VMRK

SEC source: 0000906107-26-000078 · form4.xml · derivative · entry 8

NEITHERCUT DAVID J · CIK 0001219726 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 427,389

Underlying: Common Shares Of Beneficial Interest · 977 shares

Expires not disclosed

F2 · derivative.exercise_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F2 · derivative.expiration_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

SEC source: 0000906107-26-000078 · form4.xml · derivative · entry 7

NEITHERCUT DAVID J · CIK 0001219726 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · 2020A DN GRAT

Disclosed balance after: 1,775

Underlying: Common Shares Of Beneficial Interest · 977 shares

Expires not disclosed

F5 · shares: This transaction involved a gift of OP Units by a grantor retained annuity trust to the reporting person.

F2 · derivative.exercise_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F2 · derivative.expiration_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F4 · balance_after: Represents OP Units beneficially owned by a grantor retained annuity trust for the benefit of the reporting person.

SEC source: 0000906107-26-000078 · form4.xml · derivative · entry 6

NEITHERCUT DAVID J · CIK 0001219726 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · 2020A DN GRAT

Disclosed balance after: 2,752

Underlying: Common Shares Of Beneficial Interest · 1,325 shares

Expires not disclosed

F2 · derivative.exercise_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F2 · derivative.expiration_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F4 · balance_after: Represents OP Units beneficially owned by a grantor retained annuity trust for the benefit of the reporting person.

SEC source: 0000906107-26-000078 · form4.xml · derivative · entry 5

NEITHERCUT DAVID J · CIK 0001219726 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · LLC

Disclosed balance after: 85,420

Underlying: Common Shares Of Beneficial Interest · 1,325 shares

Expires not disclosed

F1 · shares: This transaction involved a gift of OP Units by a limited liability company of which the reporting person is the manager to a grantor retained annuity trust for the benefit of the reporting person.

F2 · derivative.exercise_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F2 · derivative.expiration_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F3 · balance_after: Represents OP Units beneficially owned by a limited liability company, of which the reporting person is the manager.

SEC source: 0000906107-26-000078 · form4.xml · derivative · entry 4

NEITHERCUT DAVID J · CIK 0001219726 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 426,412

Underlying: Common Shares Of Beneficial Interest · 1,322 shares

Expires not disclosed

F2 · derivative.exercise_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F2 · derivative.expiration_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

SEC source: 0000906107-26-000078 · form4.xml · derivative · entry 3

NEITHERCUT DAVID J · CIK 0001219726 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · 2020 DN GRAT

Disclosed balance after: 11

Underlying: Common Shares Of Beneficial Interest · 1,322 shares

Expires not disclosed

F5 · shares: This transaction involved a gift of OP Units by a grantor retained annuity trust to the reporting person.

F2 · derivative.exercise_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F2 · derivative.expiration_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F4 · balance_after: Represents OP Units beneficially owned by a grantor retained annuity trust for the benefit of the reporting person.

SEC source: 0000906107-26-000078 · form4.xml · derivative · entry 2

NEITHERCUT DAVID J · CIK 0001219726 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · 2020 DN GRAT

Disclosed balance after: 1,333

Underlying: Common Shares Of Beneficial Interest · 1,325 shares

Expires not disclosed

F2 · derivative.exercise_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F2 · derivative.expiration_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F4 · balance_after: Represents OP Units beneficially owned by a grantor retained annuity trust for the benefit of the reporting person.

SEC source: 0000906107-26-000078 · form4.xml · derivative · entry 1

NEITHERCUT DAVID J · CIK 0001219726 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · LLC

Disclosed balance after: 86,745

Underlying: Common Shares Of Beneficial Interest · 1,325 shares

Expires not disclosed

F1 · shares: This transaction involved a gift of OP Units by a limited liability company of which the reporting person is the manager to a grantor retained annuity trust for the benefit of the reporting person.

F2 · derivative.exercise_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F2 · derivative.expiration_date: The OP Units reflected in this report are previously reported Restricted Units which have automatically converted to OP Units per their terms. The OP Units do not expire and are fully vested, transferable and can be exchanged by the holder for common shares of Vivmark Residential (the "Company") on a one-for-one basis or, at the Company's option, for the cash value of such shares.

F3 · balance_after: Represents OP Units beneficially owned by a limited liability company, of which the reporting person is the manager.

SEC source: 0000906107-26-000077 · form4.xml · nonDerivative · entry 1

Carr Chris · CIK 0001821096 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,461

F1 · balance_after: Direct total includes restricted shares of Vivmark Residential scheduled to vest in the future.

SEC source: 0000906107-26-000076 · form4.xml · derivative · entry 7

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,805

Underlying: Common Shares Of Beneficial Interest · 13,805 shares

Expires 2036-01-01

F11 · security: Represents RUs in the Operating Partnership retained in connection with the settlement of an award under the Company's 2026 Long-Term Incentive Plan.

