AMERICAN INDUSTRIAL PROPERTIES REIT INC
8-K, 1998-05-22
REAL ESTATE INVESTMENT TRUSTS
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT
                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934



        Date of report (Date of earliest event reported): April 29, 1998



                       AMERICAN INDUSTRIAL PROPERTIES REIT
               (Exact Name of Registrant as Specified in Charter)

<TABLE>
 <S>                                         <C>                         <C>
          TEXAS                                  1-9016                       75-6335572
(State or Other Jurisdiction of             (Commission File               (I.R.S. Employer
Incorporation or Organization)                   Number)                Identification Number)
</TABLE>



              6210 N. Beltline Road, Suite 170, Irving, Texas 75063
               (Address of Principal Executive Offices) (Zip Code)


       Registrant's telephone number, including area code: (972) 756-6000



                                 Not applicable
          (Former Name or Former Address, if Changed Since Last Report)



<PAGE>   2


ITEM 5.    OTHER EVENTS.

           On April 29, 1998, the Board of Trust Managers of American Industrial
Properties REIT (the "Trust") approved a form of Severance and Change In Control
Agreement (the "Agreement") to be entered into by the Trust and each of the
Trust's four executive officers. The Agreements were executed on May 5, 1998,
but are effective as of April 29, 1998.

           Pursuant to the terms of the Agreement, upon a change in control of
the Trust, the executive officer will be entitled to receive certain benefits
including, but not limited to: (i) 2.50 times executive's annualized base salary
rate as of the date of the first event constituting a change in control or, if
higher, executive's highest base salary in the previous five fiscal years; (ii)
2.50 times executive's targeted bonus amount for the fiscal year in which the
first event constituting a change in control occurs; (iii) all awards under
employee incentive plans shall immediately vest; and (iv) an additional cash
payment if any of the foregoing is subjected to an excise tax under Section 280G
and Section 4999 of the Internal Revenue Code of 1986, as amended.

           To resolve any conflicts between the Agreements and the Trust's
Employee and Trust Manager Incentive Share Plan, the Plan has also been amended.

ITEM 7.    FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.


(c)        EXHIBITS.

           *10.1           Severance and Change In Control Agreement dated as of
                           April 29, 1998, by and between Charles W. Wolcott and
                           the Trust.

           *10.2           Severance and Change In Control Agreement dated as of
                           April 29, 1998 by and between Marc A. Simpson and the
                           Trust.

           *10.3           Severance and Change In Control Agreement dated as of
                           April 29, 1998 by and between David B. Warner and the
                           Trust.

           *10.4           Severance and Change In Control Agreement dated as of
                           April 29, 1998 by and between Lewis D. Friedland and
                           the Trust.

           *10.5           Amendments to the Trust's Employee and Trust Manager
                           Incentive Share Plan.
- ---------------
* Filed herewith.

                                        2

<PAGE>   3




                                   SIGNATURES


           Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                   AMERICAN INDUSTRIAL PROPERTIES REIT



                                   /s/ Marc A. Simpson
                                   --------------------------------------------
                                    Marc A. Simpson
                                    Vice President and Chief Financial Officer,
                                    Secretary and Treasurer

Dated: May 21, 1998


                                        3

<PAGE>   4



                                  EXHIBIT LIST


           *10.1           Severance and Change In Control Agreement dated as of
                           April 29, 1998, by and between Charles W. Wolcott and
                           the Trust.

           *10.2           Severance and Change In Control Agreement dated as of
                           April 29, 1998, by and between Marc A. Simpson and
                           the Trust.

           *10.3           Severance and Change In Control Agreement dated as of
                           April 29, 1998, by and between David B. Warner and
                           the Trust.

           *10.4           Severance and Change In Control Agreement dated as of
                           April 29, 1998, by and between Lewis D. Friedland and
                           the Trust.

           *10.5           Amendments to the Trust's Employee and Trust Manager
                           Incentive Share Plan.

- ---------------
* Filed herewith


<PAGE>   1
                                                                    EXHIBIT 10.1


                   SEVERANCE AND CHANGE IN CONTROL AGREEMENT

       This Severance and Change in Control Agreement (this "Agreement") is
made and entered into as of this 29th day of April, 1998, by and between
American Industrial Properties REIT, a Texas real estate investment trust (the
"Trust") and Charles W. Wolcott ("Executive").

                                    RECITALS

       WHEREAS, Executive is currently employed by the Trust as President and
Chief Executive Officer;

       WHEREAS, to encourage Executive to remain employed with the Trust, the
Trust desires to provide Executive with an opportunity for certain severance
compensation in the event of a Change in Control (as defined below) of the
Trust on the terms and conditions set forth herein;

       WHEREAS, the Trust and Employee each recognize and hereby acknowledge
that Executive's employment with the Trust is and shall continue to be
terminable at will, without prior notice, by either the Trust or Executive; and

       WHEREAS, the Trust and Executive each hereby acknowledge that this
Agreement is not intended to be, and shall not be construed as, an express or
implied contract of employment between the Trust and Executive;

       WHEREAS, the parties agree that this Agreement shall replace and
supercede that certain Bonus and Severance Agreement between the parties hereto
dated as of March 13, 1996 (the "Prior Agreement");

       NOW, THEREFORE, for and in consideration of the mutual promises
hereinafter contained and other good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged by the parties hereto, the
Trust and Executive hereby agree as follows:

                                   AGREEMENTS

       1. CHANGE IN CONTROL. Upon the occurrence of a Change in Control, the
Executive will be entitled to the benefits provided by Section 2.

       2. SEVERANCE BENEFITS. (a) Following the occurrence of a Change in
Control, the Trust will pay to the Executive the Severance Benefit (as defined
below) in immediately available funds, in United States Dollars, within five
business days after the first occurrence of a Change in Control. In addition,
during the Severance Period, the Trust will arrange to provide the Executive
Employee Benefits that are welfare benefits (but not share options, share
purchase, share appreciation, dividend equivalent rights or similar
compensatory benefits) substantially
<PAGE>   2
similar to those which the Executive was receiving or entitled to receive
immediately prior to the Change in Control. Such one year period will be
considered service with the Trust for the purpose of determining service
credits and benefits due and payable to the Executive under the Trust's
retirement income, supplemental executive retirement, and other benefit plans
of the Trust applicable to the Executive, the Executive's dependents, or the
Executive's beneficiaries immediately prior to the Change in Control. If and to
the extent that any benefit described in the immediately preceding sentence is
not or cannot be paid or provided under any policy, plan, program or
arrangement of the Trust, then the Trust will itself pay or provide for the
payment of such Employee Benefits to the Executive, and, if applicable, the
Executive's dependents and beneficiaries. Without otherwise limiting the
purposes or effect of Section 3, Employee Benefits otherwise receivable by the
Executive pursuant to this Section 2(a) will be reduced to the extent
comparable welfare benefits are actually received by the Executive from another
employer during the Severance Period following the Executive's termination
date.

       (b) There will be no right of set-off or counterclaim in respect of any
claim, debt or obligation against any payment to or benefit for the Executive
provided for in this Agreement, except as expressly provided in the last
sentence of Section 2(a).

       (c) Notwithstanding any other provision hereof, the parties' respective
rights and obligations under this Section 2 and under Sections 4 and 5 will
survive any termination or expiration of this Agreement following a Change in
Control.

       3. NO MITIGATION OBLIGATION. Executive will not be required to mitigate
the amount of any payment provided for in this Agreement by seeking other
employment.

       4. CERTAIN ADDITIONAL PAYMENTS BY THE TRUST. (a) Notwithstanding
anything in this Agreement to the contrary, in the event it is determined (as
hereafter provided) that any payment or distribution by the Trust to or for the
benefit of the Executive, whether paid or payable or distributed or
distributable pursuant to the terms of this Agreement or otherwise pursuant to
or by reason of any other agreement, policy, plan, program or arrangement,
including without limitation any share option, share appreciation right,
dividend equivalent right, restricted shares or similar right, the lapse or
termination of any restriction on or the vesting or exercise ability of any of
the foregoing (any such payment or distribution, a "Payment"), would be subject
to the excise tax imposed by Section 4999 of the Internal Revenue Code of 1986,
as amended (the "Code") (or any successor provision thereto), by reason of
being considered "contingent on a change in ownership or control" of the Trust,
within the meaning of Section 280G of the Code (or any successor provision
thereto) or to any similar tax imposed by state or local law, or any interest
or penalties with respect to such tax (such tax or taxes, together with any
such interest and penalties, being hereafter collectively referred to as the
"Excise Tax"), then the Executive will be entitled to receive an additional
payment or payments (collectively, a "Gross-Up Payment"); provided, however,
that no Gross-up Payment will be made with respect to the Excise Tax, if any,
attributable to (A) any incentive share option ("ISO") granted prior to the
execution of this Agreement or (B) any share appreciation or similar right,
whether or not limited, granted in


                                       2
<PAGE>   3
tandem with any ISO described in clause (A) of this sentence. The Gross-Up
Payment will be in an amount such that, after payment by the Executive of all
taxes (including any interest or penalties imposed with respect to such taxes),
including any Excise Tax imposed upon the Gross-Up Payment, the Executive will
have received an amount of the Gross-Up Payment equal to the Excise Tax imposed
upon the Payment.

       (b) Subject to the provisions of Section 4(f), all determinations
required to be made under this Section 4, including whether an Excise Tax is
payable by the Executive and the amount of such Excise Tax and whether a Gross-
Up Payment is required to be paid by the Trust to the Executive and the amount
of such Gross-Up Payment, if any, will be made by a nationally recognized
accounting firm (the "Accounting Firm") selected by the Executive in the
Executive's sole discretion. The Executive will direct the Accounting Firm to
submit its determination and detailed supporting calculations to both the Trust
and the Executive within 30 calendar days after the Executive's termination
date, and any such other time or times as may be requested by the Trust or the
Executive. If the Accounting Firm determines that any Excise Tax is payable by
the Executive, the Trust will pay the required Gross-Up Payment to the
Executive within five business days after receipt of such determination and
calculations with respect to any Payment to the Executive. If the Accounting
Firm determines that no Excise Tax is payable by the Executive, it will, at the
same time as it makes such determination, furnish the Trust and the Executive
an opinion that the Executive has substantial authority not to report any
Excise Tax on the Executive's federal, state or local income or other tax
return. As a result of the uncertainty in the application of Section 4999 of
the Code (or any successor provision thereto) and the possibility of similar
uncertainty regarding applicable state or local tax law at the time of any
determination by the Accounting Firm hereunder, it is possible that Gross-Up
Payments which will not have been made by the Trust should have been made (an
"Underpayment"), consistent with the calculations required to be made
hereunder. In the event that the Trust exhausts or fails to pursue its remedies
pursuant to Section 4(f), and the Executive thereafter is required to make a
payment of any Excise Tax, the Executive will direct the Accounting Firm to
determine the amount of the Underpayment that has occurred and to submit its
determination and detailed supporting calculations to both the Trust and the
Executive as promptly as possible. Any such Underpayment will be promptly paid
by the Trust to, or for the benefit of, the Executive within five business days
after receipt of such determination and calculations.

       (c) The Trust and the Executive will each provide the Accounting Firm
access to and copies of any books, records and documents in the possession of
the Trust or the Executive, as the case may be, reasonably requested by the
Accounting Firm, and otherwise cooperate with the Accounting Firm in connection
with the preparation and issuance of the determinations and calculations
contemplated by Section 4(b). Any determination by the Accounting Firm as to
the amount of the Gross-Up Payment will be binding upon the Trust and the
Executive.

       (d) The federal, state and local income or other tax returns filed by
the Executive will be prepared and filed on a consistent basis with the
determination of the Accounting Firm with respect to the Excise Tax payable by
the Executive. The Executive will make proper payment of


                                       3
<PAGE>   4
the amount of any Excise Payment and, at the request of the Trust, provide to
the Trust true and correct copies (with any amendments) of the Executive's
federal income tax return as filed with the Internal Revenue Service and
corresponding state and local tax returns, if relevant, as filed with the
applicable taxing authority, and such other documents reasonably requested by
the Trust, evidencing such payment. If prior to the filing of the Executive's
federal income tax return, or corresponding state or local tax return, if
relevant, the Accounting Firm determines that the amount of the Gross-Up
Payment should be reduced, the Executive will within five business days pay to
the Trust the amount of such reduction.

       (e) The fees and expenses of the Accounting Firm for its services in
connection with the determinations and calculations contemplated by Section
4(b) will be borne by the Trust. If such fees and expenses are initially paid
by the Executive, the Trust will reimburse the Executive the full amount of
such fees and expenses within five business days after receipt from the
Executive of a statement therefor and reasonable evidence of the Executive's
payment thereof.

