow the TEA-21 legislated minimum
funding guarantee firewall. Management currently believes that reductions in
TEA-21 funding, if any, will not have a significant impact on the Corporation.

The Corporation's six largest production states are expected to experience an
approximately 55% increase in six-year weighted average annual public-works
construction funding under TEA-21 (see graph) as compared to the prior bill. As
expected, TEA-21 did not significantly impact operations in 1999. However,
management expects that the ultimate level of spending for publicworks
construction projects will continue to increase in 2000 as a result of TEA-21.
In the Corporation's survey of transportation departments across its production
states, management reaffirmed its TEA-21 expectations. Those expectations
include that most states are utilizing federal TEA-21 funding obligations, have
the ability to raise the needed matching funds and are experiencing an increase
in highway projects. However, the highway projects are more complex in nature
and require more extensive feasibility, engineering and environmental studies
before letting contracts and beginning construction. Many transportation
departments, based on the survey, are increasing the utilization of consultants
to handle engineering and environmental work for these additional projects.
Therefore, as expected, there is a lag between the appropriation of highway
funds and the actual commencement of construction. Annual highway funds under
all TEA-21 programs are available for obligation within a four-year period,
including the year of appropriation. Once obligated, TEA-21 funds are available
until expended. The Corporation's capital expansion program is focused on
taking advantage of the TEA-21 growth through investment in both permanent and
portable quarrying operations. However, there is no guarantee that the
Corporation will fully benefit from the expected increase in public-works
construction projects.

[GRAPH]

TEA-21 Funding Increases
Six largest Aggregates division production states

      NC             55%
      TX             61%
      OH             37%
      IA             43%
      GA             70%
      IN             52%
      Wtd. Avg.      55%

Because of the Aggregates division's operations in the southeastern,
southwestern, midwestern and central regions of the nation, the division's --
and, consequently, the Corporation's -- operating performance and financial
results depend on the strength of these specific regional economies. In recent
years, the economic growth in these regions of the United States, particularly
in the Southeast and Southwest, has been generally strong. However, if federal
appropriation levels are reduced, if a reduction occurs in state and local
spending, or if the specific regional economies decline, similar to the impact
experienced in the Midwest as a result of a declining agricultural economy, the
Aggregates division could be adversely affected.

PAGE 30 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES
<PAGE>   22
The general economy, spurred by rising business productivity, strong consumer
spending, improving foreign economies and negligible inflation, outside of
certain sectors, has exceeded the previously-set record expansion of 106 months,
which occurred during the 1960's. Further, the Federal Reserve, as a result of
controlled inflation, continues to have the flexibility to adjust monetary
policy and sustain the economic growth curve. Therefore, generally, economists
expect the U.S. economy to continue to grow in 2000 at, or slightly lower than,
the level in 1999. Management believes that the construction industry will
continue to benefit from enhanced public-works construction funding. Management
also expects growth in commercial construction, albeit slower growth than in
1999. However, within the construction industry, the anticipated increases in
public-works and commercial construction could be offset by potential decreases,
triggered by anticipated higher interest rates, in the residential construction
markets. However, as discussed previously, public-works construction spending is
principally driven by the level of gasoline tax revenues and the appropriation
guidelines under TEA-21. As such, the volatility of public-works construction
spending to interest-rate changes is somewhat mitigated.

Currently, management believes the construction industry's overall consumption
levels and the Corporation's heritage production and shipments will grow by 2%
to 4% in 2000. However, there is no assurance that these levels will be achieved
or will continue. Over the next five years, management expects that the
Aggregates division's business and financial results will continue to grow, as a
result of increased infrastructure construction spending generated by
TEA-21,coupled with moderate growth in residential and commercial construction.
Further, the Aggregates division will generally follow national, regional and
local general economic, construction and industry trends.

The aggregates industry expansion and growth is also subject to increasing
challenges from environmental and political advocates who want to control the
pace of future development and preserve open space. Rail and other
transportation alternatives are being supported by these groups as solutions to
mitigate traffic congestion and overcrowding.

The Clean Air Act, originally passed in 1963 and periodically updated by
amendments, is the United States' national air pollution control program that
granted the Environmental Protection Agency ("EPA") the authority to set limits
on the level of various air pollutants. Recently, environmental groups have been
successful in lawsuits against the federal and certain state departments of
transportation, asserting that highway construction should be delayed until the
municipal area is in compliance with the Clean Air Act. For example, during 1999
in the Atlanta, Georgia, metro area, 44 of 61 funded highway projects were
delayed because of nonattainment of air pollutant standards. The EPA lists ten
major metropolitan areas in the Corporation's markets, including Atlanta and
Houston/Galveston, Texas, as nonattainment areas with deadlines to reduce air
pollutants or face fines or control by the EPA. Other environmental groups have
published lists of targeted municipal areas, including areas within the
Corporation's marketplace, for environmental and suburban growth control. The
impact of these initiatives on the Corporation's growth is typically localized,
and further challenges are expected as these initiatives gain momentum.

Seasonal changes and other weather-related conditions on business production
schedules can also significantly affect the aggregates industry. Consequently,
the Aggregates division's production and shipment levels coincide with general
construction activity levels, most of which occur in the division's markets,
typically in the spring, summer and fall. The division's operations that are
concentrated principally in the north central region of the Midwest generally
experience more severe winter weather conditions than the division's operations
in the Southeast and Southwest.

The Corporation's management believes the overall long-term trend for the
construction aggregates industry continues to be one of consolidation. The
Corporation's Board of Directors and management continue to review and monitor
the Corporation's strategic long-term plans. These plans include assessing
business combinations and arrangements with other companies engaged in similar
businesses, building market share in the Corporation's core businesses and
pursuing new technological opportunities that are related to the Corporation's
existing markets.


           MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 31
<PAGE>   23


During 1999,the Corporation expanded its market opportunities by consummating
ten transactions for the acquisition of aggregates, asphalt, ready mixed
concrete or road paving operations, and either opened, or began the process of
opening, three quarry locations - known as greensiting - in the Southeast and
Midwest.

The Corporation's aggregates reserves, including its investment in Meridian
Aggregates Company ("Meridian"), exceed 50 years of production based on current
levels of activity.

