MiNK Therapeutics, Inc.

Stockholder Proposals for 2025 Annual Meeting of Stockholders

Proposals to be included in the Company’s proxy statement. Under SEC rules, if a stockholder wants us to include a proposal in our proxy statement and form of proxy for presentation at our 2025 Annual Meeting of Stockholders, the proposal must comply with Rule 14a-8 under the 1934 Act and must also meet the advance notice requirements in our bylaws applicable to all stockholder proposals (as described in the following paragraphs).

Proposals to be brought before an annual meeting. Under our bylaws, a stockholder must follow certain procedures to nominate persons for election as directors or to introduce an item of business at an annual meeting of stockholders. Among other requirements, these procedures require any nomination or proposed item of business to be submitted in writing to our Chairman of the Board or Corporate Secretary at our principal executive offices. Assuming our 2025 Annual Meeting of Stockholders is not more than 30 days before or 30 days after June 12, 2025, if you wish to bring business before the 2025 Annual Meeting of Stockholders, you must give us written notice by December 30, 2024.

However, if at least 60 days’ notice or prior public disclosure of the date of the 2025 Annual Meeting of Stockholders is given or made and the date of the 2025 Annual Meeting of Stockholders is not within 30 days before or after June 12, 2025, notice by the stockholder must be received by the Company 45 days prior to the date of the 2025 Annual Meeting of Stockholders. If less than 60 days’ notice or prior public disclosure of the date of the 2025 Annual Meeting of Stockholders is given or made and the date of the 2025 Annual Meeting of Stockholders is not within 30 days before or after June 12, 2025, notice by the stockholder must be received by the Company no later than 15 days after the date MiNK sends notice of the 2025 Annual Meeting of Stockholders. If a stockholder fails to provide timely notice of a proposal to be presented at the 2025 Annual Meeting of Stockholders, the proxies designated by the Board will have discretionary authority to vote on the proposal.

In addition, stockholders who intend to solicit proxies in support of director nominees other than the Board's nominees must also provide written notice to our Chairman of the Board or Corporate Secretary that sets forth all the information required by Rule 14a-19 of the 1934 Act.

Householding of Meeting Materials

Some banks, brokers, and other nominee record holders may be participating in the practice of “householding” proxy statements and annual reports. This means that only one copy of our proxy statement or annual report may have been sent to multiple stockholders in your household. We will promptly provide a separate copy of either document to you if you contact Investor Relations at MiNK Therapeutics Inc., 149 Fifth Avenue, Suite 500, New York, NY 10010, or telephone or e-mail Investor Relations at 212-994-8250 orinvestor@minktherapeutics.com. If you want to receive separate copies of the annual report and proxy statement in the future or if you are receiving multiple copies and would like to receive only one copy for your household, you should contact your bank, broker or other nominee record holders, or you may contact us.

AN TO VIEW MATERIALS & VOTE VOTE BY INTERNET.www.proxyvote.com.scan the QR Barcode above use the internet to transmit your voting instructions and for electronic delivery of information vote by 11:50 P.M.ET on 04/01/2022 Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and so create an electronic voting instruction form. During the meeting- go towww.virtualshareholdermeeting.comINKT2022 you may attend the meeting via the internet and vote during the meeting. have the information that is printed in the box marked by the arrow available and follow the instructions. Vote by phone- 1-800-690-6903 use any touch tone telephone to transmit your voting instructions. vote by 11:59 P.M. ET on 06/07/2022. have your proxy card in hand when you call and then follow the instructions. vote by mail mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to vote processing c/o Broadridge, 51 Mercedes way, Edgewood, NY 11717. mink therapeutics, inc. 149 fifth avenue suite 500 new York, NY 10010 Investor Address Line 1 Investor Address Line 2 Investor Address Line 3 Investor Address Line 4 Investor Address Line 5 John Sample 1234 ANYWHERE STREET ANY CITY, ON A1A 1A1 CONTROL # 0000000000000000 SHARES 123,456,789.012.12345 123,456,789,012.12345 123,456,789,012. 12345 123,456

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