Filed pursuant to Rule 424(b)(3)
Registration Statement No. 333-251529

Prospectus Supplement No. 6

(To Prospectus dated March 12, 2021)

OPENDOOR TECHNOLOGIES INC.

This prospectus supplement updates, amends and supplements the prospectus dated March 12, 2021 (the “Prospectus”), which forms a part of our Registration Statement on Form S-1 (Registration No. 333-251529). Capitalized terms used in this prospectus supplement and not otherwise defined herein have the meanings specified in the Prospectus.

This prospectus supplement is being filed to update, amend and supplement the information included in the Prospectus with the information contained in our Current Report on Form 8-K filed with the SEC on July 30, 2021, which is set forth below.

This prospectus supplement is not complete without the Prospectus. This prospectus supplement should be read in conjunction with the Prospectus, which is to be delivered with this prospectus supplement, and is qualified by reference thereto, except to the extent that the information in this prospectus supplement updates or supersedes the information contained in the Prospectus. Please keep this prospectus supplement with your Prospectus for future reference.

Opendoor Technologies Inc.’s common stock is quoted on the Nasdaq Global Select Market under the symbol “OPEN.” On July 29, 2021, the closing price of our common stock was $14.97 per share.

INVESTING IN OUR SECURITIES INVOLVES CERTAIN RISKS. SEE “RISK FACTORS” BEGINNING ON PAGE 6 OF THE PROSPECTUS.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if the Prospectus or this prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus supplement is July 30, 2021

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): July 27, 2021

Opendoor Technologies Inc.

(Exact name of registrant as specified in its charter)

(415) 896-6737

(Registrant’s telephone number, including area code)

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company  ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ¨

On July 27, 2021, Elizabeth Stevens notified Opendoor Technologies Inc. (the “Company”) of her resignation as the Company's Head of Legal, effective September 1, 2021. Vanessa Gage, the Company's Deputy General Counsel, will serve as Interim Head of Legal beginning on September 1, 2021. The Company will search for a permanent successor to Ms. Stevens.

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.