       (f) The Executive will notify the Trust in writing of any claim by the
Internal Revenue Service or any other taxing authority that, if successful,
would require the payment by the Trust of a Gross-Up Payment. Such notification
will be given as promptly as practicable but no later than 10 business days
after the Executive actually receives notice of such claim and the Executive
will further apprise the Trust of the nature of such claim and the date on
which such claim is requested to be paid (in each case, to the extent known by
the Executive). The Executive will not pay such claim prior to the earlier of
(i) the expiration of the 30-calendar day period following the date on which
the Executive gives such notice to the Trust and (ii) the date that any payment
of amount with respect to such claim is due. If the Trust notifies the
Executive in writing prior to the expiration of such period that it desires to
contest such claim, the Executive will:

              (A) provide the Trust with any written records or documents in
the Executive's possession relating to such claim reasonably requested by the
Trust;

              (B) take such action in connection with contesting such claim as
the Trust may reasonably request in writing from time to time, including
without limitation accepting legal representation with respect to such claim by
an attorney competent in respect of the subject matter and reasonably selected
by the Trust;

              (C) cooperate with the Trust in good faith in order effectively
to contest such claim; and

              (D) permit the Trust to participate in any proceedings relating
to such claims;

provided, however, that the Trust will bear and pay directly all costs and
expenses (including interest and penalties) incurred in connection with such
contest and will indemnify and hold harmless the Executive, on an after-tax
basis, for and against any Excise Tax or income tax, including interest and
penalties with respect thereto, imposed as a result of such representation and



                                       4
<PAGE>   5
payment of costs and expenses. Without limiting the foregoing provisions of
this Section 4(f), the Trust will control all proceedings taken in connection
with the contest of any claim contemplated by this Section 4(f), and, at its
sole option, may pursue or forego any and all administrative appeals,
proceedings, hearings and conferences with the taxing authority in respect of
such claim (provided, however, that the Executive may participate therein at
the Executive's own cost and expense) and may, at its option, either direct the
Executive to pay the tax claimed and sue for a refund or contest the claim in
any permissible manner, and the Executive will 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 Trust may determine;
provided, however, that if the Trust directs the Executive to pay the tax
claimed and sue for a refund, the Trust will advance the amount of such payment
to the Executive on an interest-free basis and will indemnify and hold the
Executive harmless, on an after-tax basis, from any Excise Tax or income or
other tax, including interest or penalties with respect thereto, imposed with
respect to such advance; and provided further, however, that any extension of
the statute of limitations relating to payment of taxes for the taxable year of
the Executive with respect to which the contested amount is claimed to be due
is limited solely to such contested amount. The Trust's control of any such
contested claim will be limited to issues with respect to which a Gross-Up
Payment would be payable hereunder and the Executive will be entitled to settle
or contest, as the case may be, any other issue raised by the Internal Revenue
Service or any other taxing authority.

       (g) If, after the receipt by the Executive of an amount advanced by the
Trust pursuant to Section 4(f), the Executive receives any refund with respect
to such claim, the Executive will (subject to the Trust's complying with the
requirements of Section 4(f), pay to the Trust the amount of such refund
(together with any interest paid or credited thereon after any taxes applicable
thereto) within 30 calendar days after such receipt and the Trust's
satisfaction of all accrued obligations under this Agreement. If, after the
receipt by the Executive of any amount advanced by the Trust pursuant to
Section 4(f), a determination is made that the Executive will not be entitled
to any refund with respect to such claim and the Trust does not notify the
Executive in writing of its intent to contest such determination prior to the
expiration of 30 calendar days after such determination, then such advance will
be forgiven and will not be required to be repaid and the amount of any such
advance will offset, to the extent thereof, the amount of Gross-Up Payment
required to be paid by the Trust to the Executive pursuant to this Section 4.

       5. LEGAL FEES AND EXPENSES; SECURITY. It is the intent of the Trust that
the Executive not be required to incur legal fees and the related expenses
associated with the interpretation, enforcement or defense of the Executive's
rights to compensation upon a Change in Control by litigation or otherwise
because the cost and expense thereof would substantially detract from the
benefits intended to be extended to the Executive hereunder. Accordingly, if it
should appear to the Executive that the Trust has failed to comply with any of
its obligations under this Agreement or in the event that the Trust or any
other person takes or threatens to take any action to declare the agreement to
pay Executive compensation upon a Change in Control void or unenforceable, or
institutes any litigation or other action or proceeding designed to deny, or to
recover from, the Executive the benefits provided or intended to be provided to
the Executive hereunder, the Trust


                                       5
<PAGE>   6
irrevocably authorizes the Executive from time to time to retain counsel of the
Executive's choice, at the expense of the Trust as hereinafter provided, to
advise and represent the Executive in connection with any such interpretation,
enforcement or defense, including without limitation the initiation or defense
of any litigation or other legal action, whether by or against the Trust or any
Trust Manager, officer, shareholder, or other person affiliated with the Trust,
in any jurisdiction. Notwithstanding any existing or prior attorney-client
relationship between the Trust and such counsel, the Trust irrevocably consents
to the Executive's entering into an attorney-client relationship with such
counsel, and in that connection the Trust and the Executive agree that a
confidential relationship will exist between the Executive and such counsel.
Without regard to whether the Executive prevails, in whole or in part, in
connection with any of the foregoing, the Trust will pay and be solely
financially responsible for any and all attorneys' and related fees and
expenses incurred by the Executive in connection with any of the foregoing.

       6. EMPLOYMENT RIGHTS; TERMINATION PRIOR TO CHANGE IN CONTROL. Nothing
expressed or implied in this Agreement will create any right or duty on the
part of the Trust or the Executive to have the Executive remain in the employ
of the Trust prior to or following any Change in Control. Any termination of
the employment of the Executive or the removal of the Executive from any office
or position in the Trust following the commencement of any discussion with a
third person that results in a Change in Control within 180 calendar days after
such termination or removal will be deemed to be a termination or removal of
the Executive after a Change in Control for purposes of this Agreement,
entitling Executive to receive all benefits he would have received under this
Agreement had he been an employee of the Trust on the date of the Change in
Control.

       7. CERTAIN DEFINED TERMS. In addition to terms defined elsewhere herein,
the following terms have the following meanings when used herein with initial
capital letters:

       (a) "Change in Control" means the occurrence during the term of this
Agreement of any of the following events:

              (i) the Trust is merged, consolidated, or reorganized into or
       with another corporation or other legal entity and the Trust is not the
       "surviving entity;"

              (ii) the Trust sells or otherwise transfers 50% or more of its
       assets to another corporation or other legal entity or in a series of
       related transactions;

              (iii) there is a report filed on Schedule 13D or Schedule 14D-1
       (or any successor schedule, form or report or item therein), each as
       promulgated pursuant to the Securities Exchange Act of 1934, as amended
       (the "Exchange Act"), disclosing that any person (as the term "person"
       is used in Section 13(d)(3) or Section 14(d)(2) of the Exchange Act) has
       become the beneficial owner (as the term "beneficial owner" is defined
       under Rule 13d-3 or any successor rule or regulation promulgated under
       the Exchange Act) of securities representing over 33% of the combined
       voting power of the securities of the Trust entitled



                                       6
<PAGE>   7
       to vote generally in the election of Trust Managers (the "Voting
       Shares") of the Trust or could become the owner of over 33% of the
       Trust's Common Shares of Beneficial Interest through the conversion of
       the Trust's debt or equity securities;

              (iv) the Trust files a report or proxy statement with the
       Securities and Exchange Commission pursuant to the Exchange Act
       disclosing in response to Form 8-K or Schedule 14A (or any successor
       schedule, form or report or item therein) that a change in control of
       the Trust has occurred or will occur in the future pursuant to any then-
       existing contract or transaction; provided, however, a Change in Control
       shall be deemed to occur only when the transaction described in the Form
       8-K or Schedule 14A (or any successor schedule, form or report or item
       therein) is consummated; or

              (v) if, during any period of 12 months, individuals who at the
       beginning of any such period constitute the Trust Managers of the Trust
       cease for any reason (other than death or disability) to constitute at
       least a majority thereof;

Notwithstanding the foregoing provisions of Section 7(a), a "Change in Control"
will not be deemed to have occurred for purposes of this Section 7(a) solely
because (A) an entity in which the Trust, directly or indirectly, beneficially
owns 50% or more of the voting securities (a "Subsidiary"), or (B) any employee
share ownership plan or any other employee benefit plan of the Trust or any
Subsidiary either files or becomes obligated to file a report or a proxy
statement under or in response to Schedule 13D, Schedule 14D-1, Form 8-K, or
Schedule 14A (or any successor schedule, form, or report or item therein) under
the Exchange Act disclosing beneficial ownership by it of shares of Voting
Shares, whether in excess of 33% or otherwise, or because the Trust reports
that a change in control of the Trust has occurred or will occur in the future
by reason of such beneficial ownership. 

       The determination as to which party to a merger, consolidation or
reorganization is the "surviving entity" within the meaning of Section 7(a)
shall be made on the basis of the relative equity interests of the shareholders
in the entity existing after the merger, consolidation or reorganization, as
follows: if following any merger, consolidation or reorganization the holders
of outstanding Voting Shares of the Trust immediately prior to the merger,
consolidation or reorganization own equity securities possessing more than 50%
of the voting power of the entity existing following the merger, consolidation
or reorganization, the Trust shall be the surviving entity. In all other cases,
the Trust shall not be the surviving entity. In making the determination of
ownership of equity securities by the shareholders of an entity immediately
after the merger, consolidation or reorganization pursuant to this paragraph,
equity securities which the shareholders owned immediately before the merger,
consolidation or reorganization as shareholders of another party to the
transaction shall be disregarded. Further, for purposes of this paragraph only,
outstanding voting securities of an entity shall be calculated by assuming the
conversion of all equity securities convertible (immediately or at some future
time) into shares entitled to vote.



                                      7
<PAGE>   8
       (b) "Employee Benefits" means the perquisites, benefits and service
credit for benefits as provided under any and all employee retirement income
and welfare benefit policies, plans, programs or arrangements in which the
Executive is entitled to participate, including without limitation any share
option, share purchase, share appreciation, dividend equivalent rights,
savings, pension, supplemental executive retirement or other retirement income
or welfare benefit, deferred compensation, incentive compensation, group or
other life, health, medical/hospital, or other insurance (whether funded by
actual insurance or self-insured by the Trust), disability, salary
continuation, expense reimbursement, and other employee benefit policies,
plans, programs or arrangements that may now exist or any equivalent successor
policies, plans, programs or arrangements that may be adopted hereafter by the
Trust, providing perquisites, benefits and service credit for benefits at least
as great in the aggregate as are payable thereunder prior to a Change in
Control.

       (c) The term "Severance Benefit" shall mean an amount equal to 2.50
times (i) the Executive's annualized base salary rate as of the date of the
first event constituting a Change in Control or, if higher, (ii) the Executive's
highest base salary received for any year in the previous five fiscal years
immediately preceding the first event constituting a Change in Control, plus
2.50 times Executive's targeted bonus amount for the fiscal year in which the
first event constituting a Change in Control occurs. If Executive has been
employed by the Trust for less than five years, this Section 7(c) shall be
deemed to mean such actual period of employment.

       (d) "Severance Period" means the period of time commencing on the date
of an occurrence of each Change in Control and continuing until the earliest of
(i) the expiration of one year after each occurrence of an event constituting a
Change in Control, (ii) the Executive's death, or (iii) the Executive's
attainment of age 65.

       8. TERM. The term of this Agreement shall be deemed to commence and be
effective as of the date of this Agreement and shall continue for a five-year
term and shall automatically renew for one-year terms unless either party gives
notice of its intent not to renew at least 180 days prior to the end of any
term or, unless earlier terminated in accordance with the provisions hereof.

       9. TERMINATION. Except with respect to the provisions of this Agreement
that provide for payments to be made to Executive after termination of
employment, this Agreement shall terminate automatically without further action
by either of the parties hereto upon the death or permanent disability of
Executive or the termination of Executive's employment with the Trust for any
reason or no reason, in accordance with Executive's status as an employee at
will. As used herein, the term "permanent disability" means physical or mental
disability or both that is determined by the Trust, in its reasonable
discretion, to substantially impair the ability of Executive to perform the
day-to-day functions normally performed by Executive if the disability is
suffered (or is reasonably expected to be suffered) by Executive for a period
of not less than six consecutive calendar months. Notwithstanding the foregoing
and except as set forth in Section 6, Executive (or his estate, heirs or
personal representatives, as applicable) shall not be entitled to



                                       8
<PAGE>   9
severance compensation except to the extent that a Change in Control of the
Trust occurs 180 days or less prior to the termination of this Agreement.

       10. REPRESENTATION BY EXECUTIVE. Executive hereby represents and
warrants to the Trust that there are no agreements or understandings that would
make unlawful his execution or delivery of this Agreement.

       11. NOTICES. All notices, renewals and other communications required or
permitted under this Agreement must be in writing and shall be deemed to have
been given if delivered or mailed, by certified mail, first class postage
prepaid, to the parties at the addresses set forth in this Agreement, as the
same may be changed in writing by the parties from time to time.

       12. ENTIRE AGREEMENT. The parties expressly agree that this Agreement is
contractual in nature and not a mere recital, and that it contains all the terms
and conditions of the agreement between the parties with respect to the matters
set forth herein. All prior negotiations, agreements, arrangements,
understandings and statements between the parties relating to the matters set
forth herein that have occurred at any time or contemporaneously with the
execution of this Agreement (including, but not limited to, the Prior Agreement)
are superseded and merged into this completely integrated Agreement. The
Recitals set forth above shall be deemed to be part of this Agreement.

       13. GOVERNING LAW. This Agreement was negotiated and is performable in
Dallas County, Texas and shall be governed by the laws of the State of Texas
without giving effect to principles of conflicts of law.

       14. SEVERABILITY. If any provision of this Agreement is held to be
illegal, invalid or unenforceable under any present or future law, such
provisions shall be fully severable, and this Agreement shall be construed and
enforced as if such illegal, invalid or unenforceable provision had never
comprised a part hereof, the remaining provisions of this Agreement shall
remain in full force and effect and shall not be affected by the illegal,
invalid or unenforceable provision or by its severance herefrom, and in lieu of
such provision, there shall be added automatically as a part of this Agreement,
a legal, valid and enforceable provision as similar in terms to such illegal,
invalid or unenforceable provision as may be possible, and the Trust and
Executive hereby request the court or any arbitrator to whom disputes relating
to this Agreement are submitted to reform the otherwise unenforceable covenant
in accordance with the proceeding provision.

       15. COUNTERPARTS. This Agreement may be executed in multiple identical
counterparts, each of which shall be deemed an original, and all of which taken
together shall constitute but one and the same instrument. In making proof of
this Agreement, it shall not be necessary to produce or account for more than
one counterpart executed by the party sought to be charged with performance
hereunder.


                                       9
<PAGE>   10
       16. ASSIGNMENT AND DELEGATION. All rights, covenants and agreements of
the Trust set forth in this Agreement shall, unless otherwise provided herein,
be binding upon and inure to the benefit of the Trust's respective successors
and assigns. All rights, covenants and agreements of Executive set forth in
this Agreement shall, unless otherwise provided herein, not be assignable by
Executive, and shall be considered personal to Executive for all purposes.

