The Board of Directors' Meeting No. 346 of Diamond Building Products Public Company Limited ("Company"), dated January 25, 2021, has resolved to approve the following changes in the Company's management structure and appointments of new Company's executives. The appointments of new Company's executives are as follows: Mr. Krit Kullertprasert as Assistant Chief Executive Officer Central Management; Mr. Kamchub Vatanatham as Division Manager (Senior); Mr. Somkuan Sittichoketum as Division Manager (Senior); Mr. Seree Saengmark as Division Manager (Senior); Mr. Songkran Suwanmak as Division Manager (Senior).