Company: IONQ
Filing Date: 2025-02-28
Form Type: 8-K/A
Source: 0001193125-25-042604
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Company: IonQ, Inc.
Filing Date: 2025-02-28
Form: 8-K/A
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K /A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 28, 2025 ( February 25, 2025) IonQ, Inc. (Exact name of Registrant as Specified in Its Charter)

| Delaware                     |     | 001-39694              |     | 85-2992192         |
| (State or Other Jurisdiction 
 of Incorporation)            |     | -CommissionFile Number |     | -IRS Employer      
 Identification No. |

| 4505 Campus DriveCollege Park, Maryland  |     |     20740 |
| (Address of Principal Executive Offices) |     | -Zip Code |

Registrant’s Telephone Number, Including Area Code: 301 298-7997 Not Applicable (Former Name or Former Address, if Changed Since Last Report) Check the appropriate box below if the Form 8-Kfiling is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

| ☐ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |

| ☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |

| ☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |

| ☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) |

Securities registered pursuant to Section 12(b) of the Act:

| Title of each class                                                           |     | Trading   
 Symbol(s) |     | Name of each exchange   
 on which registered     |
| Common stock, par value $0.0001 per share                                     |     | IONQ      |     | New York Stock Exchange |
| Warrants, each exercisable for one share of common stock for $11.50 per share |     | IONQ WS   |     | New York Stock Exchange |

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of