IonQ, Inc.

Securities Trading Plans of Directors and Executive Officers

None of the Company’s directors or officers adopted, modified or terminated a Rule 10b5-1 trading arrangement or a non-Rule 10b5-1 trading arrangement during the three months ended September 30, 2025, as such terms are defined under Item 408(a) of Regulation S-K, except as follows:

On August 21, 2025, Rima Alameddine, our Chief Revenue Officer, modified a Rule 10b5-1 trading arrangement previously entered into on March 14, 2025. As so modified, the arrangement provides for the potential sale of up to 239,280 sharesof our common stock, subject to certain conditions, and has anexpiration date of November 27, 2026. Sales under the modified trading arrangement will not commence until completion of the required cooling off period under Rule 10b5-1.

On September 11, 2025, Kathryn Chou, one of ourdirectors, adopted a Rule 10b5-1 trading arrangement for the potential sale of up to 27,757 shares of our common stock, subject to certain conditions. The arrangement’sexpiration date is December 18, 2026. Sales under the trading arrangement will not commence until completion of the required cooling off period under Rule 10b5-1.

On September 11, 2025, Gabrielle Toledano, one of ourdirectors, adopted a Rule 10b5-1 trading arrangement for the potential sale of up to 3,373 shares of our common stock, subject to certain conditions. The arrangement’sexpiration date is November 27, 2026. Sales under the trading arrangement will not commence until completion of the required cooling off period under Rule 10b5-1.