AAT

aat-20260728

false000150021700015002172026-07-282026-07-28

UNITED STATES

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):

July 28, 2026

American Assets Trust, Inc.

(Exact name of registrant as specified in its charter)

Maryland 001-35030 27-3338708

(State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100

San Diego, California 92121

(Address of principal executive offices and Zip Code)

(858) 350-2600

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered

American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On July 28, 2026, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending June 30, 2026. Also on July 28, 2026, the Company made available on the “Investors” page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending June 30, 2026. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending June 30, 2026 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits.

(d)    Exhibits:

The following exhibits are filed herewith:

Exhibit Number

Exhibit Description

99.1** Press release issued by American Assets Trust, Inc. on July 28, 2026.

99.2** American Assets Trust, Inc. Supplemental Information for the quarter ended June 30, 2026.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By:

/s/ Robert F. Barton

Robert F. Barton

Executive Vice President, CFO

July 28, 2026

3

aat-20260428

false000150021700015002172026-04-282026-04-28

UNITED STATES

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 28, 2026

American Assets Trust, Inc.

(Exact name of registrant as specified in its charter)

Maryland 001-35030 27-3338708

(State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100

San Diego, California 92121

(Address of principal executive offices and Zip Code)

(858) 350-2600

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered

American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On April 28, 2026, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending March 31, 2026. Also on April 28, 2026, the Company made available on the “Investors” page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending March 31, 2026. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending March 31, 2026 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits.

(d)    Exhibits:

The following exhibits are filed herewith:

Exhibit Number

Exhibit Description

99.1** Press release issued by American Assets Trust, Inc. on April 28, 2026.

99.2** American Assets Trust, Inc. Supplemental Information for the quarter ended March 31, 2026.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By:

/s/ Robert F. Barton

Robert F. Barton

Executive Vice President, CFO

April 28, 2026

3

aat-20260203false000150021700015002172026-02-032026-02-03

UNITED STATES

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): February 3, 2026

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On February 3, 2026, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter and fiscal year ending December 31, 2025. Also on February 3, 2026, the Company made available on the “Investors” page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter and fiscal year ending December 31, 2025. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter and fiscal year ending December 31, 2025 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on February 3, 2026.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended December 31, 2025.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

February 3, 2026

3

aat-20251028false000150021700015002172025-10-282025-10-28

UNITED STATES

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): October 28, 2025

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On October 28, 2025, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending September 30, 2025. Also on October 28, 2025, the Company made available on the “Investors” page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending September 30, 2025. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending September 30, 2025 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on October 28, 2025.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended September 30, 2025.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

October 28, 2025

3

aat-20250729false000150021700015002172025-07-292025-07-29

UNITED STATES

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): July 29, 2025

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On July 29, 2025, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending June 30, 2025. Also on July 29, 2025, the Company made available on the “Investors” page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending June 30, 2025. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending June 30, 2025 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on July 29, 2025.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended June 30, 2025.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

July 29, 2025

3

aat-20250429false000150021700015002172025-04-292025-04-29

UNITED STATES

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, 2025

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On April 29, 2025, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending March 31, 2025. Also on April 29, 2025, the Company made available on the “Investors” page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending March 31, 2025. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending March 31, 2025 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on April 29, 2025.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended March 31, 2025.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

April 29, 2025

3

aat-20250204false000150021700015002172025-02-042025-02-04

UNITED STATES

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): February 4, 2025

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On February 4, 2025, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter and fiscal year ending December 31, 2024. Also on February 4, 2025, the Company made available on the “Investors” page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter and fiscal year ending December 31, 2024. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter and fiscal year ending December 31, 2024 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on February 4, 2025.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended December 31, 2024.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

February 4, 2025

3

aat-20241029false000150021700015002172024-10-292024-10-29

UNITED STATES

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): October 29, 2024

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On October 29, 2024, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending September 30, 2024. Also on October 29, 2024, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending September 30, 2024. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending September 30, 2024 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on September 30, 2024.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended September 30, 2024.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

