Company: IONQ
Filing Date: 2025-02-28
Form Type: 8-K/A
Source: 0001193125-25-042604
Chunk: 1

Company: IonQ, Inc.
Filing Date: 2025-02-28
Form: 8-K/A
Chunk 1
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1933 (§ 230.405 of this chapter) or Rule 12b-2of the Securities Exchange Act of 1934 (§ 240.12b-2of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

This Current Report on Form 8-K/A(this “ Amendment”) amends the Current Report on Form 8-Kfiled by IonQ, Inc. (the “ Company”) with the U.S. Securities and Exchange Commission on February 26, 2025 (the “ Original Form 8-K”) filed to, among other things, report under Item 8.01 that the Company had entered into a definitive agreement to acquire a controlling stake of ID Quantique SA, a global leader in quantum networking and sensing, headquartered in Geneva, Switzerland, in an all-stocktransaction for up to approximately 5.2 million shares of common stock of the Company (the “ Transaction”). The purpose of this Amendment is to incorporate the information contained in Item 8.01 of the Original Form 8-Kunder Item 3.02 as well, to the extent required, and to provide supplemental information required by Item 3.02. Except as set forth herein, no other changes have been made to the Original Form 8-K,and Item 2.02, Item 5.02, Item 7.01, Item 8.01 and Item 9.01 of the Original Form 8-Kare incorporated herein by reference.

| Item 3.02 | Unregistered Sales of Equity Securities |

To the extent required by this Item 3.02, the information contained in Item 8.01 of the Original Form 8-Kis incorporated herein by reference. The shares of common stock issued at the closing of the Transaction will be restricted securities, and the issuance and sale of the shares will be exempt from registration under Section 4(a)(2) of the Securities Act of 1933, as amended, and/or Regulation D promulgated thereunder.

| Item 9.01 | Financial Statements and Exhibits. |

(d) Exhibits.

| ExhibitNo. |     | Description                                                                                                                                                                                                                                                                |
| 10.1*      |     | Offer Letter by and between the Company and Niccolo de Masi, dated February