Opendoor Technologies Inc.

(a) Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On October 31, 2025, Sydney Schaub notified the Company’s Chief Executive Officer of her resignation as the Company’s Chief Legal Officer, effective as of November 7, 2025. Following her resignation, the Company expects that Ms. Schaub will remain as an advisor through November 21, 2025.

On November 5, 2025, the Company appointed Giang Nguyen (LeGrice), age 44, as Chief Operating Officer of the Company. Ms. LeGrice joined the Company as Senior Vice President, Operations, in October, and she previously served as Vice-President, Operations at Shopify Inc., an all-in-one commerce platform for businesses, from May 2021 to October 2025 and as its Head of Operations from December 2020 to April 2021. Ms. LeGrice holds a Bachelor of Commerce in Actuarial Mathematics & Finance from the University of Manitoba in Canada.

(b) None.

(c) Securities Trading Arrangements of Directors and Executive Officers

Rule 10b5-1 Trading Plans

The following table describes contracts, instructions or written plans for the sale or purchase of our securities that were intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) or any “non-Rule 10b5-1 trading arrangement” by our directors or executive officers during the three-month period ended September 30, 2025.

(1)Intended to satisfy the affirmative defense of Rule 10b5-1(c)

(2)Not intended to satisfy the affirmative defense of Rule 10b5-1(c)

(3)At the time of adoption, the maximum number of shares that could be sold was unknown. The Rule 10b5-1 trading arrangement contemplated, as of the adoption date, the sale of up to 1,402,500 shares of common stock subject to RSUs previously granted to Mr. Radhakrishna that will vest at various dates between November 15, 2025 and October 15, 2026.

The aggregate number of Mr. Radhakrishna’s RSU shares that will be available for sale under the Plan is not yet determinable because the shares available will be net of shares sold to satisfy tax withholding obligations that arise in connection with the vesting and settlement of such RSU awards.

(4)At the time of adoption, the maximum number of shares that could be sold was unknown. The Rule 10b5-1 trading arrangement contemplated, as of the adoption date, the sale of up to 2,252,093 shares of common stock subject to RSUs previously granted to Mr. Freiha that were scheduled to vest or vested at various dates between November 15, 2025 and October 15, 2026, prior to Mr. Freiha’s resignation from his position as Chief Financial Officer effective September 19, 2025. The aggregate number of Mr. Freiha’s RSU shares that will be available for sale under the Plan is not yet determinable because the shares available will be net of shares sold to satisfy tax withholding obligations that arise in connection with the vesting and settlement of such RSU awards.

(5)At the time of adoption, the maximum number of shares that could be sold was unknown. The Rule 10b5-1 trading arrangement contemplated, as of the adoption date, the sale of up to 393,260 shares of common stock; however, 373,382 of such shares may be sold pursuant to a prior Rule 10b5-1 trading arrangement that will expire prior to the commencement of sales under the plan adopted on September 3, 2024. The Rule 10b5-1 trading arrangement also contemplated, as of the adoption date, the sale of up to 801,408 shares of common stock subject to RSUs previously granted to Ms. Schaub that will vest or vested at various dates between September 15, 2024 and October 15, 2025, as well as an unknown number of shares to be purchased in the future pursuant to the Company’s Employee Stock Purchase Plan. The aggregate number of Ms. Schaub’s RSU shares that will be available for sale under the Plan is not yet determinable because the shares available will be net of shares sold to satisfy tax withholding obligations that arise in connection with the vesting and settlement of such RSU awards.

Rule 10b5-1 Sell to Cover Instruction Letter

On August 5, 2025, Mr. Radhakrishna and Mr. Freiha each entered into a 10b5-1 Instruction Letter (the “Instructions”) with respect to all RSUs granted or to be granted to each of them under the Company’s equity plans or any successor plans, in order to instruct the broker(s) chosen by the Company to sell shares of common stock in order to satisfy any tax withholding obligations that arise in connection with the vesting and settlement of such RSU awards. The Instructions are intended to satisfy the affirmative defense of Rule 10b5-1(c). The aggregate number of shares to be sold under the Instructions is not determinable and there is no set expiration date for the Instructions.

On September 12, 2025, Ms. Schaub canceled the 10b5-1 Instruction Letter she had previously entered into on August 13, 2024 (the “2024 Instructions”). The 2024 Instructions covered all RSUs granted or to be granted to Ms. Schaub under the Company’s equity plans or any successor plans, in order to instruct the broker(s) chosen by the Company to sell shares of common stock in order to satisfy any tax withholding obligations that arose in connection with the vesting and settlement of such RSU awards. The 2024 Instructions were intended to satisfy the affirmative defense of Rule 10b5-1(c). The aggregate number of shares to be sold under the 2024 Instructions is not determinable and there was no set expiration date for the 2024 Instructions.

On September 12, 2025, Ms. Schaub entered into a 10b5-1 Instruction Letter (the “2025 Instructions”) with respect to all RSUs granted or to be granted to her under the Company’s equity plans or any successor plans, in order to instruct the broker(s) chosen by the Company to sell shares of common stock, beginning January 1, 2026, in order to satisfy any tax withholding obligations that arise in connection with the vesting and settlement of such RSU awards. The 2025 Instructions are intended to satisfy the affirmative defense of Rule 10b5-1(c). The aggregate number of shares to be sold under the 2025 Instructions is not determinable and there is no set expiration date for the 2025 Instructions.