Equity Residential (EQR)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-09-09 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: VIVMARK RESIDENTIAL (VMRK) CIK: 0000906107 --- Reporting Owner --- Name: NEITHERCUT DAVID J CIK: 0001219726 Role: Director --- Derivative Transactions --- [Transaction #1] Security: Operating Partnership Units Date: 2026-09-09 | Code: G (Gift) Shares: -1,325 | Price: $0.00 Exercise Price: $0.00 Shares Owned After: 86,745 | Ownership: I (Indirect) | Nature: LLC Footnotes: [F1] 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] 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] 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] Represents OP Units beneficially owned by a limited liability company, of which the reporting person is the manager. [Transaction #2] Security: Operating Partnership Units Date: 2026-09-09 | Code: G (Gift) Shares: +1,325 | Price: $0.00 Exercise Price: $0.00 Shares Owned After: 1,333 | Ownership: I (Indirect) | Nature: 2020 DN GRAT Footnotes: [F2] 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] 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] Represents OP Units beneficially owned by a grantor retained annuity trust for the benefit of the reporting person. [Transaction #3] Security: Operating Partnership Units Date: 2026-09-09 | Code: G (Gift) Shares: -1,322 | Price: $0.00 Exercise Price: $0.00 Shares Owned After: 11 | Ownership: I (Indirect) | Nature: 2020 DN GRAT Footnotes: [F5] This transaction involved a gift of OP Units by a grantor retained annuity trust to the reporting person. [F2] 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] 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] Represents OP Units beneficially owned by a grantor retained annuity trust for the benefit of the reporting person. [Transaction #4] Security: Operating Partnership Units Date: 2026-09-09 | Code: G (Gift) Shares: +1,322 | Price: $0.00 Exercise Price: $0.00 Shares Owned After: 426,412 | Ownership: D (Direct) Footnotes: [F2] 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] 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. [Transaction #5] Security: Operating Partnership Units Date: 2026-09-09 | Code: G (Gift) Shares: -1,325 | Price: $0.00 Exercise Price: $0.00 Shares Owned After: 85,420 | Ownership: I (Indirect) | Nature: LLC Footnotes: [F1] 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] 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] 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] Represents OP Units beneficially owned by a limited liability company, of which the reporting person is the manager. [Transaction #6] Security: Operating Partnership Units Date: 2026-09-09 | Code: G (Gift) Shares: +1,325 | Price: $0.00 Exercise Price: $0.00 Shares Owned After: 2,752 | Ownership: I (Indirect) | Nature: 2020A DN GRAT Footnotes: [F2] 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] 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] Represents OP Units beneficially owned by a grantor retained annuity trust for the benefit of the reporting person. [Transaction #7] Security: Operating Partnership Units Date: 2026-09-09 | Code: G (Gift) Shares: -977 | Price: $0.00 Exercise Price: $0.00 Shares Owned After: 1,775 | Ownership: I (Indirect) | Nature: 2020A DN GRAT Footnotes: [F5] This transaction involved a gift of OP Units by a grantor retained annuity trust to the reporting person. [F2] 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] 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] Represents OP Units beneficially owned by a grantor retained annuity trust for the benefit of the reporting person. [Transaction #8] Security: Operating Partnership Units Date: 2026-09-09 | Code: G (Gift) Shares: +977 | Price: $0.00 Exercise Price: $0.00 Shares Owned After: 427,389 | Ownership: D (Direct) Footnotes: [F2] 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] 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. --- Footnotes (Complete Index) --- F1: 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: 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: Represents OP Units beneficially owned by a limited liability company, of which the reporting person is the manager. F4: Represents OP Units beneficially owned by a grantor retained annuity trust for the benefit of the reporting person. F5: This transaction involved a gift of OP Units by a grantor retained annuity trust to the reporting person. --- Signature --- /s/ /s/ Samantha Thompson, Attorney-in-fact (2026-09-11)