Through its Magnesia Specialties division, the Corporation also manufactures and
markets magnesia-based products, including heat-resistant refractories products
for the steel industry and magnesia-based chemicals products for industrial,
agricultural and environmental uses, including wastewater treatment and acid
neutralization. Magnesia Specialties' products, particularly refractories
products and dolomitic lime, which are used within the steel industry, currently
account for approximately 68% of the division's net sales. Accordingly, the
division's profitability is dependent on the production of steel and the related
marketplace, and a significant portion of the division's product pricing
structure is affected by current business economic trends within the steel
industry. Further, due to the high level of fixed costs associated with
production, the division's operating leverage can be substantial.

In 1999, particularly in the second half of the year, the United States' steel
industry began to show signs of improvement. Foreign steel imports that flooded
the United States' markets in 1998 slowed during the year as these foreign
economies began to improve. Although the United States assisted in slowing
foreign imports by reaching agreements with select foreign countries, no broad
tariffs or duties were passed to provide long-term restriction of foreign steel
imports.

[GRAPH]

Raw Steel Production and Imports
(in millions of short tons)

                 North American Production    U.S. Imports         Total
                 -------------------------    ------------         -----

    1995                   134.1                  27.2             161.3
    1996                   136.0                  32.1             168.1
    1997                   138.2                  34.4             172.6
    1998                   140.9                  41.5             182.4
    1999 (est.)            140.7                  35.7             176.4

The Magnesia Specialties division's steel-related products areas' performance
followed the steel industry's performance. Refractories and dolomitic lime
products, as expected, continued to experience declining volumes and sales
during 1999 as a result of instabilities in the steel industry. While
refractories and dolomitic lime volumes and sales improved in the second half of
1999, compared with the second half of 1998, pricing pressures continued as the
steel industry exercised its pricing power. Also, consolidation among
manufacturers of refractory brick may remove a significant periclase customer
from the market in the near term.

The division's chemicals products achieved record volume and sales in 1999 as a
result of increased sales in chemicals used as flame retardants and in
wastewater treatment. The division also added several new customers that utilize
magnesia to reduce stack pollution. Further, improving Asian economies reduced
the global pressures experienced in the chemicals products area during 1998.
However, competitive pricing pressures continued throughout 1999.

As expected, sales and earnings for the division declined in 1999; however,the
second half of 1999 began to show marked improvement compared to the previous
twelve-month period. The division's performance will continue to be directly
tied to the steel industry and, although improving, the absence of federal
restrictions on foreign steel imports continues to weaken prospects for
long-term improvements. Therefore, management expects competitive pressure
within its steel-related products areas to continue throughout 2000. Management
further expects continued growth in its chemicals products in 2000, offset
somewhat by competitive pricing pressures. While management expects sales and
earnings from operations of the Magnesia Specialties division to improve in
2000, management does not expect a full return to 1998's and previous years'
performances. The Corporation continues to explore opportunities, including
possible divestiture of all or part of the Magnesia Specialties division, with a
goal of creating additional value for the Corporation. However, there can be no
assurance that management will continue to pursue these opportunities, if any.


PAGE 32 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES
<PAGE>   24

Approximately 16% of the Magnesia Specialties division's products are sold in
foreign jurisdictions, with no single country accounting for 10% or more of the
division's sales. While the division's products are manufactured and sold
principally in the United States, the division also markets its products in the
Canadian, Mexican, European (principally England and Germany) and Pacific Rim
(primarily Korea) markets. As a result of these foreign market sales, the
division's financial results could be affected by factors such as changes in
foreign currency exchange rates or weak economic conditions in the foreign
markets in which the division distributes its products. To mitigate the
short-term effects of changes in currency exchange rates on the division's
operations, the division principally uses the U.S. dollar as the functional
currency in substantially all foreign transactions. However, adverse general
economic conditions within a foreign market where the Magnesia Specialties
division conducts business could have a negative impact on the division's
results of operations.

To mitigate its exposure to market dependence on the steel industry, the
division's management has taken steps to emphasize new product development and
concentrate on additional products for use in environmental, agricultural and
other industrial applications and transition its existing products toward higher
margin specialty applications.

The four-year union contract for the division's employees at its major operating
facility in Manistee, Michigan, was ratified in August 1999. The union contract
for the division's employees at its Woodville, Ohio, operating facility expires
in June 2000.

The Corporation continued research and development activities during 1999 in
several technological product areas. Composite materials have been used for
bridge deck installation and replacement, and research is continuing in a
variety of other construction-related uses. Management believes that additional
funds for innovative technologies in roadways, from the TEA-21 program, offer
opportunities to put new bridge decks in service and to focus more attention on
the long-life and low-maintenance costs expected from the composite materials.
The Corporation also made an investment in a start-up company in 1999,
Industrial Microwave Systems ("IMS"). IMS has proprietary technology for use in
industrial heating and drying applications, as well as food processing and
aseptic packaging. Commercial viability of these technological product areas is
not assured.

As expected, the Corporation had limited revenue in 1999 for both ECO-MIN(R)
fertilizer, a patented soil remineralization product, and SC27(TM) soil
inoculant, a microbial soil enhancer, both used to enhance plant growth, along
with a laser-measuring device for use in measuring refractory thickness in
steel production furnaces. Further, as expected, these technologies did not
generate profits in 1999. Commercialization of microwave technology, used for
cleaning ready mixed concrete equipment, has been deferred for the near future
as research and development continues. The Corporation will continue to pursue
opportunities that provide proprietary technology in high growth-rate markets
that it understands, that require limited research and development with minimal
capital investment relative to revenue and profit generation potential, and that
have the potential to provide above-average returns while minimizing risk. There
can be no assurance that these technologies can achieve profitability.

Generally, the impact of inflation on the Corporation's businesses has become
less significant with the benefit of continued lower inflation rates in recent
years. However, energy sector inflation affects the cost of transportation and
asphalt production. Wage inflation, triggered by low unemployment and the
resulting increase in labor costs, is somewhat mitigated by increases in
productivity. Generally, when the Corporation incurs higher costs to replace
productive facilities and equipment, increased capacity and productivity and
various other offsetting factors generally counterbalance increased depreciation
costs.

The Corporation's management successfully completed the conversion of its
information technology computer hardware and software and its non-information
technology equipment to enable effective functioning on and after January 1,
2000. The total costs for the year 2000 system conversion were $3.7 million,
$1.1 million in 1999 and $2.6 million in 1998, all funded from operating cash
flows. The Corporation's focus is now directed at replacing its existing systems
with an enterprise-wide information solution. In 2000,the Corporation


           MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 33
<PAGE>   25

expects to complete the needs assessment and system selection. However, system
implementation will take a period of three to five years.

