SEC Form 4 · accession 0001193125-26-354224

AVALONBAY COMMUNITIES INC · AVB

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Matthew H. Birenbaum

Officer — Chief Investment Officer

Period of report

Aug 17, 2026

Accepted (ET)

Aug 17, 2026 · 4:50 pm EDT

Rule 10b5-1 plan

box not checked

Issuer CIK

0000915912

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock, par value $.01 per share^F4	Aug 17, 2026	A	27,735	$0.00	A	113,021	D
Common Stock, par value $.01 per share	Aug 17, 2026	D	113,021	$0.00	D	0	D

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Employee Stock Options (Right to Buy)^F5	$180.32	Aug 17, 2026	D	17,458	D	Mar 1, 2023	Feb 25, 2031	Common Stock	17,458	0	D

Explanation of responses

F1Represents the deemed acquisition of common stock, par value $0.01 per share ("AVB Common Stock"), of AvalonBay Communities, Inc., a Maryland corporation ("AVB"), pursuant to restricted stock units that were subject to performance-based vesting conditions (each, a "PSU"), which were previously granted to the Reporting Person. The number of PSUs reflects deemed achievement at the greater of actual performance and the target level for each respective award, as determined by the Compensation Committee of AVB effective as of the Effective Time (as defined below), and the PSUs converted into the right to receive restricted shares of Equity Residential, a Maryland real estate investment trust ("EQR") or limited partnership interests in ERP Operating Limited Partnership, an Illinois limited partnership ("ERP OP"), the operating partnership of EQR, in each case, subject to the same time-based vesting conditions that were previously applicable to the PSUs.
F2Pursuant to the Agreement and Plan of Merger, dated as of May 20, 2026 (the "Merger Agreement"), by and among AVB, EQR, ERP OP, and Canopy Merger Sub LLC, a Maryland limited liability company ("Merger Sub"), AVB and EQR 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 EQR (the "Merger"). In connection with the Merger, EQR changed its name to Vivmark Residential.
F3At the effective time of the Merger (the "Effective Time"), each issued and outstanding share of AVB Common Stock held by the Reporting Person was automatically converted into the right to receive 2.793 (the "Exchange Ratio") common shares of beneficial interest, $0.01 par value per share ("EQR Common Shares"), of EQR, plus the right to receive cash in lieu of fractional EQR Common Shares, if any, into which such AVB Common Stock would have been converted. On August 14, 2026, the closing price of AVB Common Stock was $184.06 per share and the closing price of EQR Common Shares was $65.97 per share.
F4This total includes shares of AVB Common Stock, restricted shares, PSUs deemed to have been earned as of the Effective Time and shares acquired through AVB's Employee Stock Purchase Plan.
F5Pursuant to the Merger Agreement, effective as of the Effective Time, the Reporting Person's options to acquire AVB Common Stock that were outstanding at the Effective Time were converted into the right to receive options to acquire EQR Common Shares, where the number of EQR Common Shares subject to such converted option is equal to (i) the number of shares of AVB Common Stock subject to the corresponding AVB option award immediately prior to the Effective Time multiplied by (ii) the Exchange Ratio (rounded down to the nearest whole number of shares), and the exercise price of each converted option award is equal to (A) the exercise price of the corresponding AVB option award immediately prior to the Effective Time divided by (B) the Exchange Ratio (rounded up to the nearest whole cent).