       17. DEATH. If Executive dies before receiving payment under this
Agreement, a lump-sum payment shall be made to Executive's estate or designated
beneficiary.

       18. WAIVER OF BREACH. Failure by either party to demand strict
compliance with any of the terms, covenants or provisions hereof shall not be
deemed a waiver of the term, covenant or provision, nor any waiver or
relinquishment by the Trust of any power at any other time or times.

       19. WITHHOLDING OF TAXES. The Trust shall withhold taxes from amounts
paid pursuant to this Agreement as required by law, and, to the extent deemed
necessary by the Trust, in good faith.

       20. VESTING OF BENEFITS. Notwithstanding anything in this Agreement, the
Trust's Employee and Trust Manager Incentive Share Plan (the "Plan"), any
agreement entered into under the Plan, or under any retirement, pension, profit
sharing or other similar plan, upon the occurrence of a Change in Control, all
deferred or unvested portions of any award made to Executive under any of the
foregoing plans and agreements shall automatically become fully vested in
Executive and shall be in effect and redeemable by or payable to Executive, or
Executive's designated beneficiary or estate, on the same conditions (other
than vesting) as would have applied had the Change in Control not occurred. All
unvested awards under the Plan shall immediately vest upon the Change in
Control and the Executive shall have the right to exercise any vested awards
during the balance of the awards' term.

       IN WITNESS WHEREOF, the undersigned have executed and delivered this
Agreement as of the date first set forth above.

                            AMERICAN INDUSTRIAL PROPERTIES REIT


                            By: /s/ Marc A. Simpson             
                                --------------------------------
                            Title: Vice President and Secretary

                            Notice Address: 6210 North Beltline
                                            Suite 170
                                            Irving, Texas 75063-2656



                                       10
<PAGE>   11
                            EXECUTIVE:




                            /s/ CHARLES W. WOLCOTT          
                            --------------------------------
                            Charles W. Wolcott

                            Notice Address:                                
                                             ------------------------------
                                             ------------------------------
                                             ------------------------------



                                       11

<PAGE>   1

                                                                    EXHIBIT 10.2

                   SEVERANCE AND CHANGE IN CONTROL AGREEMENT


         This Severance and Change in Control Agreement (this "Agreement") is
made and entered into as of this 29th day of April, 1998, by and between
American Industrial Properties REIT, a Texas real estate investment trust (the
"Trust") and Marc A. Simpson ("Executive").

                                    RECITALS

         WHEREAS, Executive is currently employed by the Trust as Vice
President and Chief Financial Officer;

         WHEREAS, to encourage Executive to remain employed with the Trust, the
Trust desires to provide Executive with an opportunity for certain severance
compensation in the event of a Change in Control (as defined below) of the
Trust on the terms and conditions set forth herein;

         WHEREAS, the Trust and Employee each recognize and hereby acknowledge
that Executive's employment with the Trust is and shall continue to be
terminable at will, without prior notice, by either the Trust or Executive; and

         WHEREAS, the Trust and Executive each hereby acknowledge that this
Agreement is not intended to be, and shall not be construed as, an express or
implied contract of employment between the Trust and Executive;

         WHEREAS, the parties agree that this Agreement shall replace and
supercede that certain Bonus and Severance Agreement between the parties hereto
dated as of March 13, 1996 (the "Prior  Agreement");

         NOW, THEREFORE, for and in consideration of the mutual promises
hereinafter contained and other good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged by the parties hereto, the
Trust and Executive hereby agree as follows:

                                   AGREEMENTS

         1.      CHANGE IN CONTROL. Upon the occurrence of a Change in Control,
the Executive will be entitled to the benefits provided by Section 2.

         2.      SEVERANCE BENEFITS.    (a) Following the occurrence of a
Change in Control, the Trust will pay to the Executive the Severance Benefit
(as defined below) in immediately available funds, in United States Dollars,
within five business days after the first occurrence of a Change in Control.
In addition, during the Severance Period, the Trust will arrange to provide the
Executive Employee Benefits that are welfare benefits (but not share options,
share purchase, share appreciation, dividend equivalent rights or similar
compensatory benefits) substantially
<PAGE>   2
similar to those which the Executive was receiving or entitled to receive
immediately prior to the Change in Control.  Such one year period will be
considered service with the Trust for the purpose of determining service
credits and benefits due and payable to the Executive under the Trust's
retirement income, supplemental executive retirement, and other benefit plans
of the Trust applicable to the Executive, the Executive's dependents, or the
Executive's beneficiaries immediately prior to the Change in Control.  If and
to the extent that any benefit described in the immediately preceding sentence
is not or cannot be paid or provided under any policy, plan, program or
arrangement of the Trust, then the Trust will itself pay or provide for the
payment of such Employee Benefits to the Executive, and, if applicable, the
Executive's dependents and beneficiaries.  Without otherwise limiting the
purposes or effect of Section 3, Employee Benefits otherwise receivable by the
Executive pursuant to this Section 2(a) will be reduced to the extent
comparable welfare benefits are actually received by the Executive from another
employer during the Severance Period following the Executive's termination
date.

         (b)     There will be no right of set-off or counterclaim in respect
of any claim, debt or obligation against any payment to or benefit for the
Executive provided for in this Agreement, except as expressly provided in the
last sentence of Section 2(a).

         (c)     Notwithstanding any other provision hereof, the parties'
respective rights and obligations under this Section 2 and under Sections 4 and
5 will survive any termination or expiration of this Agreement following a
Change in Control.

         3.      NO MITIGATION OBLIGATION.  Executive will not be required to
mitigate the amount of any payment provided for in this Agreement by seeking
other employment.

         4.      CERTAIN ADDITIONAL PAYMENTS BY THE TRUST.    (a)
Notwithstanding anything in this Agreement to the contrary, in the event it is
determined (as hereafter provided) that any payment or distribution by the
Trust to or for the benefit of the Executive, whether paid or payable or
distributed or distributable pursuant to the terms of this Agreement or
otherwise pursuant to or by reason of any other agreement, policy, plan,
program or arrangement, including without limitation any share option, share
appreciation right, dividend equivalent right, restricted shares or similar
right, the lapse or termination of any restriction on or the vesting or
exercise ability of any of the foregoing (any such payment or distribution, a
"Payment"), would be subject to the excise tax imposed by Section 4999 of the
Internal Revenue Code of 1986, as amended (the "Code") (or any successor
provision thereto), by reason of being considered "contingent on a change in
ownership or control" of the Trust, within the meaning of Section 280G of the
Code (or any successor provision thereto) or to any similar tax imposed by
state or local law, or any interest or penalties with respect to such tax (such
tax or taxes, together with any such interest and penalties, being hereafter
collectively referred to as the "Excise Tax"), then the Executive will be
entitled to receive an additional payment or payments (collectively, a
"Gross-Up Payment"); provided, however, that no Gross-up Payment will be made
with respect to the Excise Tax, if any, attributable to (A) any incentive share
option ("ISO") granted prior to the execution of this Agreement or (B) any
share appreciation or similar right, whether or not limited, granted in





                                       2
<PAGE>   3
tandem with any ISO described in clause (A) of this sentence.  The Gross-Up
Payment will be in an amount such that, after payment by the Executive of all
taxes (including any interest or penalties imposed with respect to such taxes),
including any Excise Tax imposed upon the Gross-Up Payment, the Executive will
have received an amount of the Gross-Up Payment equal to the Excise Tax imposed
upon the Payment.

         (b)     Subject to the provisions of Section 4(f), all determinations
required to be made under this Section 4, including whether an Excise Tax is
payable by the Executive and the amount of such Excise Tax and whether a
Gross-Up Payment is required to be paid by the Trust to the Executive and the
amount of such Gross-Up Payment, if any, will be made by a nationally
recognized accounting firm (the "Accounting Firm") selected by the Executive in
the Executive's sole discretion.  The Executive will direct the Accounting Firm
to submit its determination and detailed supporting calculations to both the
Trust and the Executive within 30 calendar days after the Executive's
termination date, and any such other time or times as may be requested by the
Trust or the Executive.  If the Accounting Firm determines that any Excise Tax
is payable by the Executive, the Trust will pay the required Gross-Up Payment
to the Executive within five business days after receipt of such determination
and calculations with respect to any Payment to the Executive.  If the
Accounting Firm determines that no Excise Tax is payable by the Executive, it
will, at the same time as it makes such determination, furnish the Trust and
the Executive an opinion that the Executive has substantial authority not to
report any Excise Tax on the Executive's federal, state or local income or
other tax return.  As a result of the uncertainty in the application of Section
4999 of the Code (or any successor provision thereto) and the possibility of
similar uncertainty regarding applicable state or local tax law at the time of
any determination by the Accounting Firm hereunder, it is possible that
Gross-Up Payments which will not have been made by the Trust should have been
made (an "Underpayment"), consistent with the calculations required to be made
hereunder.  In the event that the Trust exhausts or fails to pursue its
remedies pursuant to Section 4(f) and the Executive thereafter is required to
make a payment of any Excise Tax, the Executive will direct the Accounting Firm
to determine the amount of the Underpayment that has occurred and to submit its
determination and detailed supporting calculations to both the Trust and the
Executive as promptly as possible.  Any such Underpayment will be promptly paid
by the Trust to, or for the benefit of, the Executive within five business days
after receipt of such determination and calculations.

         (c)     The Trust and the Executive will each provide the Accounting
Firm access to and copies of any books, records and documents in the possession
of the Trust or the Executive, as the case may be, reasonably requested by the
Accounting Firm, and otherwise cooperate with the Accounting Firm in connection
with the preparation and issuance of the determinations and calculations
contemplated by Section 4(b).  Any determination by the Accounting Firm as to
the amount of the Gross-Up Payment will be binding upon the Trust and the
Executive.

         (d)     The federal, state and local income or other tax returns filed
by the Executive will be prepared and filed on a consistent basis with the
determination of the Accounting Firm with respect to the Excise Tax payable by
the Executive.  The Executive will make proper payment of





                                       3
<PAGE>   4
the amount of any Excise Payment and, at the request of the Trust, provide to
the Trust true and correct copies (with any amendments) of the Executive's
federal income tax return as filed with the Internal Revenue Service and
corresponding state and local tax returns, if relevant, as filed with the
applicable taxing authority, and such other documents reasonably requested by
the Trust, evidencing such payment.  If prior to the filing of the Executive's
federal income tax return, or corresponding state or local tax return, if
relevant, the Accounting Firm determines that the amount of the Gross-Up
Payment should be reduced, the Executive will within five business days pay to
the Trust the amount of such reduction.

         (e)     The fees and expenses of the Accounting Firm for its services
in connection with the determinations and calculations contemplated by Section
4(b) will be borne by the Trust.  If such fees and expenses are initially paid
by the Executive, the Trust will reimburse the Executive the full amount of
such fees and expenses within five business days after receipt from the
Executive of a statement therefor and reasonable evidence of the Executive's
payment thereof.

         (f)     The Executive will notify the Trust in writing of any claim by
the Internal Revenue Service or any other taxing authority that, if successful,
would require the payment by the Trust of a Gross-Up Payment.  Such
notification will be given as promptly as practicable but no later than 10
business days after the Executive actually receives notice of such claim and
the Executive will further apprise the Trust of the nature of such claim and
the date on which such claim is requested to be paid (in each case, to the
extent known by the Executive).  The Executive will not pay such claim prior to
the earlier of (i) the expiration of the 30-calendar day period following the
date on which the Executive gives such notice to the Trust and (ii) the date
that any payment of amount with respect to such claim is due.  If the Trust
notifies the Executive in writing prior to the expiration of such period that
it desires to contest such claim, the Executive will:

                 (A)      provide the Trust with any written records or
documents in the Executive's possession relating to such claim reasonably
requested by the Trust;

                 (B)      take such action in connection with contesting such
claim as the Trust may reasonably request in writing from time to time,
including without limitation accepting legal representation with respect to
such claim by an attorney competent in respect of the subject matter and
reasonably selected by the Trust;

                 (C)      cooperate with the Trust in good faith in order
effectively to contest such claim; and

                 (D)      permit the Trust to participate in any proceedings
relating to such claims;

provided, however, that the Trust will bear and pay directly all costs and
expenses (including interest and penalties) incurred in connection with such
contest and will indemnify and hold harmless the Executive, on an after-tax
basis, for and against any Excise Tax or income tax, including interest and
penalties with respect thereto, imposed as a result of such representation and





                                       4
<PAGE>   5
payment of costs and expenses.  Without limiting the foregoing provisions of
this Section 4(f), the Trust will control all proceedings taken in connection
with the contest of any claim contemplated by this Section 4(f) and, at its
sole option, may pursue or forego any and all administrative appeals,
proceedings, hearings and conferences with the taxing authority in respect of
such claim (provided, however, that the Executive may participate therein at
the Executive's own cost and expense) and may, at its option, either direct the
Executive to pay the tax claimed and sue for a refund or contest the claim in
any permissible manner, and the Executive will 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 Trust may determine;
provided, however, that if the Trust directs the Executive to pay the tax
claimed and sue for a refund, the Trust will advance the amount of such payment
to the Executive on an interest-free basis and will indemnify and hold the
Executive harmless, on an after-tax basis, from any Excise Tax or income or
other tax, including interest or penalties with respect thereto, imposed with
respect to such advance; and provided further, however, that any extension of
the statute of limitations relating to payment of taxes for the taxable year of
the Executive with respect to which the contested amount is claimed to be due
is limited solely to such contested amount.  The Trust's control of any such
contested claim will be limited to issues with respect to which a Gross-Up
Payment would be payable hereunder and the Executive will be entitled to settle
or contest, as the case may be, any other issue raised by the Internal Revenue
Service or any other taxing authority.

