Subject Notification of disposal of shares in the subsidiary (revised subject and additional content) To The President of The Stock Exchange of Thailand The Meeting of the Board of Director Meeting of

Subsidiary’s Machines for the Debenture Debt repayment To: President The Stock Exchange of Thailand Reference: Letter of Rich Asia Corporation Public Co., Ltd. No. PorBor. 001/2020 dated January 6, 2020 and

-4124 MMS-AC63/039 August 7, 2020 Subject: Management Discussion and Analysis of Operating Results for 2Q20 ending June 30, 2020 To: The President Stock Exchange of Thailand Matching Maximize Solution

(Translated) August 11, 2020 Ref FSS 120/2020 Subject: Clarification of Company’s Operating Result for the six-month period ended June 30, 2020 To The President and Director The Stock Exchange of

and Managers, The Stock Exchange of Thailand The Board of Directors’ Meeting of Halcyon Technology PLC. (the “Company”) had passed the resolution to convene the 2020 Annual General Meeting of

-9320 Ref: PLC 2020/008 April 7, 2020 Subject: Postponement of the 2020 Annual General Meeting of Shareholders ("AGM") and Notice of interim dividend agenda consideration To: The President of the Stock

Provincial Waterworks Authority Attention: Directors and Managers The Stock Exchange of Thailand CC: Secretary-General of the Office of the Securities and Exchange Commission, Thailand Attachment: Map of the

-9320 Ref: PLC 2020/010 April 20, 2020 Subject: Payment of Interim Dividend and Schedule of the 2020 Annual General Meeting of Shareholders To: The President of the Stock Exchange of Thailand Panjawattana

(Translated) May 12, 2020 Ref FSS 080/2020 Subject: Clarification of Company’s Operating Result for the three-month period ended March 31, 2020 To The President and Director The Stock Exchange of

19 September 2005 - Translate – Ref. HF 0051/2020 May 18th, 2020. Subject : Disclosure of Connected Transaction Attn : Managing Director of the Stock Exchange of Thailand. According to the resolution