Company: IONQ
Filing Date: 2025-08-11
Form Type: 424B7
Source: 0001193125-25-177997
Chunk: 23

Company: IonQ, Inc.
Filing Date: 2025-08-11
Form: 424B7
Chunk 23
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 the selling stockholder and (ii) 1,654 shares to which the                                                                                                                            
 selling stockholder is entitled pursuant to escrow arrangements. Hanna Byland, Chief Executive Officer, and Céline Bedu, Chief Operating Officer, acting together by delegation, have voting and dispositive power over the selling 
 stockholder’s shares. The selling stockholder’s principal address is W.A. de Vigier Stiftung, Untere Steingrubenstrasse 25, 4500 Solothurn, Switzerland.                                                                            |

S-15

PLAN OF DISTRIBUTION The selling stockholders and their permitted assignees and successors-in-interestmay, from time to time, sell any or all of their shares covered hereby on the principal trading market or any other stock exchange, market or trading facility on which the shares are traded or in private transactions. These sales may be at fixed prices, at prevailing market prices at the time of sale, at prices related to the prevailing market price, at varying prices determined at the time of sale, or at negotiated prices. The selling stockholders may use any one or more of the following methods when selling shares:

| • |     | ordinary brokerage transactions and transactions in which the broker-dealer solicits purchasers; |

| • |     | block trades in which the broker-dealer will attempt to sell the shares as agent but may position and resell a 
 portion of the block as principal to facilitate the transaction;                                               |

| • |     | purchases by a broker-dealer as principal and resale by the broker-dealer for its account; |

| • |     | an exchange distribution in accordance with the rules of the applicable exchange; |

| • |     | privately negotiated transactions; |

| • |     | in transactions through broker-dealers that agree with the selling stockholders to sell a specified number of 
 such shares at a stipulated price per share;                                                                  |

| • |     | a combination of any such methods of sale; or |

| • |     | any other method permitted pursuant to applicable law. |

A selling stockholder that is an entity may elect to make an in-kinddistribution of shares of common stock to its members, partners, stockholders or other equityholders pursuant to the registration statement of which this prospectus forms a part by delivering a prospectus. To the extent that such members, partners, stockholders or other equityholders are not affiliates of ours, such members, partners, stockholders or other equityholders would thereby receive freely tradable shares of common stock pursuant