SEC Form DEFA14A filed by MultiSensor AI Holdings Inc.

Filed by Registrant ☒

Filed by a Party other than the Registrant ☐

2026 You May Vote Your Proxy When You View The Material On The Internet. You Will Be Asked To Follow The Prompts To Vote Your Shares. MultiSensor AI Holdings, Inc. 24 Greenway Plaza, Suite 1800 Houston, TX 77046 NOTICE OF ANNUAL MEETING OF SHAREHOLDERS to be held on Friday, June 12, 2026 at 10:00 AM CT *Shareholders are cordially invited to attend the Annual Meeting and vote in person. At the meeting, you will need to request a ballot to vote your shares. Dear Shareholder, The 2026 Annual Meeting of Shareholders of MultiSensor AI Holdings, Inc. will be held at the offi ces of Haynes and Boone, LLP at 1221 McKinney St. #4000, Houston, TX 77010 on Friday, June 12, 2026, at 10:00 AM (local time). Proposals to be considered at the Annual Meeting: 1. To elect Margaret Chu, Stuart V. Flavin III, Daniel Friedberg, David Gow and Petros Kitsos as directors to hold offi ce until the Company’s annual meeting of stockholders to be held in 2027 and until their respective successors have been duly elected and qualifi ed; 2. To ratify the appointment of Weaver and Tidwell L.L.P. as the Company’s independent registered public accounting fi rm for the fi scal year ending December 31, 2026; 3. To approve an amendment to the Company’s 2023 Incentive Award Plan to increase the number of shares of common stock reserved for issuance pursuant to awards; and 4. To transact such other business as may properly come before the Annual Meeting or any continuation(s), postponement(s) or adjournment(s) thereof. The Board of Directors recommends a vote “FOR” all nominees under Proposal 1, and “FOR” Proposals 2 and 3. Your electronic vote authorizes the named proxies to vote your shares in the same manner as if you marked, signed, dated, and returned the proxy card. Vote Your Proxy on the Internet: Go to http://www.cstproxyvote.com Have your notice available when you access the above website. Follow the prompts to vote your shares. The Proxy Materials are available for review at: https://www.cstproxy.com/multisensorai/2026 CONTROL NUMBER MultiSensor AI Holdings, Inc. c/o Continental Proxy Services 1 State Street, New York NY 10004

2026 MULTISENSOR AI HOLDINGS, INC. 24 Greenway Plaza, Suite 1800 Houston, TX 77046 Important Notice Regarding the Availability of Proxy Materials For the 2026 Annual Meeting of Shareholders to be held on June 12, 2026. The following Proxy Materials are available to you to review at: https://www.cstproxy.com/multisensorai/2026 - The Company’s Annual Report for the year ended December 31, 2025. - The Company’s 2026 Proxy Statement. - The Proxy Card. - Any amendments to the foregoing materials that are required to be furnished to shareholders. This is not a ballot. You cannot use this notice to vote your shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. If you would like to receive a paper or e-mail copy of these documents, you must request one. There is no charge for such documents to be mailed to you. Please make your request for a copy as instructed below on or before May 29, 2026 to facilitate a timely delivery. You may also request that you receive paper copies of all future proxy materials from the Company. ACCESSING YOUR PROXY MATERIALS ONLINE Have this notice available when you request a paper copy of the proxy materials or to vote your proxy electronically. You must reference your Control number. REQUESTING A PAPER COPY OF THE PROXY MATERIALS By telephone please call 1-888-266-6791, or By logging on to https://www.cstproxy.com/multisensorai/2026 or By email at: proxy@continentalstock.com Please include the company name and your control number in the subject line.