List of securities which has triggered the Market Surveillance Measures

List of securities which has triggered the Market Surveillance Measures Level 1 : Excluded from Credit Limit and Cash Balance Security Symbol Start date End date DERIVATIVE PUT WARRANTS ON DELTA ELECTRONICS (THAILAND) PUBLIC COMPANY LIMITED ISSUED BY BUALUANG SECURITIES PUBLIC CO.,LTD. LAST TRADING IN MAY 2026 # A DELTA01P2605A 29-December-2025 30-December-2025 Extended Period - - - - Level 2 : Prohibit Net settlement, Excluded from credit limit, Cash Balance and Auction Security Symbol Start date End date - - - - Extended Period - - - - Level 3 : A One-day Suspension of Trading, followed by Prohibit Net Settlement, Excluded from Credit Limit, Cash Balance and Auction Security Symbol Start date End date - - - - Extended Period - - - - Remark: When a common stock has triggered the Market Surveillance Measures, securities of a listed company and securities with common stock as underlying assets (excluding DW) are also subject to the same measures which are as follows: 1. Cash Balance means each member must ensure that its customers pay the full amount in cash prior to trading. 2. Excluded from Credit Limit means the member must not use the security as collateral in the calculation of the customer's credit line in all types of account. 3. Prohibit Net Settlement means the member must not offset the trading value of buy amount and sell amount of a certain security on a given day. (The amount received from sale of the particular security will be credited back on the following day.) 4. Auction means orders are automatically matched only at the end of call period for 3 times a day; Pre-open1, Pre-open2 and Pre-Close Please note that the main factors used as criteria for the restricted securities above are the turnover ratio, the trading value and the price not corresponding with the fundamental factors such as P/E ratio, etc. ____________________________________________________________________