Opendoor Technologies Inc.

(a) None.

(b) 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 December 31, 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)As of December 10, 2025, Mr. Radhakrishna is no longer an officer as defined in Rule 16a-1.

(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 2,826,250 shares of common stock subject to RSUs previously granted to Mr. Radhakrishna that will vest or vested at various dates between November 15, 2025 and November 15, 2026, 35,000 shares held directly by Mr. Radhakrishna, 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 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.

Rule 10b5-1 Sell to Cover Instruction Letter

On November 11, 2025, Ms. Christina Schwartz, our Chief Financial Officer and former interim Chief Financial Officer, entered into a 10b5-1 Instruction Letter (the “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 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.