Company: IONQ
Filing Date: 2025-07-07
Form Type: 424B5
Source: 0001193125-25-155889
Chunk: 5

Company: IonQ, Inc.
Filing Date: 2025-07-07
Form: 424B5
Chunk 5
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2021, the Merger Sub was merged with and into Legacy IonQ with Legacy IonQ continuing as the surviving corporation following the merger, becoming a
wholly owned subsidiary of dMY, and the separate corporate existence of the Merger Sub ceased (the “Business Combination”). Following the closing of the Business Combination, dMY changed its name to IonQ, Inc., and Legacy IonQ changed its
name to IonQ Quantum, Inc.

Our principal executive offices are located at 4505 Campus Drive, College Park, MD 20740, and our telephone number is (301) 298-7997. Our corporate website address is https://ionq.com. Information contained on or accessible through our website is not a part of this prospectus, and the inclusion of our website address in this prospectus
supplement is an inactive textual reference only.

S-3

THE OFFERING

| Issuer | IonQ, Inc. |

| Common stock offered by us | 14,165,708 shares |

| Warrants offered by us | 36,042,530 Series A Warrants to purchase 36,042,530 shares of our common stock on or prior to the date that is seven years after the date such warrants are issued and 3,855,557 Pre-Funded Warrants to purchase 3,855,557 shares of our common stock    
 on or prior to the date that is seven years after the date such warrants are issued. Each Series A Warrant is exercisable for one share of our common stock at an initial exercise price of $99.88 per share of common stock. Each Pre-funded Warrant is 
 exercisable for one share of our common stock at an exercise price of $0.0001 per share of common stock. This prospectus supplement also relates to the offering of 39,898,087 shares of common stock issuable upon the exercise of the Warrants.        |

| Common stock to be outstanding after this offering | 283,881,920 shares (or 323,780,007 shares if the Warrants are exercised in full). |

| Use of proceeds | We estimate that our net proceeds from the sale of the securities in this offering, excluding the proceeds, if any, from the exercise of the Warrants, will be approximately $978.5 million, after deducting underwriting discounts and 
 estimated offering expenses.                                                                                                                                                                                                            |

| We currently intend to use the net proceeds from this offering for working capital and other general corporate purposes. Additionally,