Opendoor Technologies Inc.

(a) None.

(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 March 31, 2026.

(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 859,977 shares of common stock subject to RSUs previously granted to Ms. Schwartz that will vest at various dates between May 15, 2026 and July 15, 2027, 63,701 stock options, and 59,595 shares held directly by Ms. Schwartz. The aggregate number of Ms. Schwartz’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 Letters

On March 9, 2026 Mr. Kaz Nejatian, our Chief Executive Officer and Director, entered into a 10b5-1 Instruction Letter (the “Nejatian Instructions”) with respect to all RSUs granted or to be granted to him under the Company’s equity plans or any successor plans, as well as all RSUs granted or to be granted to him which are not granted pursuant to any equity award plan, 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 Nejatian Instructions are intended to satisfy the affirmative defense of Rule 10b5-1(c). The aggregate number of shares to be sold under the Nejatian Instructions is not determinable and there is no set expiration date for the Nejatian Instructions.

On March 10, 2026 Mr. Lucas Matheson, our President, entered into a 10b5-1 Instruction Letter (the “Matheson Instructions”) with respect to all RSUs granted or to be granted to him 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 Matheson Instructions are intended to satisfy the affirmative defense of Rule 10b5-1(c). The aggregate number of shares to be sold under the Matheson Instructions is not determinable and there is no set expiration date for the Matheson Instructions.

On March 15, 2026 Ms. Giang LeGrice, our Chief Operating Officer, entered into a 10b5-1 Instruction Letter (the “LeGrice 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 LeGrice Instructions are intended to satisfy the affirmative defense of Rule 10b5-1(c). The aggregate number of shares to be sold under the LeGrice Instructions is not determinable and there is no set expiration date for the LeGrice Instructions.