Company: IONQ
Filing Date: 2025-10-10
Form Type: 424B5
Source: 0001193125-25-236448
Chunk: 24

Company: IonQ, Inc.
Filing Date: 2025-10-10
Form: 424B5
Chunk 24
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 a statutory short form merger or other transaction requiring other shareholders of ours to surrender their shares of common stock without approval of the
shareholders of ours; or (C) directly or indirectly, including through subsidiaries, affiliates or otherwise, in one or more related transactions, the issuance of or the entering into any other instrument or transaction structured in a

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manner to circumvent, or that circumvents, the intent of this definition in which case this definition shall
be construed and implemented in a manner otherwise than in strict conformity with the terms of this definition to the extent necessary to correct this definition or any portion of this definition which may be defective or inconsistent with the
intended treatment of such instrument or transaction.

No rights as a shareholder

Except as may otherwise be provided in a Warrant Agreement, the holder of a Warrant, solely in its capacity as holder of a Warrant, does not have the rights of
a holder of shares of common stock, including any voting rights, prior to the issuance to the holder of the warrant shares which it is then entitled to receive upon the due exercise of a Warrant.

Exchange listing

We do not plan to apply to list the
Warrants on the NYSE or any other national securities exchange or automated quotation system.

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UNDERWRITING We are offering the securities described in this prospectus supplement through J.P. Morgan Securities LLC as sole underwriter (the “underwriter”). We have entered into an underwriting agreement with the underwriter. Subject to the terms and conditions of the underwriting agreement, we have agreed to sell to the underwriter, and the underwriter has agreed to purchase, at the public offering price less the applicable underwriting discounts and commissions set forth on the cover page of this prospectus supplement, the number of shares of common stock, Pre-FundedWarrants and Series B Warrants listed next to its name in the following table:

| Name                       |     | Number    
 of shares |            |     | Number      
 of Series B 
 Warrants    |            |     | Number of 
 Pre-      
 Funded    
 Warrants  |           |
| J.P. Morgan Securities LLC |     |           | 16,500,000 |     |             | 43,010,800 |     |           | 5,005,400 |
| Total                      |     |           | 16,500,000 |     |             | 43,010,800 |     |           | 5,005,