October 29, 2024

3

aat-20240730false000150021700015002172024-07-302024-07-30

UNITED STATES

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): July 30, 2024

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On July 30, 2024, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending June 30, 2024. Also on July 30, 2024, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending June 30, 2024. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 5.02    Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On July 25, 2024, Ernest S. Rady, Chairman of the Board of Directors (the “Board”) and Chief Executive Officer of the Company, gave notice of his intention to transition from Chief Executive Officer to Executive Chairman effective as of January 1, 2025. In connection with Mr. Rady’s transition to Executive Chairman, the Company and Mr. Rady anticipate entering into an amended and restated employment agreement.

On July 25, 2024, the Board appointed Adam Wyll, the Company’s President and Chief Operating Officer, to fill the role of Chief Executive Officer at the Company effective January 1, 2025. Mr. Wyll’s position as President of the Company will remain unchanged. The full biography and other information with respect to Mr. Wyll required by Item 5.02(c) of Form 8-K are included in the Company’s proxy statement on Schedule 14A for the 2024 annual meeting of stockholders filed with the Securities and Exchange Commission on April 5, 2024 under the heading “Executive Officers,” and such biography is incorporated herein by reference. In connection with Mr. Wyll’s appointment as President and Chief Executive Officer, the Company and Mr. Wyll anticipate entering into an amended and restated employment agreement.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending June 30, 2024 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to I

aat-20240430false000150021700015002172024-04-302024-04-30

UNITED STATES

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 30, 2024

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On April 30, 2024, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending March 31, 2024. Also on April 30, 2024, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending March 31, 2024. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending March 31, 2024 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on April 30, 2024.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended March 31, 2024.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

April 30, 2024

3

aat-20240206false000150021700015002172024-02-062024-02-06

UNITED STATES

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): February 6, 2024

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On February 6, 2024, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter and fiscal year ending December 31, 2023. Also on February 6, 2024, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter and fiscal year ending December 31, 2023. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter and fiscal year ending December 31, 2023 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on February 6, 2024.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended December 31, 2023.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

February 6, 2024

3

aat-20231024false000150021700015002172023-10-242023-10-24

UNITED STATES

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): October 24, 2023

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On October 24, 2023, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending September 30, 2023. Also on October 24, 2023, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending September 30, 2023. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending September 30, 2023 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on October 24, 2023.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended September 30, 2023.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

October 24, 2023

3

aat-20230720false000150021712/3100015002172023-07-202023-07-20

UNITED STATES

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): July 20, 2023

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On July 25, 2023, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending June 30, 2023. Also on July 25, 2023, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending June 30, 2023. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.

On July 20, 2023, the Board of Directors (“Board”) of the Company adopted amendments to the Company’s amended and restated bylaws (as amended, the “Amended and Restated Bylaws”), which became effective the same day. Among other things, the amendments effected by the Amended and Restated Bylaws: a.address the universal proxy rules adopted by the U.S. Securities and Exchange Commission, by clarifying that no person may solicit proxies in support of a director nominee other than the Board’s nominees unless such person has complied with Rule 14a-19 under the Exchange Act, including applicable notice and solicitation requirements; and b.require that a stockholder directly or indirectly soliciting proxies from other stockholders use a proxy card color other than white.

The Amended and Restated Bylaws also include certain technical, conforming, modernizing or clarifying changes.