F7 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the Operating Partnership ("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 conditions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or 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.

F12 · derivative.exercise_date: The RUs are scheduled to vest on January 2, 2029.

SEC source: 0000906107-26-000076 · form4.xml · derivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,310

Underlying: Common Shares Of Beneficial Interest · 11,310 shares

Expires 2035-01-01

F9 · security: Represents RUs in the Operating Partnership retained in connection with the settlement of an award under the Company's 2025 Long-Term Incentive Plan.

F7 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the Operating Partnership ("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 conditions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or 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.

F10 · derivative.exercise_date: The RUs are scheduled to vest on January 3, 2028.

SEC source: 0000906107-26-000076 · 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: 11,055

Underlying: Common Shares Of Beneficial Interest · 11,055 shares

Expires 2034-01-01

F6 · security: Represents restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "Operating Partnership"), the operating partnership of the Company, retained in connection with the settlement of an award under the Company's 2024 Long-Term Incentive Plan.

F7 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the Operating Partnership ("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 conditions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or 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 RUs are scheduled to vest on January 4, 2027.

SEC source: 0000906107-26-000076 · form4.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 79,270

F4 · shares: Represents restricted shares of the Company issued in connection with the settlement of an award under the Company's 2026 Long-Term Incentive Plan which are scheduled to vest on January 2, 2029.

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

SEC source: 0000906107-26-000076 · 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: 66,069

F3 · shares: Represents restricted shares of the Company issued in connection with the settlement of an award under the Company's 2025 Long-Term Incentive Plan which are scheduled to vest on January 3, 2028.

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

SEC source: 0000906107-26-000076 · 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: 55,249

F1 · shares: Represents restricted shares of Vivmark Residential (formerly known as Equity Residential) (the "Company") issued in connection with the settlement of an award under the Company's 2024 Long-Term Incentive Plan which are scheduled to vest on January 4, 2027.

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

SEC source: 0000906107-26-000075 · form4.xml · derivative · entry 6

Fenster Scott · CIK 0001722913 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,397

Underlying: Common Shares Of Beneficial Interest · 14,397 shares

Expires 2036-01-01

F10 · security: Represents RUs in the Operating Partnership retained in connection with the settlement of an award under the Company's 2026 Long-Term Incentive Plan.

F6 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the Operating Partnership ("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 conditions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or 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.

F11 · derivative.exercise_date: The RUs are scheduled to vest on January 2, 2029.

SEC source: 0000906107-26-000075 · form4.xml · derivative · entry 5

Fenster Scott · CIK 0001722913 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,792

Underlying: Common Shares Of Beneficial Interest · 4,792 shares

Expires 2035-01-01

F8 · security: Represents RUs in the Operating Partnership retained in connection with the settlement of an award under the Company's 2025 Long-Term Incentive Plan.

F6 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the Operating Partnership ("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 conditions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or 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.

F9 · derivative.exercise_date: The RUs are scheduled to vest on January 3, 2028.

SEC source: 0000906107-26-000075 · form4.xml · derivative · entry 4

Fenster Scott · CIK 0001722913 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,233

Underlying: Common Shares Of Beneficial Interest · 9,233 shares

Expires 2034-01-01

F5 · security: Represents restricted limited partnership interests ("RUs") in ERP Operating Limited Partnership (the "Operating Partnership"), the operating partnership of the Company, retained in connection with the settlement of an award under the Company's 2024 Long-Term Incentive Plan.

F6 · derivative.exercise_price: RUs are a class of partnership interest that automatically convert into an equal number of limited partnership interests of the Operating Partnership ("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 conditions, OP Units are exchangeable by the holder for common shares of the Company on a one-for-one basis or 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.

F7 · derivative.exercise_date: The RUs are scheduled to vest on January 4, 2027.

SEC source: 0000906107-26-000075 · form4.xml · nonDerivative · entry 1

Fenster Scott · CIK 0001722913 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,022

F1 · shares: Represents restricted shares of Vivmark Residential (formerly known as Equity Residential) (the "Company") issued in connection with the settlement of an award under the Company's 2025 Long-Term Incentive Plan which are scheduled to vest on January 3, 2028.

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

SEC source: 0000906107-26-000073 · form4.xml · nonDerivative · entry 1

Willson Sean Thomas · CIK 0002048274 · Senior Vice President & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,988

F1 · balance_after: Direct total includes restricted shares of the Company scheduled to vest in the future.

SEC source: 0000906107-26-000072 · form4.xml · nonDerivative · entry 1

Birenbaum Matthew H. · CIK 0001532949 · Executive Vice President & CDO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 272,749

F1 · balance_after: Direct total includes restricted shares of the Company scheduled to vest in the future.

