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

Company: IonQ, Inc.
Filing Date: 2025-08-11
Form: 424B7
Chunk 25
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 shares may not
simultaneously engage in market making activities with respect to the shares, for the applicable restricted period, as defined in Regulation M, prior to the commencement of the distribution. In addition, the selling stockholders will be subject to
applicable provisions of the Exchange Act and the rules and regulations thereunder, including Regulation M, which may limit the timing of purchases and sales of the shares by the selling stockholders or any other person. We will make copies of this
prospectus supplement and related prospectus available to the selling stockholders and have informed them of the need to deliver a copy of this prospectus supplement and related prospectus to each purchaser at or prior to the time of the sale
(including by compliance with Rule 172 under the Securities Act).

The aggregate proceeds to the selling stockholders from the sale of the
shares offered by them will be the purchase price of the shares less discounts or commissions, if any. Each of the selling stockholders reserves the right to accept and, together with its agents from time to time, to reject, in whole or in part, any
proposed purchase of the shares to be made directly or through agents. We will not receive any of the proceeds from this offering.

S-17

LEGAL MATTERS

The validity of the shares of our common stock offered by this prospectus supplement will be passed upon for us by Paul, Weiss, Rifkind,
Wharton & Garrison LLP, New York, New York.

S-18

EXPERTS

The consolidated financial statements of IonQ, Inc. appearing in IonQ, Inc.’s Annual Report (Form
10-K) for the year ended December 31, 2024, and the effectiveness of IonQ, Inc.’s internal control over financial reporting as of December 31, 2024, have been audited by Ernst & Young
LLP, independent registered public accounting firm, as set forth in their reports thereon, included therein, and incorporated herein by reference. Such consolidated financial statements are incorporated herein by reference in reliance upon such
reports given on the authority of such firm as experts in accounting and auditing.

S-19

WHERE YOU CAN FIND MORE INFORMATION

We file annual, quarterly and current reports, proxy statements and other information with the SEC. Our SEC filings are available to the
public over the Internet at the SEC’s website at www.sec.gov. Copies of certain information filed by us with the SEC are also available on our website at https://ionq.com. Information accessible