WuXi AppTec Co., Ltd. announced a Next Day Disclosure Return on 10 June 2026 confirming the on-market buyback of 2.03 million H-shares on 10 June 2026. The repurchase was executed on the Hong Kong Stock Exchange at prices ranging between HKD 116.80 and HKD 121.30 per share, implying a volume-weighted average cost of HKD 119.53 and an aggregate cash outlay of HKD 242.53 million.

Following the transaction: • Issued H-shares (excluding treasury shares) declined to 495.78 million from 497.81 million. • Treasury shares increased to 14.69 million from 12.66 million. • Total issued shares remained unchanged at 510.48 million. • The latest repurchase represented 0.41 % of the company’s issued H-share capital immediately prior to the transaction.

The buyback was conducted under the mandate approved by shareholders on 28 April 2026, which authorises repurchases of up to 298.38 million shares. Cumulative purchases under this mandate now total 14.69 million shares, equivalent to 0.49 % of the shares outstanding on the mandate date, leaving approximately 283.69 million shares available for future repurchase.

A moratorium on issuing new shares or selling treasury shares is in effect until 10 July 2026, in line with Hong Kong Stock Exchange regulations following on-market share repurchases.