Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No ZIGA Mrs CHANTIRA LUESAKUL Disposition Stock 5.0013

Jarunun Asavadumrongchai Acquisition Stock 4.4857 6.262 10.7477 16/07/2021 4.4857 6.262 10.7477   246012192107-1 AEC Mr. Luchai Pukananan Disposition Stock 10.4711 6.262 4.2091 16/07/2021 10.4711 6.262

POST 019/2019 16 December 2019 Subject Notification convening date of the Extraordinary General Meeting of Shareholders No. 1/2020 To The President The Stock Exchange of Thailand 93 Ratchadaphisek

Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No GIFT Mr. Surachai Chetchotisak Disposition Stock

Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No PJW Mr. Kongsak Hemmontharop Disposition Stock 8.3263

Acquisition Convertible securities 3.072 8.661 11.733 13/12/2021 3.072 8.661 11.733   246015122112-1 RWI CAPITAL ENGINEERING NETWORK PUBLIC COMPANY LIMITED Disposition Stock 65.006 0.4194 64.5865 08/12/2021

Convertible securities 0 3.7404 3.7404 14/12/2022 0 3.7404 3.7404 The acquirer will make a tender offer. 246022152212-1 IND Doctor Chainarong Na lamphun Acquisition Stock 29.4114 1.1428 30.5542 14/12/2022

/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No THE Mrs Wanna Sittisirinukul Acquisition Stock 7.1683 5.4897 12.658 09/08/2024 7.1683 5.4897 12.658   246031142408-1 Stock: common

หุ้น 10.3776 10.3776 0 18/12/2562 10.3776 10.3776 0   246002021912-1 Stock: common stock or preferred stock or depository receipt (DR). Convertible Securities: warrant or convertible debenture or other

5.5995 8.7108 19/10/2564 14.3104 5.5995 8.7108   246014022110-1 Stock: common stock or preferred stock or depository receipt (DR). Convertible Securities: warrant or convertible debenture or other