         (g)     If, after the receipt by the Executive of an amount advanced
by the Trust pursuant to Section 4(f), the Executive receives any refund with
respect to such claim, the Executive will (subject to the Trust's complying
with the requirements of Section 4(f)) pay to the Trust the amount of such
refund (together with any interest paid or credited thereon after any taxes
applicable thereto) within 30 calendar days after such receipt and the Trust's
satisfaction of all accrued obligations under this Agreement.  If, after the
receipt by the Executive of any amount advanced by the Trust pursuant to
Section 4(f), a determination is made that the Executive will not be entitled
to any refund with respect to such claim and the Trust does not notify the
Executive in writing of its intent to contest such determination prior to the
expiration of 30 calendar days after such determination, then such advance will
be forgiven and will not be required to be repaid and the amount of any such
advance will offset, to the extent thereof, the amount of Gross-Up Payment
required to be paid by the Trust to the Executive pursuant to this Section 4.

         5.      LEGAL FEES AND EXPENSES; SECURITY.  It is the intent of the
Trust that the Executive not be required to incur legal fees and the related
expenses associated with the interpretation, enforcement or defense of the
Executive's rights to compensation upon a Change in Control by litigation or
otherwise because the cost and expense thereof would substantially detract from
the benefits intended to be extended to the Executive hereunder.  Accordingly,
if it should appear to the Executive that the Trust has failed to comply with
any of its obligations under this Agreement or in the event that the Trust or
any other person takes or threatens to take any action to declare the agreement
to pay Executive compensation upon a Change in Control void or unenforceable,
or institutes any litigation or other action or proceeding designed to deny, or
to recover from, the Executive the benefits provided or intended to be provided
to the Executive hereunder, the Trust





                                       5
<PAGE>   6
irrevocably authorizes the Executive from time to time to retain counsel of the
Executive's choice, at the expense of the Trust as hereinafter provided, to
advise and represent the Executive in connection with any such interpretation,
enforcement or defense, including without limitation the initiation or defense
of any litigation or other legal action, whether by or against the Trust or any
Trust Manager, officer, shareholder, or other person affiliated with the Trust,
in any jurisdiction.  Notwithstanding any existing or prior attorney-client
relationship between the Trust and such counsel, the Trust irrevocably consents
to the Executive's entering into an attorney-client relationship with such
counsel, and in that connection the Trust and the Executive agree that a
confidential relationship will exist between the Executive and such counsel.
Without regard to whether the Executive prevails, in whole or in part, in
connection with any of the foregoing, the Trust will pay and be solely
financially responsible for any and all attorneys' and related fees and
expenses incurred by the Executive in connection with any of the foregoing.

         6.      EMPLOYMENT RIGHTS; TERMINATION PRIOR TO CHANGE IN CONTROL.
Nothing expressed or implied in this Agreement will create any right or duty on
the part of the Trust or the Executive to have the Executive remain in the
employ of the Trust prior to or following any Change in Control.  Any
termination of the employment of the Executive or the removal of the Executive
from any office or position in the Trust following the commencement of any
discussion with a third person that results in a Change in Control within 180
calendar days after such termination or removal will be deemed to be a
termination or removal of the Executive after a Change in Control for purposes
of this Agreement, entitling Executive to receive all benefits he would have
received under this Agreement had he been an employee of the Trust on the date
of the Change in Control.

         7.      CERTAIN DEFINED TERMS.  In addition to terms defined elsewhere
herein, the following terms have the following meanings when used herein with
initial capital letters:

         (a)     "Change in Control" means the occurrence during the term of
this Agreement of any of the following events:

                 (i)      the Trust is merged, consolidated, or reorganized
         into or with another corporation or other legal entity and the Trust
         is not the "surviving entity;"

                 (ii)     the Trust sells or otherwise transfers 50% or more of
         its assets to another corporation or other legal entity or in a series
         of related transactions;

                 (iii)  there is a report filed on Schedule 13D or Schedule
         14D-1 (or any successor schedule, form or report or item therein),
         each as promulgated pursuant to the Securities Exchange Act of 1934,
         as amended (the "Exchange Act"), disclosing that any person (as the
         term "person" is used in Section 13(d)(3) or Section 14(d)(2) of the
         Exchange Act) has become the beneficial owner (as the term "beneficial
         owner" is defined under Rule 13d-3 or any successor rule or regulation
         promulgated under the Exchange Act) of securities representing over
         33% of the combined voting power of the securities of the Trust
         entitled





                                       6
<PAGE>   7
         to vote generally in the election of Trust Managers (the "Voting
         Shares") of the Trust or could become the owner of over 33% of the
         Trust's Common Shares of Beneficial Interest through the conversion of
         the Trust's debt or equity securities;

                 (iv)     the Trust files a report or proxy statement with the
         Securities and Exchange Commission pursuant to the Exchange Act
         disclosing in response to Form 8-K or Schedule 14A (or any successor
         schedule, form or report or item therein) that a change in control of
         the Trust has occurred or will occur in the future pursuant to any
         then-existing contract or transaction; provided, however, a Change in
         Control shall be deemed to occur only when the transaction described
         in the Form 8-K or Schedule 14A (or any successor schedule, form or
         report or item therein) is consummated; or

                 (v)      if, during any period of 12 months, individuals who
         at the beginning of any such period constitute the Trust Managers of
         the Trust cease for any reason (other than death or disability) to
         constitute at least a majority thereof;

Notwithstanding the foregoing provisions of Section 7(a), a "Change in Control"
will not be deemed to have occurred for purposes of Section 7(a) solely because
(A) an entity in which the Trust, directly or indirectly, beneficially owns 50%
or more of the voting securities (a "Subsidiary"), or (B) any employee share
ownership plan or any other employee benefit plan of the Trust or any
Subsidiary either files or becomes obligated to file a report or a proxy
statement under or in response to Schedule 13D, Schedule 14D-1, Form 8-K, or
Schedule 14A (or any successor schedule, form, or report or item therein) under
the Exchange Act disclosing beneficial ownership by it of shares of Voting
Shares, whether in excess of 33% or otherwise, or because the Trust reports
that a change in control of the Trust has occurred or will occur in the future
by reason of such beneficial ownership.

         The determination as to which party to a merger, consolidation or
reorganization is the "surviving entity" within the meaning of Section 7(a)
shall be made on the basis of the relative equity interests of the shareholders
in the entity existing after the merger, consolidation or reorganization, as
follows: if following any merger, consolidation or reorganization the holders
of outstanding Voting Shares of the Trust immediately prior to the merger,
consolidation or reorganization own equity securities possessing more than 50%
of the voting power of the entity existing following the merger, consolidation
or reorganization, the Trust shall be the surviving entity.  In all other
cases, the Trust shall not be the surviving entity.  In making the
determination of ownership of equity securities by the shareholders of an
entity immediately after the merger, consolidation or reorganization pursuant
to this paragraph, equity securities which the shareholders owned immediately
before the merger, consolidation or reorganization as shareholders of another
party to the transaction shall be disregarded.  Further, for purposes of this
paragraph only, outstanding voting securities of an entity shall be calculated
by assuming the conversion of all equity securities convertible (immediately or
at some future time) into shares entitled to vote.





                                       7
<PAGE>   8
         (b)     "Employee Benefits" means the perquisites, benefits and service
credit for benefits as provided under any and all employee retirement income
and welfare benefit policies, plans, programs or arrangements in which the
Executive is entitled to participate, including without limitation any share
option, share purchase, share appreciation, dividend equivalent rights,
savings, pension, supplemental executive retirement or other retirement income
or welfare benefit, deferred compensation, incentive compensation, group or
other life, health, medical/hospital, or other insurance (whether funded by
actual insurance or self-insured by the Trust), disability, salary
continuation, expense reimbursement, and other employee benefit policies,
plans, programs or arrangements that may now exist or any equivalent successor
policies, plans, programs or arrangements that may be adopted hereafter by the
Trust, providing perquisites, benefits and service credit for benefits at least
as great in the aggregate as are payable thereunder prior to a Change in
Control.

         (c)     The term "Severance Benefit" shall mean an amount equal to
2.50 times (i) the Executive's annualized base salary rate as of the date of
the first event constituting a Change in Control or, if higher, (ii) the
Executive's highest base salary received for any year in the previous five
fiscal years immediately preceding the first event constituting a Change in
Control, plus 2.50 times Executive's targeted bonus amount for the fiscal year
in which the first event constituting a Change in Control occurs.  If Executive
has been employed by the Trust for less than five years, this Section 7(c)
shall be deemed to mean such actual period of employment.

         (d)     "Severance Period" means the period of time commencing on the
date of an occurrence of each Change in Control and continuing until the
earliest of (i) the expiration of one year after each occurrence of an event
constituting a Change in Control, (ii) the Executive's death, or (iii) the
Executive's attainment of age 65.

         8.      TERM.  The term of this Agreement shall be deemed to commence
and be effective as of the date of this Agreement and shall continue for a
five-year term and shall automatically renew for one-year terms unless either
party gives notice of its intent not to renew at least 180 days prior to the
end of any term or, unless earlier terminated in accordance with the provisions
hereof.

         9.      TERMINATION.  Except with respect to the provisions of this
Agreement that provide for payments to be made to Executive after termination
of employment, this Agreement shall terminate automatically without further
action by either of the parties hereto upon the death or permanent disability
of Executive or the termination of Executive's employment with the Trust for
any reason or no reason, in accordance with Executive's status as an employee
at will.  As used herein, the term "permanent disability" means physical or
mental disability or both that is determined by the Trust, in its reasonable
discretion, to substantially impair the ability of Executive to perform the
day-to-day functions normally performed by Executive if the disability is
suffered (or is reasonably expected to be suffered) by Executive for a period
of not less than six consecutive calendar months.  Notwithstanding the
foregoing and except as set forth in Section 6, Executive (or his estate, heirs
or personal representatives, as applicable) shall not be entitled to





                                       8
<PAGE>   9
severance compensation except to the extent that a Change in Control of the
Trust occurs 180 days or less prior to the termination of this Agreement.

         10.     REPRESENTATION BY EXECUTIVE.   Executive hereby represents and
warrants to the Trust that there are no agreements or understandings that would
make unlawful his execution or delivery of this Agreement.

         11.     NOTICES.  All notices, renewals and other communications
required or permitted under this Agreement must be in writing and shall be
deemed to have been given if delivered or mailed, by certified mail, first
class postage prepaid, to the parties at the addresses set forth in this
Agreement, as the same may be changed in writing by the parties from time to
time.

         12.     ENTIRE AGREEMENT.  The parties expressly agree that this
Agreement is contractual in nature and not a mere recital, and that it contains
all the terms and conditions of the agreement between the parties with respect
to the matters set forth herein.  All prior negotiations, agreements,
arrangements, understandings and statements between the parties relating to the
matters set forth herein that have occurred at any time or contemporaneously
with the execution of this Agreement (including, but not limited to, the Prior
Agreement) are superseded and merged into this completely integrated Agreement.
The Recitals set forth above shall be deemed to be part of this Agreement.

         13.     GOVERNING LAW.  This Agreement was negotiated and is
performable in Dallas County, Texas and shall be governed by the laws of the
State of Texas without giving effect to principles of conflicts of law.

         14.     SEVERABILITY.  If any provision of this Agreement is held to
be illegal, invalid or unenforceable under any present or future law, such
provisions shall be fully severable, and this Agreement shall be construed and
enforced as if such illegal, invalid or unenforceable provision had never
comprised a part hereof, the remaining provisions of this Agreement shall
remain in full force and effect and shall not be affected by the illegal,
invalid or unenforceable provision or by its severance herefrom, and in lieu of
such provision, there shall be added automatically as a part of this Agreement,
a legal, valid and enforceable provision as similar in terms to such illegal,
invalid or unenforceable provision as may be possible, and the Trust and
Executive hereby request the court or any arbitrator to whom disputes relating
to this Agreement are submitted to reform the otherwise unenforceable covenant
in accordance with the proceeding provision.

         15.     COUNTERPARTS.  This Agreement may be executed in multiple
identical counterparts, each of which shall be deemed an original, and all of
which taken together shall constitute but one and the same instrument.  In
making proof of this Agreement, it shall not be necessary to produce or account
for more than one counterpart executed by the party sought to be charged with
performance hereunder.





                                       9
<PAGE>   10
         16.     ASSIGNMENT AND DELEGATION.  All rights, covenants and
agreements of the Trust set forth in this Agreement shall, unless otherwise
provided herein, be binding upon and inure to the benefit of the Trust's
respective successors and assigns.  All rights, covenants and agreements of
Executive set forth in this Agreement shall, unless otherwise provided herein,
not be assignable by Executive, and shall be considered personal to Executive
for all purposes.

         17.     DEATH.  If Executive dies before receiving payment under this
Agreement, a lump-sum payment shall be made to Executive's estate or designated
beneficiary.

         18.     WAIVER OF BREACH.  Failure by either party to demand strict
compliance with any of the terms, covenants or provisions hereof shall not be
deemed a waiver of the term, covenant or provision, nor any waiver or
relinquishment by the Trust of any power at any other time or times.

         19.     WITHHOLDING OF TAXES.  The Trust shall withhold taxes from
amounts paid pursuant to this Agreement as required by law, and, to the extent
deemed necessary by the Trust, in good faith.

         20.     VESTING OF BENEFITS.  Notwithstanding anything in this
Agreement, the Trust's Employee and Trust Manager Incentive Share Plan (the
"Plan"), any agreement entered into under the Plan, or under any retirement,
pension, profit sharing or other similar plan, upon the occurrence of a Change
in Control, all deferred or unvested portions of any award made to Executive
under any of the foregoing plans and agreements shall automatically become
fully vested in Executive and shall be in effect and redeemable by or payable
to Executive, or Executive's designated beneficiary or estate, on the same
conditions (other than vesting) as would have applied had the Change in Control
not occurred.  All unvested awards under the Plan shall immediately vest upon
the Change in Control and the Executive shall have the right to exercise any
vested awards during the balance of the awards' term.

         IN WITNESS WHEREOF, the undersigned have executed and delivered this
Agreement as of the date first set forth above.


