VMRK

SEC source: 0000906107-26-000065 · form4.xml · derivative · entry 5

O'Shea Kevin P. · CIK 0001564771 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,522

Underlying: Common Shares Of Beneficial Interest · 28,522 shares

Expires 2036-08-17

F8 · security: On August 17, 2026, the Reporting Person received a grant of RUs in the OP in lieu of restricted shares of VMRK.

F4 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests ("OP Units") in the OP when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other conditions, OP Units are exchangeable by the holder for common shares of VMRK on a one-for-one basis or cash value of such shares, at VMRK's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F9 · derivative.exercise_date: The RUs are scheduled to vest on August 17, 2029.

SEC source: 0000906107-26-000065 · form4.xml · derivative · entry 4

O'Shea Kevin P. · CIK 0001564771 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,771

Underlying: Common Shares Of Beneficial Interest · 24,771 shares

Expires 2036-08-17

F1 · security: Pursuant to the Agreement and Plan of Merger, dated as of May 20, 2026 (the "Merger Agreement"), by and among AvalonBay Communities, Inc., a Maryland corporation ("AVB"), Vivmark Residential (f/k/a Equity Residential), a Maryland real estate investment trust ("VMRK"), ERP Operating Limited Partnership, an Illinois limited partnership (the "OP"), and Canopy Merger Sub LLC, a Maryland limited liability company ("Merger Sub"), AVB and VMRK combined in a merger of equals on August 17, 2026, with AVB merging with and into Merger Sub, with Merger Sub surviving as a wholly owned subsidiary of VMRK (the "Merger"). Merger Sub subsequently merged with and into the OP, with the OP continuing as the surviving entity.

F2 · security: Each restricted unit award is subject to the same time-based vesting conditions that were previously applicable to the AVB Performance Award with respect to a number of limited partnership interests in the OP designated as restricted units ("RUs"), rounded to the nearest whole number of RUs, equal to the product of (i) the number of shares of AVB Common Stock subject to such AVB Performance Award, determined by deeming any performance-based vesting criteria applicable to such AVB Performance Award to be achieved based on the greater of target performance and the actual level of performance (which was calculated as of the latest practicable date prior to the Effective Time and certified by the Compensation Committee of the AVB board prior to the Effective Time) and (ii) 2.793.

F3 · security: Pursuant to the Merger Agreement, each award outstanding immediately prior to the effective time of the Merger (the "Effective Time") with respect to shares of common stock, par value $0.01 per share (the "AVB Common Stock"), of AVB that vest on the basis of the achievement of applicable performance goals (each, an "AVB Performance Award") was converted into a restricted unit award, in lieu of VMRK restricted shares.

F4 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests ("OP Units") in the OP when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other conditions, OP Units are exchangeable by the holder for common shares of VMRK on a one-for-one basis or cash value of such shares, at VMRK's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F7 · derivative.exercise_date: The RUs are scheduled to vest on March 1, 2029.

SEC source: 0000906107-26-000065 · form4.xml · derivative · entry 3

O'Shea Kevin P. · CIK 0001564771 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,586

Underlying: Common Shares Of Beneficial Interest · 9,586 shares

Expires 2036-08-17

F1 · security: Pursuant to the Agreement and Plan of Merger, dated as of May 20, 2026 (the "Merger Agreement"), by and among AvalonBay Communities, Inc., a Maryland corporation ("AVB"), Vivmark Residential (f/k/a Equity Residential), a Maryland real estate investment trust ("VMRK"), ERP Operating Limited Partnership, an Illinois limited partnership (the "OP"), and Canopy Merger Sub LLC, a Maryland limited liability company ("Merger Sub"), AVB and VMRK combined in a merger of equals on August 17, 2026, with AVB merging with and into Merger Sub, with Merger Sub surviving as a wholly owned subsidiary of VMRK (the "Merger"). Merger Sub subsequently merged with and into the OP, with the OP continuing as the surviving entity.

F2 · security: Each restricted unit award is subject to the same time-based vesting conditions that were previously applicable to the AVB Performance Award with respect to a number of limited partnership interests in the OP designated as restricted units ("RUs"), rounded to the nearest whole number of RUs, equal to the product of (i) the number of shares of AVB Common Stock subject to such AVB Performance Award, determined by deeming any performance-based vesting criteria applicable to such AVB Performance Award to be achieved based on the greater of target performance and the actual level of performance (which was calculated as of the latest practicable date prior to the Effective Time and certified by the Compensation Committee of the AVB board prior to the Effective Time) and (ii) 2.793.