DISCUSSION OF BUSINESS SEGMENTS

The Corporation conducts its operations through two reportable business
segments: Aggregates and Magnesia Specialties. The Aggregates division is the
second largest producer of construction aggregates in the United States. The
Corporation's sales and earnings are predominantly derived from its aggregates
segment which processes and sells granite, sandstone, limestone, sand and gravel
and other aggregates products for use primarily by commercial customers. The
division's products are used principally in domestic construction of highways
and other infrastructure projects and for commercial and residential buildings.
The Aggregates division also includes the operations of its other construction
materials businesses. These businesses, acquired through continued selective
vertical integration by the Corporation, include primarily asphalt, ready mixed
concrete and road paving operations. The Corporation's Magnesia Specialties
division produces refractories materials and dolomitic lime used in domestic and
foreign basic steel production and chemicals products used in domestic and
foreign industrial, agricultural and environmental applications. The magnesia-
based products segment generally derives a major portion of its sales and
earnings from the products used in the steel industry.

The Corporation's evaluation of performance and allocation of resources is based
primarily on earnings from operations. Earnings from operations is total revenue
less operating expenses; selling, general and administrative expenses; and
research and development, and excludes interest expense and other income
(expense). The accounting policies of the reportable segments are the same as
those described in Note A to the audited financial statements on pages 16
through 18. Assets employed by segment include assets directly identified with
those operations. Corporate headquarters' assets consist primarily of cash and
cash equivalents, and property, plant and equipment for corporate operations.
Substantially all debt, and the related interest expense, is held at corporate
headquarters. Property additions include property, plant and equipment that has
been purchased through acquisitions in the amount of $44,747,000 in 1999,
$154,445,000 in 1998 and $174,339,000 in 1997.

The following tables display selected financial data for the Corporation's
reportable business segments for each of the three years in the period ended
December 31,1999.

SELECTED FINANCIAL DATA BY BUSINESS SEGMENT

year ended December 31
(add 000)

<TABLE>
<CAPTION>

NET SALES

                                    1999                1998                1997
                              ----------          ----------          ----------
<S>                           <C>                 <C>                 <C>
Aggregates                    $1,125,636          $  920,767          $  760,702
Magnesia Specialties             133,191             136,924             140,161
                              ----------          ----------          ----------
Total                         $1,258,827          $1,057,691          $  900,863
                              ==========          ==========          ==========
</TABLE>

<TABLE>
<CAPTION>

GROSS PROFIT

                                    1999                1998                1997
                              ----------          ----------          ----------
<S>                           <C>                 <C>                 <C>
Aggregates                    $  283,998          $  249,516          $  202,197
Magnesia Specialties              26,701              32,132              33,072
                              ----------          ----------          ----------
Total                         $  310,699          $  281,648          $  235,269
                              ==========          ==========          ==========
</TABLE>

<TABLE>
<CAPTION>

SELLING, GENERAL AND ADMINISTRATIVE EXPENSES

                                    1999                1998                1997
                              ----------          ----------          ----------
<S>                           <C>                 <C>                 <C>
Aggregates                    $   75,568          $   64,106          $   52,062
Magnesia Specialties              17,053              17,935              17,031
                              ----------          ----------          ----------
Total                         $   92,621          $   82,041          $   69,093
                              ==========          ==========          ==========
</TABLE>


<TABLE>
<CAPTION>

EARNINGS FROM OPERATIONS

                                    1999                1998                1997
                              ----------          ----------          ----------
<S>                           <C>                 <C>                 <C>
Aggregates                    $  208,011          $  184,648          $  148,944
Magnesia Specialties               7,278              11,906              13,826
                              ----------          ----------          ----------
Total                         $  215,289          $  196,554          $  162,770
                              ==========          ==========          ==========
</TABLE>

<TABLE>
<CAPTION>

ASSETS EMPLOYED

                                    1999                1998                1997
                              ----------          ----------          ----------
<S>                           <C>                 <C>                 <C>
Aggregates                    $1,598,948          $1,423,031          $  959,883
Magnesia Specialties             105,362             117,549             115,682
Corporate headquarters            38,264              48,009              30,148
                              ----------          ----------          ----------
Total                         $1,742,574          $1,588,589          $1,105,713
                              ==========          ==========          ==========
</TABLE>

<TABLE>
<CAPTION>

DEPRECIATION, DEPLETION AND AMORTIZATION

                                    1999                1998                1997
                              ----------          ----------          ----------
<S>                           <C>                 <C>                 <C>
Aggregates                    $  114,457          $   89,487          $   70,552
Magnesia Specialties               8,468               8,738               8,716
Corporate headquarters             1,829                 540                 452
                              ----------          ----------          ----------
Total                         $  124,754          $   98,765          $   79,720
                              ==========          ==========          ==========
</TABLE>

<TABLE>
<CAPTION>

PROPERTY ADDITIONS

                                    1999                1998                1997
                              ----------          ----------          ----------
<S>                           <C>                 <C>                 <C>
Aggregates                    $  177,318          $  260,112          $  248,215
Magnesia Specialties               3,942               6,874              11,072
Corporate headquarters             1,307              11,385               1,492
                              ----------          ----------          ----------
Total                         $  182,567          $  278,371          $  260,779
                              ==========          ==========          ==========
</TABLE>

PAGE 34 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES
<PAGE>   26

AGGREGATES. The Aggregates division's sales increased 22% to $1.126 billion for
the year ended December 31,1999, compared with the prior year's sales. This
increase in sales reflects a 15.7 million-ton increase in total aggregates tons
shipped during 1999 to 165.2 million tons. The acquisition of Redland Stone and
other acquisitions made during 1998 and 1999 accounted for all of the increase
in total tons shipped. The division's heritage operations, which exclude
acquisitions that have not been included in prior-year operations for a full
year, experienced pricing improvements during 1999 of approximately 4% in
average net selling price, while the division's overall average net selling
price increased 3.6% when compared with prior year's prices. As in 1998, the
pricing structure in acquired operations reflects lower overall net average
selling prices, principally because of differences in product groups, production
costs, demand and competitive conditions when compared with product sales from
the Corporation's heritage operations.

