Document:

Tax Protection Agreement

 Exhibit 10.3 
 TAX PROTECTION AGREEMENT 
 This TAX PROTECTION AGREEMENT (this
“Agreement”) is entered into as of January 19, 2011, by and among American Assets Trust, Inc., a Maryland corporation (the “REIT”), American Assets Trust, L.P., a Maryland limited partnership (the “Operating
Partnership”), each Protected Partner identified as a signatory on Schedule I, as amended from time to time, each Guaranty Partner identified as a signatory on Schedule II, as amended from time to time, and each Non-Qualified
Liability Partner identified as a signatory on Schedule III, as amended from time to time. 
 RECITALS 

WHEREAS, the REIT desires to consolidate the ownership of a portfolio of properties currently owned, directly or indirectly, by certain
entities, as set forth in the Formation Transaction Documentation. 
 WHEREAS, the Formation Transactions relate to the proposed
initial public offering of the common stock of the REIT, par value $.01 per share, following which the REIT will operate as a self-administered and self-managed real estate investment trust within the meaning of Section 856 of the Code (as
defined below); and 
 WHEREAS, as a condition to engaging in the Formation Transactions, and as an inducement to do so, the
parties hereto are entering into this Agreement; 
 NOW, THEREFORE, in consideration of the promises and mutual agreements
contained herein and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: 
 ARTICLE I 
 DEFINED TERMS 

For purposes of this Agreement the following terms shall apply: 
 Section 1.1 “50% Termination” has the meaning set forth in Section 1.40. 
 Section 1.2 “Affiliate” means, with respect to any Person, any Person directly or indirectly controlling or controlled by or under common control with such Person. For the purposes of
this definition, “control” when used with respect to any Person means the possession, directly or indirectly, of the power to direct or cause the direction of the management and policies of such Person, whether through the ownership of
voting securities, by contract or otherwise, and the terms “controlling” and “controlled” have meanings correlative to the foregoing. 
 Section 1.3 “Agreement” has the meaning set forth in the preamble. 

 Section 1.4 “Approved Liability” means either: 

(a) A liability of the Operating Partnership (or of an entity whose separate existence from the Operating Partnership is disregarded for
Federal income tax purposes) with respect to which all of the following requirements are satisfied: 
 (i) the liability is
secured by real property or other assets (the “Collateral”) owned directly or indirectly by the Operating Partnership (or by an entity whose separate existence from the Operating Partnership is disregarded for Federal income tax purposes);

 (ii) on the date on which the Operating Partnership designated such liability as a Approved Liability, the fair market value
(as reasonably determined in good faith by the Operating Partnership) of the Collateral was at least 140% times the outstanding principal amount (and any accrued and unpaid interest) of the liability and any other Approved Liabilities secured by
such Collateral at such time, provided that if interest on such liability is not required to be paid at least annually or if the documents evidencing such liability permit the borrower to borrow additional amounts that are secured by the
Collateral, the outstanding principal amount of such liability shall include the maximum amount that could be so added to the principal amount of such liability without a default, provided, however, if notwithstanding the Operating
Partnership’s commercially reasonable efforts, it is unable to make available the Guarantee Opportunities required by this Agreement, 130% shall be substituted for 140% as set forth above; 

(iii) the liability constitutes “qualified nonrecourse financing” as defined in Section 465(b)(6) of the Code with
respect to the Protected Partners; 
 (iv) other than guaranties by the Guaranty Partners, no other person has executed any
guaranties with respect to such liability; and 
 (v) the Collateral does not provide security for another liability (other
than another Approved Liability) that ranks senior to, or pari passu with, the liability described in clause (i) above. 
 For
purposes of determining whether clause (ii) has been satisfied in situations where one or more potential Approved Liabilities are secured by more than one item of Collateral, the Operating Partnership shall allocate such liabilities among such
items of Collateral in proportion to their relative fair market values (as reasonably determined in good faith by the Operating Partnership); 
 (b) A liability of the Operating Partnership that 
 (i) is not secured by any of
the assets of the Operating Partnership and is a general, recourse obligation of the Operating Partnership, and 
 (ii) is not
provided by a lender that has an interest in the Operating Partnership or is related to the Operating Partnership within the meaning of Section 465(b)(3)(C) or the Code; 

  
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 (c) Solely with respect to the Non-Qualified Liability Amount for each Non-Qualified
Liability Partner, the applicable Non-Qualified Liabilities; or 
 (d) Any other indebtedness approved by the Partners’
Representative (or his successor or designee) in his sole and absolute discretion. 
 Section 1.5 “Closing
Date” has the meaning assigned to it in the applicable Pre-Formation Transaction Documentation. 
 Section 1.6
“Code” means the Internal Revenue Code of 1986, as amended. 
 Section 1.7 “Collateral” has
the meaning set forth in the definition of “Approved Liability.” 
 Section 1.8 “Debt Gross Up
Amount” has the meaning set forth in definition of “Make Whole Amount.” 
 Section 1.9 “Debt
Notification Event” means, with respect to an Approved Liability, any transaction in which such liability shall be refinanced, otherwise repaid (excluding for this purpose, scheduled payments of principal occurring prior to the maturity
date of such liability), or guarantied by any of the REIT, the Operating Partnership, or one or more of their Affiliates, or guarantied by one or more partners of the Operating Partnership. 

Section 1.10 “Exchange” has the meaning set forth in Section 2.1(b). 

Section 1.11 “Formation Transaction Documentation” means all of the agreements and plans of merger and contribution
agreements, substantially in the forms accompanying the Request for Consent and Private Placement Memorandum dated July 31, 2010, pursuant to which all or a portion of the equity interests in certain specified entities are to be acquired by the REIT
or the Operating Partnership, directly or indirectly, as part of the Formation Transactions. 
 Section 1.12 “Formation
Transactions” means the transactions contemplated by this Agreement and the other Formation Transaction Documentation. 