F3 · security: Pursuant to the Merger Agreement, each award outstanding immediately prior to the effective time of the Merger (the "Effective Time") with respect to shares of common stock, par value $0.01 per share (the "AVB Common Stock"), of AVB that vest on the basis of the achievement of applicable performance goals (each, an "AVB Performance Award") was converted into a restricted unit award, in lieu of VMRK restricted shares.

F4 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests ("OP Units") in the OP when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other conditions, OP Units are exchangeable by the holder for common shares of VMRK on a one-for-one basis or cash value of such shares, at VMRK's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F6 · derivative.exercise_date: The RUs are scheduled to vest on March 1, 2028. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until August 17, 2028.

SEC source: 0000906107-26-000065 · form4.xml · derivative · entry 2

O'Shea Kevin P. · CIK 0001564771 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,639

Underlying: Common Shares Of Beneficial Interest · 10,639 shares

Expires 2036-08-17

F1 · security: Pursuant to the Agreement and Plan of Merger, dated as of May 20, 2026 (the "Merger Agreement"), by and among AvalonBay Communities, Inc., a Maryland corporation ("AVB"), Vivmark Residential (f/k/a Equity Residential), a Maryland real estate investment trust ("VMRK"), ERP Operating Limited Partnership, an Illinois limited partnership (the "OP"), and Canopy Merger Sub LLC, a Maryland limited liability company ("Merger Sub"), AVB and VMRK combined in a merger of equals on August 17, 2026, with AVB merging with and into Merger Sub, with Merger Sub surviving as a wholly owned subsidiary of VMRK (the "Merger"). Merger Sub subsequently merged with and into the OP, with the OP continuing as the surviving entity.

F2 · security: Each restricted unit award is subject to the same time-based vesting conditions that were previously applicable to the AVB Performance Award with respect to a number of limited partnership interests in the OP designated as restricted units ("RUs"), rounded to the nearest whole number of RUs, equal to the product of (i) the number of shares of AVB Common Stock subject to such AVB Performance Award, determined by deeming any performance-based vesting criteria applicable to such AVB Performance Award to be achieved based on the greater of target performance and the actual level of performance (which was calculated as of the latest practicable date prior to the Effective Time and certified by the Compensation Committee of the AVB board prior to the Effective Time) and (ii) 2.793.

F3 · security: Pursuant to the Merger Agreement, each award outstanding immediately prior to the effective time of the Merger (the "Effective Time") with respect to shares of common stock, par value $0.01 per share (the "AVB Common Stock"), of AVB that vest on the basis of the achievement of applicable performance goals (each, an "AVB Performance Award") was converted into a restricted unit award, in lieu of VMRK restricted shares.

F4 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests ("OP Units") in the OP when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other conditions, OP Units are exchangeable by the holder for common shares of VMRK on a one-for-one basis or cash value of such shares, at VMRK's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F6 · derivative.exercise_date: The RUs are scheduled to vest on March 1, 2028. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until August 17, 2028.

SEC source: 0000906107-26-000065 · form4.xml · derivative · entry 1

O'Shea Kevin P. · CIK 0001564771 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,341

Underlying: Common Shares Of Beneficial Interest · 23,341 shares

Expires 2036-08-17

F1 · security: Pursuant to the Agreement and Plan of Merger, dated as of May 20, 2026 (the "Merger Agreement"), by and among AvalonBay Communities, Inc., a Maryland corporation ("AVB"), Vivmark Residential (f/k/a Equity Residential), a Maryland real estate investment trust ("VMRK"), ERP Operating Limited Partnership, an Illinois limited partnership (the "OP"), and Canopy Merger Sub LLC, a Maryland limited liability company ("Merger Sub"), AVB and VMRK combined in a merger of equals on August 17, 2026, with AVB merging with and into Merger Sub, with Merger Sub surviving as a wholly owned subsidiary of VMRK (the "Merger"). Merger Sub subsequently merged with and into the OP, with the OP continuing as the surviving entity.

F2 · security: Each restricted unit award is subject to the same time-based vesting conditions that were previously applicable to the AVB Performance Award with respect to a number of limited partnership interests in the OP designated as restricted units ("RUs"), rounded to the nearest whole number of RUs, equal to the product of (i) the number of shares of AVB Common Stock subject to such AVB Performance Award, determined by deeming any performance-based vesting criteria applicable to such AVB Performance Award to be achieved based on the greater of target performance and the actual level of performance (which was calculated as of the latest practicable date prior to the Effective Time and certified by the Compensation Committee of the AVB board prior to the Effective Time) and (ii) 2.793.

