On 12 June 2026, WuXi AppTec Co., Ltd. executed simultaneous share buybacks on both the Hong Kong Stock Exchange (H-shares) and the Shanghai Stock Exchange (A-shares), repurchasing a combined 3.32 million shares for treasury at an aggregate cost equivalent to roughly HKD 403 million.

H-share repurchase highlights • Volume: 2.30 million shares, representing 0.47 % of the 494.34 million H-shares outstanding prior to the transaction. • Price range: HKD 121.20 to HKD 127.30 per share; volume-weighted average price: HKD 125.39. • Consideration: HKD 288.55 million. • Treasury impact: H-share treasury stock rose from 16.14 million to 18.44 million shares. Issued H-shares outstanding fell to 492.04 million, while total H-share capital remained 510.48 million due to treasury treatment. • The buyback utilised 18.44 million shares, or 0.62 % of the 2.98 billion shares authorised under the mandate approved on 28 April 2026. A 30-day moratorium on new share issues or treasury share sales is in effect until 12 July 2026.

A-share repurchase highlights • Volume: 1.02 million shares, equal to 0.04 % of the 2.47 billion A-shares outstanding before the transaction. • Price range: RMB 95.11 to RMB 99.83 per share; volume-weighted average price: RMB 98.18. • Consideration: RMB 100.01 million. • Treasury impact: A-share treasury stock increased from 1.04 million to 2.05 million shares. Issued A-shares outstanding declined to 2.47 billion, with total A-share capital steady at 2.47 billion shares. • The company reiterated that the repurchased A-shares are earmarked for its employee stock ownership plan.

Regulatory compliance WuXi AppTec confirmed that all buybacks were conducted under board-approved mandates and complied with the respective Hong Kong and Shanghai stock exchange regulations, with all requisite filings completed.