MCOT : Appointment of Acting President

MCOT Public Company Limited

63/1 Rama IX Road, Huaykwang

Bangkok 10310 Thailand

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Ref: MCOT/ 6154/1628

August 16, 2022

The Stock Exchange of Thailand

Attn: The President

Re: Appointment of Acting President

Dear Sir,

The Board of Directors of MCOT Public Company Limited (MCOT) at the meeting no. 12/2022 held on August 16, 2022 at meeting room 601, 6th Floor, Administration Building 1, MCOT Public Company Limited, 63/1 Rama IX Road, Huay Kwang District, Bangkok 10310 resolves to appoint Mr. Sirote Ratanamahatana, Director, as Acting President to replace Assoc. Prof. Kasemsarn Chotchakornpant, who resigns prior to completion of his term, effective September 1, 2022. Mr. Sirote Ratanamahatana.will also serve as Director until completion of directorship term.

Sincerely yours,

(Mr. Pornchit Piamsri)

Vice President, Corporate Secretary Department MCOT Public Company Limited

Authorized to sign on behalf of the company

Corporate Secretary Department

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At MCOT, we all work together towards a common goal of promoting transparency

and anti-corruption to achieve sustainable development.

MCOT has adopted an anti-corruption policy against all forms of corruption, which applies to any action taken by MCOT employees.

For more information, please visit www.mcot.net/ir> good governance >corporate governance>anti-corruption policy.