Company: IONQ
Filing Date: 2025-11-10
Form Type: 424B7
Source: 0000950142-25-002919
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Company: IonQ, Inc.
Filing Date: 2025-11-10
Form: 424B7
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Filed Pursuant to Rule 424(b)(7)
Registration No. 333-285279

PROSPECTUS SUPPLEMENT
(To Prospectus dated February 26, 2025)

<div align='center'>Up to 2,108,993 Shares

Common Stock</div>

This prospectus supplement relates to the
resale from time to time by the selling stockholder referenced in this prospectus supplement (the “selling stockholder”)
of up to 2,108,993 shares of common stock, par value $0.0001 per share (the “common stock”), of IonQ, Inc.
(“IonQ,” “we,” “our” and “us”). We will not receive any proceeds from the sale of
the shares of our common stock offered by this prospectus supplement.

The selling stockholder may sell the shares
on any national securities exchange on which the shares may be listed at the time of sale, on the over-the-counter market, in one or more
transactions otherwise than on these exchanges, such as privately negotiated transactions, or using a combination of these methods, and
at fixed prices, at prevailing market prices at the time of the sale, at varying prices determined at the time of sale, or at negotiated
prices. See “Plan of Distribution” beginning on page S-10 of this prospectus supplement for more information about how the
selling stockholder may sell or otherwise dispose of its shares using this prospectus supplement.

The selling stockholder may sell any, all or
none of the shares offered by this prospectus supplement and we do not know if, when or in what amounts the selling stockholder may sell
its shares hereunder.

Our common stock is listed on the New York
Stock Exchange (the “NYSE”) under the symbol “IONQ.” On November 7, 2025, the last sale price of our common stock
as reported on the NYSE was $59.27 per share.

<div align='center'>_______________</div>

Investing in our common stock involves risks. You should read carefully this prospectus supplement, the accompanying prospectus, and the documents incorporated by reference in this prospectus supplement and the accompanying prospectus before you invest. See “ Risk Factors” beginning on page S-4 of this prospectus supplement, page 4 of the accompanying prospectus and “Item 1A—Risk Factors” of our most recent annual report on Form 10-K and quarterly reports on Form 10-Q that are incorporated