Exchange of Thailand Enclosure Capital Increase Form (F 53-4) (amended) Following Hydrotek Public Company Limited (the “Company”)’s Board of Directors’ Meeting No. 10/2017 held on October 19, 2017 at 5.00 pm

the Connected Transaction and Scheduling of Extraordinary General Meeting of Shareholders No. 1/2017 Attention : The President of the Stock Exchange of Thailand Enclosure: Information Memorandum on the

into the Connected Transaction and Scheduling of Extraordinary General Meeting of Shareholders No. 1/2017 Attention : The President of the Stock Exchange of Thailand Enclosure: Information Memorandum on

the Information Memorandum on Asset Disposal, Transaction No. 2, and are attached hereto as Enclosure 3. Sincerely yours, (Mr. Peerapong Jaroon-ek) Director and Chief Executive Officer Authorized

Province of Planet Board Company Limited, which is a Subsidiary of the Company Attention President The Stock Exchange of Thailand Enclosure Information Memorandum on Acquisition of Assets of East Coast

Province of Planet Board Company Limited, which is a Subsidiary of the Company (Additional) Attention President The Stock Exchange of Thailand Enclosure Information Memorandum on Acquisition of Assets of

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

NCL SINGAPORE ขยายส่วนงานขนส่งแบบ LCL Shipment (Less than Container Load ท าให้มีรายได้และก าไรในสว่นงานดงักลา่วเพิ่มขึน้ สง่ผลให้ NCL SINGAPORE ก าไรสทุธิที่ดีขึน้จากปีก่อน มากถึงร้อยละ 222.59 บริษัท

for the period Vanachai Panel Industries Co., Ltd. uses services from Doctorwood Co., Ltd. for loading up and loading down of goods and container lifting. 29 May 2017 21,000,000 0.25% as at 31 Mar. 2017

19,332,000 0.264% as at 31 Mar. 2019 5. Vanachai Panel Industries Co., Ltd. uses the service from Doctorwood Co., Ltd. for loading up and loading down of goods and container lifting. 24 May 2019 30,000,000