SET requests to clarify news or information Subject : Clarification of news or information requested by SET Description : Qualitech Public Company Limited (the "Company") has received resignation letters from an Independent Director, the Chairman of the Audit Committee, and an Audit Committee member, citing the stated reasons, and expressing their intention not to be re-nominated for reappointment as directors by the shareholders' meeting (Reference letters No. Elen 005/2026 dated 22 April 2026 and No. Elen 006/2026 dated 23 April 2026). The Company hereby clarifies that the resignation of the Independent Director, the Chairman of the Audit Committee, and the Audit Committee member as mentioned above has no impact on the Company's management, nor does it affect the performance of duties of the additionally appointed Audit Committee members in any respect (Reference letter No. Elen 005/2026 dated 22 April 2026). In this regard, the Company has duly completed the registration of the change of directors with the Department of Business Development. Please be informed accordingly. Signature ___________________________ ( Miss Rinnattha Akeassavapirom ) Acting Chief Executive Officer Authorized to sign on behalf of the company ______________________________________________________________________ This announcement was prepared and disseminated by listed company or issuer through the electronic system which is provided for the purpose of dissemination of the information and related documents of listed company or issuer to the Stock Exchange of Thailand only. The Stock Exchange of Thailand has no responsibility for the correctness and completeness of any statements, figures, reports or opinions contained in this announcement, and has no liability for any losses and damages in any cases. In case you have any inquiries or clarification regarding this announcement, please directly contact listed company or issuer who made this announcement. If you would like to see the full details of this information, please click view "full details" in attached file.