GigaDevice Semiconductor Inc. will convene its 2026 fourth extraordinary general meeting (EGM) on 20 October 2026 at 2:30 p.m. in Beijing. Shareholders will deliberate three resolutions, two ordinary and one special.

1. Increase in Related-Party Transaction Limits • The board seeks approval to raise the estimated ceiling for daily related-party transactions in 2026 and to set a forecast for such transactions from January to April 2027.

2. Directors’ and Senior Management Liability Insurance • An ordinary resolution proposes the purchase of liability insurance covering directors and senior executives.

3. Registered Capital Adjustment and Articles Amendment • A special resolution will address a change in the company’s registered capital and corresponding amendments to its Articles of Association.

Key participation details • Shareholders recorded in the H-share register by close of business on 13 October 2026 are eligible to vote. • The H-share register will be closed from 14 to 20 October 2026, inclusive. • Proxy forms must reach Tricor Investor Services Limited no later than 2:30 p.m. on 19 October 2026.

The board of directors—comprising three executive, one non-executive and five independent non-executive directors—issued the notice on 28 September 2026.