Company: IONQ
Filing Date: 2025-08-28
Form Type: 424B7
Source: 0001193125-25-191228
Chunk: 18

Company: IonQ, Inc.
Filing Date: 2025-08-28
Form: 424B7
Chunk 18
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-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-kind distributionof 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 to a distribution pursuant to the registration statement of which this prospectus forms a part. The selling stockholders may also sell shares under Rule 144 or any other exemption from registration under the Securities Act, if available, rather than under this prospectus supplement. Broker-dealers engaged by the selling stockholders may arrange for other broker-dealers to participate in sales. Broker-dealers may receive commissions or discounts from the selling stockholders (or, if any broker-dealer acts as agent for the purchaser of shares, from the purchaser) in amounts to be negotiated, but, except as set forth in a prospectus supplement, in the case of an agency transaction not in excess of a customary brokerage commission in compliance with FINRA Rule 2121. We have agreed with the selling stockholders to keep the registration statement of which this prospectus supplement constitutes a part effective until the earliest to occur of (i) the date on which all of the shares of our common stock covered by this prospectus supplement have been sold, (ii) such time as each selling stockholder is eligible to sell all of such shares of our common stock under Rule 144 of the Securities Act without any limitation as to volume or manner of sale or (iii) the six-monthanniversary of the date of this prospectus supplement, subject to certain exceptions. We have agreed to indemnify the selling stockholders against certain liabilities in connection with the offering of the shares and will pay certain expenses of the registration of the shares offered hereby, including the SEC