Sec Form 4 Filing - Barton Robert F. @ American Assets Trust, Inc. - 2021-12-09

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Barton Robert F. 2. Issuer Name and Ticker or Trading Symbol American Assets Trust, Inc. [ AAT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Executive Vice President & CFO (Last) (First) (Middle) C/O AMERICAN ASSETS TRUST, INC., 3420 CARMEL MOUNTAIN ROAD, SUITE 100 3. Date of Earliest Transaction (MM/DD/YY) 12/09/2021 (Street) SAN DIEGO, CA92121 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock, par value $0.01 12/09/2021 F 11,003 D $ 34.4 53,416 D Common Stock, par value $0.01 12/09/2021 A( 1 ) 39,445 A $ 0 92,861 D Common Stock, par value $0.01 90,807 I See Footnote( 2 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) ( D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Barton Robert F. C/O AMERICAN ASSETS TRUST, INC. 3420 CARMEL MOUNTAIN ROAD, SUITE 100 SAN DIEGO, CA92121 Executive Vice President & CFO Signatures /s/ Adam Wyll, Attorney-in-fact 12/10/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares of restricted common stock issued pursuant to the American Assets Trust, Inc. and American Assets Trust, L.P. Amended and Restated 2011 Equity Incentive Award Plan. ( 2 )Represents shares held by the Robert and Katherine Barton Living Trust 2007 dated 4/21/2007, for which the Reporting Person is a trustee and beneficiary. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of his pecuniary interest therein.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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