The division's operating earnings for the full year 1999 increased 13% to $208.0
million from the prior year's earnings from operations of $184.6 million. As
discussed previously in the Results of Operations section of this Management's
Discussion and Analysis, the division's operating earnings for the year
increased principally as a result of the acquisition of Redland Stone, which was
somewhat offset by the impact of weather-related events and weakening
agricultural and commercial construction demand.

For the year ended December 31, 1998 ,the Aggregates division had net sales of
$920.8 million, which were $160.1 million or 21% higher than the 1997 net sales
of $760.7 million. This improvement reflects a 20.4 million-ton increase in
total tons shipped during 1998 to 149.5 million-tons and reflects an increase of
approximately 3% in the division's overall average net selling price when
compared with the prior year's. Earnings from operations in the year were $184.6
million, an increase of 24% over the division's operating earnings for 1997. The
division's operating profits during the year reflected continued record volume,
price increases at heritage locations and growth from acquisitions. 1997
operating results reflect an approximately 4% increase in prices and certain
operating performance improvements both in its heritage operations, as well as
synergies achieved in the acquired businesses, which were offset somewhat by
costs associated with higher levels of greensiting activities during the year.

MAGNESIA SPECIALTIES. For the year ended December 31,1999, the Magnesia
Specialties division had sales of $133.2 million, a decrease of $3.7 million, or
3%,from 1998 sales of $136.9 million. The division's earnings from operations
for 1999 of $7.3 million were down $4.6 million, or 39%,when compared to 1998
earnings from operations of $11.9 million. As discussed earlier, during 1999 the
division continued to feel the effects of poor performance in the steel
industry. The division's steel-related products areas experienced declining
volumes and competitive pricing pressures that continued to depress 1999 sales
and earnings. In spite of global pricing pressures, the division's chemicals
products achieved record volume and net sales and achieved strong earnings in
1999. As expected, the division's operating earnings in 1999 were also
negatively affected as production rates were slowed to adjust production levels
to anticipated sales volume. Currently, although selective inventory reductions
continue, management believes it has stabilized its inventory and production
levels.

Magnesia Specialties division's 1998 net sales of $136.9 million were 2% below
the prior year's. The division's operating earnings for 1998 of $11.9 million
were 14% below the 1997 operating earnings. The division experienced softening
in its refractories and dolomitic lime products as a direct result of decreased
steel production from United States mills. While U.S. steel demand was strong,
foreign imports, principally from Japan, Korea, Russia and Brazil, supplied a
substantially increased percentage of U.S. demand. Also, worldwide competition
in the periclase and chemicals products areas intensified. As a result, sales
and operating earnings declined significantly during the year, despite favorable
operations. The division's 1998 operating earnings were also negatively affected
by the operating losses of a calcium carbonate grinding facility that was closed
at the end of the year. The Magnesia Specialties division's 1997 net sales of
$140.2 million were 7% above the prior year. Shipment levels for all of the
division's product lines

           MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 35
<PAGE>   27

increased in 1997 and the division experienced some modest pricing improvements
when compared with the year-earlier period. The division's operating earnings
for 1997 of $13.8 million were 23% over the 1996 operating earnings.


LIQUIDITY AND CASH FLOWS

A primary source of the Corporation's liquidity during the past three years has
been cash generated from its operating activities. Cash provided by its
operations was $223.7 million in 1999, as compared to $222.6 million in 1998 and
$195.6 million in 1997. These cash flows were derived, substantially, from net
earnings before deduction of certain noncash charges for depreciation, depletion
and amortization of its properties and intangible assets, as well as from
changes in operating assets and liabilities.

[GRAPH]

Consolidated Operating Cash Flow
(in millions)

  1995       $128.6
  1996       $134.9
  1997       $195.6
  1998       $222.6
  1999       $223.7

Working capital increases for 1999 included in the above-referenced changes in
operating assets and liabilities, were due primarily to increases in Aggregates
division inventories as a result of expected increases in demand in 2000 and an
increase in accounts receivable balances primarily associated with the increased
level of sales. The 1998 working capital increases included in changes in
operating assets and liabilities reflect an increase in the Magnesia Specialties
division's inventory as a result of strong production in 1998, coupled with
reduced demand in certain product areas, and a decrease in overall trade
accounts payable balances, partially offset by a decrease in accounts receivable
balances resulting from accelerated cash collections. The 1997 working capital
increases included in changes in operating assets and liabilities reflect
increases in accounts receivable balances resulting from increased sales volume
activity, offset by increased trade accounts payable balances and reduction of
inventory balances on hand at the end of the year. In addition to other
offsetting amounts, other assets and liabilities, net, in 1999, changed
principally due to the decline in the rate of increase in certain self-insurance
reserves, as compared to a significant increase in 1998 as a result of
higher-than-average claims.

Net cash used for investing activities was $214.6 million in 1999, a decrease of
$291.3 million from $505.8 million reported in 1998. Of that amount, the
Corporation used $77.1 million for the purchase of ten Aggregates division-
related acquisitions, compared with $347.9 million in 1998 that financed the
acquisition of Redland Stone and nine other acquisitions, and $279.1 million in
1997 that included the acquisition of American Aggregates and eight smaller
acquisitions. Other investing activities in 1999 included the Corporation's 19%
investment in Industrial Microwave Systems and loans to Meridian, among other
things, while the same activities, in 1998, principally included the
Corporation's initial investment in Meridian. Additions to property, plant and
equipment, excluding acquisitions, of $137.8 million, were 11% higher in 1999,
compared with 1998. Comparable full-year capital expenditures were $123.9
million in 1998 and $86.4 million in 1997, with this increase primarily as a
result of the impact of American Aggregates, which was acquired in May 1997, and
capacity expansion projects. The Corporation's acquisition and capital
expenditures reflect planned strategic growth and capital spending activities
that are consistent with management's strategy for investment and expansion
within the consolidating aggregates industry. For the year 1999, the
Corporation's management had anticipated a more significant increase in
property, plant and equipment additions. However, as planned growth in the
heritage operations was delayed due to weather-related conditions and softening
commercial and agricultural markets, management scaled back capacity expansion
to better match the timing of market expansion. Through January 1997, the
Corporation's cash and cash equivalents balances were invested under a cash
management agreement with its former parent, Lockheed Martin Corporation (see
Note A to the audited financial statements on pages 16 through 18). During the
year ended December 31, 1997, the Corporation reduced the balance of cash and
cash equivalents invested with Lockheed Martin Corporation by $23.8 million.