                                  AMERICAN INDUSTRIAL PROPERTIES REIT
                                  
                                  
                                  By:/s/ Charles W. Wolcott 
                                     -----------------------------------
                                  Title: President and CEO
                                        --------------------------------
                                  
                                  Notice Address:  6210 North Beltline 
                                                   Suite 170 
                                                   Irving, Texas 75063-2656





                                       10
<PAGE>   11
                                  EXECUTIVE:



                                  /s/ Marc A. Simpson 
                                  ------------------------------------------
                                  Marc A. Simpson

                                  Notice Address: 
                                                  --------------------------
                                                  --------------------------
                                                  --------------------------




                                       11

<PAGE>   1
                                                                   EXHIBIT 10.3

                    SEVERANCE AND CHANGE IN CONTROL AGREEMENT


         This Severance and Change in Control Agreement (this "Agreement") is
made and entered into as of this 29th day of April, 1998, by and between
American Industrial Properties REIT, a Texas real estate investment trust (the
"Trust") and David B. Warner ("Executive").

                                    RECITALS

         WHEREAS, Executive is currently employed by the Trust as Vice President
of Real Estate Operations;

         WHEREAS, to encourage Executive to remain employed with the Trust, the
Trust desires to provide Executive with an opportunity for certain severance
compensation in the event of a Change in Control (as defined below) of the Trust
on the terms and conditions set forth herein;

         WHEREAS, the Trust and Employee each recognize and hereby acknowledge
that Executive's employment with the Trust is and shall continue to be
terminable at will, without prior notice, by either the Trust or Executive; and

         WHEREAS, the Trust and Executive each hereby acknowledge that this
Agreement is not intended to be, and shall not be construed as, an express or
implied contract of employment between the Trust and Executive;

         WHEREAS, the parties agree that this Agreement shall replace and
supercede that certain Bonus and Severance Agreement between the parties hereto
dated as of March 13, 1996 (the "Prior Agreement");

         NOW, THEREFORE, for and in consideration of the mutual promises
hereinafter contained and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged by the parties hereto, the Trust
and Executive hereby agree as follows:

                                   AGREEMENTS

         1.     CHANGE IN CONTROL. Upon the occurrence of a Change in Control,
the Executive will be entitled to the benefits provided by Section 2.

         2.     SEVERANCE BENEFITS. (a) Following the occurrence of a Change in
Control, the Trust will pay to the Executive the Severance Benefit (as defined
below) in immediately available funds, in United States Dollars, within five
business days after the first occurrence of a Change in Control. In addition,
during the Severance Period, the Trust will arrange to provide the Executive
Employee Benefits that are welfare benefits (but not share options, share
purchase, share appreciation, dividend equivalent rights or similar compensatory
benefits) substantially
<PAGE>   2
similar to those which the Executive was receiving or entitled to receive
immediately prior to the Change in Control. Such one year period will be
considered service with the Trust for the purpose of determining service credits
and benefits due and payable to the Executive under the Trust's retirement
income, supplemental executive retirement, and other benefit plans of the Trust
applicable to the Executive, the Executive's dependents, or the Executive's
beneficiaries immediately prior to the Change in Control. If and to the extent
that any benefit described in the immediately preceding sentence is not or
cannot be paid or provided under any policy, plan, program or arrangement of the
Trust, then the Trust will itself pay or provide for the payment of such
Employee Benefits to the Executive, and, if applicable, the Executive's
dependents and beneficiaries. Without otherwise limiting the purposes or effect
of Section 3, Employee Benefits otherwise receivable by the Executive pursuant
to this Section 2(a) will be reduced to the extent comparable welfare benefits
are actually received by the Executive from another employer during the
Severance Period following the Executive's termination date.

         (b)    There will be no right of set-off or counterclaim in respect of
any claim, debt or obligation against any payment to or benefit for the
Executive provided for in this Agreement, except as expressly provided in the
last sentence of Section 2(a).

         (c)    Notwithstanding any other provision hereof, the parties'
respective rights and obligations under this Section 2 and under Sections 4 and
5 will survive any termination or expiration of this Agreement following a
Change in Control.

         3.     NO MITIGATION OBLIGATION. Executive will not be required to
mitigate the amount of any payment provided for in this Agreement by seeking
other employment.

         4.     CERTAIN ADDITIONAL PAYMENTS BY THE TRUST. (a) Notwithstanding
anything in this Agreement to the contrary, in the event it is determined (as
hereafter provided) that any payment or distribution by the Trust to or for the
benefit of the Executive, whether paid or payable or distributed or
distributable pursuant to the terms of this Agreement or otherwise pursuant to
or by reason of any other agreement, policy, plan, program or arrangement,
including without limitation any share option, share appreciation right,
dividend equivalent right, restricted shares or similar right, the lapse or
termination of any restriction on or the vesting or exercise ability of any of
the foregoing (any such payment or distribution, a "Payment"), would be subject
to the excise tax imposed by Section 4999 of the Internal Revenue Code of 1986,
as amended (the "Code") (or any successor provision thereto), by reason of being
considered "contingent on a change in ownership or control" of the Trust, within
the meaning of Section 280G of the Code (or any successor provision thereto) or
to any similar tax imposed by state or local law, or any interest or penalties
with respect to such tax (such tax or taxes, together with any such interest and
penalties, being hereafter collectively referred to as the "Excise Tax"), then
the Executive will be entitled to receive an additional payment or payments
(collectively, a "Gross-Up Payment"); provided, however, that no Gross-up
Payment will be made with respect to the Excise Tax, if any, attributable to (A)
any incentive share option ("ISO") granted prior to the execution of this
Agreement or (B) any share appreciation or similar right, whether or not
limited, granted in


                                       2
<PAGE>   3
tandem with any ISO described in clause (A) of this sentence. The Gross-Up
Payment will be in an amount such that, after payment by the Executive of all
taxes (including any interest or penalties imposed with respect to such taxes),
including any Excise Tax imposed upon the Gross-Up Payment, the Executive will
have received an amount of the Gross-Up Payment equal to the Excise Tax imposed
upon the Payment.

         (b)    Subject to the provisions of Section 4(f), all determinations
required to be made under this Section 4, including whether an Excise Tax is
payable by the Executive and the amount of such Excise Tax and whether a
Gross-Up Payment is required to be paid by the Trust to the Executive and the
amount of such Gross-Up Payment, if any, will be made by a nationally recognized
accounting firm (the "Accounting Firm") selected by the Executive in the
Executive's sole discretion. The Executive will direct the Accounting Firm to
submit its determination and detailed supporting calculations to both the Trust
and the Executive within 30 calendar days after the Executive's termination
date, and any such other time or times as may be requested by the Trust or the
Executive. If the Accounting Firm determines that any Excise Tax is payable by
the Executive, the Trust will pay the required Gross-Up Payment to the Executive
within five business days after receipt of such determination and calculations
with respect to any Payment to the Executive. If the Accounting Firm determines
that no Excise Tax is payable by the Executive, it will, at the same time as it
makes such determination, furnish the Trust and the Executive an opinion that
the Executive has substantial authority not to report any Excise Tax on the
Executive's federal, state or local income or other tax return. As a result of
the uncertainty in the application of Section 4999 of the Code (or any successor
provision thereto) and the possibility of similar uncertainty regarding
applicable state or local tax law at the time of any determination by the
Accounting Firm hereunder, it is possible that Gross-Up Payments which will not
have been made by the Trust should have been made (an "Underpayment"),
consistent with the calculations required to be made hereunder. In the event
that the Trust exhausts or fails to pursue its remedies pursuant to Section 4(f)
and the Executive thereafter is required to make a payment of any Excise Tax,
the Executive will direct the Accounting Firm to determine the amount of the
Underpayment that has occurred and to submit its determination and detailed
supporting calculations to both the Trust and the Executive as promptly as
possible. Any such Underpayment will be promptly paid by the Trust to, or for
the benefit of, the Executive within five business days after receipt of such
determination and calculations.

         (c)    The Trust and the Executive will each provide the Accounting
Firm access to and copies of any books, records and documents in the possession
of the Trust or the Executive, as the case may be, reasonably requested by the
Accounting Firm, and otherwise cooperate with the Accounting Firm in connection
with the preparation and issuance of the determinations and calculations
contemplated by Section 4(b). Any determination by the Accounting Firm as to the
amount of the Gross-Up Payment will be binding upon the Trust and the Executive.

         (d)    The federal, state and local income or other tax returns filed
by the Executive will be prepared and filed on a consistent basis with the
determination of the Accounting Firm with respect to the Excise Tax payable by
the Executive. The Executive will make proper payment of


                                       3
<PAGE>   4
the amount of any Excise Payment and, at the request of the Trust, provide to
the Trust true and correct copies (with any amendments) of the Executive's
federal income tax return as filed with the Internal Revenue Service and
corresponding state and local tax returns, if relevant, as filed with the
applicable taxing authority, and such other documents reasonably requested by
the Trust, evidencing such payment. If prior to the filing of the Executive's
federal income tax return, or corresponding state or local tax return, if
relevant, the Accounting Firm determines that the amount of the Gross-Up Payment
should be reduced, the Executive will within five business days pay to the Trust
the amount of such reduction.

         (e)    The fees and expenses of the Accounting Firm for its services in
connection with the determinations and calculations contemplated by Section 4(b)
will be borne by the Trust. If such fees and expenses are initially paid by the
Executive, the Trust will reimburse the Executive the full amount of such fees
and expenses within five business days after receipt from the Executive of a
statement therefor and reasonable evidence of the Executive's payment thereof.

         (f)    The Executive will notify the Trust in writing of any claim by
the Internal Revenue Service or any other taxing authority that, if successful,
would require the payment by the Trust of a Gross-Up Payment. Such notification
will be given as promptly as practicable but no later than 10 business days
after the Executive actually receives notice of such claim and the Executive
will further apprise the Trust of the nature of such claim and the date on which
such claim is requested to be paid (in each case, to the extent known by the
Executive). The Executive will not pay such claim prior to the earlier of (i)
the expiration of the 30-calendar day period following the date on which the
Executive gives such notice to the Trust and (ii) the date that any payment of
amount with respect to such claim is due. If the Trust notifies the Executive in
writing prior to the expiration of such period that it desires to contest such
claim, the Executive will:

                (A) provide the Trust with any written records or documents in
the Executive's possession relating to such claim reasonably requested by the
Trust;

                (B) take such action in connection with contesting such claim
as the Trust may reasonably request in writing from time to time, including
without limitation accepting legal representation with respect to such claim by
an attorney competent in respect of the subject matter and reasonably selected
by the Trust;

                (C) cooperate with the Trust in good faith in order effectively
to contest such claim; and

                (D) permit the Trust to participate in any proceedings relating
to such claims;

provided, however, that the Trust will bear and pay directly all costs and
expenses (including interest and penalties) incurred in connection with such
contest and will indemnify and hold harmless the Executive, on an after-tax
basis, for and against any Excise Tax or income tax, including interest and
penalties with respect thereto, imposed as a result of such representation and


                                       4
<PAGE>   5
payment of costs and expenses. Without limiting the foregoing provisions of this
Section 4(f), the Trust will control all proceedings taken in connection with
the contest of any claim contemplated by this Section 4(f) and, at its sole
option, may pursue or forego any and all administrative appeals, proceedings,
hearings and conferences with the taxing authority in respect of such claim
(provided, however, that the Executive may participate therein at the
Executive's own cost and expense) and may, at its option, either direct the
Executive to pay the tax claimed and sue for a refund or contest the claim in
any permissible manner, and the Executive will 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 Trust may determine;
provided, however, that if the Trust directs the Executive to pay the tax
claimed and sue for a refund, the Trust will advance the amount of such payment
to the Executive on an interest-free basis and will indemnify and hold the
Executive harmless, on an after-tax basis, from any Excise Tax or income or
other tax, including interest or penalties with respect thereto, imposed with
respect to such advance; and provided further, however, that any extension of
the statute of limitations relating to payment of taxes for the taxable year of
the Executive with respect to which the contested amount is claimed to be due is
limited solely to such contested amount. The Trust's control of any such
contested claim will be limited to issues with respect to which a Gross-Up
Payment would be payable hereunder and the Executive will be entitled to settle
or contest, as the case may be, any other issue raised by the Internal Revenue
Service or any other taxing authority.

         (g)    If, after the receipt by the Executive of an amount advanced by
the Trust pursuant to Section 4(f), the Executive receives any refund with
respect to such claim, the Executive will (subject to the Trust's complying with
the requirements of Section 4(f)) pay to the Trust the amount of such refund
(together with any interest paid or credited thereon after any taxes applicable
thereto) within 30 calendar days after such receipt and the Trust's satisfaction
of all accrued obligations under this Agreement. If, after the receipt by the
Executive of any amount advanced by the Trust pursuant to Section 4(f), a
determination is made that the Executive will not be entitled to any refund with
respect to such claim and the Trust does not notify the Executive in writing of
its intent to contest such determination prior to the expiration of 30 calendar
days after such determination, then such advance will be forgiven and will not
be required to be repaid and the amount of any such advance will offset, to the
extent thereof, the amount of Gross-Up Payment required to be paid by the Trust
to the Executive pursuant to this Section 4.

         5.    LEGAL FEES AND EXPENSES; SECURITY. It is the intent of the Trust
that the Executive not be required to incur legal fees and the related expenses
associated with the interpretation, enforcement or defense of the Executive's
rights to compensation upon a Change in Control by litigation or otherwise
because the cost and expense thereof would substantially detract from the
benefits intended to be extended to the Executive hereunder. Accordingly, if it
should appear to the Executive that the Trust has failed to comply with any of
its obligations under this Agreement or in the event that the Trust or any other
person takes or threatens to take any action to declare the agreement to pay
Executive compensation upon a Change in Control void or unenforceable, or
institutes any litigation or other action or proceeding designed to deny, or to
recover from, the Executive the benefits provided or intended to be provided to
the Executive hereunder, the Trust


                                       5
<PAGE>   6
irrevocably authorizes the Executive from time to time to retain counsel of the
Executive's choice, at the expense of the Trust as hereinafter provided, to
advise and represent the Executive in connection with any such interpretation,
enforcement or defense, including without limitation the initiation or defense
of any litigation or other legal action, whether by or against the Trust or any
Trust Manager, officer, shareholder, or other person affiliated with the Trust,
in any jurisdiction. Notwithstanding any existing or prior attorney-client
relationship between the Trust and such counsel, the Trust irrevocably consents
to the Executive's entering into an attorney-client relationship with such
counsel, and in that connection the Trust and the Executive agree that a
confidential relationship will exist between the Executive and such counsel.
Without regard to whether the Executive prevails, in whole or in part, in
connection with any of the foregoing, the Trust will pay and be solely
financially responsible for any and all attorneys' and related fees and expenses
incurred by the Executive in connection with any of the foregoing.