F3 · security: Pursuant to the Merger Agreement, each award outstanding immediately prior to the effective time of the Merger (the "Effective Time") with respect to shares of common stock, par value $0.01 per share (the "AVB Common Stock"), of AVB that vest on the basis of the achievement of applicable performance goals (each, an "AVB Performance Award") was converted into a restricted unit award, in lieu of VMRK restricted shares.

F4 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests ("OP Units") in the OP when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other conditions, OP Units are exchangeable by the holder for common shares of VMRK on a one-for-one basis or cash value of such shares, at VMRK's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F5 · derivative.exercise_date: The RUs are scheduled to vest on March 1, 2027. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until August 17, 2028.

SEC source: 0000906107-26-000064 · form4.xml · derivative · entry 1

Fenster Scott · CIK 0001722913 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,019

Underlying: Common Shares Of Beneficial Interest · 24,019 shares

Expires 2036-08-17

F1 · security: On August 17, 2026, the Reporting Person received a grant of restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP") the operating partnership of Vivmark Residential (the "Company"), in lieu of restricted shares of the Company.

F2 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F3 · derivative.exercise_date: The RUs are scheduled to vest on August 17, 2029.

SEC source: 0000906107-26-000063 · form4.xml · derivative · entry 4

Manelis Michael L · CIK 0001691784 · Executive Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,021

Underlying: Common Shares Of Beneficial Interest · 27,021 shares

Expires 2036-08-17

F4 · security: On August 17, 2026, the Reporting Person received a grant of restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP") the operating partnership of Vivmark Residential (the "Company"), in lieu of restricted shares of the Company.

F5 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F6 · derivative.exercise_date: The RUs are scheduled to vest on August 17, 2029.

SEC source: 0000906107-26-000063 · form4.xml · nonDerivative · entry 2

Manelis Michael L · CIK 0001691784 · Executive Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,713

F2 · balance_after: Direct total includes restricted shares of Vivmark Residential (formerly known as Equity Residential) scheduled to vest in the future.

SEC source: 0000906107-26-000063 · form4.xml · nonDerivative · entry 1

Manelis Michael L · CIK 0001691784 · Executive Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,538

F1 · shares: Represents restricted shares scheduled to vest on August 17, 2029.

F2 · balance_after: Direct total includes restricted shares of Vivmark Residential (formerly known as Equity Residential) scheduled to vest in the future.

SEC source: 0000906107-26-000062 · form4.xml · derivative · entry 5

Schall Benjamin · CIK 0001544531 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,040

Underlying: Common Shares Of Beneficial Interest · 50,040 shares

Expires 2036-08-17

F8 · security: On August 17, 2026, the Reporting Person received a grant of RUs in the OP in lieu of restricted shares of VMRK.

F4 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests ("OP Units") in the OP when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other conditions, OP Units are exchangeable by the holder for common shares of VMRK on a one-for-one basis or cash value of such shares, at VMRK's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F9 · derivative.exercise_date: The RUs are scheduled to vest on August 17, 2029.

SEC source: 0000906107-26-000062 · form4.xml · derivative · entry 4

Schall Benjamin · CIK 0001544531 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,156

Underlying: Common Shares Of Beneficial Interest · 78,156 shares

Expires 2036-08-17

F1 · security: Each restricted unit award is subject to the same time-based vesting conditions that were previously applicable to the AVB Performance Award with respect to a number of limited partnership interests in the OP designated as restricted units ("RUs"), rounded to the nearest whole number of RUs, equal to the product of (i) the number of shares of AVB Common Stock subject to such AVB Performance Award, determined by deeming any performance-based vesting criteria applicable to such AVB Performance Award to be achieved based on the greater of target performance and the actual level of performance (which was calculated as of the latest practicable date prior to the Effective Time and certified by the Compensation Committee of the AVB board prior to the Effective Time) and (ii) 2.793.

F2 · security: Pursuant to the Agreement and Plan of Merger, dated as of May 20, 2026 (the "Merger Agreement"), by and among AvalonBay Communities, Inc., a Maryland corporation ("AVB"), Vivmark Residential (f/k/a Equity Residential), a Maryland real estate investment trust ("VMRK"), ERP Operating Limited Partnership, an Illinois limited partnership (the "OP"), and Canopy Merger Sub LLC, a Maryland limited liability company ("Merger Sub"), AVB and VMRK combined in a merger of equals on August 17, 2026, with AVB merging with and into Merger Sub, with Merger Sub surviving as a wholly owned subsidiary of VMRK (the "Merger"). Merger Sub subsequently merged with and into the OP, with the OP continuing as the surviving entity.

