Change of the ceiling and floor price of AMKR03

Change of the ceiling and floor price Subject : Change of the ceiling and floor price of AMKR03 Company name - DR ON AMKOR TECHNOLOGY INC. (AMKR) ISSUED BY PI SECURITIES PUBLIC COMPANY LIMITED (AMKR03) New daily price limit : +/-100% of the last traded price of the preceding trading session Reason : - To align with the reference security prices in foreign markets Effective date : 30-Jul-2026 Remark : This will be effective from Thursday, July 30, 2026 since 10:35 hr. until the close of the Day Session ______________________________________________________________________