-Translation- Ref. No. PorBor. 050 / 2019 December 27, 2019 Subject: Entering into Transaction of Acquisition of Associate Company’s ordinary shares To: President The Stock Exchange of Thailand

1 -Translation- Ref :IR 62/023 December 23, 2019 Subject: Change in Shareholding Structure of Subsidiary Company (edit) To: President, The Stock Exchange of Thailand T.K.S. Technologies Public

1 -Translation- Ref :IR 62/023 December 23, 2019 Subject: Change in Shareholding Structure of Subsidiary Company (edit no.2 ) To: President, The Stock Exchange of Thailand T.K.S. Technologies Public

"Dai a to" Top 10 Major Shareholders(@18 Mar 2022) Share % 1. นาย ล้ำพันธุ์ พรรธนประเทศ 155,900,000 38.02 2. นาย ดนุพล ชิลลี่ 19,976,800 4.87 3. บริษัท Thai NVDR Company Limited 16,106,826 3.93 4. บริษัท

companies' financial statements since some companies may restate the comparing financial statements on the latest financial statements. Top 10 Major Shareholders(@09 May 2022) Share % 1. นาย ขรรค์ชัย บุนปาน

Premium (Discount) on Share Capital 547.61 547.61 547.61 547.61 824.43 Retained Earnings (Deficit) -1,001.70 -967.94 -985.37 -881.59 -927.98 Treasury Stock - - - - - Shares Of The Company Held By

, geotechnical works, mining development, geological exploration and ore reserve evaluation. Top 10 Major Shareholders(@05 May 2022) Share % 1. MR. CHAWALIT TANOMTIN 179,235,800 16.29 2. น.ส. ชนาพร เบรย์

 / - / Companies Under Rehabilitation Top 10 Major Shareholders(@10 Mar 2022) Share % 1. รองศาสตราจารย์ ดร. จิรศักดิ์ จิยะจันทน์ 5,200,000,000 71.26 2. นาง แสงศรี จิยะจันทน์ 942,191,180 12.91 3. MR. KRITSADA TUNPOW

Share Capital - - - - - Retained Earnings (Deficit) 518.71 481.91 496.08 460.40 410.06 Treasury Stock - - - - - Shares Of The Company Held By Subsidiaries - - - - - Other Components Of Equity 253.56

1,000.00 1,000.00 Premium (Discount) on Share Capital 467.90 467.90 467.90 467.90 Retained Earnings (Deficit) 1,210.92 1,198.52 1,166.13 1,181.99 Treasury Stock - - - - Shares Of The Company Held By