F3 · security: Pursuant to the Merger Agreement, each award outstanding immediately prior to the effective time of the Merger (the "Effective Time") with respect to shares of common stock, par value $0.01 per share (the "AVB Common Stock"), of AVB that vest on the basis of the achievement of applicable performance goals (each, an "AVB Performance Award") was converted into a restricted unit award, in lieu of VMRK restricted shares.

F4 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests ("OP Units") in the OP when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other conditions, OP Units are exchangeable by the holder for common shares of VMRK on a one-for-one basis or cash value of such shares, at VMRK's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F7 · derivative.exercise_date: The RUs are scheduled to vest on 1, 2029.

SEC source: 0000906107-26-000062 · form4.xml · derivative · entry 3

Schall Benjamin · CIK 0001544531 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,240

Underlying: Common Shares Of Beneficial Interest · 30,240 shares

Expires 2036-08-17

F1 · security: Each restricted unit award is subject to the same time-based vesting conditions that were previously applicable to the AVB Performance Award with respect to a number of limited partnership interests in the OP designated as restricted units ("RUs"), rounded to the nearest whole number of RUs, equal to the product of (i) the number of shares of AVB Common Stock subject to such AVB Performance Award, determined by deeming any performance-based vesting criteria applicable to such AVB Performance Award to be achieved based on the greater of target performance and the actual level of performance (which was calculated as of the latest practicable date prior to the Effective Time and certified by the Compensation Committee of the AVB board prior to the Effective Time) and (ii) 2.793.

F2 · security: Pursuant to the Agreement and Plan of Merger, dated as of May 20, 2026 (the "Merger Agreement"), by and among AvalonBay Communities, Inc., a Maryland corporation ("AVB"), Vivmark Residential (f/k/a Equity Residential), a Maryland real estate investment trust ("VMRK"), ERP Operating Limited Partnership, an Illinois limited partnership (the "OP"), and Canopy Merger Sub LLC, a Maryland limited liability company ("Merger Sub"), AVB and VMRK combined in a merger of equals on August 17, 2026, with AVB merging with and into Merger Sub, with Merger Sub surviving as a wholly owned subsidiary of VMRK (the "Merger"). Merger Sub subsequently merged with and into the OP, with the OP continuing as the surviving entity.

F3 · security: Pursuant to the Merger Agreement, each award outstanding immediately prior to the effective time of the Merger (the "Effective Time") with respect to shares of common stock, par value $0.01 per share (the "AVB Common Stock"), of AVB that vest on the basis of the achievement of applicable performance goals (each, an "AVB Performance Award") was converted into a restricted unit award, in lieu of VMRK restricted shares.

F4 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests ("OP Units") in the OP when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other conditions, OP Units are exchangeable by the holder for common shares of VMRK on a one-for-one basis or cash value of such shares, at VMRK's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F6 · derivative.exercise_date: The RUs are scheduled to vest on March 1, 2028. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until August 17, 2028.

SEC source: 0000906107-26-000062 · form4.xml · derivative · entry 2

Schall Benjamin · CIK 0001544531 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,569

Underlying: Common Shares Of Beneficial Interest · 33,569 shares

Expires 2036-08-17

F1 · security: Each restricted unit award is subject to the same time-based vesting conditions that were previously applicable to the AVB Performance Award with respect to a number of limited partnership interests in the OP designated as restricted units ("RUs"), rounded to the nearest whole number of RUs, equal to the product of (i) the number of shares of AVB Common Stock subject to such AVB Performance Award, determined by deeming any performance-based vesting criteria applicable to such AVB Performance Award to be achieved based on the greater of target performance and the actual level of performance (which was calculated as of the latest practicable date prior to the Effective Time and certified by the Compensation Committee of the AVB board prior to the Effective Time) and (ii) 2.793.

F2 · security: Pursuant to the Agreement and Plan of Merger, dated as of May 20, 2026 (the "Merger Agreement"), by and among AvalonBay Communities, Inc., a Maryland corporation ("AVB"), Vivmark Residential (f/k/a Equity Residential), a Maryland real estate investment trust ("VMRK"), ERP Operating Limited Partnership, an Illinois limited partnership (the "OP"), and Canopy Merger Sub LLC, a Maryland limited liability company ("Merger Sub"), AVB and VMRK combined in a merger of equals on August 17, 2026, with AVB merging with and into Merger Sub, with Merger Sub surviving as a wholly owned subsidiary of VMRK (the "Merger"). Merger Sub subsequently merged with and into the OP, with the OP continuing as the surviving entity.