SEC source: 0000906107-26-000071 · form4.xml · nonDerivative · entry 3

Willson Sean Thomas · CIK 0002048274 · Senior Vice President & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,288

F4 · balance_after: Direct total includes restricted shares of VMRK scheduled to vest in the future.

SEC source: 0000906107-26-000070 · form4.xml · nonDerivative · entry 1

SCHULMAN EDWARD M · CIK 0001219716 · EVP, Legal Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,776

F1 · price: The price represents the weighted average price of the shares sold. The shares were sold within a range of $64.11 to $64.39. The reporting person will provide, upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price.

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

SEC source: 0000906107-26-000061 · form4.xml · nonDerivative · entry 1

Swanezy Susan · CIK 0001684062 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,934

F1 · price: The price represents the weighted average price of the shares sold. The shares were sold within a range of $63.79 to $63.85. The reporting person will provide, upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0000906107-26-000059 · form4.xml · nonDerivative · entry 1

MUELLER CHARLES E JR · CIK 0001195976 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,084

F1 · price: The price represents the weighted average price of the shares sold. The shares were sold within a range of $63.85 to $63.97. The reporting person will provide, upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0000906107-26-000058 · form4.xml · nonDerivative · entry 1

Howard Christopher B. · CIK 0001862706 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,730

F1 · price: The price represents the weighted average price of the shares sold. The shares were sold within a range of $64.00 to $64.04. The reporting person will provide, upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0000906107-26-000071 · form4.xml · nonDerivative · entry 2

Willson Sean Thomas · CIK 0002048274 · Senior Vice President & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,538

F5 · shares: Represents restricted shares scheduled to vest on August 17, 2029.

F4 · balance_after: Direct total includes restricted shares of VMRK scheduled to vest in the future.

SEC source: 0000906107-26-000071 · form4.xml · nonDerivative · entry 1

Willson Sean Thomas · CIK 0002048274 · Senior Vice President & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,486

F1 · kind: 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 · kind: 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 VMRK restricted share award.

F3 · kind: Each VMRK restricted share 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 common shares of beneficial interest, $0.01 par value per share ("VMRK Common Shares"), of VMRK, rounded to the nearest whole number of shares, 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.

F4 · balance_after: Direct total includes restricted shares of VMRK scheduled to vest in the future.

SEC source: 0000906107-26-000070 · form4.xml · derivative · entry 6

SCHULMAN EDWARD M · CIK 0001219716 · EVP, Legal Affairs

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

F10 · security: On August 17, 2026, the Reporting Person received a grant of RUs in the OP in lieu of restricted shares of VMRK.

F6 · 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.

F11 · derivative.exercise_date: The RUs are scheduled to vest on August 17, 2029

SEC source: 0000906107-26-000070 · form4.xml · derivative · entry 5

SCHULMAN EDWARD M · CIK 0001219716 · EVP, Legal Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,960

Underlying: Common Shares Of Beneficial Interest · 12,960 shares

Expires 2036-08-17

F3 · 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.

F4 · 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"), 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.

F5 · 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.

F6 · 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 March 1, 2029.

SEC source: 0000906107-26-000070 · form4.xml · derivative · entry 4

SCHULMAN EDWARD M · CIK 0001219716 · EVP, Legal Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,016

Underlying: Common Shares Of Beneficial Interest · 5,016 shares

Expires 2036-08-17

F3 · 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.

F4 · 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"), 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.

F5 · 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.

F6 · 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.

F8 · 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: 0000906107-26-000070 · form4.xml · derivative · entry 3

SCHULMAN EDWARD M · CIK 0001219716 · EVP, Legal Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,566

Underlying: Common Shares Of Beneficial Interest · 5,566 shares

Expires 2036-08-17

F3 · 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.

F4 · 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"), 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.

F5 · 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.

F6 · 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.

F8 · 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: 0000906107-26-000070 · form4.xml · derivative · entry 2

SCHULMAN EDWARD M · CIK 0001219716 · EVP, Legal Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,124

Underlying: Common Shares Of Beneficial Interest · 12,124 shares

Expires 2036-08-17

F3 · 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.

F4 · 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"), 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.

F5 · 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.

F6 · 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, 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: 0000906107-26-000069 · form4.xml · derivative · entry 5

Walsh Alaine Susan · CIK 0002009341 · EVP, Human Capital & Admin

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,007

Underlying: Common Shares Of Beneficial Interest · 9,007 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: 0000906107-26-000069 · form4.xml · derivative · entry 4

Walsh Alaine Susan · CIK 0002009341 · EVP, Human Capital & Admin

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,667

Underlying: Common Shares Of Beneficial Interest · 3,667 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 March 1, 2029.

