UDR不动产信托美股招股说明书(2026-07-21版)

UDR,Inc. DIVIDEND REINVESTMENT AND STOCK PURCHASE PLAN This prospectus supplement amends and supplements the Prospectus dated November16,2005, included in Form S-3 filed by UDR, Inc. (the “Company”) (successor by mergertoUnited Dominion Realty Trust, Inc.) with the Securities and Exchange Commission onNovember16, 2005 (the “Prospectus”), relating to our Dividend Reinvestment and StockPurchase Plan (the “Plan”). This prospectus supplement should be read in conjunction withthe Prospectus, is qualified by reference to the Prospectus, and may not be delivered withoutthe Prospectus. Except as expressly stated below as supplementing or superseding theinformation contained in the Prospectus, all other information set forth in the Prospectus isunchanged. Capitalized terms used in this prospectus supplement but not defined herein willhave the same meanings as specified in the Prospectus. Our common stock is traded on the New York Stock Exchange under the symbol “UDR.” OnJuly 20, 2026, the last reported sale price of our common stock on the New York StockExchange was $39.74 per share. This prospectus supplement constitutes part of the Prospectus and should be retained forfuture reference. Investing in our securities involves various risks. See “Risk Factors” on page3 of theaccompanying Prospectus as well as the risk factors contained in documents we file withthe Securities and Exchange Commission and which are incorporated by reference inthis prospectus supplement and the accompanying Prospectus. Neither the Securities and Exchange Commission nor any state securities commissionhas approved or disapproved of these securities or determined if this prospectussupplement or the prospectus is truthful or complete. Any representation to thecontrary is a criminal offense. The date of this prospectus supplement is July 21, 2026. The following information supplements and updates the information contained in theProspectus. (1) All references to “United Dominion Realty Trust, Inc.” and any other terms that referthereto in the Prospectus are replaced with “UDR, Inc.” and references thereto. Thereference to our website at “www.udrt.com” is replaced with “www.udr.com.” (2) All references to “quarter” and “quarterly” are replaced with “month” and “monthly,”respectively. (3) All references in the Prospectus to “$25,000” in relation to the maximum amount ofadditional cash payments that a participant may make in the Plan per quarter arereplaced with references to “$8,333.” (4) All references to “8.60% SeriesB Cumulative Redeemable Preferred Stock” and anyother terms that refer thereto, and all disclosures related thereto, are hereby deleted. (5) All references to “Wells Fargo Shareowner Services,” “Wells Fargo Bank, N.A” andany other terms that refer thereto are replaced with references to “Equiniti TrustCompany, LLC.” (6) In response to question number 2. (“What are the advantages and possibledisadvantages of the Plan?”) ●The emphasized language is added to the response relating to statements:“Statements. Regular statements of account will be mailed to Planparticipants after each investment to provide simplified record-keeping.Youmay elect to have your statements and other information sent to youautomatically by initiating eDelivery through shareowneronline.com.” ●The dollar amount in the following response is updated from $25,000 to$50,000 and the emphasized language is added: “Telephone Privileges. If youhave established automated privileges on your account, you can… sell someor all of your Plan shares if the current market value of the shares to be soldis$50,000or less(certain restrictions may apply).” (7) The answer to question number 4. (“Who administers the Plan for the Planparticipants?”) is hereby replaced in its entirety with the following: “Equiniti Trust Company, LLC (“Equiniti”) administers the Plan and also serves asour transfer agent. The Plan Administrator holds certificates for shares of common stock heldin your Plan account, keeps records and sends statements of your account to you. Sharespurchased under the Plan are registered in the name of the Plan Administrator or its nominee,as agent, and credited to the accounts of Plan participants. All communications regarding the Plan should be sent to: UDR, Inc.Dividend Reinvestment and Stock Purchase PlanEquiniti Trust Company, LLCP.O. Box 64856St. Paul, MN 55164-0856 For Certified/Overnight Mail:Equiniti Trust Company, LLC1110 Centre Pointe Curve, Suite 101Mendota Heights, MN 55120-4100 General Information:Tel: 1-800-468-9716 Tel: 651-450-4064 (outside the United States) An automated voice response system is available 24 hours a day, 7days a week.Customer Care Specialists are available from 7:00 a.m. to 7:00 p.m., Central Time,Monday through Friday. Internet: shareowneronline.com Available 24 hours a day, 7 days a week for access to your account information andanswers for many common questions and general inquiries. To register for online access