F3 · security: Pursuant to the Merger Agreement, each award outstanding immediately prior to the effective time of the Merger (the "Effective Time") with respect to shares of common stock, par value $0.01 per share (the "AVB Common Stock"), of AVB that vest on the basis of the achievement of applicable performance goals (each, an "AVB Performance Award") was converted into a restricted unit award, in lieu of VMRK restricted shares.

F4 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests ("OP Units") in the OP when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other conditions, OP Units are exchangeable by the holder for common shares of VMRK on a one-for-one basis or cash value of such shares, at VMRK's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F6 · derivative.exercise_date: The RUs are scheduled to vest on March 1, 2028. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until August 17, 2028.

SEC source: 0000906107-26-000062 · form4.xml · derivative · entry 1

Schall Benjamin · CIK 0001544531 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,606

Underlying: Common Shares Of Beneficial Interest · 76,606 shares

Expires 2036-08-17

F1 · security: Each restricted unit award is subject to the same time-based vesting conditions that were previously applicable to the AVB Performance Award with respect to a number of limited partnership interests in the OP designated as restricted units ("RUs"), rounded to the nearest whole number of RUs, equal to the product of (i) the number of shares of AVB Common Stock subject to such AVB Performance Award, determined by deeming any performance-based vesting criteria applicable to such AVB Performance Award to be achieved based on the greater of target performance and the actual level of performance (which was calculated as of the latest practicable date prior to the Effective Time and certified by the Compensation Committee of the AVB board prior to the Effective Time) and (ii) 2.793.

F2 · security: Pursuant to the Agreement and Plan of Merger, dated as of May 20, 2026 (the "Merger Agreement"), by and among AvalonBay Communities, Inc., a Maryland corporation ("AVB"), Vivmark Residential (f/k/a Equity Residential), a Maryland real estate investment trust ("VMRK"), ERP Operating Limited Partnership, an Illinois limited partnership (the "OP"), and Canopy Merger Sub LLC, a Maryland limited liability company ("Merger Sub"), AVB and VMRK combined in a merger of equals on August 17, 2026, with AVB merging with and into Merger Sub, with Merger Sub surviving as a wholly owned subsidiary of VMRK (the "Merger"). Merger Sub subsequently merged with and into the OP, with the OP continuing as the surviving entity.

F3 · security: Pursuant to the Merger Agreement, each award outstanding immediately prior to the effective time of the Merger (the "Effective Time") with respect to shares of common stock, par value $0.01 per share (the "AVB Common Stock"), of AVB that vest on the basis of the achievement of applicable performance goals (each, an "AVB Performance Award") was converted into a restricted unit award, in lieu of VMRK restricted shares.

F4 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests ("OP Units") in the OP when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other conditions, OP Units are exchangeable by the holder for common shares of VMRK on a one-for-one basis or cash value of such shares, at VMRK's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F5 · derivative.exercise_date: The RUs are scheduled to vest on March 1, 2027. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until August 17, 2028.

SEC source: 0000906107-26-000061 · form4.xml · derivative · entry 2

Swanezy Susan · CIK 0001684062 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,710

Underlying: Common Shares Of Beneficial Interest · 2,710 shares

Expires 2036-08-17

F2 · security: On August 17, 2026, the reporting person elected to receive a grant of Series 2026I restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP"), the operating partnership of Vivmark Residential (the "Company"), in connection with the Company's grant of long-term compensation for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders.

F3 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F4 · derivative.exercise_date: The RUs are scheduled to vest on August 17, 2027. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until August 17, 2028.

SEC source: 0000906107-26-000060 · form4.xml · nonDerivative · entry 1

NAUGHTON TIMOTHY J · CIK 0001219700 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 314,301

F1 · shares: Represents restricted shares granted for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders, which are scheduled to vest on August 17, 2027.

F2 · balance_after: Direct total includes restricted shares of Vivmark Residential scheduled to vest in the future.