Section 1.13 “Fundamental Transaction” means a merger, consolidation or other combination of the Operating Partnership
with or into any other entity, a transfer of all or substantially all of the assets of the Operating Partnership, any reclassification, recapitalization or change of the outstanding equity interests of the Operating Partnership, or a conversion of
the Operating Partnership into another form of entity. 
 Section 1.14 “Gross Up Amount” has the meaning set
forth in definition of “Make Whole Amount.” 
 Section 1.15 “Guarantied Liability” means any
Approved Liability or Non-Qualified Liability that is guarantied, in whole or in part, by one or more Guaranty Partners or Non-Qualified Liability Partner, as applicable, in accordance with this Agreement. 

  
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 Section 1.16 “Guaranty Partner” means: (i) each signatory on
Schedule II attached hereto, as amended from time to time; (ii) any person who holds OP Units and who acquired such OP Units from another Guaranty Partner in a transaction in which such person’s adjusted basis in such OP Units, as
determined for Federal income tax purposes, is determined, in whole or in part, by reference to the adjusted basis of the other Guaranty Partner in such OP Units; and (iii) with respect to a Guaranty Partner that is Pass Through Entity, and
solely for purposes of computing the amount to be paid under Section 2.4 with respect to such Guaranty Partner, any person who (y) holds an interest in such Guaranty Partner, either directly or through one or more Pass Through Entities,
and (z) is required to include all or a portion of the income of such Guaranty Partner in its own gross income. 
 Section
1.17 “Guaranty Permissible Liability” means a liability with respect to which the lender permits a guaranty. 

Section 1.18 “Guaranty Opportunity” has the meaning set forth in Section 2.4(b). 

Section 1.19 “Make Whole Amount” means: (a) with respect to any Protected Partner that recognizes gain under
Section 704(c) of the Code as a result of a Tax Protection Period Transfer, the sum of (i) the product of (x) the income and gain recognized by such Protected Partner under Section 704(c) of the Code in respect of
such Tax Protection Period Transfer (taking into account any adjustments under Section 743 of the Code to which such Protected Partner is entitled) multiplied by (y) the Make Whole Tax Rate, plus (ii) an amount equal to
the combined Federal, applicable state and local income taxes (calculated using the Make Whole Tax Rate) imposed on a Protected Partner as a result of the receipt by a Protected Partner of a payment under Section 2.2 (the “Gross Up
Amount”); provided, however, that the Gross Up Amount shall be computed without regard to any losses, credit, or other tax attributes that a Protected Partner might have that would reduce its actual tax liability; and
(b) with respect to any Guaranty Partner or Non-Qualified Liability Partner that recognizes gain as a result of a breach by the Operating Partnership of the provisions of Section 2.4 or Section 2.5 hereof, the sum of
(i) the product of (x) the income and gain recognized by such Guaranty Partner or Non-Qualified Liability Partner by reason of such breach, multiplied by (y) the Make Whole Tax Rate, plus (ii) an amount
equal to the combined Federal, applicable state and local income taxes (calculated using the Make Whole Tax Rate) imposed on a Guaranty Partner or Non-Qualified Liability Partner as a result of the receipt by a Guaranty Partner or Non-Qualified
Liability Partner of a payment under Section 2.4 or Section 2.5 (the “Debt Gross Up Amount”); provided, however, that the Debt Gross Up Amount shall be computed without regard to any losses, credit, or
other tax attributes that a Guaranty Partner or Non-Qualified Liability Partner might have that would reduce its actual tax liability. For purposes of calculating the amount of Section 704(c) gain that is allocated to a Protected Partner,
(i) subject to clause (ii) below, any “reverse Section 704(c) gain” allocated to such partner pursuant to Treasury Regulations § 1.704-3(a)(6) shall not be taken into account, and (ii) if, as a result of
adjustments to the Gross Asset Value (as defined in the OP Agreement) of the Protected Properties pursuant to clause (b) of the definition of Gross Asset Value as set forth in the OP Agreement, all or a portion of the gain recognized by the
Operating Partnership that would have been Section 704(c) gain without regard to such adjustments becomes or is treated as “reverse Section 704(c) gain” or Section 704(b) gain under Section 704 of the Code, then such
gain shall continue to be treated as Section 704(c) gain; 

  
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provided that the total amount of 704(c) gain and income taken into account for purpose of calculating the Make Whole Amount shall not exceed the initial Section 704(c) gain amount as
of the Closing Date (whether or not equal to the estimated amount set forth on Exhibit B). 
 Section 1.20 “Make
Whole Tax Rate” means, with respect to a Protected Partner who is entitled to receive a payment under Section 2.2 and with respect to a Guaranty Partner or Non-Qualified Liability Partner who is entitled to receive payment under
Section 2.4 or Section 2.5, the highest combined statutory Federal, state and local tax rate in respect of the income or gain that gave rise to such payment, taking into account the character of the income and gain in the hands of such
Protected Partner, Guaranty Partner or Non-Qualified Liability Partner, as applicable (reduced, in the case of Federal taxes, by the deduction allowed for income taxes paid to a state or locality), for the taxable year in which the event that gave
rise to such payment under Section 2.2, Section 2.4 or Section 2.5 occurred. Notwithstanding the foregoing, if a Protected Partner, Guaranty Partner or Non-Qualified Liability Partner demonstrates to the reasonable satisfaction
of the Operating Partnership that such Protected Partner, Guaranty Partner or Non-Qualified Liability Partner, as applicable, is not entitled to a Federal income tax deduction for all or a portion of the income taxes paid to a state or locality, the
Make Whole Tax Rate applicable to such Protected Partner, Guaranty Partner or Non-Qualified Liability Partner shall be reduced only by the deduction, if any, the Protected Partner, Guaranty Partner or Non-Qualified Liability Partner is entitled to
take for such taxes. 
 Section 1.21 “Non-Qualified Liability” means each of the liabilities set forth on
Exhibit D. 
 Section 1.22 “Non-Qualified Liability Amount” means the amount shown in the column labeled
“Non-Qualified Liability Amount” for each Non-Qualified Liability listed below each Non-Qualified Liability Partner’s name in Exhibit E. 
 Section 1.23 “Non-Qualified Liability Period” means the period commencing on the Closing Date and ending on the second anniversary of the Closing Date. 

