12 December 2017 Subject: Resolutions of Board of Directors Meeting No. 14/2017 Attention: President Stock Exchange of Thailand Enclosures: 1. Information Memorandum on Asset Disposal, Transaction No

(English Translation) Page 1 Date : 5 February 2018 Subject : Notification of the Board of Directors’ Resolution Concerning the Plan to Spin Off its Subsidiary and to List Shares on the Stock

annual general meeting of shareholders for the Year 2018 To : The President The Stock Exchange of Thailand Attachment : Information Memorandum about the Acquisition of Assets and Connected Transaction The

Connected Transaction and the Scheduling of the Extraordinary General Meeting of Shareholders No. 1/2019 Attention : The President of the Stock Exchange of Thailand Enclosure : Information Memorandum on

-Translation- Ref. No. PorBor. 029 / 2020 19 June 2020 Subject: Entering into Transaction of Disposing of Subsidiary’s Machines for the Debenture Debt repayment To: President The Stock Exchange of

investment on assets (Revision 2) Attention: Directors and Managers The Stock Exchange of Thailand Attachment: 1. Information on the investment on assets 2. F53-4 form 3. Details on the issuance of warrants to

intermediaries to proceed in the same direction in compliance with the Notification on Standard Conduct of Business with respect to communication with and providing services to clients in the following matters: (1

to proceed in the same direction in compliance with the Notification on Standard Conduct of Business with respect to communication with and providing services to clients in the following matters: (1

to proceed in the same direction in compliance with the Notification on Standard Conduct of Business with respect to communication with and providing services to clients in the following matters: (1

(Translation) February 27, 2019 Ref: SET-2019-003 Re: Management's Discussion and Analysis and operating results for the Year 2018 Attn. to: President The Stock Exchange of Thailand Filter Vision