SEC source: 0000906107-26-000059 · form4.xml · derivative · entry 2

MUELLER CHARLES E JR · CIK 0001195976 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,710

Underlying: Common Shares Of Beneficial Interest · 2,710 shares

Expires 2036-08-17

F2 · security: On August 17, 2026, the reporting person elected to receive a grant of Series 2026I restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP"), the operating partnership of Vivmark Residential (the "Company"), in connection with the Company's grant of long-term compensation for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders.

F3 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F4 · derivative.exercise_date: The RUs are scheduled to vest on August 17, 2027. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until August 17, 2028.

SEC source: 0000906107-26-000058 · form4.xml · derivative · entry 2

Howard Christopher B. · CIK 0001862706 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,710

Underlying: Common Shares Of Beneficial Interest · 2,710 shares

Expires 2036-08-17

F2 · security: On August 17, 2026, the reporting person elected to receive a grant of Series 2026I restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP"), the operating partnership of Vivmark Residential (the "Company"), in connection with the Company's grant of long-term compensation for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders.

F3 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F4 · derivative.exercise_date: The RUs are scheduled to vest on August 17, 2027. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until August 17, 2028.

SEC source: 0000906107-26-000057 · form4.xml · derivative · entry 1

Flynn Conor C · CIK 0001576790 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,710

Underlying: Common Shares Of Beneficial Interest · 2,710 shares

Expires 2036-08-17

F1 · security: On August 17, 2026, the reporting person elected to receive a grant of Series 2026I restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP"), the operating partnership of Vivmark Residential (the "Company"), in connection with the Company's grant of long-term compensation for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders.

F2 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F3 · derivative.exercise_date: The RUs are scheduled to vest on August 17, 2027. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until August 17, 2028.

SEC source: 0000906107-26-000056 · form4.xml · derivative · entry 1

Brown Terry S. · CIK 0001627576 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,710

Underlying: Common Shares Of Beneficial Interest · 2,710 shares

Expires 2036-08-17

F1 · security: On August 17, 2026, the reporting person elected to receive a grant of Series 2026I restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP"), the operating partnership of Vivmark Residential (the "Company"), in connection with the Company's grant of long-term compensation for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders.

F2 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F3 · derivative.exercise_date: The RUs are scheduled to vest on August 17, 2027. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until August 17, 2028.

SEC source: 0000906107-26-000055 · form4.xml · derivative · entry 1

NEITHERCUT DAVID J · CIK 0001219726 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,559

Underlying: Common Shares Of Beneficial Interest · 18,559 shares

Expires 2036-08-17

F1 · shares: Represents share options granted for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders.

SEC source: 0000906107-26-000053 · form4.xml · nonDerivative · entry 1

Jones Nina P · CIK 0002007895 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,404

F1 · shares: Represents restricted shares granted for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders, which are scheduled to vest on August 17, 2027.

F2 · balance_after: Direct total includes restricted shares of Vivmark Residential (formerly known as Equity Residential) scheduled to vest in the future.

SEC source: 0000906107-26-000052 · form4.xml · nonDerivative · entry 1

Hoff Ann · CIK 0002012803 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,330

F1 · shares: Represents restricted shares granted for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders, which are scheduled to vest on August 17, 2027.

F2 · balance_after: Direct total includes restricted shares of Vivmark Residential (formerly known as Equity Residential) scheduled to vest in the future.

SEC source: 0000906107-26-000051 · form4.xml · nonDerivative · entry 1

HABEN MARY KAY · CIK 0001190910 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,477

F1 · shares: Represents restricted shares granted for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders, which are scheduled to vest on August 17, 2027.

F2 · balance_after: Direct total includes restricted shares of Vivmark Residential (formerly known as Equity Residential) scheduled to vest in the future.

SEC source: 0000906107-26-000050 · form4.xml · nonDerivative · entry 1

Carr Chris · CIK 0001821096 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,591

F1 · shares: Represents restricted shares granted for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders, which are scheduled to vest on August 17, 2027.

F2 · balance_after: Direct total includes restricted shares of Vivmark Residential scheduled to vest in the future.

SEC source: 0000906107-26-000049 · form4.xml · derivative · entry 1

Aman Angela M · CIK 0001538554 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,710

Underlying: Common Shares Of Beneficial Interest · 2,710 shares

Expires 2036-08-17

F1 · security: On August 17, 2026, the reporting person elected to receive a grant of Series 2026I restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP"), the operating partnership of Vivmark Residential (the "Company"), in connection with the Company's grant of long-term compensation for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders.

F2 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F3 · derivative.exercise_date: The RUs are scheduled to vest on August 17, 2027. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until August 17, 2028.