Section 1.24 “Non-Qualified Liability Partner” means: (i) each signatory on Schedule III attached hereto, as
amended from time to time; and (ii) any person who holds OP Units and who acquired such OP Units from another Non-Qualified Liability Partner in a transaction in which such person’s adjusted basis in such OP Units, as determined for
Federal income tax purposes, is determined, in whole or in part, by reference to the adjusted basis of the other Guaranty Partner in such OP Units. 
 Section 1.25 “OP Agreement” means the Agreement of Limited Partnership of American Assets Trust, L.P., as amended from time to time. 

Section 1.26 “OP Units” means common units of partnership interest in the Operating Partnership. 

Section 1.27 “Operating Partnership” has the meaning set forth in the preamble. 

Section 1.28 “Partners’ Representative” means Ernest Rady and his executors, administrators or permitted assigns.

  
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 Section 1.29 “Pass Through Entity” means a partnership, grantor trust, or S
corporation for Federal income tax purposes. 
 Section 1.30 “Permitted Disposition” means a sale, exchange or
other disposition of OP Units (i) by a Protected Partner or Guaranty Partner: (a) to such Protected Partner’s or Guaranty Partner’s children, spouse or issue; (b) to a trust for such Protected Partner or Guaranty Partner or
such Protected Partner’s or Guaranty Partner’s children, spouse or issue; (c) in the case of a trust which is a Protected Partner or Guaranty Partner, to its beneficiaries, or any of them, whether current or remainder beneficiaries;
(d) to a revocable inter vivos trust of which such Protected Partner or Guaranty Partner is a trustee; (e) in the case of any partnership or limited liability company which is a Protected Partner or Guaranty Partner, to its partners
or members; and/or (f) in the case of any corporation which is a Protected Partner or Guaranty Partner, to its shareholders, and (ii) by a party described in clauses (a), (b), (c) or (d) to a partnership, limited liability
company or corporation of which the only partners, members or shareholders, as applicable, are parties described in clauses (a), (b), (c) or (d); provided, that for purposes of the definition of Tax Protection Period, such Protected
Partner or Guaranty Partner shall be treated as continuing to own any OP Units which were subject to a Permitted Disposition unless and until there has been a sale, exchange or other disposition of such OP Units by a permitted transferee which is
not another Permitted Disposition. 
 Section 1.31 “Person” means an individual or a corporation, partnership,
trust, unincorporated organization, association, limited liability company or other entity. 
 Section 1.32 “Protected
Partner” means: (i) each signatory on Schedule I attached hereto, as amended from time to time; (ii) any person who holds OP Units and who acquired such OP Units from another Protected Partner in a transaction in which such
person’s adjusted basis in such OP Units, as determined for Federal income tax purposes, is determined, in whole or in part, by reference to the adjusted basis of the other Protected Partner in such OP Units; and (iii) with respect to a
Protected Partner that is Pass Through Entity, and solely for purposes of computing the amount to be paid under Section 2.2 with respect to such Protected Partner, any person who (y) holds an interest in such Protected Partner, either
directly or through one or more Pass Through Entities, and (z) is required to include all or a portion of the income of such Protected Partner in its own gross income. 
 Section 1.33 “Protected Property” means each property identified on Exhibit A hereto and each property acquired in Exchange for a Protected Property as set forth in Section
2.1(b). 
 Section 1.34 “Representation, Warranty and Indemnity Agreement” means that certain
Representation, Warranty and Indemnity Agreement, made and entered into as of September 13, 2010, by and amount the REIT, the Operating Partnership and Ernest Rady Trust U/D/T March 10, 1983, as amended. 

Section 1.35 “Required Liability Amount” means, with respect to each Guaranty Partner, 110% of such Guaranty
Partner’s estimated “negative tax capital account” as of the Closing Date, a current estimate of which is set forth on Exhibit C hereto for each such Guaranty Partner. 

  
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 Section 1.36 “REIT” has the meaning set forth in the preamble. 

Section 1.38 “Section 2.4 Notice” has the meaning set forth in Section 2.4(c). 

Section 1.39 “Section 2.5 Notice” has the meaning set forth in Section 2.5(c). 

Section 1.40 “Tax Protection Period” means the period commencing on the Closing Date and ending on
the seventh (7th) anniversary of the Closing Date;
provided, however, that such period shall end with respect to any Protected Partner or Guaranty Partner to the extent that such Partner owns less than fifty percent (50%) of the OP Units originally received by the Protected
Partner or Guaranty Partner in the Formation Transactions, disregarding the sale, exchange or other disposition of any such OP Units sold, exchanged or otherwise disposed of by the Protected Partner or Guaranty Partner in a Permitted Disposition
(such an event, a “50% Termination”); provided further, however, that notwithstanding the forgoing, the Tax Protection Period will terminate for all Protected Partners and Guaranty Partners upon the later of the death of
Ernest Rady and the death of his wife. 
 Section 1.41 “Tax Protection Period Transfer” has the meaning set
forth in Section 2.1(a). 
 Section 1.42 “Transfer” means any direct or indirect sale, exchange,
transfer or other disposition, whether voluntary or involuntary. 
 Section 1.43 “Treasury Regulations” means
the income tax regulations under the Code, whether such regulations are in proposed, temporary or final form, as such regulations may be amended from time to time (including corresponding provisions of succeeding regulations). 

