หน้า 1 จาก 1 Translation August 13, 2019 Subject: Management explanation and analysis for Quarter ended 30 June 2019 Attn: The Managing Director, the Stock Exchange of Thailand Pacific Pipe Public

Ref Ref. 2S_BoD013/2019 August 14, 2019 Subject: Clarification of the change in operating result more than 20% To : The president The Stock Exchange of Thailand 2S Metal Public Company Limited (the

set-q1-61 (Translation) Ref.No.LEE 09/2018 May 14, 2018 Subject : Management Discussion and Analysis for the first quarter ended March 31, 2018 To : President of The Stock Exchange of Thailand We

หนา้ 1 จาก 1 Translation May 13, 2020 Subject: Management explanation and analysis for Year ended 31 March 2020 Attn: The Managing Director, the Stock Exchange of Thailand Pacific Pipe Public Company

Manager of The Stock Exchange of Thailand Union Petrochemical Public Company Limited and its subsidiaries ("the Company") would like to clarify the operating results for the Quarter1/2020 ended March 31

(Translation) LEE 12/2019 11 November 2019 Subject : Management Discussion and Analysis for the third quarter ended September 30, 2019 To : President of The Stock Exchange of Thailand We submit

หน้า 1 ของ 2 (Translation) No. ACC6702/001 February 28, 2024 Subject: Clarification of operating results for the Annual Year 2023 To: The President, The Stock Exchange of Thailand Advanced Connection

แบบแสดงรายการข้อมูลสำหรับการเสนอขายหลักทรัพย์ (แบบ 69-1) 1 No. WHAUP-CS029/2018 November 09, 2018 Attention: Managing Director – Stock Exchange of Thailand Subject: Report of Financial Results for

Analysis for the second quarter ended June 30, 2020 Attention The President The Stock Exchange of Thailand Attachment Report and interim financial statement for the second quarter ended June 30, 2020

Management Discussion and Analysis for the third quarter ended September 30, 2019 Attention The President The Stock Exchange of Thailand Attachment Report and interim financial statement for the third quarter