หนังสือแสดงการรับทราบความผิด 28 February 2018 Subject : Management Discussion and Analysis of the year ended 31 December 2017 Attn. : Director and Manager The Stock Exchange of Thailand Encls. : A

Ref. PDI/BK-BS-076/2018 7th November 2018 Re: Management Discussion and Analysis (MD&A) For the three-month and nine-month periods ended September 30, 2018 To: President The Stock Exchange of

บริษัท วนชัย กรุ๊ป จำกัด(มหาชน) -Translation- 26 September 2017 Subject : Disclosure of connected transaction by a subsidiary company To : President The Stock Exchange of Thailand Vanachai Group

บริษัท วนชัย กรุ๊ป จำกัด(มหาชน) -Translation- 25 June 2018 Subject : Disclosure of connected transaction by a subsidiary company To : President The Stock Exchange of Thailand Vanachai Group Public

บริษัท วนชัย กรุ๊ป จำกัด(มหาชน) -Translation- 28 September 2018 Subject : Disclosure of connected transaction by a subsidiary company To : President The Stock Exchange of Thailand Vanachai Group

บริษัท วนชัย กรุ๊ป จำกัด(มหาชน) -Translation- 27 December 2018 Subject : Disclosure of connected transaction by a subsidiary company To : President The Stock Exchange of Thailand Vanachai Group

YONG THAI PUBLIC COMPANY LIMITED 633/14 Sathupradit Road, Yannawa, Bangkok 10120 Thailand Tel. (662) 2943364-8, Fax : (662) 2943373 YTC 1/2019 February 28, 2019 To : The President The Stock Exchange

The Stock Exchange of Thailand Enclosures: 1. Information Memorandum on the Offering of Newly Issued Ordinary Shares to Specific Investors (Private Placement) at the Offering Price with a Discount of

Stock Exchange of Thailand Seamico Securities Public Company Limited and its subsidiaries (“The Company”) would like to report the consolidated operating result that has been audited by our auditor for

1 8 August 2019 Subject: Explanation of operating result in the financial statement ended 30 June 2019 To: President The Stock exchange of Thailand With reference to the financial statement of Q1