ARTICLE II 

TAX PROTECTIONS 
 Section 2.1 Taxable Transfers. 
 (a) Unless the Partners’
Representative expressly consents in writing to a Tax Protection Period Transfer (for the avoidance of doubt, no vote in favor of a Tax Protection Period Transfer by the Partners’ Representative or any of its Affiliates or by a Protected
Partner, in each case in its capacity as owner shares of the REIT or OP Units, shall constitute consent), during the Tax Protection Period, the Operating Partnership shall indemnify the Protected Partners as set forth in Section 2.2 if the
Operating Partnership or any entity in which the Operating Partnership holds a direct or indirect interest shall cause or permit (i) any Transfer of all or any portion of a Protected Property (including any interest therein or in the entity
owning, directly or indirectly, the Protected Property) in a transaction that would result in the recognition of taxable income or gain by any Protected Partner under Section 704(c) of the Code, or (ii) any Fundamental Transaction that
would result in the recognition of taxable income or gain to any Protected Partner (a Fundamental Transaction and a Transfer, collectively a “Tax Protection Period Transfer”). 

  
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 (b) Section 2.1(a) shall not apply to any Tax Protection Period Transfer of a
Protected Property (including any interest therein or in the entity owning, directly or indirectly, the Protected Property): (i) in a transaction in which no gain is required to be recognized by a Protected Partner (an
“Exchange”), including a transaction qualifying under Section 1031 or Section 721 (or any successor statutes) of the Code; provided, however, that any property acquired by the Operating Partnership in the
Exchange shall remain subject to the provisions of this Article II in place of the exchanged Protected Property for the remainder of the Tax Protection Period; (ii) as a result of the condemnation or other taking of any Protected
Property by a governmental entity in an eminent domain proceeding or otherwise, provided that the Operating Partnership shall use commercially reasonable efforts to structure such disposition as either a tax-free like-kind exchange under
Section 1031 or a tax-free reinvestment of proceeds under Section 1033, provided that in no event shall the Operating Partnership be obligated to acquire or invest in any property that it otherwise would not have acquired or invested in.

 (c) For any taxable Transfer of all or any portion of any property of the Operating Partnership which is not a Tax
Protection Period Transfer, the Operating Partnership shall use commercially reasonable efforts to cooperate with the Limited Partners to minimize any taxes payable by the Limited Partners in connection with any such Transfers. 

Section 2.2 Indemnification for Taxable Transfers. 
 (a) In the event of a Tax Protection Period Transfer described in Section 2.1(a), each Protected Partner shall, within 30 days after the closing of such Tax Protection Period Transfer, receive from
the Operating Partnership an amount of cash equal to the estimated Make Whole Amount applicable to such Tax Protection Period Transfer. If it is later determined that the true Make Whole Amount applicable to a Protected Partner exceeds the estimated
Make Whole Amount applicable to such Protected Partner, then the Operating Partnership shall pay such excess to such Protected Partner within 90 days after the closing of the Tax Protection Period Transfer, and if such estimated Make Whole Amount
exceeds the true Make Whole Amount, then such Protected Partner shall promptly refund such excess to the Operating Partnership, but only to the extent such excess was actually received by such Protected Partner. 

(b) Notwithstanding any provision of this Agreement to the contrary, the sole and exclusive rights and remedies of any Protected Partner
under Section 2.1(a) shall be a claim against the Operating Partnership for the Make Whole Amount as set forth in this Section 2.2, and no Protected Partner shall be entitled to pursue a claim for specific performance of the covenants
set forth in Section 2.1(a) or bring a claim against any person that acquires a Protected Property from the Operating Partnership in violation of Section 2.1(a). 
 Section 2.3 Section 704(c) Gains. A good faith estimate of the initial amount of Section 704(c) gain allocable to each Protected Partner as of the Closing Date of each OP Merger is set
forth on Exhibit B hereto. The parties acknowledge that the initial amount of such Section 704(c) gain may be adjusted over time as required by Section 704(c) of the Code and the Regulations promulgated thereunder. 

  
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 Section 2.4 Approved Liability Maintenance and Allocation. 

