Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): o 1800 - 200 Burrard St.

Vancouver, BC Canada V6C 3M1

Investor Relations: 604-661-2600

Toll-Free: 1-800-661-8851

http://www.methanex.com

November 18, 2025

VANCOUVER, BRITISH COLUMBIA (November 18, 2025) - Methanex Corporation (the “Company” or “Methanex”) (TSX:MX) (NASDAQ:MEOH) announced today that its Board of Directors has declared a quarterly dividend of US$0.185 per share. The dividend will be payable on December 31, 2025, to holders of common shares of record on December 17, 2025.

Methanex is a Vancouver-based, publicly traded company and is the world's largest supplier of methanol globally. Methanex shares are listed for trading on the Toronto Stock Exchange in Canada under the trading symbol "MX" and on the NASDAQ Global Select Market in the United States under the trading symbol "MEOH". Methanex can be visited online at www.methanex.com.

- end -

Investor Relations

604-661-2600 or Toll Free: 1-800-661-8851

www.methanex.com

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.