The board of directors of Siam Technic Concrete Public Company Limited at its meeting held on 12 May 2023, has approved the establishment of new subsidiary company as follow, in order to increase efficiency and agility of marketing strategies. Company's Name: Siam Steel Wire Trading Company Limited; Business Type: Distributor steel wire; Registered Capital: THB 1,000,000 - Consisted of 10,000 ordinary shares With a par value of THB 100 each; Source of Fund: The Company's working capital; Expected Benefits: Business and Market expansion to increase more revenue; Connected Nature: This transaction is not a connected transaction in accordance with the Notification of the Capital Market Supervisory Board No. TorJor.21/2551; Size of Transaction: The calculated transaction size does not cause the Company to fail within the disclosure requirement under the Notification of the Capital Market Supervisory Board No.

TorJor.20/2551.