(a) During the Tax Protection Period, the Operating Partnership shall: (1) maintain on a continuous basis an amount of Approved
Liabilities at least equal to the Required Liability Amount; and (2) provide the Partners’ Representative, promptly upon request, with a description of the nature and amount of any Approved Liabilities that are available to be guarantied
by the Guaranty Partners pursuant to Section 2.4(b) of this Agreement. For the avoidance of doubt, and notwithstanding any other provision of this Agreement, the Operating Partnership shall not be required to maintain any amount of Approved
Liabilities in excess of the aggregate Required Liability Amount of all Guaranty Partners. 
 (b) (i) During the Tax Protection
Period, the Operating Partnership shall provide each Guaranty Partner with the opportunity to execute a guaranty, substantially in the form attached hereto as Exhibit F or otherwise in a form and manner that is reasonably acceptable to the
Partners’ Representative, of one or more Approved Liabilities that are Guaranty Permissible Liabilities in an amount up to such Guaranty Partner’s Required Liability Amount (each such opportunity and each opportunity required by Section
2.4(c), Section 2.5(b), and Section 2.5(c), a “Guaranty Opportunity”), and (ii) after the Tax Protection Period, and for so long as a Guaranty Partner has not had a 50% Termination, the Operating Partnership
shall use commercially reasonable efforts to make Guaranty Opportunities available to each Guaranty Partner, provided that in the case of this clause (ii), the Operating Partnership shall not be required to incur any indebtedness that it would not
otherwise have incurred, as determined by the Operating Partnership in its reasonable discretion; provided, however, that in the case of clauses (i) and (ii) the aggregate amount of all guaranties required to be made available by
the Operating Partnership for execution by all Guaranty Partners need not exceed the aggregate Required Liability Amount of all Guaranty Partners. The Operating Partnership shall have the discretion to identify the Approved Liability or Approved
Liabilities that shall be made available for guaranty by each Guaranty Partner. Each Guaranty Partner and its indirect owners may allocate the Guaranty Opportunity afforded to such Guaranty Partner in any manner they choose. The Operating
Partnership agrees to file its tax returns allocating any debt subject to a Guaranty to the applicable Guaranty Partners. Each Guaranty Partner shall bear the costs incurred by it in connection with the execution of any guaranty to which it is a
party. To the extent a Guaranty Partner executes a guaranty, the Operating Partnership shall deliver a copy of such guaranty to the lender under the Guarantied Liability promptly after receiving such copy from the relevant Guaranty Partner.

 (c) During the Tax Protection Period, the Operating Partnership shall not allow a Debt Notification Event to occur unless
the Operating Partnership provides at least thirty (30) days’ written notice (a “Section 2.4 Notice”) to each Guaranty Partner that may be affected thereby. The Section 2.4 Notice shall describe the Debt Notification
Event and designate one or more Approved Liabilities that may be guarantied by the Guaranty Partners pursuant to Section 2.4(b) of this Agreement in an amount equal to the amount of the refinanced or repaid Approved Liability that was
guarantied by such Guaranty Partner immediately prior to the date of the refinancing or repayment. Any Guaranty Partner that desires to execute a guaranty following the receipt of a Section 2.4 Notice shall provide the Operating Partnership
with notice thereof within fifteen (15) days after the date of the Section 2.4 Notice. 
 (d) Provided the Operating
Partnership satisfies its obligations under Section 2.4(a), (b) and (c) of this Agreement, it shall have no liability to a Guaranty Partner 

  
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under Section 2.4(e) for breach of Section 2.4, whether or not such Guaranty Partner accepts its Guaranty Opportunity. Furthermore, the Operating Partnership makes no representation
or warranty to any Guaranty Partner concerning the treatment or effect of any guaranty under Federal, state, local, or foreign tax law, and bears no responsibility for any tax liability of any Guaranty Partner or Affiliate thereof that is
attributable to a reallocation, by a taxing authority, of debt subject to a guaranty (other than a reallocation that results from any act or omission taken by the Operating Partnership or one of its Affiliates in violation of this Section 2.4
or an act or omission that is indemnifiable under Section 2.4(e) of this Agreement). 
 (e) If the Operating Partnership
shall fail to comply with any provision of this Section 2.4, the Operating Partnership shall pay, within thirty (30) days of such failure, a Make Whole Payment to each Guaranty Partner who recognizes income or gain as a result of such
failure equal to the estimated Make Whole Amount applicable to such failure. If it is determined that the true Make Whole Amount applicable to a Guaranty Partner exceeds the estimated Make Whole Amount applicable to such Guaranty Partner, then the
Operating Partnership shall pay such excess to such Guaranty Partner within thirty (30) days after the date of such determination, and if such estimated Make Whole Amount exceeds the true Make Whole Amount, then such Guaranty Partner shall pay
such excess to the Operating Partnership within thirty (30) days after the date of such determination, but only to the extent such excess was actually received by such Guaranty Partner. 

(f) Notwithstanding any provision of this Agreement to the contrary, the sole and exclusive rights and remedies of any Guaranty Partner
for a breach or violation of the covenants set forth in Section 2.4 shall be a claim a claim against the Operating Partnership for the Make Whole Amount as set forth in Section 2.4(e), and no Guaranty Partner shall be entitled to
pursue a claim for specific performance of the covenants set forth in Section 2.4. 
 (g) Notwithstanding any provision
of this Section 2.4 to the contrary, to the extent a Guaranty Partner is also a Non-Qualified Liability Partner that has guaranteed Non-Qualified Liabilities pursuant to Section 2.5, the amount of such guaranteed liabilities shall be
treated as the Operating Partnership’s satisfaction of that amount of its obligation to provide a Guaranty Opportunity under this Section 2.4, and such liabilities shall be treated as an Approved Liability for purposes of this Section
2.4, including for purposes of determining whether a Section 2.4 Notice and substitute Approved Liability are required. 
 Section 2.5 Non-Qualified Liability Maintenance and Allocation. 
 (a)
During the Non-Qualified Liability Period, the Operating Partnership shall not repay any Non-Qualified Liability (excluding any scheduled payments of principal occurring pursuant to the terms of such Non-Qualified Liability) which has been
guarantied by a Non-Qualified Liability Partner pursuant to Section 2.5(b) unless: (i) the Operating Partnership repays such Non-Qualified Liability with proceeds generated by its incurrence of other liabilities which each such
Non-Qualified Liability Partner is offered an opportunity to guaranty; or (ii) the Partners’ Representative consents in writing to such repayment. 

