Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No EFORL Mrs. Pimpen Deephanphongs Disposition Stock

Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No QTC Mr. Litsamy Latsavong Disposition Stock 12.4599

Disposition Stock 5 0.0003 4.9997 02/12/2022 5 0.0003 4.9997   246022002212-1 WHA KASIKORN ASSET MANAGEMENT COMPANY LIMITED Acquisition Stock 4.9472 0.1776 5.1248 19/08/2022 4.9472 0.1776 5.1248   246020342208

Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No READY Mr. Supachoke Panchasarp Acquisition Stock 4.99

Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No MVP Mr. Sura Khanittaweekul Disposition Stock 15.9319

Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No JKN Mr. Jakkaphong Jakrajutatip Acquisition Stock

operating results for the 3-month period and 6-month period ending June 30, 2017 To : President The Stock Exchange of Thailand Diamond Building Products Public Company Limited and its Subsidiary (together

Ref. DBP. 141 / 2017 November 13, 2017 Subject : Clarification on Operating Results for the 3-Month Period and 9-Month Period ending September 30, 2017 To : President The Stock Exchange of Thailand

(THSI) list. This marks another step for us to be a world-class energy company with outstanding performance on environment, social and governance (ESG) aspects. We wish all stakeholders would continuously

Ref. DBP. 111 / 2020 August 10, 2020 Subject : Clarification on Operating Results for the 2nd quarter and 6-month period ending June 30, 2020 To : President The Stock Exchange of Thailand Diamond