1590 Airtac-KY to Participate in Morgan Stanley Taiwan's Online Investor Briefing

Release Date: July 15, 2026 Statement Date: July 14, 2026 Statement Time: 14:01:27 Company Code: 1590 Company Name: Airtac-KY

Subject: Announcement of Airtac-KY's Participation in an Online Investor Briefing Hosted by Morgan Stanley Taiwan Co., Ltd.

Applicable Clause: Clause 12 Factual Date: July 28, 2026

Details: Applicable under Clause 4, Item XX: 12 Factual Date: July 28, 2026

1. Date of Investor Briefing: July 28, 2026 2. Time of Investor Briefing: 4:00 PM 3. Location of Investor Briefing: Online Investor Briefing 4. Summary of Investor Briefing: Airtac-KY has been invited to participate in the online investor briefing titled '2Q26 Earnings Call' hosted by Morgan Stanley Taiwan, where the company will present its operational status for the second quarter of 2026. 5. Other Matters to be Disclosed: None

For complete financial and business information, please refer to the investor briefing schedule or related sections on the Public Information Observation System.