  
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 (b) During the Non-Qualified Liability Period, the Operating Partnership shall use
commercially reasonable efforts to provide each Non-Qualified Liability Partner with the opportunity to execute a guaranty, substantially in the form attached hereto as Exhibit F or otherwise in a form and manner that is reasonably acceptable
to the Partners’ Representative, of each Non-Qualified Liability listed below such Non-Qualified Liability Partner’s name in Exhibit E in an amount up to such Non-Qualified Liability Partner’s Non-Qualified Liability Amount.
Each Non-Qualified Liability Partner and its indirect owners may allocate the Guaranty Opportunity afforded to such Non-Qualified Liability Partner in any manner they choose. The Operating Partnership agrees to file its tax returns allocating any
Guarantied Liability to the applicable Non-Qualified Liability Partners. Each Non-Qualified Liability Partner shall bear the costs incurred by it in connection with the execution of any guaranty to which it is a party. To the extent a Non-Qualified
Liability Partner executes a guaranty, the Operating Partnership shall deliver a copy of such guaranty to the lender under the Guarantied Liability promptly after receiving such copy from the relevant Non-Qualified Liability Partner. 

(c) During the Non-Qualified Liability Period, if the Operating Partnership intends to repay any Non-Qualified Liability with proceeds
generated by its incurrence of other liabilities as provided in Section 2.5(a)(i), the Operating Partnership shall provide at least thirty (30) days’ written notice (a “Section 2.5 Notice”) to each Non-Qualified
Liability Partner that may be affected thereby. The Section 2.5 Notice shall describe which Non-Qualified Liability is being repaid and the nature and amount of the liability, if any, being incurred to repay such Non-Qualified Liability. The
Operating Partnership shall use commercially reasonable efforts to make available to each affected Non-Qualified Liability Partner the opportunity to guaranty any such newly-incurred liability in the same manner as provided in Section 2.5(b)
in an amount equal to the amount of the repaid Non-Qualified Liability that was guarantied by such Non-Qualified Liability Partner immediately prior to the date of the repayment. Any Non-Qualified Liability Partner that desires to execute a guaranty
following the receipt of a Section 2.5 Notice shall provide the Operating Partnership with notice thereof within fifteen (15) days after the date of the Section 2.5 Notice. 

(d) Provided the Operating Partnership satisfies its obligations under Section 2.5(a), (b) and (c) of
this Agreement, it shall have no liability to any Non-Qualified Liability Partner for breach of Section 2.5, whether or not such Non-Qualified Liability Partner accepts its Guaranty Opportunity. For the avoidance of doubt, and notwithstanding
any other provision of this Agreement, the Operating Partnership shall have no liability to any Non-Qualified Liability Partner if the Operating Partnership is unable, despite its commercially reasonable efforts, to provide each Non-Qualified
Liability Partner with the opportunity to guaranty a Non-Qualified Liability. Furthermore, the Operating Partnership makes no representation or warranty to any Non-Qualified Liability Partner concerning the treatment or effect of any guaranty under
Federal, state, local, or foreign tax law, and bears no responsibility for any tax liability of any Non-Qualified Liability Partner or Affiliate thereof that is attributable to a reallocation, by a taxing authority, of debt subject to a guaranty
(other than a reallocation that results from any act or omission taken by the Operating Partnership or one of its Affiliates in violation of this Section 2.5). 

  
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 (e) If the Operating Partnership shall fail to comply with any provision of this Section
2.5, the Operating Partnership shall pay, within thirty (30) days of such failure, a Make Whole Payment to each Non-Qualified Liability Partner who recognizes income or gain as a result of such failure equal to the estimated Make Whole
Amount applicable to such failure. If it is determined that the true Make Whole Amount applicable to a Non-Qualified Liability Partner exceeds the estimated Make Whole Amount applicable to such Non-Qualified Liability Partner, then the Operating
Partnership shall pay such excess to such Non-Qualified Liability Partner within thirty (30) days after the date of such determination, and if such estimated Make Whole Amount exceeds the true Make Whole Amount, then such Non-Qualified
Liability Partner shall pay such excess to the Operating Partnership within thirty (30) days after the date of such determination, but only to the extent such excess was actually received by such Non-Qualified Liability Partner. 

(f) Notwithstanding any provision of this Agreement to the contrary, no Non-Qualified Liability Partner shall be entitled to pursue a
claim for specific performance of the covenants set forth in Section 2.5. 
 Section 2.7 Dispute Resolution. Any
controversy, dispute, or claim of any nature arising out of, in connection with, or in relation to the interpretation, performance, enforcement or breach of this Agreement (and any closing document executed in connection herewith) shall be governed
by Section 5.08 of the Representation, Warranty and Indemnity Agreement. 
 ARTICLE III 

GENERAL PROVISIONS 
 Section 3.1 Notices. All notices, demands, declarations, consents, directions, approvals, instructions, requests and other communications required or permitted by the terms of this Agreement shall
be given in the same manner as in the OP Agreement. 
 Section 3.2 Titles and Captions. All Article or
Section titles or captions in this Agreement are for convenience only. They shall not be deemed part of this Agreement and in no way define, limit, extend or describe the scope or intent of any provisions hereof. Except as specifically provided
otherwise, references to “Articles” and “Sections” are to Articles and Sections of this Agreement. 

Section 3.3 Pronouns and Plurals. Whenever the context may require, any pronoun used in this Agreement shall include the
corresponding masculine, feminine or neuter forms, and the singular form of nouns, pronouns and verbs shall include the plural and vice versa. 
 Section 3.4 Further Action. The parties shall execute and deliver all documents, provide all information and take or refrain form taking action as may be necessary or appropriate to achieve the
purposes of this Agreement. 

  
 12 

 Section 3.5 Binding Effect. This Agreement shall be binding upon and inure to the
benefit of the parties hereto and their heirs, executors, administrators, successors, legal representatives and permitted assigns. 
 Section 3.6 Creditors. Other than as expressly set forth herein, none of the provisions of this Agreement shall be for the benefit of, or shall be enforceable by, any creditor of the Operating
Partnership. 
 Section 3.7 Waiver. No failure by any party to insist upon the strict performance of any covenant, duty,
agreement or condition of this Agreement or to exercise any right or remedy consequent upon a breach thereof shall constitute waiver of any such breach or any covenant, duty, agreement or condition. 

