【Zyxel Communications Corp.】Announcement by Subsidiary Guan Investment Co., Ltd. of the Board's Resolution on the Ex-dividend Record Date

1. Date of resolution by the Board of Directors, Shareholders' Meeting or company decision: 2026/05/04 2. Type of ex-rights or ex-dividend (please fill in "ex-rights", "ex-dividend" or "ex-rights and ex-dividend"): Ex-dividend 3. Type and amount of dividends distributed: Cash dividend for common shares NTD 4,321,499, with NTD 0.48547986 distributed per share. 4. Ex-rights (ex-dividend) trading date: NA 5. Last day for transfer of shares: 2026/07/02 6. Start date of share transfer suspension: 2026/07/03 7. End date of share transfer suspension: 2026/07/07 8. Ex-rights (ex-dividend) record date: 2026/07/07 9. Other matters to be stated: The cash dividend payment date is set for July 20, 2026.