X0202 SCHEDULE 13G/A 0000947871-25-000637 0001567031 XXXXXXXX LIVE 1 Common shares 04/14/2026 0000886977 Methanex Corporation 59151K108 200 Burrard Street, Suite 1800 Vancouver Z4 V6C 3M1 Rule 13d-1(c) OCI N.V. b P7 0.00 2612962.00 0.00 2612962.00 2612962.00 N 3.4 CO OCI Intermediate B.V. b P7 0.00 2612962.00 0.00 2612962.00 2612962.00 N 3.4 CO OCI Chemicals B.V. b P7 0.00 2612962.00 0.00 2612962.00 2612962.00 N 3.4 CO Methanex Corporation 200 Burrard Street, Suite 1800, Vancouver, British Columbia, V6C 3M1 OCI N.V. OCI Intermediate B.V. OCI Chemicals B.V. Honthorststraat 19, 1071 DC Amsterdam, The Netherlands Honthorststraat 19, 1071 DC Amsterdam, The Netherlands Honthorststraat 19, 1071 DC Amsterdam, The Netherlands The Netherlands The Netherlands The Netherlands Y 2,612,962 3.4% (assuming 77,339,520 common shares issued and outstanding as at March 9, 2026) 0 2,612,962 0 2,612,962 N Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Exhibit No. 99.1 Joint Filing Agreement (incorporated by reference to Exhibit 99.1 to the Schedule 13G filed by the Reporting Persons with the SEC on July 2, 2025 https://www.sec.gov/Archives/edgar/data/886977/000094787125000637/ss4995067_ex9901.htm). OCI N.V. /s/ Hassan Badrawi 04/15/2026 OCI Intermediate B.V. /s/ Maud de Vries 04/15/2026 /s/ Beshoy Guirguis 04/15/2026 OCI Chemicals B.V. /s/ Maud de Vries 04/15/2026 /s/ Beshoy Guirguis 04/15/2026