SEC source: 0000906107-26-000048 · form4.xml · nonDerivative · entry 1

STERRETT STEPHEN E · CIK 0001235739 · Director · Chairman of the Board

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,773

F1 · shares: Represents restricted shares granted for prospective service from August 17, 2026 to the 2027 Annual Meeting of Shareholders, which are scheduled to vest on August 17, 2027.

F2 · balance_after: Direct total includes restricted shares of Vivmark Residential (formerly known as Equity Residential)scheduled to vest in the future.

SEC source: 0000906107-26-000033 · form4.xml · nonDerivative · entry 1

Kaufman Ian · CIK 0001381170 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,657

F1 · shares: Represents shares acquired through Vivmark Residential's (formerly known as Equity Residential) (the "Company") Employee Share Purchase Plan.

F2 · balance_after: Direct total includes restricted shares of the Company scheduled to vest in the future.

SEC source: 0000906107-26-000029 · form4.xml · nonDerivative · entry 1

STERRETT STEPHEN E · CIK 0001235739 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,551

F1 · shares: Represents restricted shares granted for prospective service from the 2026 Annual Meeting of Shareholders, which are scheduled to vest on June 18, 2027.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000028 · form4.xml · derivative · entry 1

SHAPIRO MARK S · CIK 0001345978 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,561

Underlying: Common Shares Of Beneficial Interest · 3,561 shares

Expires 2036-06-18

F1 · security: On June 18, 2026, the reporting person elected to receive a grant of Series 2026C restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP"), the OP of Equity Residential (the "Company"), in connection with the Company's annual grant of long-term compensation for prospective service from the 2026 Annual Meeting of Shareholders.

F2 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F3 · derivative.exercise_date: The RUs are scheduled to vest on June 18, 2027. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until June 18, 2028.

SEC source: 0000906107-26-000027 · form4.xml · derivative · entry 2

NEITHERCUT DAVID J · CIK 0001219726 · Director · Chairman of the Board

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,281

Underlying: Common Shares Of Beneficial Interest · 23,281 shares

Expires 2036-06-18

F1 · shares: Represents share options granted for prospective service from the 2026 Annual Meeting of Shareholders.

SEC source: 0000906107-26-000027 · form4.xml · derivative · entry 1

NEITHERCUT DAVID J · CIK 0001219726 · Director · Chairman of the Board

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,716

Underlying: Common Shares Of Beneficial Interest · 27,716 shares

Expires 2036-06-18

F1 · shares: Represents share options granted for prospective service from the 2026 Annual Meeting of Shareholders.

SEC source: 0000906107-26-000026 · form4.xml · nonDerivative · entry 1

Jones Nina P · CIK 0002007895 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,182

F1 · shares: Represents restricted shares granted for prospective service from the 2026 Annual Meeting of Shareholders, which are scheduled to vest on June 18, 2027.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000025 · form4.xml · derivative · entry 1

Huque Tahsinul Zia · CIK 0001794630 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,561

Underlying: Common Shares Of Beneficial Interest · 3,561 shares

Expires 2036-06-18

F1 · security: On June 18, 2026, the reporting person elected to receive a grant of Series 2026C restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP"), the OP of Equity Residential (the "Company"), in connection with the Company's annual grant of long-term compensation for prospective service from the 2026 Annual Meeting of Shareholders.

F2 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F3 · derivative.exercise_date: The RUs are scheduled to vest on June 18, 2027. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until June 18, 2028.

SEC source: 0000906107-26-000024 · form4.xml · nonDerivative · entry 1

Hoff Ann · CIK 0002012803 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,986

F1 · shares: Represents restricted shares granted for prospective service from the 2026 Annual Meeting of Shareholders, which are scheduled to vest on June 18, 2027.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000023 · form4.xml · nonDerivative · entry 1

HABEN MARY KAY · CIK 0001190910 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,255

F1 · shares: Represents restricted shares granted for prospective service from the 2026 Annual Meeting of Shareholders, which are scheduled to vest on June 18, 2027.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000022 · form4.xml · derivative · entry 1

Carr Chris · CIK 0001821096 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,561

Underlying: Common Shares Of Beneficial Interest · 3,561 shares

Expires 2036-06-18

F1 · security: On June 18, 2026, the reporting person elected to receive a grant of Series 2026C restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP"), the OP of Equity Residential (the "Company"), in connection with the Company's annual grant of long-term compensation for prospective service from the 2026 Annual Meeting of Shareholders.