         6.    EMPLOYMENT RIGHTS; TERMINATION PRIOR TO CHANGE IN CONTROL.
Nothing expressed or implied in this Agreement will create any right or duty on
the part of the Trust or the Executive to have the Executive remain in the
employ of the Trust prior to or following any Change in Control. Any termination
of the employment of the Executive or the removal of the Executive from any
office or position in the Trust following the commencement of any discussion
with a third person that results in a Change in Control within 180 calendar days
after such termination or removal will be deemed to be a termination or removal
of the Executive after a Change in Control for purposes of this Agreement,
entitling Executive to receive all benefits he would have received under this
Agreement had he been an employee of the Trust on the date of the Change in
Control.

         7.    CERTAIN DEFINED TERMS. In addition to terms defined elsewhere
herein, the following terms have the following meanings when used herein with
initial capital letters:

         (a)   "Change in Control" means the occurrence during the term of this
Agreement of any of the following events:

               (i)   the Trust is merged, consolidated, or reorganized into or
         with another corporation or other legal entity and the Trust is not the
         "surviving entity;"

               (ii)  the Trust sells or otherwise transfers 50% or more of its
         assets to another corporation or other legal entity or in a series of
         related transactions;

               (iii) there is a report filed on Schedule 13D or Schedule 14D-1
         (or any successor schedule, form or report or item therein), each as
         promulgated pursuant to the Securities Exchange Act of 1934, as amended
         (the "Exchange Act"), disclosing that any person (as the term "person"
         is used in Section 13(d)(3) or Section 14(d)(2) of the Exchange Act)
         has become the beneficial owner (as the term "beneficial owner" is
         defined under Rule 13d-3 or any successor rule or regulation 
         promulgated under the Exchange Act) of securities representing over 33%
         of the combined voting power of the securities of the Trust entitled


                                       6
<PAGE>   7
         to vote generally in the election of Trust Managers (the "Voting
         Shares") of the Trust or could become the owner of over 33% of the
         Trust's Common Shares of Beneficial Interest through the conversion of
         the Trust's debt or equity securities;

               (iv)    the Trust files a report or proxy statement with the
         Securities and Exchange Commission pursuant to the Exchange Act
         disclosing in response to Form 8-K or Schedule 14A (or any successor
         schedule, form or report or item therein) that a change in control of
         the Trust has occurred or will occur in the future pursuant to any
         then-existing contract or transaction provided, however, a Change in
         Control shall be deemed to occur only when the transaction described in
         the Form 8-K or Schedule 14A (or any successor schedule, form or report
         or item therein) is consummated; or

               (v)     if, during any period of 12 months, individuals who at
         the beginning of any such period constitute the Trust Managers of the
         Trust cease for any reason (other than death or disability) to
         constitute at least a majority thereof;

Notwithstanding the foregoing provisions of Section 7(a), a "Change in Control"
will not be deemed to have occurred for purposes of Section 7(a) solely because
(A) an entity in which the Trust, directly or indirectly, beneficially owns 50%
or more of the voting securities (a "Subsidiary"), or (B) any employee share
ownership plan or any other employee benefit plan of the Trust or any Subsidiary
either files or becomes obligated to file a report or a proxy statement under or
in response to Schedule 13D, Schedule 14D-1, Form 8-K, or Schedule 14A (or any
successor schedule, form, or report or item therein) under the Exchange Act
disclosing beneficial ownership by it of shares of Voting Shares, whether in
excess of 33% or otherwise, or because the Trust reports that a change in
control of the Trust has occurred or will occur in the future by reason of such
beneficial ownership.

         The determination as to which party to a merger, consolidation or
reorganization is the "surviving entity" within the meaning of Section 7(a)
shall be made on the basis of the relative equity interests of the shareholders
in the entity existing after the merger, consolidation or reorganization, as
follows: if following any merger, consolidation or reorganization the holders of
outstanding Voting Shares of the Trust immediately prior to the merger,
consolidation or reorganization own equity securities possessing more than 50%
of the voting power of the entity existing following the merger, consolidation
or reorganization, the Trust shall be the surviving entity. In all other cases,
the Trust shall not be the surviving entity. In making the determination of
ownership of equity securities by the shareholders of an entity immediately
after the merger, consolidation or reorganization pursuant to this paragraph,
equity securities which the shareholders owned immediately before the merger,
consolidation or reorganization as shareholders of another party to the
transaction shall be disregarded. Further, for purposes of this paragraph only,
outstanding voting securities of an entity shall be calculated by assuming the
conversion of all equity securities convertible (immediately or at some future
time) into shares entitled to vote.


                                       7
<PAGE>   8
         (b)   "Employee Benefits" means the perquisites, benefits and service
credit for benefits as provided under any and all employee retirement income and
welfare benefit policies, plans, programs or arrangements in which the Executive
is entitled to participate, including without limitation any share option, share
purchase, share appreciation, dividend equivalent rights, savings, pension,
supplemental executive retirement or other retirement income or welfare benefit,
deferred compensation, incentive compensation, group or other life, health,
medical/hospital, or other insurance (whether funded by actual insurance or
self-insured by the Trust), disability, salary continuation, expense
reimbursement, and other employee benefit policies, plans, programs or
arrangements that may now exist or any equivalent successor policies, plans,
programs or arrangements that may be adopted hereafter by the Trust, providing
perquisites, benefits and service credit for benefits at least as great in the
aggregate as are payable thereunder prior to a Change in Control.

         (c)   The term "Severance Benefit" shall mean an amount equal to 2.50
times (i) the Executive's annualized base salary rate as of the date of the
first event constituting a Change in Control or, if higher, (ii) the Executive's
highest base salary received for any year in the previous five fiscal years
immediately preceding the first event constituting a Change in Control, plus
2.50 times Executive's targeted bonus amount for the fiscal year in which the
first event constituting a Change in Control occurs. If Executive has been
employed by the Trust for less than five years, this Section 7(c) shall be
deemed to mean such actual period of employment.

         (d)   "Severance Period" means the period of time commencing on the
date of an occurrence of each Change in Control and continuing until the
earliest of (i) the expiration of one year after each occurrence of an event
constituting a Change in Control, (ii) the Executive's death, or (iii) the
Executive's attainment of age 65.

         8.    TERM. The term of this Agreement shall be deemed to commence and
be effective as of the date of this Agreement and shall continue for a five-year
term and shall automatically renew for one-year terms unless either party gives
notice of its intent not to renew at least 180 days prior to the end of any term
or, unless earlier terminated in accordance with the provisions hereof.

         9.    TERMINATION. Except with respect to the provisions of this
Agreement that provide for payments to be made to Executive after termination of
employment, this Agreement shall terminate automatically without further action
by either of the parties hereto upon the death or permanent disability of
Executive or the termination of Executive's employment with the Trust for any
reason or no reason, in accordance with Executive's status as an employee at
will. As used herein, the term "permanent disability" means physical or mental
disability or both that is determined by the Trust, in its reasonable
discretion, to substantially impair the ability of Executive to perform the
day-to-day functions normally performed by Executive if the disability is
suffered (or is reasonably expected to be suffered) by Executive for a period of
not less than six consecutive calendar months. Notwithstanding the foregoing and
except as set forth in Section 6, Executive (or his estate, heirs or personal
representatives, as applicable) shall not be entitled to


                                       8
<PAGE>   9
severance compensation except to the extent that a Change in Control of the
Trust occurs 180 days or less prior to the termination of this Agreement.

         10.   REPRESENTATION BY EXECUTIVE. Executive hereby represents and
warrants to the Trust that there are no agreements or understandings that would
make unlawful his execution or delivery of this Agreement.

         11.   NOTICES. All notices, renewals and other communications required
or permitted under this Agreement must be in writing and shall be deemed to have
been given if delivered or mailed, by certified mail, first class postage
prepaid, to the parties at the addresses set forth in this Agreement, as the
same may be changed in writing by the parties from time to time.

         12.   ENTIRE AGREEMENT. The parties expressly agree that this Agreement
is contractual in nature and not a mere recital, and that it contains all the
terms and conditions of the agreement between the parties with respect to the
matters set forth herein. All prior negotiations, agreements, arrangements,
understandings and statements between the parties relating to the matters set
forth herein that have occurred at any time or contemporaneously with the
execution of this Agreement (including, but not limited to, the Prior Agreement)
are superseded and merged into this completely integrated Agreement. The
Recitals set forth above shall be deemed to be part of this Agreement.

         13.   GOVERNING LAW. This Agreement was negotiated and is performable
in Dallas County, Texas and shall be governed by the laws of the State of Texas
without giving effect to principles of conflicts of law.

         14.   SEVERABILITY. If any provision of this Agreement is held to be
illegal, invalid or unenforceable under any present or future law, such
provisions shall be fully severable, and this Agreement shall be construed and
enforced as if such illegal, invalid or unenforceable provision had never
comprised a part hereof, the remaining provisions of this Agreement shall remain
in full force and effect and shall not be affected by the illegal, invalid or
unenforceable provision or by its severance herefrom, and in lieu of such
provision, there shall be added automatically as a part of this Agreement, a
legal, valid and enforceable provision as similar in terms to such illegal,
invalid or unenforceable provision as may be possible, and the Trust and
Executive hereby request the court or any arbitrator to whom disputes relating
to this Agreement are submitted to reform the otherwise unenforceable covenant
in accordance with the proceeding provision.

         15.   COUNTERPARTS. This Agreement may be executed in multiple
identical counterparts, each of which shall be deemed an original, and all of
which taken together shall constitute but one and the same instrument. In making
proof of this Agreement, it shall not be necessary to produce or account for
more than one counterpart executed by the party sought to be charged with
performance hereunder.


                                       9
<PAGE>   10
         16.   ASSIGNMENT AND DELEGATION. All rights, covenants and agreements
of the Trust set forth in this Agreement shall, unless otherwise provided
herein, be binding upon and inure to the benefit of the Trust's respective
successors and assigns. All rights, covenants and agreements of Executive set
forth in this Agreement shall, unless otherwise provided herein, not be
assignable by Executive, and shall be considered personal to Executive for all
purposes.

         17.   DEATH. If Executive dies before receiving payment under this
Agreement, a lump-sum payment shall be made to Executive's estate or designated
beneficiary.

         18.   WAIVER OF BREACH. Failure by either party to demand strict
compliance with any of the terms, covenants or provisions hereof shall not be
deemed a waiver of the term, covenant or provision, nor any waiver or
relinquishment by the Trust of any power at any other time or times.

         19.   WITHHOLDING OF TAXES. The Trust shall withhold taxes from amounts
paid pursuant to this Agreement as required by law, and, to the extent deemed
necessary by the Trust, in good faith.

         20.   VESTING OF BENEFITS. Notwithstanding anything in this Agreement,
the Trust's Employee and Trust Manager Incentive Share Plan (the "Plan"), any
agreement entered into under the Plan, or under any retirement, pension, profit
sharing or other similar plan, upon the occurrence of a Change in Control, all
deferred or unvested portions of any award made to Executive under any of the
foregoing plans and agreements shall automatically become fully vested in
Executive and shall be in effect and redeemable by or payable to Executive, or
Executive's designated beneficiary or estate, on the same conditions (other than
vesting) as would have applied had the Change in Control not occurred. All
unvested awards under the Plan shall immediately vest upon the Change in Control
and the Executive shall have the right to exercise any vested awards during the
balance of the awards' term.

         IN WITNESS WHEREOF, the undersigned have executed and delivered this
Agreement as of the date first set forth above.


                                    AMERICAN INDUSTRIAL PROPERTIES REIT


                                    By: /s/ Charles W. Wolcott
                                        --------------------------------------
                                    Title: President and CEO
                                           -----------------------------------
                                    Notice Address:  6210 North Beltline
                                                     Suite 170
                                                     Irving, Texas 75063-2656


                                       10
<PAGE>   11
                                    EXECUTIVE:


                                    /s/ David B. Warner
                                    -----------------------------------------
                                    David B. Warner

                                    Notice Address:
                                                       ----------------------
                                                       ----------------------
                                                       ----------------------



                                      11

<PAGE>   1
                                                                    EXHIBIT 10.4

                   SEVERANCE AND CHANGE IN CONTROL AGREEMENT


         This Severance and Change in Control Agreement (this "Agreement") is
made and entered into as of this 29th day of April, 1998, by and between
American Industrial Properties REIT, a Texas real estate investment trust (the
"Trust") and Lewis D. Friedland ("Executive").

                                    RECITALS

         WHEREAS, Executive is currently employed by the Trust as Vice
President and Chief Investment Officer;

         WHEREAS, to encourage Executive to remain employed with the Trust, the
Trust desires to provide Executive with an opportunity for certain severance
compensation in the event of a Change in Control (as defined below) of the
Trust on the terms and conditions set forth herein;

         WHEREAS, the Trust and Employee each recognize and hereby acknowledge
that Executive's employment with the Trust is and shall continue to be
terminable at will, without prior notice, by either the Trust or Executive; and

         WHEREAS, the Trust and Executive each hereby acknowledge that this
Agreement is not intended to be, and shall not be construed as, an express or
implied contract of employment between the Trust and Executive;

         WHEREAS, the parties agree that this Agreement shall replace and
supercede that certain Bonus and Severance Agreement between the parties hereto
dated as of May 12, 1997 (the "Prior  Agreement");

         NOW, THEREFORE, for and in consideration of the mutual promises
hereinafter contained and other good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged by the parties hereto, the
Trust and Executive hereby agree as follows:

                                   AGREEMENTS

         1.       CHANGE IN CONTROL. Upon the occurrence of a Change in
Control, the Executive will be entitled to the benefits provided by Section 2.

