SEC Thailand is a recipient of Digital Government Awards 2020 and Honorable Mention of the 9th NACC Integrity Awards 2019 Unofficial Translation 14 June 2021 Attn: President of the Association of

- No. LMJG/SET/2020/019 August 10th, 2020 Subject: Clarification for the change of Operating Results more than 20% Attention: The President The Stock Exchange of Thailand Effects of the COVID-19

จดหมายชี้แจงQ160e May 15, 2017 The Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 31 March 2017 Summary of the 1 st Quarter

Letter_StockExchange_Nov14 November 14, 2019 The Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 30 September 2019 Summary on

จดหมายชี้แจงปี61e February 27, 2019 The Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis Ending 31 December 2018 Summary of operating result between 2018

May 13, 2019 SET-19-AC-002 Dear The President The Stock Exchange of Thailand Subject: Clarification of Result’s Operation for the three months ended March 31, 2019 According to the resolution of

จดหมายชี้แจงQ161e May 14, 2018 The Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 31 March 2018 Summary of the 1 st Quarter

the Board of Directors’ meeting for connected transaction and Schedule date for the Extraordinary General Meeting of Shareholders No. 1/2016 To: The President, The Stocks Exchange of Thailand The Board

% Laemchabang Industrial Estate 53,272 58,453 9.7% 53,225 58,453 9.8% Steam sales to IU - Thailand 123,241 132,087 7.2% 128,259 132,087 3.0% ABBREVIATION & OUR PROJECTSEXECUTIVE SUMMARY FINANCIAL PERFORMANCE

Samutprakarn, Samutprakarn 10280, Thailand Tel. 66 2323 1085..96 Fax. 66 2323 9283 (Translation) August 10, 2017 Subject: Management Discussion and Analysis (MD&A) of Q2/2017 To: Director and manager The Stock