PTT Oil and Retail Business Public Company Limited announced that Dr. Chaichana Mitrpant, the Independent Director, Chairman of the Enterprise Risk Management Committee and a Member of the Corporate Governance and Sustainability Committee notified the Company of his intention by submitting the letter of resignation to resign from all the position mentioned above, with effect from July 1, 2024 onwards. Therefore, the list of the Company's Board of Directors and the Sub-Committees of the Company as of July 1, 2024 are as follows: Mr. Somchai Lertsutiwong - Independent Director and Chairman of Director, Mr. Chintapun Dansubutra - Independent Director /Chairman of the Audit Committee and a Member of the Corporate Governance and Sustainability Committee, Prof. Dr. Bundhit Eua-arporn - Independent Director and Chairman of the Nomination and Remuneration Committee, Mr. Tawatchai Cheevanon - Independent Director /Chairman of the Corporate Governance and Sustainability Committee and a Member of the Nomination and Remuneration Committee, Prof. Dr. Parichart Sthapitanonda- Independent Director /a Member of the Audit Committee and a Member of the Corporate Governance and Sustainability Committee, Pol. Lt.

Gen. Jirabhop Bhuridej -Independent Director and a Member of the Enterprise Risk Management Committee, Mr. Supat Metheeworapote - Independent Director /a Member of the Audit Committee and a Member of the Nomination and Remuneration Committee, Mr. Theeraj Athanavanich - Director and a Member of the Nomination and Remuneration Committee, Miss Nantika Thangsuphanich - Director and a Member of the Corporate Governance and Sustainability Committee, Mr. Terdkiat Prommool - Director and a Member of the Nomination and Remuneration Committee, Mr. Chadil Chavanalikikorn - Director, Dr. Buranin Rattanasombat - Director and a Member of the Enterprise Risk Management Committee, Mr. Disathat Panyarachun -Director /Secretary to the Board and a Member of the Enterprise Risk Management Committee.