Section 3.8 Counterparts. This Agreement may be executed in counterparts, all of which together shall constitute one agreement
binding on all of the parties hereto, notwithstanding that all such parties are not signatories to the original or the same counterpart. Each party shall become bound by this Agreement immediately upon affixing its signature hereto. 

Section 3.9 Applicable Law. This Agreement shall be construed and enforced in accordance with and governed by the laws of the
State of California, without regard to the principles of conflicts of law. 
 Section 3.10 Invalidity of Provisions. If
any provision of this Agreement is or becomes invalid, illegal or unenforceable in any respect, the validity, legality or enforceability of other remaining provisions contained herein shall not be affected thereby. 

Section 3.11 Entire Agreement. This Agreement contains the entire understanding and agreement among the Partners with respect to
the subject matter hereof and amends, restates and supersedes the OP Agreement and any other prior written or oral understandings or agreements among them with respect thereto. 

Section 3.12 No Rights as Stockholders. Nothing contained in this Agreement shall be construed as conferring upon the holders of
the OP Units any rights whatsoever as stockholders of the REIT, including, without limitation, any right to receive dividends or other distributions made to stockholders of the REIT or to vote or to consent or to receive notice as stockholders in
respect of any meeting of stockholders for the election of directors of the REIT or any other matter. 
 [Remainder of Page
Left Blank Intentionally] 

  
 13 

 IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the date first
above written. 
  

							
	REIT:
	
	AMERICAN ASSETS TRUST, INC.,
	a Maryland corporation
		
	By:	 	 /s/ John W. Chamberlain

		 	Name:	 	 John W. Chamberlain

		 	Title:	 	 Chief Executive Officer and President

	
	OPERATING PARTNERSHIP:
	
	AMERICAN ASSETS TRUST, L.P.,
	a Maryland limited partnership
		
	By:	 	AMERICAN ASSETS TRUST, INC.
		 	 a Maryland corporation,
 Its General Partner

			
		 	By:	 	 /s/ John W. Chamberlain

		 		 	Name:	 	 John W. Chamberlain

		 		 	Title :	 	 Chief Executive Officer and President

SIGNATURE PAGE TO TAX PROTECTION AGREEMENT

 SCHEDULE I 
 PROTECTED PARTNERS 
 See attached. 

 SCHEDULE II 
 GUARANTY PARTNERS 
 See attached. 

 SCHEDULE III 
 NON-QUALIFIED LIABILITY PARTNERS 
 See attached. 

 EXHIBIT A 
 PROTECTED PROPERTIES 
  

	
	 Property Name

	 Carmel Country Plaza

	 Carmel Mountain Plaza

	 Del Monte Center

	 ICW Plaza

	 Loma Palisades

	 Lomas Santa Fe Plaza

	 Waikele Center

  
 Exhibit A-1

 EXHIBIT B 
 ESTIMATED ALLOCATIONS OF SECTION 704(c) GAIN 
 See attached. 

 EXHIBIT C 
 REQUIRED LIABILITY AMOUNT 
 See attached. 

 EXHIBIT D 
 NON-QUALIFIED LIABILITIES 
 See attached. 

 EXHIBIT E 
 NON-QUALIFIED LIABILITY AMOUNT 
 See attached. 

 EXHIBIT F 
 FORM OF GUARANTY 
 See attached.Transition Services Agreement

 Exhibit 10.4 
 TRANSITION SERVICES AGREEMENT 
 This Transition Services Agreement
(this “Agreement”) is entered as of January 19, 2011 by and among American Assets, Inc., a California corporation (“AAI”), and American Assets Trust, L.P., a Maryland limited partnership (“AAT”).
AAI and AAT are sometimes referred to individually, each as a “Party” and, collectively, as the “Parties”. 
 RECITALS 
 In consideration of the mutual promises and covenants contained
herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound hereby, the Parties do hereby agree as follows: 

AGREEMENT 
 Section 1. Services. 
 (a) During the Term (as defined in
Section 4 hereof), each of AAI and AAT shall provide to the other such services as the other shall reasonably request (the “Services”). Such Services shall be provided at reasonable times and upon reasonable notice, as
mutually agreed to by the parties. 
 Section 2. Fees. 

(a) Any Party providing Services hereunder shall provide such Services to the other Party at its fully-loaded cost. In addition, the
recipient of the Services shall reimburse the provider of the Services for any other actual and reasonable out-of-pocket costs or expenses incurred by the provider of the Services in connection with providing such Services. 

(b) Not more than thirty (30) days following the end of each calendar month during the Term, if any costs or out-of-pocket expenses
have been incurred and not previously reimbursed, the Party which has not then received such reimbursement shall invoice the other Party for the Services performed under this Agreement during the preceding calendar month. All such invoices shall be
paid in full within thirty (30) days after receipt thereof. The recipient of Services shall pay all federal, state, and local taxes based upon or arising out of such Services having been rendered under this Agreement. 

Section 3. Limitation on Damages. IN NO EVENT SHALL EITHER PARTY AND/OR ITS AFFILIATES OR ANY OF THEIR DIRECTORS, OFFICERS,
EMPLOYEES, AGENTS OR SUBCONTRACTORS BE LIABLE REGARDLESS OF THE FORM OF ACTION OR LEGAL THEORY FOR INDIRECT, SPECIAL, PUNITIVE, EXEMPLARY, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND RELATED TO THE PERFORMANCE OR NON-PERFORMANCE OF THIS
AGREEMENT INCLUDING WITHOUT LIMITATION LOST PROFITS, LOSS OF DATA (OTHER THAN LIABILITY FOR THE COST OF REENTRY OF SUCH DATA) OR BUSINESS INTERRUPTION. 

