Company: IONQ
Filing Date: 2025-09-18
Form Type: 8-K/A
Source: 0001193125-25-206731
Chunk: 3

Company: IonQ, Inc.
Filing Date: 2025-09-18
Form: 8-K/A
Chunk 3
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 customary closing conditions.2

#### Item 9.01Financial Statements and Exhibits.(d) ExhibitsExhibitNo.Description10.1Registration Rights Agreement, dated as of September 16, 2025, by and between IonQ, Inc. and Oxford Science Enterprises plc. (incorporated by reference)99.1Press Release announcing the closing of the Oxford Ionics Transaction, dated September 17, 2025. (incorporated by reference)99.2Press Release announcing the entry into the Vector Atomic Transaction, dated September 17, 2025. (incorporated by reference)104Cover Page Interactive Data File (embedded within the Inline XBRL document).3
SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

| Date: September 17, 2025 |     | IonQ, Inc. 
 By:        |     | /s/ Paul T. Dacier                          |
|:-------------------------|:----|:-----------|:----|:--------------------------------------------|
|                          |     |            |     | Paul T. Dacier                              |
|                          |     |            |     | Chief Legal Officer and Corporate Secretary |