Company: IONQ
Filing Date: 2025-10-10
Form Type: 424B5
Source: 0001193125-25-236452
Chunk: 53

Company: IonQ, Inc.
Filing Date: 2025-10-10
Form: 424B5
Chunk 53
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 securities under the registration statement of which this prospectus supplement forms a part is terminated or completed:

S-36

We will furnish without charge to each person to whom this prospectus supplement is delivered, upon written or oral request, a copy of any or all of the documents incorporated by reference, including exhibits to these documents. You can request a copy of these filings by writing or telephoning us at the following address or telephone number: IonQ, Inc. 4505 Campus Drive College Park, MD 20740 Attn: Investor Relations (301) 298-7997 The information accessible through any website referred to in this prospectus supplement or any document incorporated herein is not, and should not be deemed to be, a part of this prospectus supplement. S-37

PROSPECTUS

IonQ, Inc.

Common Stock

Preferred Stock

Debt Securities

Depositary Shares

Warrants

Subscription Rights

Purchase Contracts

Units

We may issue securities from time to time in one or more offerings, in amounts, at prices and on terms determined at the time of offering.
This prospectus describes the general terms of these securities and the general manner in which these securities will be offered. We will provide the specific terms of these securities in supplements to this prospectus, which will also describe the
specific manner in which these securities will be offered and may also supplement, update or amend information contained in this prospectus. You should read this prospectus and any applicable prospectus supplement before you invest.

In addition, the selling stockholders to be named in a supplement to this prospectus may from time to time offer or sell shares of our common
stock. To the extent that any 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”