 Section 4. Effective Time; Service Period. 

(a) This Agreement shall become effective, without further action by any Party, upon the consummation of the initial public offering of
American Assets Trust, Inc (the “Effective Time”). This Agreement shall continue indefinitely, provided that either Party may terminate this Agreement upon thirty (30) days advanced written notice to the other Party. (the
“Term”). Further, either Party may terminate this Agreement immediately upon written notice to the other upon the material breach or failure by the other to perform its obligations hereunder (including any nonpayment referred to in
Section 2 above), which material breach or failure is not cured within ten (10) days after written notice of such breach or failure is given by the non-breaching Party to the breaching Party, or, in the case of nonpayment, which nonpayment
is not cured within fifteen (5) Business Days after written notice is given. 
 (b) The provisions of Sections 2, 3,
4(b), 5 and 6 shall survive any termination of this Agreement or any Services provided hereunder. 
 Section 5.
Indemnification. Each Party receiving Services hereunder hereby agrees to indemnify, protect and hold the Party providing such Services, its Affiliates and their respective employees, agents, officers, directors and representatives (each, an
“Indemnified Party) harmless from and against any and all claims, liabilities, damages, including costs or expenses related thereto and reasonable attorneys’ fees, incurred by any Indemnified Party as a result of the Party providing
such Services or any of its Affiliates providing the Services hereunder, except for losses directly resulting from the gross negligence or willful misconduct of an Indemnified Party. For purposes of this Agreement, the term
“Affiliates” shall mean, with respect to any person, another person that, directly or indirectly, through one or more intermediaries, controls, is controlled by, or is under common control with such Person. 

Section 6. Miscellaneous. 
 (a) Notice. Any notices or other communications required or permitted under, or otherwise in connection with this Agreement, shall be in writing and shall be deemed to have been duly given:
(i) when delivered in person, (ii) upon confirmation of receipt when transmitted by facsimile transmission or e-mail (but only if followed by transmittal by national overnight courier or hand for delivery on the next Business Day),
(iii) on receipt after dispatch by registered or certified mail, postage prepaid, addressed, or (iv) on the next Business Day if transmitted by national overnight courier, in each case as follows: 

 

			
	 If to AAI:
	  	American Assets, Inc.
		  	11455 El Camino Real, Suite 200
		  	San Diego, California 92130
		  	Tel: (858) 350-2600
		  	Fax: (858) 350-2620
		  	Email:
		
	If to AAT:	  	American Assets Trust, Inc.
		  	11455 El Camino Real, Suite 200
		  	San Diego, California 92130
		  	Tel: (858) 350-2600
		  	Fax: (858) 350-2620
		  	Email:

 or to such other place and with such other copies as either Party may designate as to itself by written
notice to the others. 
 (b) No Third Party Beneficiaries. Except as expressly provided herein, nothing herein is
intended to confer upon any person, other than the Parties and their respective permitted assignees, any rights, obligations or liabilities under or by reason of this Agreement. 

(c) No Assignment. Neither this Agreement nor any rights or obligations hereunder shall be assignable by either of the Parties
hereto, provided that either Party may delegate all or any portion of its obligations to perform Services under this Agreement to one or more of its Affiliates. 
 (d) Independent Contractor. The Parties hereto understand and agree that this Agreement does not make either of them an agent or legal representative of the other for any purpose whatsoever. No
Party is granted, by this Agreement or otherwise, any right or authority to assume or create any obligation or responsibility, express or implied, on behalf of or in the name of any other Party, or to bind any other Party in any manner whatsoever.
Each Party expressly acknowledges (i) that each Party is an independent contractor with respect to the other in all respects, including, without limitation, the provision of the Services, and (ii) that the Parties are not Partners, joint
venturers, employees or agents of or with each other. 
 (e) Modifications and Amendments. This Agreement may be
amended, modified, or supplemented only by written agreement of the Parties. 
 (f) Governing Law. This Agreement shall
be governed by, and construed in accordance with, the Laws of the State of California, without regard to laws that may be applicable under conflicts of laws principles. 
 (g) Headings. The underlined headings contained in this Agreement are for convenience of reference only, shall not be deemed to be a part of this Agreement and shall not be referred to in
connection with the construction or interpretation of this Agreement. 
 (h) Counterparts. This Agreement may be
executed in one or more counterparts, and by the different Parties hereto in separate counterparts, each of which when executed shall be deemed to be an original but all of which taken together shall constitute one and the same agreement with the
same effect as if the counterpart signatures were upon the same instrument. 
 (i) No Representations or Warranties. The
Parties acknowledge that neither Party has made or is making any representations or warranties whatsoever to the other, implied or otherwise, under this Agreement. 

 (j) Successors. This Agreement shall be binding upon and shall inure to the benefit
of the parties and their respective successors. 

 IN WITNESS WHEREOF, the Parties have executed this Agreement as of the date first above
written. 
  

			
	 AMERICAN ASSETS, INC.
 a California corporation

		
	By:	 	/s/ John W. Chamberlain
	Name:	 	John W. Chamberlain
	Title:	 	Chief Executive Officer

  

 

			
	 AMERICAN ASSETS TRUST, L.P.
 a Maryland limited partnership

		
	By:	 	 American Assets Trust, Inc.,
 a
Maryland corporation

	Its:	 	General Partner

  

 

			
		
	By:	 	/s/ John W. Chamberlain
	Name:	 	John W. Chamberlain
	Its:	 	President

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