The information in this preliminary prospectus supplement and the accompanying prospectus is not complete and may be changed. A registration statement relating to the securities has become effective under the Securities Act of 1933, as amended. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities and are not soliciting offers to buy these securities in any jurisdiction where the offer or sale is not permitted.
Filed Pursuant to Rule 424(b)(5)Registration No. 333-279080
SUBJECT TO COMPLETION
PRELIMINARY PROSPECTUS SUPPLEMENT DATED NOVEMBER 5, 2025
Preliminary Prospectus Supplement
(To Prospectus dated May 2, 2024)
shares

COMMON STOCK
We are offering shares of our common stock as described herein, in a registered direct offering to a limited number of purchasers pursuant to this prospectus supplement and the accompanying prospectus at a price of $ per share, which will be equal to the closing price per share of our common stock as reported by Nasdaq on the date of this prospectus supplement.
Our common stock is listed on the Nasdaq Global Select Market (“Nasdaq”) under the symbol “OPEN.” On November 4, 2025, the last reported sale price of our common stock on Nasdaq was $6.92 per share.
Investing in our common stock involves risks. See “Risk Factors” on page S-9 of this prospectus supplement and any other risk factors included in the accompanying prospectus and in the documents incorporated by reference in this prospectus supplement or the accompanying prospectus for a discussion of the factors you should carefully consider before deciding to purchase shares of our common stock.
Per Share | Total | |||||
Registered direct offering price | $ | $ | ||||
Proceeds to Opendoor Technologies Inc., before expenses | $ | $ | ||||
We expect to deliver the shares of our common stock to purchasers on or about November 13, 2025, which will be the fifth trading day following the initial trade date for the shares of our common stock offered hereby (this settlement cycle being referred to as “T+5”). Under Rule 15c6-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), trades in the secondary market generally are required to settle in one business day, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade shares prior to the business day preceding the settlement date will be required, by virtue of the fact that the shares initially will settle T+5, to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement. Purchasers of the shares who wish to trade the shares prior to the business day preceding the settlement date should consult their own advisors.
Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved these securities or determined if this prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.
The date of this prospectus supplement is November , 2025.
