Genscript Biotech Corporation will reduce the trading board lot of its ordinary shares on the Hong Kong Stock Exchange from 2,000 shares to 1,000 shares, effective 9:00 a.m. on 14 October 2026.

The move halves the minimum investment size from approximately HK$82,800 to HK$41,400, calculated using the 21 September 2026 closing price of HK$41.40 per share. The board believes the lower entry threshold will broaden investor access and potentially improve share liquidity; shareholders’ rights remain unchanged.

Because the new 1,000-share lot is an exact divisor of the existing 2,000-share lot, no additional odd lots will be generated and no matching service is planned.

Key timetable • Free exchange of existing certificates (2,000-share lots) for new certificates (1,000-share lots): 29 September – 6 November 2026 • Last day to trade in 2,000-share lots at the original counter: 13 October 2026 • Parallel trading of 1,000- and 2,000-share lots: 14 October – 4 November 2026

Existing certificates remain valid for transfer and settlement. New certificates will maintain the current blue colour and will differ only in the number of shares represented and the company logo.