1 -Translation- Ref :IR 62/023 December 23, 2019 Subject: Change in Shareholding Structure of Subsidiary Company To: President, The Stock Exchange of Thailand T.K.S. Technologies Public Company

Exchange Commission No. Kor Thor. 7/2539 Re: Shareholders’ Structure and Shareholding Proportion of a Limited Company or Public Limited Company Which Is Established to Undertake Securities Business in the

Exchange Commission No. Kor Thor. 7/2539 Re: Shareholders’ Structure and Shareholding Proportion of a Limited Company or Public Limited Company Which Is Established to Undertake Securities Business in the

Exchange Commission No. Kor Thor. 7/2539 Re: Shareholders’ Structure and Shareholding Proportion of a Limited Company or Public Limited Company Which Is Established to Undertake Securities Business in the

Exchange Commission No. Kor Jor. 20/2541 Re: Determination of an Additional Type of Securities _________________ By virtue of Section 4 and Section 14 of the Securities and Exchange Act B.E. 2535 (1992), the

Bangkok, July 26, 2016 ? The Criminal Fining Committee has imposed a fine of 500,000 baht on Mr. Sakorn  Suksriwong for soliciting a person to purchase shares of BFIT Securities Public Company

08 แจ้งการซื้อหุ้น DTC_E - Translation - No. 051/2018/022 9 May 2018 Subject: The purchase of shares in Dusit Thani Public Company Limited To: The President, The Stock Exchange of Thailand With

Plc. (TWZ). Following the Stock Exchange of Thailand (SET)?s report on irregular trading of TWZ shares, the SEC probed into the case and found that such irregular trading (1) from September 28 to

PLC (SALEE). With the referral from the Stock Exchange of Thailand on irregular trading of SALEE shares as a result of a group of persons? trading causing the changes of SALEE share price and trading

manipulating share price of Permsin Steel Works Plc. (PERM). With the referral from the Stock Exchange of Thailand on irregular trading of PERM shares by a group of persons, the SEC probed into the case and