Quantum Computing Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Check the appropriate box:

(Name of Registrant as Specified in its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

April 30, 2026

Dear Fellow Quantum Computing Stockholders:

We invite you to attend the 2026 Annual Meeting of Stockholders of Quantum Computing Inc. to be held at the Quantum Computing corporate offices located at 5 Marine View Plaza, Suite 214, Hoboken, NJ 07030 on June 24, 2026.

The Notice of the Annual Meeting and proxy statement accompanying this letter provide information concerning matters to be considered and acted upon at the meeting. Immediately following the meeting, a report on our operations will be presented, including a question-and-answer and discussion period. Our 2025 results are presented in detail in our Current Report on Form 8-K filed with the Securities and Exchange Commission on June 20, 2025.

Your vote is very important. We encourage you to read all of the important information in the proxy statement and vote your shares as soon as possible. Whether or not you plan to attend, you can be sure your shares are represented at the Annual Meeting by promptly submitting your proxy by the Internet, by telephone or, if you request a paper copy of the proxy materials and receive a proxy card, by mail.

On behalf of the Board of Directors, thank you for your continued confidence and investment in Quantum Computing.

Sincerely,

/s/ Yuping Huang

Yuping Huang

Chairman of the Board of Directors and Chief Executive Officer

5 Marine View Plaza, Suite 214

Hoboken, NJ 07030

Telephone: (703) 436-2161

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

to be held on June 24, 2026

To the Stockholders of Quantum Computing Inc.

The 2026 Annual Meeting of the Stockholders (the “Annual Meeting”) of Quantum Computing Inc., a Delaware corporation (the “Company”), will be held on June 24, 2026, at 10:00 a.m. local time at the Company’s offices at 5 Marine View Plaza, Suite 214, Hoboken, NJ 07030. The purpose of the meeting is to consider and act upon the following matters:

1. To elect six directors to serve until the next annual meeting of stockholders and until their respective successors shall have been duly elected and qualified (Proposal No. 1);

2. To approve, on a non-binding advisory basis, the compensation of the Company’s named executive officers as disclosed in the proxy statement with respect to the Annual Meeting (Proposal No. 2);

3. To ratify the selection of BPM LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026 (Proposal No. 3);

4. To approve an amendment to the Company’s Certificate of Incorporation to increase the number of authorized shares of common stock (Proposal No. 4);

5. To approve an amendment to the Company’s 2022 Equity and Incentive Plan (Proposal No. 5); and

6. To transact such other business as may properly come before the Annual Meeting or any adjournment or postponement thereof.

The foregoing items of business are more fully described in the proxy statement with respect to the Annual Meeting. Only stockholders of record of the Company’s common stock, par value $0.0001 per share, at the close of business on April 27, 2026, will be entitled to notice of, and to vote at, the Annual Meeting or any adjournment thereof.

All stockholders are cordially invited to attend the Annual Meeting. We are providing proxy material access to our stockholders via the Internet atwww.cleartrustonline.com/qubt. Please give the proxy materials your careful attention.

QUANTUM COMPUTING INC.

/s/ Yuping Huang

Yuping Huang

Chief Executive Officer

Hoboken, NJ