         2.      SEVERANCE BENEFITS.    (a) Following the occurrence of a
Change in Control, the Trust will pay to the Executive the Severance Benefit
(as defined below) in immediately available funds, in United States Dollars,
within five business days after the first occurrence of a Change in Control.
In addition, during the Severance Period, the Trust will arrange to provide the
Executive Employee Benefits that are welfare benefits (but not share options,
share purchase, share appreciation, dividend equivalent rights or similar
compensatory benefits) substantially
<PAGE>   2
similar to those which the Executive was receiving or entitled to receive
immediately prior to the Change in Control.  Such one year period will be
considered service with the Trust for the purpose of determining service
credits and benefits due and payable to the Executive under the Trust's
retirement income, supplemental executive retirement, and other benefit plans
of the Trust applicable to the Executive, the Executive's dependents, or the
Executive's beneficiaries immediately prior to the Change in Control.  If and
to the extent that any benefit described in the immediately preceding sentence
is not or cannot be paid or provided under any policy, plan, program or
arrangement of the Trust, then the Trust will itself pay or provide for the
payment of such Employee Benefits to the Executive, and, if applicable, the
Executive's dependents and beneficiaries.  Without otherwise limiting the
purposes or effect of Section 3, Employee Benefits otherwise receivable by the
Executive pursuant to this Section 2(a) will be reduced to the extent
comparable welfare benefits are actually received by the Executive from another
employer during the Severance Period following the Executive's termination
date.

         (b)     There will be no right of set-off or counterclaim in respect
of any claim, debt or obligation against any payment to or benefit for the
Executive provided for in this Agreement, except as expressly provided in the
last sentence of Section 2(a).

         (c)     Notwithstanding any other provision hereof, the parties'
respective rights and obligations under this Section 2 and under Sections 4 and
5 will survive any termination or expiration of this Agreement following a
Change in Control.

         3.      NO MITIGATION OBLIGATION.  Executive will not be required to
mitigate the amount of any payment provided for in this Agreement by seeking
other employment.

         4.      CERTAIN ADDITIONAL PAYMENTS BY THE TRUST.    (a)
Notwithstanding anything in this Agreement to the contrary, in the event it is
determined (as hereafter provided) that any payment or distribution by the
Trust to or for the benefit of the Executive, whether paid or payable or
distributed or distributable pursuant to the terms of this Agreement or
otherwise pursuant to or by reason of any other agreement, policy, plan,
program or arrangement, including without limitation any share option, share
appreciation right, dividend equivalent right, restricted shares or similar
right, the lapse or termination of any restriction on or the vesting or
exercise ability of any of the foregoing (any such payment or distribution, a
"Payment"), would be subject to the excise tax imposed by Section 4999 of the
Internal Revenue Code of 1986, as amended (the "Code") (or any successor
provision thereto), by reason of being considered "contingent on a change in
ownership or control" of the Trust, within the meaning of Section 280G of the
Code (or any successor provision thereto) or to any similar tax imposed by
state or local law, or any interest or penalties with respect to such tax (such
tax or taxes, together with any such interest and penalties, being hereafter
collectively referred to as the "Excise Tax"), then the Executive will be
entitled to receive an additional payment or payments (collectively, a
"Gross-Up Payment"); provided, however, that no Gross-up Payment will be made
with respect to the Excise Tax, if any, attributable to (A) any incentive share
option ("ISO") granted prior to the execution of this Agreement or (B) any
share appreciation or similar right, whether or not limited, granted in





                                       2
<PAGE>   3
tandem with any ISO described in clause (A) of this sentence.  The Gross-Up
Payment will be in an amount such that, after payment by the Executive of all
taxes (including any interest or penalties imposed with respect to such taxes),
including any Excise Tax imposed upon the Gross-Up Payment, the Executive will
have received an amount of the Gross-Up Payment equal to the Excise Tax imposed
upon the Payment.

         (b)     Subject to the provisions of Section 4(f), all determinations
required to be made under this Section 4, including whether an Excise Tax is
payable by the Executive and the amount of such Excise Tax and whether a
Gross-Up Payment is required to be paid by the Trust to the Executive and the
amount of such Gross-Up Payment, if any, will be made by a nationally
recognized accounting firm (the "Accounting Firm") selected by the Executive in
the Executive's sole discretion.  The Executive will direct the Accounting Firm
to submit its determination and detailed supporting calculations to both the
Trust and the Executive within 30 calendar days after the Executive's
termination date, and any such other time or times as may be requested by the
Trust or the Executive.  If the Accounting Firm determines that any Excise Tax
is payable by the Executive, the Trust will pay the required Gross-Up Payment
to the Executive within five business days after receipt of such determination
and calculations with respect to any Payment to the Executive.  If the
Accounting Firm determines that no Excise Tax is payable by the Executive, it
will, at the same time as it makes such determination, furnish the Trust and
the Executive an opinion that the Executive has substantial authority not to
report any Excise Tax on the Executive's federal, state or local income or
other tax return.  As a result of the uncertainty in the application of Section
4999 of the Code (or any successor provision thereto) and the possibility of
similar uncertainty regarding applicable state or local tax law at the time of
any determination by the Accounting Firm hereunder, it is possible that
Gross-Up Payments which will not have been made by the Trust should have been
made (an "Underpayment"), consistent with the calculations required to be made
hereunder.  In the event that the Trust exhausts or fails to pursue its
remedies pursuant to Section 4(f) and the Executive thereafter is required to
make a payment of any Excise Tax, the Executive will direct the Accounting Firm
to determine the amount of the Underpayment that has occurred and to submit its
determination and detailed supporting calculations to both the Trust and the
Executive as promptly as possible.  Any such Underpayment will be promptly paid
by the Trust to, or for the benefit of, the Executive within five business days
after receipt of such determination and calculations.

         (c)     The Trust and the Executive will each provide the Accounting
Firm access to and copies of any books, records and documents in the possession
of the Trust or the Executive, as the case may be, reasonably requested by the
Accounting Firm, and otherwise cooperate with the Accounting Firm in connection
with the preparation and issuance of the determinations and calculations
contemplated by Section 4(b).  Any determination by the Accounting Firm as to
the amount of the Gross-Up Payment will be binding upon the Trust and the
Executive.

         (d)     The federal, state and local income or other tax returns filed
by the Executive will be prepared and filed on a consistent basis with the
determination of the Accounting Firm with respect to the Excise Tax payable by
the Executive.  The Executive will make proper payment of





                                       3
<PAGE>   4
the amount of any Excise Payment and, at the request of the Trust, provide to
the Trust true and correct copies (with any amendments) of the Executive's
federal income tax return as filed with the Internal Revenue Service and
corresponding state and local tax returns, if relevant, as filed with the
applicable taxing authority, and such other documents reasonably requested by
the Trust, evidencing such payment.  If prior to the filing of the Executive's
federal income tax return, or corresponding state or local tax return, if
relevant, the Accounting Firm determines that the amount of the Gross-Up
Payment should be reduced, the Executive will within five business days pay to
the Trust the amount of such reduction.

         (e)     The fees and expenses of the Accounting Firm for its services
in connection with the determinations and calculations contemplated by Section
4(b) will be borne by the Trust.  If such fees and expenses are initially paid
by the Executive, the Trust will reimburse the Executive the full amount of
such fees and expenses within five business days after receipt from the
Executive of a statement therefor and reasonable evidence of the Executive's
payment thereof.

         (f)     The Executive will notify the Trust in writing of any claim by
the Internal Revenue Service or any other taxing authority that, if successful,
would require the payment by the Trust of a Gross-Up Payment.  Such
notification will be given as promptly as practicable but no later than 10
business days after the Executive actually receives notice of such claim and
the Executive will further apprise the Trust of the nature of such claim and
the date on which such claim is requested to be paid (in each case, to the
extent known by the Executive).  The Executive will not pay such claim prior to
the earlier of (i) the expiration of the 30-calendar day period following the
date on which the Executive gives such notice to the Trust and (ii) the date
that any payment of amount with respect to such claim is due.  If the Trust
notifies the Executive in writing prior to the expiration of such period that
it desires to contest such claim, the Executive will:

                 (A)      provide the Trust with any written records or
documents in the Executive's possession relating to such claim reasonably
requested by the Trust;

                 (B)      take such action in connection with contesting such
claim as the Trust may reasonably request in writing from time to time,
including without limitation accepting legal representation with respect to
such claim by an attorney competent in respect of the subject matter and
reasonably selected by the Trust;

                 (C)      cooperate with the Trust in good faith in order
effectively to contest such claim; and

                 (D)      permit the Trust to participate in any proceedings
relating to such claims;

provided, however, that the Trust will bear and pay directly all costs and
expenses (including interest and penalties) incurred in connection with such
contest and will indemnify and hold harmless the Executive, on an after-tax
basis, for and against any Excise Tax or income tax, including interest and
penalties with respect thereto, imposed as a result of such representation and





                                       4
<PAGE>   5
payment of costs and expenses.  Without limiting the foregoing provisions of
this Section 4(f), the Trust will control all proceedings taken in connection
with the contest of any claim contemplated by this Section 4(f) and, at its
sole option, may pursue or forego any and all administrative appeals,
proceedings, hearings and conferences with the taxing authority in respect of
such claim (provided, however, that the Executive may participate therein at
the Executive's own cost and expense) and may, at its option, either direct the
Executive to pay the tax claimed and sue for a refund or contest the claim in
any permissible manner, and the Executive will 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 Trust may determine;
provided, however, that if the Trust directs the Executive to pay the tax
claimed and sue for a refund, the Trust will advance the amount of such payment
to the Executive on an interest-free basis and will indemnify and hold the
Executive harmless, on an after-tax basis, from any Excise Tax or income or
other tax, including interest or penalties with respect thereto, imposed with
respect to such advance; and provided further, however, that any extension of
the statute of limitations relating to payment of taxes for the taxable year of
the Executive with respect to which the contested amount is claimed to be due
is limited solely to such contested amount.  The Trust's control of any such
contested claim will be limited to issues with respect to which a Gross-Up
Payment would be payable hereunder and the Executive will be entitled to settle
or contest, as the case may be, any other issue raised by the Internal Revenue
Service or any other taxing authority.

         (g)     If, after the receipt by the Executive of an amount advanced
by the Trust pursuant to Section 4(f), the Executive receives any refund with
respect to such claim, the Executive will (subject to the Trust's complying
with the requirements of Section 4(f)) pay to the Trust the amount of such
refund (together with any interest paid or credited thereon after any taxes
applicable thereto) within 30 calendar days after such receipt and the Trust's
satisfaction of all accrued obligations under this Agreement.  If, after the
receipt by the Executive of any amount advanced by the Trust pursuant to
Section 4(f), a determination is made that the Executive will not be entitled
to any refund with respect to such claim and the Trust does not notify the
Executive in writing of its intent to contest such determination prior to the
expiration of 30 calendar days after such determination, then such advance will
be forgiven and will not be required to be repaid and the amount of any such
advance will offset, to the extent thereof, the amount of Gross-Up Payment
required to be paid by the Trust to the Executive pursuant to this Section 4.

         5.      LEGAL FEES AND EXPENSES; SECURITY.  It is the intent of the
Trust that the Executive not be required to incur legal fees and the related
expenses associated with the interpretation, enforcement or defense of the
Executive's rights to compensation upon a Change in Control by litigation or
otherwise because the cost and expense thereof would substantially detract from
the benefits intended to be extended to the Executive hereunder.  Accordingly,
if it should appear to the Executive that the Trust has failed to comply with
any of its obligations under this Agreement or in the event that the Trust or
any other person takes or threatens to take any action to declare the agreement
to pay Executive compensation upon a Change in Control void or unenforceable,
or institutes any litigation or other action or proceeding designed to deny, or
to recover from, the Executive the benefits provided or intended to be provided
to the Executive hereunder, the Trust





                                       5
<PAGE>   6
irrevocably authorizes the Executive from time to time to retain counsel of the
Executive's choice, at the expense of the Trust as hereinafter provided, to
advise and represent the Executive in connection with any such interpretation,
enforcement or defense, including without limitation the initiation or defense
of any litigation or other legal action, whether by or against the Trust or any
Trust Manager, officer, shareholder, or other person affiliated with the Trust,
in any jurisdiction.  Notwithstanding any existing or prior attorney-client
relationship between the Trust and such counsel, the Trust irrevocably consents
to the Executive's entering into an attorney-client relationship with such
counsel, and in that connection the Trust and the Executive agree that a
confidential relationship will exist between the Executive and such counsel.
Without regard to whether the Executive prevails, in whole or in part, in
connection with any of the foregoing, the Trust will pay and be solely
financially responsible for any and all attorneys' and related fees and
expenses incurred by the Executive in connection with any of the foregoing.

         6.      EMPLOYMENT RIGHTS; TERMINATION PRIOR TO CHANGE IN CONTROL.
Nothing expressed or implied in this Agreement will create any right or duty on
the part of the Trust or the Executive to have the Executive remain in the
employ of the Trust prior to or following any Change in Control.  Any
termination of the employment of the Executive or the removal of the Executive
from any office or position in the Trust following the commencement of any
discussion with a third person that results in a Change in Control within 180
calendar days after such termination or removal will be deemed to be a
termination or removal of the Executive after a Change in Control for purposes
of this Agreement, entitling Executive to receive all benefits he would have
received under this Agreement had he been an employee of the Trust on the date
of the Change in Control.

