Company: IONQ
Filing Date: 2025-08-11
Form Type: 424B7
Source: 0001193125-25-177997
Chunk: 2

Company: IonQ, Inc.
Filing Date: 2025-08-11
Form: 424B7
Chunk 2
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 so or to any person to whom it is unlawful to make such offer or solicitation.
You should not assume that the information in this prospectus supplement, the accompanying prospectus or any document incorporated by reference is accurate as of any date other than the dates of the respective documents. Our business, financial
condition, results of operations and prospects may have changed since that date.

The selling stockholders are not making an offer to sell
shares of our common stock in any jurisdiction where the offer or sale is not permitted. Neither this prospectus supplement nor the accompanying prospectus constitute, and may not be used in connection with, an offer to sell, or a solicitation of an
offer to buy, any securities offered by this prospectus supplement by any person in any jurisdiction in which it is unlawful for such person to make such an offer or solicitation. You must comply with all applicable laws and regulations in force in
any applicable jurisdiction and you must obtain any consent, approval or permission required by you for the purchase, offer or sale of shares of our common stock under the laws and regulations in force in the jurisdiction to which you are subject or
in which you make your purchase, offer or sale, and neither we nor the selling stockholders will have any responsibility therefor.

S-ii

PROSPECTUS SUPPLEMENT SUMMARY

This summary highlights selected information that is presented in greater detail elsewhere, or incorporated by reference, in this prospectus supplement, in the accompanying prospectus and in the documents incorporated by reference herein or therein. It does not contain all of the information that may be important to you and your investment decision. Before investing in our common stock, you should carefully read this entire prospectus supplement, the accompanying prospectus and the documents incorporated by reference herein or therein, including the matters set forth in the section titled “Risk Factors” and the consolidated financial statements and related notes and other information that we incorporate by reference herein, including our Annual Report on Form 10-Kand our Quarterly Reports on Form 10-Q.Unless the context indicates otherwise, references in this prospectus supplement to “IonQ,” “we,” “our” and “us” refer, collectively, to IonQ, Inc., a Delaware corporation, and its subsidiaries taken as a whole.

Overview

We are developing quantum computers and networks designed to solve some of the world’s most complex problems, and transform business,
society and the planet for the better. We believe that our proprietary technology, our architecture, and the technology exclusively available to us through license agreements