Company: IONQ
Filing Date: 2025-07-07
Form Type: 424B5
Source: 0001193125-25-155889
Chunk: 54

Company: IonQ, Inc.
Filing Date: 2025-07-07
Form: 424B5
Chunk 54
---
 selling stockholders resell any securities, the selling stockholders may be required to provide you with this prospectus and a prospectus supplement identifying and containing specific information about the selling
stockholders and the amount and terms of the securities being offered. We will not receive any proceeds from the sale of our common stock by the selling stockholders.

The securities may be sold directly to you, through agents or through underwriters and dealers. If agents, underwriters or dealers are used to
sell the securities, we will name them and describe their compensation in a prospectus supplement. The price to the public of those securities and the net proceeds we expect to receive from that sale will also be set forth in a prospectus
supplement.

Our common stock and public warrants are listed on the New York Stock Exchange under the symbols “IONQ” and
“IONQ.WS,” respectively. Each prospectus supplement will indicate whether the securities offered thereby will be listed on any securities exchange.

Investing in our securities involves risks. Please carefully read the information under the headings “ Risk Factors” beginning on page 4 of this prospectus and “Item 1A – Risk Factors” of our most recent report on Form 10-Kor 10-Qthat is incorporated by reference in this prospectus before you invest in our securities.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus is February 26, 2025.

TABLE OF CONTENTS Page

| About this Prospectus               |     | ii |
| Prospectus Summary                  |     |  1 |
| Risk Factors                        |     |  4 |
| Forward-Looking                     
 Statements                          |     |  5 |
| Use of Proceeds                     |     |  6 |
| Selling Stockholders                |     |  7 |
| Description of Capital Stock        |     |  8 |
| Description of Debt Securities      |     |  9 |
| Description of Depositary Shares    |     | 17 |
| Description of Warrants             |     | 20 |
| Description of Subscription Rights  |     | 21 |
| Description of Purchase Contracts   |     | 22 |
| Description of Units                |     | 23 |
| Plan of Distribution                |     | 24 |
| Legal Matters                       |     | 27 |
| Experts