PAGE 36 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES
<PAGE>   28
Approximately $20.3 million of cash was used for financing activities during
1999,compared with $279.2 million and $160.7 million of cash provided by
financing activities in 1998 and 1997,respectively. The Corporation incurred
$14.7 million of net indebtedness in 1999,excluding $9.2 million reflected in
acquisitions, net, principally in connection with the ten acquisitions completed
during the year. The Corporation used cash of $12.7 million during 1999 to
finance the repurchase of 322,300 shares of its common stock at public market
prices at various purchase dates. The repurchase of shares was authorized under
the Corporation's 6.0 million-share authorization from the Board of Directors
for the Stock-Based Award Plan and the Amended Omnibus Securities Award Plan.
There were no shares repurchased in 1998 or 1997. Further, during 1999,the
Corporation issued stock under its stock-based award plans, as well as issuing
approximately 311,100 restricted shares of common stock, along with other
consideration to purchase L.J. Earnest, Inc. Comparable cash provided by
issuance of common stock was $1.9 million in 1998,principally for the
stock-based award plans and an acquisition; and $0.2 million in 1997. Excluding
commercial paper obligations,$9.7 million of long-term debt will mature in 2000.
In 1999,the Board of Directors approved total cash dividends on the
Corporation's common stock of $0.52 a share. Regular quarterly dividends were
authorized and paid by the Corporation at a rate of $0.13 a share.

During 1998,the Corporation incurred $302.3 million of net indebtedness,
principally in connection with the consummation of the Redland Stone
acquisition, which was financed initially through the issuance of United States'
commercial paper. A portion of the commercial paper borrowings was repaid, with
the proceeds obtained from the private placement of 5.875% Notes due December
1,2008,issued in the aggregate principal amount of $200 million. The private
placement borrowings remained outstanding at December 31,1998,and were publicly
registered in 1999. In 1997,the Corporation paid net cash consideration of $242
million for the acquisition of all of the outstanding common stock of American
Aggregates. The sources of funds for this acquisition were a combination of
borrowings under revolving credit facilities and the issuance of commercial
paper. The Corporation subsequently issued $125 million of long-term debt
securities, the net proceeds of which were used to repay amounts outstanding
under the revolving credit agreements and to reduce the amount of commercial
paper outstanding.

CAPITAL STRUCTURE AND RESOURCES

Long-term debt, including current maturities of long-term debt and commercial
paper, increased to $641.7 million at the end of 1999 from $617.8 million at the
end of 1998. Total debt represented approximately 45% of total capitalization at
December 31,1999,compared with 48% at December 31, 1998. The Corporation's debt
is in the form of publicly and privately issued long-term fixed-rate notes and
debentures and United States' commercial paper (see Note F to the audited
consolidated financial statements on page 19). Shareholders' equity grew to
$774.0 million at December 31, 1999,from $667.7 million at December 31,1998.

The Corporation has $450 million in revolving credit facilities, which are
syndicated through a group of commercial domestic and foreign banks, and a
United States commercial paper program with available funds of a comparable
amount. The credit facilities consist of a five-year, unsecured revolving credit
agreement in the amount of $150 million (the "Long-Term Credit Agreement") which
expires in January 2002 and a 364-day unsecured revolving credit agreement in
the amount of $300 million (the "Short-Term Credit Agreement"), which expires in
August 2000 (see Note F to audited consolidated financial statements on page
19).The Corporation's management believes it will be able to amend its
Short-Term Credit Agreement for an additional 364-day period beyond August 2000.

No borrowings were outstanding under either of the revolving credit agreements
at December 31,1999. However, the Long- and Short-Term Credit Agreements support
commercial paper borrowings of $180 million outstanding at December 31,1999,of
which $150 million has been classified as long-term debt on the Corporation's
consolidated balance


           MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 37


<PAGE>   29
sheet, based on management's ability and intention to maintain this debt
outstanding for at least one year. The remaining outstanding commercial paper
of $30 million has been classified as current on the Corporation's consolidated
balance sheet.

As discussed earlier, the Corporation's operations are highly dependent upon
the interest rate-sensitive construction and steelmaking industries.
Consequently, these marketplaces could experience lower levels of economic
activity in an environment of rising interest rates (see "Business Environment"
on pages 28 through 34). Aside from these inherent risks from within its
operations, the Corporation's earnings are affected also by changes in
short-term interest rates, as a result of its outstanding commercial paper
obligations and temporary cash investments, including overnight investments in
Eurodollars. However, management believes that the Corporation's exposure to
short-term interest rate market risk is not material.

Long-term interest rates influence assumptions used to develop the costs for
the Corporation's employee retirement and postretirement benefit plans. The
Corporation's management anticipates a reduction in pension and postretirement
benefit expense in 2000.This reduction is a result of the increased discount
rate for the retirement and postretirement benefit plans, favorable 1999
investment returns on employee retirement plan assets and the changes to the
postretirement benefit plan. There is no assurance that retirement and
postretirement expense reductions will continue due to the underlying
volatility of interest rates and investment returns (see Note I to the audited
consolidated financial statements on pages 20 through 23).

Certain agreements expose the Corporation to foreign currency fluctuations.
However, management believes this exposure is not material to the Corporation.

The Corporation has entered into a standby letter of credit agreement relating
to workers' compensation self-insurance requirements. On December 31,1999,the
Corporation had a contingent liability on this outstanding letter of credit of
approximately $6.7 million.

The 5.875% Notes, with an effective rate of 6.03%,that were issued in December
1998 through private placement in connection with the acquisition of Redland
Stone were subsequently registered with the Securities and Exchange Commission
(the "Commission") in February 1999.The initial purchasers in the private
placement offering exchanged their outstanding notes for registered notes with
substantially identical terms.

Currently, the Board has granted management the authority to file a universal
shelf registration statement with the Commission for up to $500 million in
issuance of either debt or equity securities. However, management has not
determined the timing when, or the amount for which, it may file such shelf
registration. In January 2000,the Corporation terminated and deregistered the
unissued debt securities in its $300 million effective shelf registration on
file with the Commission that had up to $50 million of debt securities
outstanding.

