Definium Therapeutics, Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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SCHEDULE 14A

(RULE 14a-101)​

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No. )

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Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

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Preliminary Proxy Statement

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Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

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Definitive Proxy Statement

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Definitive Additional Materials

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Soliciting Material under §240.14a-12

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Mind Medicine (MindMed) Inc.

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(Name of Registrant as Specified In Its Charter)

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

Payment of Filing Fee (Check all boxes that apply):

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No fee required.

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Fee paid previously with preliminary materials.

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Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

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One World Trade Center, Suite 8500

New York, New York 10007

(212) 220-6633

NOTICE OF ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS

To be held on June 12, 2025 at 10:00 a.m. Eastern Time.

Dear Shareholder:

You are cordially invited to attend the Annual General and Special Meeting of Shareholders (the “Annual Meeting”) of Mind Medicine (MindMed) Inc. (the “Company” or “MindMed”), a British Columbia company. All shareholders are invited to attend the Annual Meeting, which will be held virtually via live webcast at www.virtualshareholdermeeting.com/MNMD2025 on June 12, 2025 at 10:00 a.m. Eastern Time. To participate, vote or submit questions during the Annual Meeting, shareholders or their proxyholders must log on to the virtual meeting platform by entering the 16-digit control number included on your proxy card, Notice of Internet Availability of Proxy Materials (“Notice”) or voting instruction form. Online access to the Annual Meeting will open approximately 15 minutes prior to the start of the virtual meeting.

The Annual Meeting and any or all adjournments or postponement thereof will be held for the following purposes:

(1)

To elect Carol A. Vallone, Andreas Krebs, Dr. Suzanne Bruhn, Dr. Roger Crystal, David Gryska and Robert Barrow to the Company’s board of directors (the “Board of Directors” or the “Board”) to hold office until the 2026 annual general meeting of shareholders (“Proposal No. 1”);

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(2)

To appoint KPMG LLP (“KPMG”) as independent registered public accounting firm (auditor) for the Company until the 2026 annual general meeting of shareholders (“Proposal No. 2”);

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(3)

To consider, and if deemed advisable, approve the Mind Medicine (MindMed) Inc. 2025 Equity Incentive Plan (the “2025 Equity Incentive Plan”), a copy of which is attached as Annex B to the proxy statement accompanying this Notice (“Proposal No. 3”); and

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(4)

To conduct any other business properly brought before the Annual Meeting and any adjournment or postponement thereof.

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These items of business are more fully described in the proxy statement accompanying this Notice of Annual General and Special Meeting of Shareholders. The Annual Meeting will be held in a virtual format to enable greater participation by shareholders. At the Annual Meeting, all shareholders, regardless of geographic location and equity ownership, will have an equal opportunity to participate. Please attend the Annual Meeting at www.virtualshareholdermeeting.com/MNMD2025. Audio can be accessed via a phone, tablet or computer.

The record date for the Annual Meeting is April 16, 2025 (the “Record Date”). Only shareholders of record as of the close of business on that date may vote at the Annual Meeting or any adjournment or postponement thereof.

You may vote by submitting your proxy via the Internet, by telephone, or by mail by following the instructions on the proxy card or Notice by June 11, 2025 at 11:59 p.m. Eastern Time. If you are a beneficial owner of shares registered in the name of your broker, bank or other nominee, you should have received a voting instruction form with these proxy materials from that organization rather than from MindMed. Simply complete and mail the voting instruction form in accordance with the instructions in that form to ensure that your vote is counted. Alternatively, you may vote by telephone or over the Internet by following the instructions provided by your broker, bank or other nominee. Beneficial owners should provide their voting instructions to their broker, bank or nominee sufficiently in advance of the Annual Meeting and in accordance with the voting instructions provided by their broker, bank or other nominee.

Although not part of the proxy statement accompanying this Notice of Annual General and Special Meeting of Shareholders, we are also making available our 2024 Annual Report on Form 10-K, which includes our financial statements prepared in accordance with U.S. GAAP for the fiscal year ended December 31, 2024 (the “Annual Report”). The proxy statement, the proxy card and the Annual Report are first being made available online to shareholders beginning on or about April 23, 2025.

Important Notice Regarding the Availability of Proxy Materials for the

Annual Meeting to be Held on June 12, 2025 at 10:00 a.m. Eastern Time:

The proxy statement, the proxy card and the Annual Report are available at: www.proxyvote.com

You may also request paper copies of materials by:

Completing a request atwww.proxyvote.com;

By telephone at 1-800-579-1639; or

By e-mailing sendmaterial@proxyvote.com and include 16-digit control number in the subject line.

By Order of the Board of Directors,

Chief Executive Officer

New York, New York

April 23, 2025