         7.      CERTAIN DEFINED TERMS.  In addition to terms defined elsewhere
herein, the following terms have the following meanings when used herein with
initial capital letters:

         (a)     "Change in Control" means the occurrence during the term of
this Agreement of any of the following events:

                 (i)      the Trust is merged, consolidated, or reorganized
         into or with another corporation or other legal entity and the Trust
         is not the "surviving entity;"

                 (ii)     the Trust sells or otherwise transfers 50% or more of
         its assets to another corporation or other legal entity or in a series
         of related transactions;

                 (iii)  there is a report filed on Schedule 13D or Schedule
         14D-1 (or any successor schedule, form or report or item therein),
         each as promulgated pursuant to the Securities Exchange Act of 1934,
         as amended (the "Exchange Act"), disclosing that any person (as the
         term "person" is used in Section 13(d)(3) or Section 14(d)(2) of the
         Exchange Act) has become the beneficial owner (as the term "beneficial
         owner" is defined under Rule 13d-3 or any successor rule or regulation
         promulgated under the Exchange Act) of securities representing over
         33% of the combined voting power of the securities of the Trust
         entitled





                                       6
<PAGE>   7
         to vote generally in the election of Trust Managers (the "Voting
         Shares") of the Trust or could become the owner of over 33% of the
         Trust's Common Shares of Beneficial Interest through the conversion of
         the Trust's debt or equity securities;

                 (iv)     the Trust files a report or proxy statement with the
         Securities and Exchange Commission pursuant to the Exchange Act
         disclosing in response to Form 8-K or Schedule 14A (or any successor
         schedule, form or report or item therein) that a change in control of
         the Trust has occurred or will occur in the future pursuant to any
         then-existing contract or transaction; provided, however, a Change in
         Control shall be deemed to occur only when the transaction described
         in the Form 8-K or Schedule 14A (or any successor schedule, form or
         report or item therein) is consummated; or

                 (v)      if, during any period of 12 months, individuals who
         at the beginning of any such period constitute the Trust Managers of
         the Trust cease for any reason (other than death or disability) to
         constitute at least a majority thereof;

Notwithstanding the foregoing provisions of Section 7(a), a "Change in Control"
will not be deemed to have occurred for purposes of Section 7(a) solely because
(A) an entity in which the Trust, directly or indirectly, beneficially owns 50%
or more of the voting securities (a "Subsidiary"), or (B) any employee share
ownership plan or any other employee benefit plan of the Trust or any
Subsidiary either files or becomes obligated to file a report or a proxy
statement under or in response to Schedule 13D, Schedule 14D-1, Form 8-K, or
Schedule 14A (or any successor schedule, form, or report or item therein) under
the Exchange Act disclosing beneficial ownership by it of shares of Voting
Shares, whether in excess of 33% or otherwise, or because the Trust reports
that a change in control of the Trust has occurred or will occur in the future
by reason of such beneficial ownership.

The determination as to which party to a merger, consolidation or
reorganization is the "surviving entity" within the meaning of Section 7(a)
shall be made on the basis of the relative equity interests of the shareholders
in the entity existing after the merger, consolidation or reorganization, as
follows: if following any merger, consolidation or reorganization the holders
of outstanding Voting Shares of the Trust immediately prior to the merger,
consolidation or reorganization own equity securities possessing more than 50%
of the voting power of the entity existing following the merger, consolidation
or reorganization, the Trust shall be the surviving entity.  In all other
cases, the Trust shall not be the surviving entity.  In making the
determination of ownership of equity securities by the shareholders of an
entity immediately after the merger, consolidation or reorganization pursuant
to this paragraph, equity securities which the shareholders owned immediately
before the merger, consolidation or reorganization as shareholders of another
party to the transaction shall be disregarded.  Further, for purposes of this
paragraph only, outstanding voting securities of an entity shall be calculated
by assuming the conversion of all equity securities convertible (immediately or
at some future time) into shares entitled to vote.





                                       7
<PAGE>   8
         (b)     "Employee Benefits" means the perquisites, benefits and
service credit for benefits as provided under any and all employee retirement
income and welfare benefit policies, plans, programs or arrangements in which
the Executive is entitled to participate, including without limitation any
share option, share purchase, share appreciation, dividend equivalent rights,
savings, pension, supplemental executive retirement or other retirement income
or welfare benefit, deferred compensation, incentive compensation, group or
other life, health, medical/hospital, or other insurance (whether funded by
actual insurance or self-insured by the Trust), disability, salary
continuation, expense reimbursement, and other employee benefit policies,
plans, programs or arrangements that may now exist or any equivalent successor
policies, plans, programs or arrangements that may be adopted hereafter by the
Trust, providing perquisites, benefits and service credit for benefits at least
as great in the aggregate as are payable thereunder prior to a Change in
Control.

         (c)     The term "Severance Benefit" shall mean an amount equal to
2.50 times (i) the Executive's annualized base salary rate as of the date of
the first event constituting a Change in Control or, if higher, (ii) the
Executive's highest base salary received for any year in the previous five
fiscal years immediately preceding the first event constituting a Change in
Control, plus 2.50 times Executive's targeted bonus amount for the fiscal year
in which the first event constituting a Change in Control occurs.  If Executive
has been employed by the Trust for less than five years, this Section 7(c)
shall be deemed to mean such actual period of employment.

         (d)     "Severance Period" means the period of time commencing on the
date of an occurrence of each Change in Control and continuing until the
earliest of (i) the expiration of one year after each occurrence of an event
constituting a Change in Control, (ii) the Executive's death, or (iii) the
Executive's attainment of age 65.

         8.      TERM.  The term of this Agreement shall be deemed to commence
and be effective as of the date of this Agreement and shall continue for a
five-year term and shall automatically renew for one-year terms unless either
party gives notice of its intent not to renew at least 180 days prior to the
end of any term or, unless earlier terminated in accordance with the provisions
hereof.

         9.      TERMINATION.  Except with respect to the provisions of this
Agreement that provide for payments to be made to Executive after termination
of employment, this Agreement shall terminate automatically without further
action by either of the parties hereto upon the death or permanent disability
of Executive or the termination of Executive's employment with the Trust for
any reason or no reason, in accordance with Executive's status as an employee
at will.  As used herein, the term "permanent disability" means physical or
mental disability or both that is determined by the Trust, in its reasonable
discretion, to substantially impair the ability of Executive to perform the
day-to-day functions normally performed by Executive if the disability is
suffered (or is reasonably expected to be suffered) by Executive for a period
of not less than six consecutive calendar months.  Notwithstanding the
foregoing and except as set forth in Section 6, Executive (or his estate, heirs
or personal representatives, as applicable) shall not be entitled to





                                       8
<PAGE>   9
severance compensation except to the extent that a Change in Control of the
Trust occurs 180 days or less prior to the termination of this Agreement.

         10.     REPRESENTATION BY EXECUTIVE.   Executive hereby represents and
warrants to the Trust that there are no agreements or understandings that would
make unlawful his execution or delivery of this Agreement.

         11.     NOTICES.  All notices, renewals and other communications
required or permitted under this Agreement must be in writing and shall be
deemed to have been given if delivered or mailed, by certified mail, first
class postage prepaid, to the parties at the addresses set forth in this
Agreement, as the same may be changed in writing by the parties from time to
time.

         12.     ENTIRE AGREEMENT.  The parties expressly agree that this
Agreement is contractual in nature and not a mere recital, and that it contains
all the terms and conditions of the agreement between the parties with respect
to the matters set forth herein.  All prior negotiations, agreements,
arrangements, understandings and statements between the parties relating to the
matters set forth herein that have occurred at any time or contemporaneously
with the execution of this Agreement (including, but not limited to, the Prior
Agreement) are superseded and merged into this completely integrated Agreement.
The Recitals set forth above shall be deemed to be part of this Agreement.

         13.     GOVERNING LAW.  This Agreement was negotiated and is
performable in Dallas County, Texas and shall be governed by the laws of the
State of Texas without giving effect to principles of conflicts of law.

         14.     SEVERABILITY.  If any provision of this Agreement is held to
be illegal, invalid or unenforceable under any present or future law, such
provisions shall be fully severable, and this Agreement shall be construed and
enforced as if such illegal, invalid or unenforceable provision had never
comprised a part hereof, the remaining provisions of this Agreement shall
remain in full force and effect and shall not be affected by the illegal,
invalid or unenforceable provision or by its severance herefrom, and in lieu of
such provision, there shall be added automatically as a part of this Agreement,
a legal, valid and enforceable provision as similar in terms to such illegal,
invalid or unenforceable provision as may be possible, and the Trust and
Executive hereby request the court or any arbitrator to whom disputes relating
to this Agreement are submitted to reform the otherwise unenforceable covenant
in accordance with the proceeding provision.

         15.     COUNTERPARTS.  This Agreement may be executed in multiple
identical counterparts, each of which shall be deemed an original, and all of
which taken together shall constitute but one and the same instrument.  In
making proof of this Agreement, it shall not be necessary to produce or account
for more than one counterpart executed by the party sought to be charged with
performance hereunder.





                                       9
<PAGE>   10
         16.     ASSIGNMENT AND DELEGATION.  All rights, covenants and
agreements of the Trust set forth in this Agreement shall, unless otherwise
provided herein, be binding upon and inure to the benefit of the Trust's
respective successors and assigns.  All rights, covenants and agreements of
Executive set forth in this Agreement shall, unless otherwise provided herein,
not be assignable by Executive, and shall be considered personal to Executive
for all purposes.

         17.     DEATH.  If Executive dies before receiving payment under this
Agreement, a lump-sum payment shall be made to Executive's estate or designated
beneficiary.

         18.     WAIVER OF BREACH.  Failure by either party to demand strict
compliance with any of the terms, covenants or provisions hereof shall not be
deemed a waiver of the term, covenant or provision, nor any waiver or
relinquishment by the Trust of any power at any other time or times.

         19.     WITHHOLDING OF TAXES.  The Trust shall withhold taxes from
amounts paid pursuant to this Agreement as required by law, and, to the extent
deemed necessary by the Trust, in good faith.

         20.     VESTING OF BENEFITS.  Notwithstanding anything in this
Agreement, the Trust's Employee and Trust Manager Incentive Share Plan (the
"Plan"), any agreement entered into under the Plan, or under any retirement,
pension, profit sharing or other similar plan, upon the occurrence of a Change
in Control, all deferred or unvested portions of any award made to Executive
under any of the foregoing plans and agreements shall automatically become
fully vested in Executive and shall be in effect and redeemable by or payable
to Executive, or Executive's designated beneficiary or estate, on the same
conditions (other than vesting) as would have applied had the Change in Control
not occurred.  All unvested awards under the Plan shall immediately vest upon
the Change in Control and the Executive shall have the right to exercise any
vested awards during the balance of the awards' term.

         IN WITNESS WHEREOF, the undersigned have executed and delivered this
Agreement as of the date first set forth above.


                            AMERICAN INDUSTRIAL PROPERTIES REIT


                            By:  /s/ Charles W. Wolcott                       
                                ----------------------------------------------
                            Title: President and CEO                          
                                  --------------------------------------------

                            Notice Address:  6210 North Beltline
                                             Suite 170
                                             Irving, Texas 75063-2656





                                     10
<PAGE>   11
                            EXECUTIVE:
                            
                            
                            
                            /s/ Lewis D. Friedland                            
                            --------------------------------------------------
                            Lewis D. Friedland
                            
                            Notice Address:                                   
                                             ---------------------------------
                                                                              
                                             ---------------------------------
                                                                              
                                             ---------------------------------





                                     11

<PAGE>   1
                                                                    EXHIBIT 10.5


         RESOLVED, that the fourth sentence of Section 6.1(b) of the Trust's
Employee and Trust Manager Incentive Share Plan (the "Plan") be, and it hereby
is, amended to read in its entirety as follows:

                  "Notwithstanding the foregoing, if such a transaction occurs,
                  in lieu of causing such rights to be substituted for
                  outstanding Awards, the Company may, with the written consent
                  of the Participant (which consent may be withheld in
                  Participant's sole discretion), upon 20 days' prior written
                  notice to Participant: (i) shorten the period during which
                  Awards are exercisable, provided they remain exercisable, to
                  the extent otherwise exercisable, for at least 20 days after
                  the date the notice is given, or (ii) with the written consent
                  of the Participant (which consent may be withheld in
                  Participant's sole discretion), cancel an Award upon payment
                  to the Participant in cash, with respect to each Award to the
                  extent then exercisable, of an amount which, in the sole
                  discretion of the Committee, is determined to be the
                  equivalent, if any, by which the fair market value (at the
                  effective time of the transaction) of the consideration that
                  the Participant would have received if the Award had been
                  exercised before the effective time exceeds the exercise price
                  of the Award."

         RESOLVED, that the first sentence of Section 6(i) of the Plan be, and
it hereby is, revised to read in its entirety as follows:

                  "Except as may be provided in any Award Agreement or
                  employment or severance agreement between the Trust and an
                  employee, any Award or portion thereof which has not vested on
                  or before the date of a Participant's Employment Termination
                  shall expire on the date of Termination."

         RESOLVED, that Section 7.4 of the Plan be, and it hereby is, revised to
read in its entirety as follows:

                  "7.4 Forfeiture of Restricted Shares. Except to the extent or
                  otherwise provided in the governing Award Agreement or any
                  employment or severance agreement between the Trust and an
                  employee, when a Participant's Employment Termination occurs,
                  the Participant shall forfeit all Restricted Shares still
                  subject to restriction."




<PAGE>   2



         RESOLVED, that Section 9.4 of the Plan be, and it hereby is, revised to
read in its entirety as follows:

                  "9.4 Termination of Employment. In the event of Employment
                  Termination, except as otherwise provided by the Committee, by
                  any Award Agreement or by any employment or severance
                  agreement between the Trust and an employee, any Dividend
                  Equivalent Right held by such Participant on the date of
                  Employment Termination shall be forfeited."

         RESOLVED, that to the extent the terms and provisions of the Agreements
are inconsistent with the Plan or any agreements entered into under the Plan,
the Plan and any such agreements shall be deemed to be retroactively amended (to
the date of any such agreement or the date of the Plan, as applicable) to
conform to such Agreement without any further action.

         RESOLVED, that a new Section 20 shall be added to the Plan which
provides as follows:

                  "20.  Inconsistencies.  To the extent any provision of this 
                  Plan conflicts with any employment or severance agreement 
                  between an employee and the Trust, the provisions of the 
                  employment or severance agreement shall control."






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