Martin Marietta Materials' internal cash flows and availability of financing
resources, including its access to capital markets, both debt and equity, and
its revolving credit agreements, are expected to continue to be sufficient to
provide the capital resources necessary to support anticipated operating needs,
to cover debt service requirements, to meet capital expenditures and
discretionary investment needs and to allow for payment of dividends for the
foreseeable future. The Corporation's ability to borrow or issue securities is
dependent upon, among other things, prevailing economic, financial and market
conditions.

The Corporation may be required to purchase some or all of the other investors'
interests in Meridian in 2000. The other investors, by the terms of the
original investment agreement consummated in 1998,have an annual option to
require the Corporation to purchase their interests, at a predetermined formula
price, beginning December 31,2000. The required purchase option is accelerated
in the event of the death of an investor. The Corporation may finance the
acquisition of the remaining Meridian interests in the public or private
markets.

The Corporation's senior unsecured debt has been rated "A" by Standard & Poor's
and "A3"by Moody's. The Corporation's $450 million commercial paper program is
rated "A-1"by Standard & Poor's,"P-2"by Moody's and "F-1"by Fitch IBCA,


PAGE 38 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES


<PAGE>   30

Inc. While management believes its credit ratings will remain at an
investment-grade level, no assurance can be given that these ratings will
remain at the above-mentioned levels.

ENVIRONMENTAL MATTERS

The Corporation's operations are subject to and affected by federal, state and
local laws, and regulations relating to the environment, health and safety and
other regulatory matters. Certain of the Corporation's operations may, from
time to time, involve the use of substances that are classified as toxic or
hazardous within the meaning of these laws and regulations. Environmental
operating permits are, or may be, required for certain of the Corporation's
operations, and such permits are subject to modification, renewal and
revocation. The Corporation regularly monitors and reviews its operations,
procedures and policies for compliance with these laws and regulations. Despite
these compliance efforts, risk of environmental liability is inherent in the
operation of the Corporation's businesses, as it is with other companies
engaged in similar businesses, and there can be no assurance that environmental
liabilities will not have a material adverse effect on the Corporation in the
future.

The Corporation records appropriate financial statement accruals for
environmental matters in the period in which liability is established and the
appropriate amount can be estimated reasonably. Among the variables that
management must assess in evaluating costs associated with environmental issues
are the evolving environmental regulatory standards. The nature of these
matters makes it difficult to estimate the amount of any costs that may be
necessary for future remedial measures. The Corporation currently has no
material provisions for estimated costs in connection with expected remediation
or other environmental-related expenditures because it is impossible to
quantify the impact of all actions regarding environmental matters,
particularly the extent and cost of future remediation and other compliance
efforts. However, in the opinion of management, it is unlikely that any
additional liability the Corporation may incur for known environmental issues
or compliance with present environmental-protection laws would have a material
adverse effect on the Corporation's consolidated financial position or on its
results of operations (see Note M to the audited consolidated financial
statements on page 25).

NEW ACCOUNTING STANDARDS

In June 1998,the Financial Accounting Standards Board (the "FASB") issued
Statement of Financial Accounting Standards No. 133, Accounting for Derivative
Instruments and Hedging Activities ("FAS 133"),which is required to be adopted
in years beginning after June 15,1999.The FASB amended FAS 133 to defer the
effective date of adoption until all fiscal quarters of all fiscal years
beginning after June 15, 2000.Statement of Financial Accounting Standards
No.137, Accounting for Derivative Instruments and Hedging Activities-Deferral
of the Effective Date of FASB Statement No.133,was issued in June 1999.Because
of the Corporation's minimal use of derivatives, if any, management does not
anticipate that the adoption of FAS 133 will have a significant impact on net
earnings or the financial position of the Corporation.

CAUTIONARY STATEMENTS

This Annual Report contains statements that constitute "forward-looking
statements" within the meaning of Section 27A of the Securities Act of 1933 and
Section 21E of the Securities Exchange Act of 1934. Investors are cautioned
that all forward-looking statements involve risks and uncertainties, including
those arising out of economic, climatic, political, regulatory, competitive and
other factors. The forward-looking statements in this document are intended to
be subject to the safe harbor protection provided by Sections 27A and 21E. For
a discussion identifying some important factors that could cause actual results
to vary materially from those anticipated in the forward-looking statements,
see the Corporation's filings with the Securities and Exchange Commission
including, but not limited to, the discussion of "Competition" in the
Corporation's Annual Report on Form 10-K for the fiscal year ended December
31,1999 (Form 10-K);"Management's Discussion and Analysis of Financial
Condition and Results of Operations" on pages 26 through 39 of this Annual
Report; "Note A: Accounting Policies" on pages 16 through 18 and "Note M:
Commitments and Contingencies" on page 25 of the Notes to Financial Statements
of the Audited Consolidated Financial Statements included in this Annual
Report, incorporated by reference into the Form 10-K.


           MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 39


<PAGE>   31
Q U A R T E R L Y    P E R F O R M A N C E

unaudited

<TABLE>
<CAPTION>
                                                                                                Basic Earnings Per
(add 000,except per share)     Net Sales               Gross Profit          Net Earnings        Common Share(*)
- --------------------------------------------------------------------------------------------------------------------
Quarter                    1999        1998        1999        1998        1999        1998      1999      1998
- --------------------------------------------------------------------------------------------------------------------
<S>                     <C>         <C>         <C>         <C>         <C>         <C>         <C>       <C>
First                   $  241,061  $  186,535  $   39,742  $   29,479  $    7,940  $    2,636  $ 0.17    $ 0.06
Second                     328,865     277,737      90,227      83,235      41,273      36,356    0.88      0.78
Third                      353,792     312,445      99,661      95,830      43,951      45,907    0.94      0.99
Fourth                     335,109     280,974      81,069      73,104      32,617      30,714    0.70      0.66
================================================================================================================
Totals                  $1,258,827  $1,057,691  $  310,699  $  281,648  $  125,781  $  115,613  $ 2.70    $ 2.49
================================================================================================================



<CAPTION>
                                                Common Dividends Paid and Stock Prices Per Common Share
                                                -------------------------------------------------------
                                                                                             Market Prices
                         Diluted Earnings Per                            ------------------------------------------------------
                           Common Share(*)         Dividends Paid           High          Low            High           Low
- -------------------------------------------------------------------------------------------------------------------------------
Quarter                   1999        1998        1999        1998                1999                           1998
- -------------------------------------------------------------------------------------------------------------------------------
<S>                     <C>         <C>         <C>         <C>         <C>             <C>            <C>           <C>
First                   $   0.17    $   0.06    $   0.13    $   0.12    $ 61             $49 3/16       $ 47 3/4      $35 13/16
Second                      0.88        0.78        0.13        0.12      68 1/8          54 7/8          49 5/16      42 3/16
Third                       0.94        0.98        0.13        0.13      60 3/8          35 1/4          51 1/4       41 11/16
Fourth                      0.70        0.66        0.13        0.13      42 5/8          35 3/8          62 3/16      38 5/8
===============================================================================================================================
Totals                  $   2.68    $   2.48    $   0.52    $   0.50
===============================================================================================================================
</TABLE>


(*)The sum of per-share earnings by quarter may not equal earnings per share
for the year due to changes in average share calculations. This is in
accordance with prescribed reporting requirements.

