Disciplinary action against member company

The Stock Exchange of Thailand ("SET") conducted an operational inspection of PI Securities Public Company Limited ("the Company") during July - August 2025 and found that the Company had insufficient internal control systems to ensure that the Company's operations complied with the regulations prescribed by SET in three areas, which are: (1) the inclusion of delisted securities in the collateral calculation for securities trading in cash, (2) the compliance with criteria related to the rules governing securities trading of a company having connection with the member, and (3) the failure to file an application for revocation of the registration of the authorized officer within the period of time prescribed. SET has considered and concluded that the Company's actions constituted a violation of or non-compliance with Clause 17 (1) and (12) of the SET Regulations Re: Membership Rules, B.E. 2544 (2001), in conjunction with Clause 5/1 paragraph three of the SET Regulations Re: Rules and Procedures Relating to Securities Trading in Cash, Clause 91 of the SET Notification Re: Procedures on Trading, Clearing and Settlement of Securities in the Exchange, B.E. 2560 (2017), and Clause 18 paragraph two (1) of the SET Notification Re: Persons Involved in the Trading System, B.E. 2555 (2012). However, the Company's violation of the aforementioned regulations had no impact on investors and the overall trading system. Therefore, SET by the Disciplinary Sub-Committee, has resolved to take disciplinary action against the Company for the aforementioned offenses by imposing a one-year probation period on the Company, effective from 1 December 2025. Furthermore, SET has reported the details of this disciplinary action against the Company to the Securities and Exchange Commission for its consideration and further action within its authority. Regulations and Disciplinary Enforcement Department 19 December 2025 ______________________________________________________________________