F2 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F3 · derivative.exercise_date: The RUs are scheduled to vest on June 18, 2027. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until June 18, 2028.

SEC source: 0000906107-26-000021 · form4.xml · derivative · entry 1

Aman Angela M · CIK 0001538554 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,561

Underlying: Common Shares Of Beneficial Interest · 3,561 shares

Expires 2036-06-18

F1 · security: On June 18, 2026, the reporting person elected to receive a grant of Series 2026C restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP"), the OP of Equity Residential (the "Company"), in connection with the Company's annual grant of long-term compensation for prospective service from the 2026 Annual Meeting of Shareholders.

F2 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F3 · derivative.exercise_date: The RUs are scheduled to vest on June 18, 2027. In addition, the RUs (including any OP Units into which they may automatically convert) are subject to a holding restriction until June 18, 2028.

SEC source: 0000906107-26-000019 · form4.xml · nonDerivative · entry 1

Kaufman Ian · CIK 0001381170 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,626

F1 · shares: Represents shares acquired through Equity Residential's Employee Share Purchase Plan.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000017 · form4.xml · nonDerivative · entry 1

Kaufman Ian · CIK 0001381170 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,594

F1 · shares: Represents shares acquired through Equity Residential's Employee Share Purchase Plan.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000016 · form4.xml · nonDerivative · entry 1

Manelis Michael L · CIK 0001691784 · Executive Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,702

F1 · shares: Represents the sale of shares for the payment of tax liability incurred upon the vesting of restricted shares.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000015 · form4.xml · nonDerivative · entry 1

Kaufman Ian · CIK 0001381170 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,444

F1 · shares: Represents the sale of shares for the payment of tax liability incurred upon the vesting of restricted shares.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000014 · form4.xml · nonDerivative · entry 1

Carraway Catherine · CIK 0001841519 · EVP & CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,901

F1 · shares: Represents the sale of shares for the payment of tax liability incurred upon the vesting of restricted shares.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000010 · form4.xml · nonDerivative · entry 2

Manelis Michael L · CIK 0001691784 · Executive Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,131

F3 · shares: Represents the sale of shares for the payment of tax liability incurred upon the vesting of restricted shares.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000008 · form4.xml · nonDerivative · entry 1

Garechana Robert · CIK 0001750568 · EVP & Chief Investment Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,740

F1 · shares: Represents the sale of shares for the payment of tax liability incurred upon the vesting of restricted shares.

SEC source: 0000906107-26-000006 · form4.xml · nonDerivative · entry 2

Carraway Catherine · CIK 0001841519 · EVP & CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,339

F3 · shares: Represents the sale of shares for the payment of tax liability incurred upon the vesting of restricted shares.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000013 · form4.xml · derivative · entry 4

Parrell Mark J. · CIK 0001414146 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 144,350

Underlying: Common Shares Of Beneficial Interest · 144,350 shares

Expires 2036-02-09

F5 · derivative.exercise_date: Represents share options scheduled to vest in approximately three equal installments on February 9, 2027, February 9, 2028 and February 9, 2029.

SEC source: 0000906107-26-000013 · form4.xml · nonDerivative · entry 1

Parrell Mark J. · CIK 0001414146 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,889

F1 · shares: Represents restricted shares scheduled to vest on February 9, 2029.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000012 · form4.xml · nonDerivative · entry 1

McLeod Bret · CIK 0002081307 · EVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,404

F1 · shares: Represents restricted shares scheduled to vest on February 9, 2029.

F2 · balance_after: Direct total includes restricted shares of Equity Residential scheduled to vest in the future.

SEC source: 0000906107-26-000010 · form4.xml · derivative · entry 5

Manelis Michael L · CIK 0001691784 · Executive Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,416

Underlying: Common Shares Of Beneficial Interest · 6,416 shares

Expires 2036-02-09

F6 · security: On February 9, 2026, the reporting person received a grant of Series 2026B restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "OP"), the operating partnership of Equity Residential (the "Company"), in lieu of restricted shares of the Company as part of the Company's annual grant of long-term compensation.

F7 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the OP ("OP Units") when the capital account related to the RUs reaches a specified target for federal income tax purposes (provided such target is reached within ten years of issuance). Subject to the vesting requirements of the grant and certain other restrictions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or the cash value of such shares, at the Company's option. The RUs reflected in this report also include any OP Units into which such RUs automatically convert.

F8 · derivative.exercise_date: The Restricted Units are scheduled to vest on February 9, 2029.