PAGE 40 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES


<PAGE>   32
F I V E   Y E A R    S U M M A R Y

<TABLE>
<CAPTION>
(add 000,except per share)                      1999           1998           1997           1996           1995
- --------------------------------------------------------------------------------------------------------------------
<S>                                         <C>            <C>            <C>            <C>            <C>
CONSOLIDATED OPERATING RESULTS
Net sales                                   $  1,258,827   $  1,057,691   $    900,863   $    721,947   $    664,406
Cost of sales, other costs and expenses        1,043,538        861,137        738,093        601,271        556,841
- --------------------------------------------------------------------------------------------------------------------
EARNINGS FROM OPERATIONS                         215,289        196,554        162,770        120,676        107,565
Interest expense on debt                          39,411         23,759         16,899         10,121          9,733
Other income and (expenses), net                  18,435          1,347          5,341          8,398          5,959
- --------------------------------------------------------------------------------------------------------------------
Earnings before taxes on income                  194,313        174,142        151,212        118,953        103,791
Taxes on income                                   68,532         58,529         52,683         40,325         36,240
- --------------------------------------------------------------------------------------------------------------------
NET EARNINGS                                $    125,781   $    115,613   $     98,529   $     78,628   $     67,551
====================================================================================================================
BASIC EARNINGS PER COMMON SHARE             $       2.70   $       2.49   $       2.14   $       1.71   $       1.47
====================================================================================================================
DILUTED EARNINGS PER COMMON SHARE           $       2.68   $       2.48   $       2.13   $       1.71   $       1.47
====================================================================================================================
CASH DIVIDENDS PER COMMON SHARE             $       0.52   $       0.50   $       0.48   $       0.46   $       0.44
====================================================================================================================


CONDENSED CONSOLIDATED BALANCE SHEET DATA
Current deferred income tax benefits        $     21,899   $     18,978   $     16,873   $     15,547   $     12,622
Current assets - other                           381,466        350,410        305,139        255,619        301,733
Property, plant and equipment, net               846,993        777,528        591,420        408,820        392,223
Costs in excess of net assets acquired           375,327        348,026        148,481         39,952         37,245
Other intangibles                                 31,497         27,952         26,415         23,216         23,967
Other noncurrent assets                           85,392         65,695         17,385         25,764         21,581
- --------------------------------------------------------------------------------------------------------------------
TOTAL                                       $  1,742,574   $  1,588,589   $  1,105,713   $    768,918   $    789,371
====================================================================================================================
Current liabilities - other                 $    142,974   $    136,576   $    106,804   $     86,871   $     69,596
Current maturities of long-term debt
  and commercial paper                            39,722         15,657          1,431          1,273        103,740
Long-term debt and commercial paper              602,011        602,113        310,675        125,890        124,986
Pension and postretirement benefits               85,839         76,209         63,070         52,646         47,483
Noncurrent deferred income taxes                  81,857         75,623         50,008         13,592         10,606
Other noncurrent liabilities                      16,165         14,712         11,889          7,669          9,415
Shareholders' equity                             774,006        667,699        561,836        480,977        423,545
- --------------------------------------------------------------------------------------------------------------------
TOTAL                                       $  1,742,574   $  1,588,589   $  1,105,713   $    768,918   $    789,371
====================================================================================================================
</TABLE>

           MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES PAGE 41

<PAGE>   1

                                                                   EXHIBIT 21.01



                 SUBSIDIARIES OF MARTIN MARIETTA MATERIALS, INC.
                              AS OF MARCH 12, 2000


<TABLE>
<CAPTION>
NAME OF SUBSIDIARY                                                                   PERCENT OWNED
- ------------------                                                                   -------------

<S>                                                                                     <C>
Alamo Gulf Coast Railroad Company, a Texas corporation                                  99.5%(1)

American Aggregates Corporation, a Delaware corporation                                  100%

American Stone Company, a North Carolina corporation                                      50%(2)

B&B Gravel Company, a Texas corporation                                                  100%(3)

B&B Materials and Hauling, Inc., a Texas corporation                                     100%(4)

Bahama Rock Limited, a Bahamas corporation                                               100%

Bayou Mining, Inc., a Louisiana corporation                                              100%

Caldwell/Mellott, Inc., a North Carolina corporation                                     100%

Central Rock Company, a North Carolina corporation                                       100%

Eastside Development Limited Partnership, a Texas limited partnership                     99%(5)

Fredonia Valley Railroad, Inc., a Delaware corporation                                   100%

Harding Street Corporation, a Delaware corporation                                       100%

Martin Marietta Aggregates of Arkansas, Inc., a Delaware corporation                     100%

Martin Marietta Aggregates of Iowa, Inc., an Iowa corporation                            100%

Martin Marietta Aggregates of Southern Iowa, Inc., an Iowa corporation                   100%

Martin Marietta Composites, Inc., a Delaware corporation                                 100%
</TABLE>

- ------------------------
1 Alamo Gulf Coast Railroad Company is owned by Martin Marietta Materials
Southwest, Inc. (99.5%) and certain individuals (0.5%).

2 Central Rock Company, a wholly-owned subsidiary of the Company, owns a 50%
interest in American Stone Company.

3 B&B Gravel Company is a wholly-owned subsidiary of Martin Marietta
Materials Southwest, Inc.

4 B&B Materials and Hauling, Inc. is a wholly-owned subsidiary of by Martin
Marietta Materials Southwest, Inc.

5 Eastside Development Limited Partnership is owned by Martin Marietta Materials
Southwest, Inc. (99%) and Redland Development Company (1%), a wholly-owned
subsidiary of Martin Marietta Materials Southwest, Inc.