SEC source: 0000906107-26-000069 · form4.xml · derivative · entry 3

Walsh Alaine Susan · CIK 0002009341 · EVP, Human Capital & Admin

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,422

Underlying: Common Shares Of Beneficial Interest · 1,422 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: 0000906107-26-000069 · form4.xml · derivative · entry 2

Walsh Alaine Susan · CIK 0002009341 · EVP, Human Capital & Admin

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,575

Underlying: Common Shares Of Beneficial Interest · 1,575 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: 0000906107-26-000069 · form4.xml · derivative · entry 1

Walsh Alaine Susan · CIK 0002009341 · EVP, Human Capital & Admin

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,363

Underlying: Common Shares Of Beneficial Interest · 3,363 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: 0000906107-26-000068 · form4.xml · nonDerivative · entry 2

Thomas Pamela Rogers · CIK 0002028044 · EVP, Portfolio & Asset Mgmt

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,543

F5 · shares: Represents restricted shares scheduled to vest on August 17, 2029.

F4 · balance_after: Direct total includes restricted shares of VMRK scheduled to vest in the future.

SEC source: 0000906107-26-000068 · form4.xml · nonDerivative · entry 1

Thomas Pamela Rogers · CIK 0002028044 · EVP, Portfolio & Asset Mgmt

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,693

F1 · kind: 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 · kind: 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 VMRK restricted share award.

F3 · kind: Each VMRK restricted share 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 common shares of beneficial interest, $0.01 par value per share ("VMRK Common Shares"), of VMRK, rounded to the nearest whole number of shares, 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.

F4 · balance_after: Direct total includes restricted shares of VMRK scheduled to vest in the future.

SEC source: 0000906107-26-000067 · form4.xml · derivative · entry 5

Birenbaum Matthew H. · CIK 0001532949 · Executive Vice President & CDO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,525

Underlying: Common Shares Of Beneficial Interest · 31,525 shares

Expires 2036-08-17

F11 · 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.

F8 · 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.

F12 · derivative.exercise_date: The RUs are scheduled to vest on August 17, 2029.

SEC source: 0000906107-26-000067 · form4.xml · derivative · entry 4

Birenbaum Matthew H. · CIK 0001532949 · Executive Vice President & CDO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,018

Underlying: Common Shares Of Beneficial Interest · 15,018 shares

Expires 2036-08-17

F5 · 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.

F6 · 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.

F7 · 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.

F8 · 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.

F10 · derivative.exercise_date: The RUs are scheduled to vest on March 1, 2029.

SEC source: 0000906107-26-000067 · form4.xml · derivative · entry 3

Birenbaum Matthew H. · CIK 0001532949 · Executive Vice President & CDO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,292

Underlying: Common Shares Of Beneficial Interest · 13,292 shares

Expires 2036-08-17

F5 · 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.

F6 · 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.

F7 · 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.

F8 · 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 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: 0000906107-26-000067 · form4.xml · derivative · entry 2

Birenbaum Matthew H. · CIK 0001532949 · Executive Vice President & CDO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,208

Underlying: Common Shares Of Beneficial Interest · 13,208 shares

Expires 2036-08-17

F5 · 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.

F6 · 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.

F7 · 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.

F8 · 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 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: 0000906107-26-000067 · form4.xml · nonDerivative · entry 1

Birenbaum Matthew H. · CIK 0001532949 · Executive Vice President & CDO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 274,149

F1 · kind: 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 · kind: 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 VMRK restricted share award.

F3 · kind: Each VMRK restricted share 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 common shares of beneficial interest, $0.01 par value per share ("VMRK Common Shares"), of VMRK, rounded to the nearest whole number of shares, 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.

F4 · balance_after: Direct total includes restricted shares of VMRK scheduled to vest in the future.

SEC source: 0000906107-26-000066 · form4.xml · derivative · entry 5

Breslin Sean J. · CIK 0001463826 · EVP & CI & GO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,525

Underlying: Common Shares Of Beneficial Interest · 31,525 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: 0000906107-26-000066 · form4.xml · derivative · entry 4

Breslin Sean J. · CIK 0001463826 · EVP & CI & GO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,056

Underlying: Common Shares Of Beneficial Interest · 28,056 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 March 1, 2029.

SEC source: 0000906107-26-000066 · form4.xml · derivative · entry 3

Breslin Sean J. · CIK 0001463826 · EVP & CI & GO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,856

Underlying: Common Shares Of Beneficial Interest · 10,856 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: 0000906107-26-000066 · form4.xml · derivative · entry 2

Breslin Sean J. · CIK 0001463826 · EVP & CI & GO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,052

Underlying: Common Shares Of Beneficial Interest · 12,052 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: 0000906107-26-000066 · form4.xml · derivative · entry 1

Breslin Sean J. · CIK 0001463826 · EVP & CI & GO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,500

Underlying: Common Shares Of Beneficial Interest · 26,500 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.