FORM 3A - Director/Chief Executive Notice - Interests in Shares of Listed Corporation
 
Form Serial Number: DA20251113E00473
1. Date of relevant event: 11/11/2025
(dd/mm/yyyy)
2. Date when director became aware of the relevant event/ interest in the shares (if later):
(dd/mm/yyyy)
3. Stock code: 02269
4. Name of listed corporation: WuXi Biologics (Cayman) Inc. 
5. Class of shares: Ordinary Shares 
6. Number of issued shares in class: 4,083,627,254
7. Name of director (English) as printed on HKID Card/Passport:
(Surname) Chen
(Other names) Zhisheng
10. Name of director (Chinese): 陳智勝 
11. Chinese Character Code as printed on HKID Card:
 
24. Details of relevant event:
  Brief description of relevant event Capacity in which shares were/are held Number of shares bought/sold or involved Currency of transaction On Exchange Off Exchange
Before relevant event After relevant event Highest price (per share) Average price (per share) Average consideration (per share) Consideration code
Long position 
1303There has been a change in nature of your interest in the shares because:
you have exercised rights to the shares under equity derivatives
 
2101Beneficial owner
 
2101Beneficial owner
 		 4,500,000  HKD      1.2933 
3101Cash
 
Short position 
 
 
 		            
 
25. Total shares in listed corporation immediately before the relevant event:
 Total number of sharesPercentage figure (%)
Long position94,536,7192.32
 
26. Total shares in listed corporation immediately after the relevant event:
 Total number of sharesPercentage figure (%)
Long position94,536,7192.32
 
27. Capacity in which interests disclosed in Box 26 are held:
Code describing capacityNumber of shares
2101Beneficial owner
Long position82,834,467
2307Founder of a discretionary trust who can influence how the trustee exercises his discretion
Long position11,702,252
 
28. Further information in derivative interests in listed corporation :
Derivatives code Exercise period (dd/mm/yyyy) Consideration - if derivatives granted by listed corporation Number of shares
  BeginsEndsCurrencyPrice for grantCurrencyExercise priceCurrencyPrice on assignment 
Long position
4105Unlisted derivatives - Physically settled
07/01/201606/01/2026HKD1USD0.167  42,559,000
Long position
4105Unlisted derivatives - Physically settled
15/03/201714/03/2027HKD1USD0.340  17,532,000
Long position
4108Unlisted derivatives - Other (you must describe the category of derivatives in the Supplementary Information box)
12/11/2022       471,519
Long position
4108Unlisted derivatives - Other (you must describe the category of derivatives in the Supplementary Information box)
16/06/202316/06/2026      378,080
Long position
4108Unlisted derivatives - Other (you must describe the category of derivatives in the Supplementary Information box)
10/06/202410/06/2027      794,601
Long position
4108Unlisted derivatives - Other (you must describe the category of derivatives in the Supplementary Information box)
10/06/2023       877,694
Long position
4108Unlisted derivatives - Other (you must describe the category of derivatives in the Supplementary Information box)
24/08/202524/08/2028      417,983
Long position
4108Unlisted derivatives - Other (you must describe the category of derivatives in the Supplementary Information box)
24/08/2024       957,015
Long position
4108Unlisted derivatives - Other (you must describe the category of derivatives in the Supplementary Information box)
21/11/202421/11/2025      683,608
Long position
4108Unlisted derivatives - Other (you must describe the category of derivatives in the Supplementary Information box)
27/03/202627/03/2029      740,638
Long position
4108Unlisted derivatives - Other (you must describe the category of derivatives in the Supplementary Information box)
26/03/202726/03/2030      1,310,465
 
29. Further information in relation to interests of children under 18 and/or spouse:
Child/SpouseName of child/spouseNumber of shares
SpouseYan Zhao
Long position11,702,252
ChildEmma Lei Chan
Long position11,702,252
 
30. Further information in relation to interests of corporations controlled by Director:
Name of controlled corporationAddress and place of incorporationName of controlling person% controlDirect interest (Y/N)Number of shares
   
 
31. Further information in relation to interests held by Director jointly with another person:
Name of joint shareholderAddressNumber of shares
 
 
32. Further information from a director who is a trustee, or beneficiary of a trust, or a person who has set up a Discretionary Trust:
Names of TrustAddressStatus codeNumber of shares
(private)Addresses of individuals are not displayed.
5103Founder of a discretionary trust who can influence how the trustee exercises his discretion
Long position11,702,252
 
33. Further information from a party to an agreement under Section 317 (Please see Notes for further information required):
Names of other partiesAddressNumber of shares
 
Total number of shares in which a director is interested under sections 317 and 318
 
34. Supplementary information: Box 24: On November 11, 2025, Dr. Chen exercised 4,500,000 options pursuant to the Pre-IPO Share Option Scheme of the Company considering the imminent expiration of the exercise period of such options. 考虑到根据公司首次公开发售前购股权计划授予陈博士的期权行权期将届满，他已于2025年11月11日行使了4,500,000份期权。Box 28: Represents the restricted shares granted to Dr. Chen pursuant to the share schemes of the Company. 代表根据公司股份计划向陈博士授予的受限制股份。
35. Log/Serial Number of the previous form:
36. Number of concert party document(s) under section 317 attached/uploaded: 0
Date of filing this Form 3A: 13/11/2025
(dd/mm/yyyy)