<PAGE>   2

<TABLE>
<S>                                                                                     <C>
Martin Marietta Exports, Inc., a Barbados corporation                                    100%

Martin Marietta Magnesia Specialties Inc., a Delaware corporation                        100%

Martin Marietta Materials Canada Limited, a Nova Scotia, Canada corporation              100%

Martin Marietta Materials Canada Holdings Limited, a Nova Scotia, Canada                 100%(6)
  corporation

Martin Marietta Materials of Louisiana, Inc., a Delaware corporation                     100%

Martin Marietta Materials de Mexico, S.A. de C.V., a Mexican corporation                 100%(7)

Martin Marietta Materials Southwest, Inc., a Texas corporation                           100%

Martin Marietta Materials of Tennessee, Inc., a Delaware corporation                     100%

Martin Marietta Materials of Texas, Inc., a Delaware corporation                         100%

Martin Marietta Technologies Corp., a Delaware corporation                               100%

Meridian Aggregates Investments, LLC, a Delaware limited liability company             28.23%

Mid-State Construction & Materials, Inc., an Arkansas corporation                        100%(8)

Midway Holding Company, LLC, a Delaware limited liability company                       14.5%(9)

OK Sand & Gravel, LLC, a Delaware limited liability company                               99%(10)

R&S Sand & Gravel, LLC, a Delaware limited liability company                              99%(11)

Redland Development Company, a Texas corporation                                         100%(12)

Redland Park Development Limited Partnership, a Texas limited partnership               87.5%(13)
</TABLE>

- ------------------------
6 Martin Marietta Materials Canada Holdings Limited is a wholly-owned subsidiary
of Martin Marietta Materials Canada Limited.

7 Martin Marietta Materials de Mexico, S.A. de C.V. is owned by Martin Marietta
Magnesia Specialties Inc. (99%) and Martin Marietta Materials, Inc. (1%).

8 Mid-State Construction & Materials, Inc. is a wholly-owned subsidiary of
Martin Marietta Materials of Arkansas, Inc.

9 Midway Holding Company, LLC is owned 14.5% directly by Martin Marietta
Materials and 28.23% indirectly through Meridian Aggregates Investment, LLC.

10 Martin Marietta Materials, Inc. is the manager of and owns a 99% interest in
OK Sand & Gravel, LLC.

11 Martin Marietta Materials, Inc. is the manager of and owns a 99% interest in
R&S Sand & Gravel, Inc.

12 Redland Development Company is a wholly-owned subsidiary of Martin Marietta
Materials Southwest, Inc.

13 Redland Park Development Limited Partnership is owned 87.5% by Martin
Marietta Materials Southwest, Inc. directly and through its subsidiaries and
12.5% by Quarry, Inc., an unaffiliated corporation.

<PAGE>   3


<TABLE>
<S>                                                                                     <C>
Redland Stone Development Company, a Texas corporation                                   100%(14)

Superior Stone Company, a North Carolina corporation                                     100%

Theodore Holding, LLC, a Delaware limited liability company                               51%(15)
</TABLE>

- ------------------------
14 Redland Stone Development Company is a wholly-owned subsidiary of Martin
Marietta Materials Southwest, Inc.

15 Superior Stone Company, a wholly-owned subsidiary of the Company, is the
manager of and owns a 51% interest in Theodore Holding, LLC.



<PAGE>   1

                                                                   EXHIBIT 23.01




               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS



We consent to the incorporation by reference in this Annual Report (Form 10-K)
of Martin Marietta Materials, Inc., of our report dated January 24, 2000,
included in the 1999 Annual Report to Shareholders of Martin Marietta Materials,
Inc. and subsidiaries.

Our audit also included the financial statement schedule of Martin Marietta
Materials, Inc. and subsidiaries listed in Item 14(a). This schedule is the
responsibility of the Corporation's management. Our responsibility is to express
an opinion based on our audits. In our opinion, the financial statement schedule
referred to above, when considered in relation to the basic financial statements
taken as a whole, presents fairly in all material respects the information set
forth therein.

We also consent to the incorporation by reference in the Registration Statement
(Form S-8 No. 33-83516) pertaining to the Martin Marietta Materials, Inc.
Omnibus Securities Award Plan, as amended; in the Registration Statement (Form
S-8 No. 333-15429) pertaining to the Martin Marietta Materials, Inc. Common
Stock Purchase Plan for Directors, Martin Marietta Materials, Inc. Performance
Sharing Plan and the Martin Marietta Materials, Inc. Savings and Investment Plan
for Hourly Employees; in the Registration Statement (Form S-4 No. 333-71793)
pertaining to Martin Marietta Materials, Inc.'s registration of $200,000,000 of
Notes; and in the Registration Statement (Form S-8 No. 333-79039) pertaining to
the Martin Marietta Materials, Inc. Stock-Based Award Plan, as amended, of our
report dated January 24, 2000, with respect to the consolidated financial
statements incorporated herein by reference, and our report included in the
preceding paragraph with respect to the financial statement schedule included in
this Annual Report (Form 10-K) of Martin Marietta Materials, Inc., for the year
ended December 31, 1999.


                                                  ERNST & YOUNG LLP


Raleigh, North Carolina
March 23, 2000


<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET AS OF DECEMBER 31, 1999, AND THE RELATED CONSOLIDATED
STATEMENT OF EARNINGS FOR THE YEAR THEN ENDED AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31,
1999.
</LEGEND>
<MULTIPLIER> 1,000

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               DEC-31-1999
<CASH>                                           3,403
<SECURITIES>                                         0
<RECEIVABLES>                                  197,554
<ALLOWANCES>                                     4,707
<INVENTORY>                                    172,865
<CURRENT-ASSETS>                               403,365
<PP&E>                                       1,653,208
<DEPRECIATION>                                 806,215
<TOTAL-ASSETS>                               1,742,574
<CURRENT-LIABILITIES>                          182,696
<BONDS>                                        602,011
                                0
                                          0
<COMMON>                                           467
<OTHER-SE>                                     773,539
<TOTAL-LIABILITY-AND-EQUITY>                 1,742,574
<SALES>                                      1,258,827
<TOTAL-REVENUES>                             1,258,827
<CGS>                                          948,128
<TOTAL-COSTS>                                1,043,538
<OTHER-EXPENSES>                               (19,805)
<LOSS-PROVISION>                                 1,370
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