144 0001567031 XXXXXXXX LIVE 0000886977 METHANEX CORP 000-20115 1800 Waterfront Centre 200 Burrard Street VANCOUVER A1 V6C 3M1 604-661-2600 OCI N.V., OCI Chemicals B.V. Shareholder Common Shares Citigroup Global Markets Inc.

388 Greenwich Street New York NY 10013

2000000 119740000.00 77339520 04/13/2026 Nasdaq Common Shares 06/27/2025 Transaction Consideration Issuer N 9944308 06/27/2025 Transaction Consideration N OCI Chemicals B.V.

Honthorststraat 19 Amsterdam P7 1071 DC

Common Shares 03/13/2026 3331346 172563722.80 OCI Chemicals B.V.

Honthorststraat 19 Amsterdam P7 1071 DC

Common Shares 04/09/2026 2000000 115300000.00 OCI Chemicals B.V., an indirect wholly-owned subsidiary of OCI N.V., holds the common shares to be sold. The common shares were acquired as part of the transaction consideration in the sale of OCI's global methanol business to Methanex Corporation. 04/13/2026 /s/ Beshoy Guirguis, Chief Financial Officer