subsidiaries Ref. PDI/BK-BS-008/2020 20th February 2020 Re: Management Discussion and Analysis (MD&A) For the year ended December 31, 2019 To: President The Stock Exchange of Thailand Padaeng Industry Public

ที่ กม Translation No. Gor.Mor. 42/2560 October 10, 2017 President The Stock Exchange of Thailand Dear Madam, Approval for Buying Land for Investment Purposes The Board Meeting of O.C.C. Public

securities of Glow Energy Public Company Limited, and the scheduling of Extraordinary General Meeting of Shareholders No. 1/2018 Attention: President Stock Exchange of Thailand Enclosure: Information

1/5 Ref. 4/2019 January 11, 2019 Subject : The acquisition of investment in Ramkhamhaeng Hospital PCL. To : Director and Manager The Stock Exchange of Thailand The Board of Directors Meeting

: The President The Stock Exchange of Thailand The Extraordinary Board of Directors’ meeting of Bangkok Airways Public Company Limited, (“Company” or “BA”) No. 1/2019 held on March 19, 2019 and the Board

Date : 23/02/2001 09:16:00 -Translation- 14 November 2017 Subject : Information Memorandum Concerning Acquisition of Assets Attention : President The Stock Exchange of Thailand Vanachai Group Public

Date : 23/02/2001 09:16:00 -Translation- 15 November 2017 Subject : Information Memorandum Concerning Acquisition of Assets (revised) Attention : President The Stock Exchange of Thailand Vanachai

right to attend the Meeting and still be omitted a dividend payment as schedule. Attention The President of the Stock Exchange of Thailand The Stock Exchange of Thailand Eastern Technical Engineering

Limited. To: The President, The Stock Exchange of Thailand Enclosure: Information Memorandum regarding to the Acquisition of Assets The Extraordinary General Meeting of WCI Holding Public Company Limited

T.K.S. TECHNOLOGIES 11 August 2020 Re: Management Discussion and Analysis for Quarter 2/2020 To: President The Stock Exchange of Thailand T.K.S. Technologies Public Company Limited (“TKS”) and its