VMRK: Other company developments

Item 8.01. Other Events. On August 12, 2026, the Company and AvalonBay issued a joint press release announcing the results of the Special Meeting and the results of the special meeting of AvalonBay’s stockholders also held on August 12, 2026. A copy of the joint press release is attached as Exhibit 99.1 and is incorporated herein by reference. Item 9.01 Financial Statements and Exhibits (d) Exhibits Exhibit Number Description 99.1 Joint Press Release, dated August 12, 2026 104 Cover Page Interactive Data File (embedded within the Inline XBRL document). -3- SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. EQUITY RESIDENTIAL Date: August 12, 2026 By: /s/ Scott J. Fenster Name: Scott J. Fenster Its: Executive Vice President, General Counsel and Corporate Secretary -4-