FORM 2 - Corporate Substantial Shareholder Notice
 
Form Serial Number: CS20260717E00422 
1. Date of relevant event: 14/07/2026
(dd/mm/yyyy)
2. Date when the substantial shareholder becomes aware of the relevant event / interest in the shares (if later): 16/07/2026
(dd/mm/yyyy)
3. Stock code: 03986
4. Name of listed corporation: GigaDevice Semiconductor Inc. - H Shares 
5. Class of shares: H Shares 
6. Number of issued shares in class: 33,253,100
7. Name of substantial shareholder: JPMorgan Chase & Co. 
8. Registered office: 270 Park Avenue, New York, New York, NY, 10017, United States
9. Principal place of business in Hong Kong: N/A 
15. Exchange on which listed: New York Stock Exchange
16. Name of listed parent and exchange on which parent is listed: N/A 
17. 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) Nature of consideration
Long position
1704Miscellaneous
Notice filed because you ceased to have a notifiable interest in the shares of the listed corporation (you must briefly describe the relevant event in the Supplementary Information box)
2201Interest of corporation controlled by you
2201Interest of corporation controlled by you
 2,377,398 HKD 695.0000 663.4760 660.8491
3101Cash
Short position 
 
 
 		            
18. Total shares immediately before the relevant event:
 Total number of sharesPercentage figure (%)
Long position3,540,81210.64
Short position974,8822.93
Lending Pool310,5610.93
19. Total shares immediately after the relevant event:
 Total number of sharesPercentage figure (%)
Long position1,163,4143.49
Short position775,2692.33
Lending Pool293,9310.88
20. Capacity in which interests disclosed in Box 19 are held:
Capacity codeNumber of shares
2101Beneficial owner
Long position865,583
Short position775,269
2102Investment manager
Long position3,900
Short position0
2502Approved lending agent
Long position293,931
Short position0

21. Further information in respect of derivative interests:
Derivatives codeNumber of shares
4102Listed derivatives - Cash settled
Long position0
Short position9,081
4105Unlisted derivatives - Physically settled
Long position103,068
Short position217,886
4106Unlisted derivatives - Cash settled
Long position87,848
Short position331,602
22. Further information in relation to interests of corporations controlled by substantial shareholder:
Name of controlled corporationAddress and place of incorporationName of controlling person% controlDirect interest (Y/N)Number of shares
J.P. Morgan Securities LLC270 Park Avenue New York NY 10017 United StatesJ.P. Morgan Broker-Dealer Holdings Inc.100.00Y
Long position112,698
Short position112,698
J.P. Morgan Investment Management Inc.270 Park Avenue New York NY 10017 United StatesJPMorgan Asset Management Holdings Inc.100.00Y
Long position3,900
Short position0
JPMorgan Chase Bank, National Association1111 Polaris Parkway Columbus OH 43240 United StatesJPMorgan Chase & Co.100.00Y
Long position293,931
Short position0
J.P. MORGAN SECURITIES PLC25 Bank Street Canary Wharf London E14 5JP EnglandJ.P. MORGAN CAPITAL HOLDINGS LIMITED100.00Y
Long position752,885
Short position662,571
J.P. Morgan Broker-Dealer Holdings Inc.4 Chase Metrotech Center 4th Floor Brooklyn NY 11245 United StatesJPMorgan Chase Holdings LLC100.00N
Long position112,698
Short position112,698
JPMorgan Chase Holdings LLC270 Park Avenue New York NY 10017 United StatesJPMorgan Chase & Co.100.00N
Long position116,598
Short position112,698
JPMorgan Asset Management Holdings Inc.270 Park Avenue New York NY 10017 United StatesJPMorgan Chase Holdings LLC100.00N
Long position3,900
Short position0
J.P. MORGAN CAPITAL HOLDINGS LIMITED25 Bank Street Canary Wharf London E14 5JP EnglandJ.P. Morgan International Finance Limited100.00N
Long position752,885
Short position662,571
J.P. Morgan International Finance Limited270 Park Avenue New York NY 10017 United StatesJPMorgan Chase Bank, National Association100.00N
Long position752,885
Short position662,571
JPMorgan Chase Bank, National Association1111 Polaris Parkway Columbus OH 43240 United StatesJPMorgan Chase & Co.100.00N
Long position752,885
Short position662,571

23. Further information in relation to interests held by substantial shareholder jointly with another person:
Name of joint shareholderAddressNumber of shares
 
24. Further information from a trustee, a beneficiary of a trust, or a person who set up a discretionary trust:
Names of trustAddressStatus codeNumber of shares
  
25. 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 substantial shareholder is interested under sections 317 and 318
26. Details of person(s) in accordance with whose directions the substantial shareholder or its directors are accustomed to act:
NamesAddressRelationship CodePercentage (%)
  
 
27. Supplementary information: JP Morgan Chase & Co. ceased to have a notifiable interest in the shares.
28. Log/Serial Number of the previous form:
29. Number of concert party document(s) under section 317 attached/uploaded:
Date of filing this Form 2: 17/07/2026
(dd/mm/yyyy)