Company: IONQ
Filing Date: 2025-02-27
Form Type: 424B5
Source: 0001193125-25-037295
Chunk: 13

Company: IonQ, Inc.
Filing Date: 2025-02-27
Form: 424B5
Chunk 13
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 on the actual public offering price, the actual number of shares that we offer in this offering, and other terms of this offering determined at the time of each offer and sale. The above discussion and table are based on 222,103,870 shares of our common stock outstanding as of December 31, 2024, and exclude:

| • |     | 16,687,129 shares of our common stock issuable upon the exercise of options outstanding as of December 31, 
 2024, at a weighted-average exercise price of $2.40 per share;                                             |

S-9

| • |     | 14,509,717 shares of our common stock issuable upon the vesting of restricted stock units outstanding as of 
 December 31, 2024;                                                                                          |

| • |     | 3,972,257 shares of our common stock issuable upon the vesting of performance-based restricted stock units 
 outstanding as of December 31, 2024;                                                                       |

| • |     | 2,320,696 shares of our common stock issuable upon the exercise of public warrants outstanding as of 
 December 31, 2024;                                                                                   |

| • |     | 543,152 shares of our common stock issuable upon the exercise of warrants held by a customer outstanding as of 
 December 31, 2024; and                                                                                         |

| • |     | 22,532,379 shares of our common stock reserved for issuance pursuant to future awards under our 2021 Equity                                                                                                                         
 Incentive Plan (the “2021 Plan”) as of December 31, 2024 and the automatic increase of 14,532,010 shares to the number of shares of common stock reserved for issuance under our 2021 Plan, which occurred on January 1, 2025, plus 
 any future increases in the number of shares of our common stock reserved for issuance under our 2021 Plan pursuant to provisions thereof that automatically increase the share reserve under the plan each year.                   |

To the extent that options outstanding as of December 31, 2024 have been or may be exercised, or other shares issued, investors purchasing our common stock in this offering may experience further dilution. In addition, we may choose to raise additional capital due to market conditions or strategic considerations even if we believe we have sufficient funds for our current or future operating plans. To the extent that additional capital is raised through the sale of equity or convertible debt securities,