The foregoing description of the changes contained in the Amended and Restated Bylaws does not purport to be complete and is qualified in its entirety by reference to the full text of the Amended and Restated Bylaws, a copy of which is attached hereto as Exhibit 3.1 and is incorporated herein by reference.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending June 30, 2023 and made available on its website certain supplemental information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 1

aat-20230425false000150021700015002172023-04-252023-04-25

UNITED STATES

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 25, 2023

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On April 25, 2023, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending March 31, 2023. Also on April 25, 2023, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending March 31, 2023. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending March 31, 2023 and made available on its website certain supplement information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on April 25, 2023.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended March 31, 2023.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

April 25, 2023

3

aat-20230207false000150021700015002172023-02-072023-02-07

UNITED STATES

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): February 7, 2023

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On February 7, 2023, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter and fiscal year ending December 31, 2022. Also on February 7, 2023, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter and fiscal year ending December 31, 2022. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter and fiscal year ending December 31, 2022 and made available on its website certain supplement information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on February 7, 2023.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended December 31, 2022.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

February 7, 2023

3

aat-20221025false000150021700015002172022-10-252022-10-25

UNITED STATES

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): October 25, 2022

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On October 25, 2022, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending September 30, 2022. Also on October 25, 2022, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending September 30, 2022. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending September 30, 2022 and made available on its website certain supplement information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on October 25, 2022.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended September 30, 2022.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

October 25, 2022

3

aat-20220726false000150021700015002172022-07-262022-07-26

UNITED STATES

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): July 26, 2022

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On July 26, 2022, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending June 30, 2022. Also on July 26, 2022, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending June 30, 2022. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending June 30, 2022 and made available on its website certain supplement information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on July 26, 2022.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended June 30, 2022.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

July 26, 2022

3

aat-20220426false000150021700015002172022-04-262022-04-26

UNITED STATES

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 26, 2022

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On April 26, 2022, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending March 31, 2022. Also on April 26, 2022, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending March 31, 2022. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending March 31, 2022 and made available on its website certain supplement information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on April 26, 2022.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended March 31, 2022.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

April 26, 2022

3

aat-20220208false000150021700015002172022-02-082022-02-08

UNITED STATES

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): February 8, 2022

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On February 8, 2022, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter and fiscal year ending December 31, 2021. Also on February 8, 2022, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter and fiscal year ending December 31, 2021. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter and fiscal year ending December 31, 2021 and made available on its website certain supplement information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on February 8, 2022.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended December 31, 2021.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

February 8, 2022

3

aat-20211026false000150021700015002172021-10-262021-10-26

UNITED STATES

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): October 26, 2021

American Assets Trust, Inc. (Exact name of registrant as specified in its charter)

Maryland001-35030 27-3338708 (State or other jurisdiction of incorporation)(Commission File No.)(I.R.S. Employer Identification No.)

3420 Carmel Mountain Road, Suite 100 San Diego, California 92121 (Address of principal executive offices and Zip Code)

(858) 350-2600 (Registrant’s telephone number, including area code)

Not Applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Name of RegistrantTitle of each classTrading SymbolName of each exchange on which registered American Assets Trust, Inc.Common Stock, par value $0.01 per shareAATNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.

On October 26, 2021, American Assets Trust, Inc. (the “Company”) issued a press release regarding its financial results for the quarter ending September 30, 2021. Also on October 26, 2021, the Company made available on the "Investors" page of its website at www.americanassetstrust.com certain supplemental information concerning the Company’s financial results and operations for the quarter ending September 30, 2021. Copies of the press release and supplemental information are attached hereto as Exhibits 99.1 and 99.2, respectively.

Exhibits 99.1 and 99.2, are being furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 7.01    Regulation FD Disclosure.

As discussed in Item 2.02 above, the Company issued a press release regarding its financial results for the quarter ending September 30, 2021 and made available on its website certain supplement information relating thereto.

The information being furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01    Financial Statements and Exhibits. (d)    Exhibits: The following exhibits are filed herewith:

Exhibit Number Exhibit Description

99.1**Press release issued by American Assets Trust, Inc. on October 26, 2021.

99.2**American Assets Trust, Inc. Supplemental Information for the quarter ended September 30, 2021.

104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document).

** Furnished herewith

2

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 Assets Trust, Inc.

By: /s/ Robert F. Barton

Robert F. Barton Executive Vice President, CFO

October 26, 2021

3