- Translation - CBG 009/2020 March 10, 2020 Subject: Re: Board of Directors’ resolutions to approve a joint venture investment and establishment of Subsidiary To: President The Stock Exchange of

rules until 25 December 2019. It is expected that the rules will be adopted early in 2020. 2.     Trading through secondary markets: SEC has discussed with the Stock Exchange of Thailand on the

-Translation- Ref. No. PorBor. 050 / 2019 December 27, 2019 Subject: Entering into Transaction of Acquisition of Associate Company’s ordinary shares To: President The Stock Exchange of Thailand

No. WHAUP-CS014-2562 1 8 August 2019 Re Share Acquisition in Duong River Surface Water Plant JSC in Vietnam Dear President The Stock Exchange of Thailand WHA Utilities and Power Public Company

M.D. 042/2020 February 12, 2020 Subject : Disclosure of the information connected transactions To : President of the Stock of Exchange of Thailand Kang Yong Electric Public Company Limited hereby

M.D. 042/2020 February 12, 2020 Subject : Disclosure of the information connected transactions (Revised) To : President of the Stock of Exchange of Thailand Kang Yong Electric Public Company Limited

(Discount) on Share Capital 724.76 724.76 724.76 724.76 Retained Earnings (Deficit) 2,707.01 2,361.18 2,254.43 2,172.07 Treasury Stock - - - - Shares Of The Company Held By Subsidiaries - - - - Other

Ref. PDI/BK-BS-064/2019 12th November 2019 Re: Management Discussion and Analysis (MD&A) For the three-month and nine-month periods ended September 30, 2019 To: President The Stock Exchange of

1 June 30, 2020 Subjects : The acquisition of ordinary shares of APEX Energy Co., Ltd. increased 18.75% Attention : The Director and Manager of the Stock Exchange of Thailand Eastern Power Group

write-off rate. 3.12 Provsion It shall disclose rules of recognition and valuation method of provision. 3.13 Treasury stock It shall disclose characteristics of each category of stock resold by the