on the Transaction to the Stock Exchange of Thailand (the “SET”) and send the circular notice to the shareholders of the Company within 21 days from the date that such information has been disclosed to

regulations: Clause 1 In this Notification: (1) the term “company,” “parent company,” “subsidiary company,” “major shareholder,” and “controlling person” shall mutatis mutandis have the same meaning as defined

: Clause 1 In this Notification: (1) the term “company,” “parent company,” “subsidiary company,” “major shareholder,” and “controlling person” shall mutatis mutandis have the same meaning as defined in the

Information Memorandum regarding the Acquisition of Assets (List 2) of Master Ad Public Company Limited The acquisition of ordinary shares in Gold Star Group Company limited (“GSG”) and The

., and Schedule for the EGM of Shareholders No. 1/2019 (Revised3) To: The President The Stock Exchange of Thailand Enclosure: 1. Information Memorandum of Hydrotek Public Company Limited on Disposal of

under various potential sales reduction scenarios. The Company expanded a short-term credit line and a short-term loan was drawn down during the first quarter to meet payment obligations. In the second

., and Schedule for the EGM of Shareholders No. 1/2019 (Revised) To: The President The Stock Exchange of Thailand Enclosure: 1. Information Memorandum of Hydrotek Public Company Limited on Disposal of

., and Schedule for the EGM of Shareholders No. 1/2019 (Revised2) To: The President The Stock Exchange of Thailand Enclosure: 1. Information Memorandum of Hydrotek Public Company Limited on Disposal of

- 1 - AIT (VP-SEC) 004E/2020 February 11, 2021 Subject: Management's Discussion and Analysis of Operating Results for the year 2020 and Q4-2020 To: The President of the Stock Exchange of Thailand

on the Stock Exchange of Thailand’s Thailand Sustainability Index (SETTHSI Index) while the Company’s corporate governance practice is also in line with 5-stars ranking Performance Summary Consolidated