SCHEDULE 13G/A 0002003271 XXXXXXXX LIVE 1 Class A ordinary shares, par value US$0.000001 per share 12/31/2025 0001895597 Intchains Group Limited 45828E104 Building 16, Lane 999, Xinyuan South Rd Lin-gang Special Area, Pudong Shanghai F4 00000 Rule 13d-1(d) Golden Stone Capital Limited Y0 14099120 0 14099120 0 14099120 N 25.2 CO (1) The value in rows 5 and 7 represents 14,099,120 Class A ordinary shares held of record by Golden Stone Capital Limited as of December 31, 2025. (2) Percent of class represented by amount in row (9) is calculated based on an aggregate of 56,028,722 Class A ordinary shares issued and outstanding as of December 31, 2024, as reported in the Issuer's Form 20-F filed with the U.S. Securities and Exchange Commission on April 30, 2025. Zhaoyang Ma F4 14099120 0 14099120 0 14099120 N 25.2 IN (1) The value in rows 5 and 7 represents 14,099,120 Class A ordinary shares held of record by Golden Stone Capital Limited, a Samoa company 100% owned by Zhaoyang Ma as of December 31, 2025. (2) Percent of class represented by amount in row (9) is calculated based on an aggregate of 56,028,722 Class A ordinary shares issued and outstanding as of December 31, 2024, as reported in the Issuer's Form 20-F filed with the U.S. Securities and Exchange Commission on April 30, 2025. Intchains Group Limited Building 16, Lane 999, Xinyuan South Road, Lin-gang Special Area, Pudong, Shanghai, People's Republic of China Golden Stone Capital Limited, a Samoa company 100% owned by Zhaoyang Ma. Zhaoyang Ma, a citizen of the People's Republic of China. The address of each of Golden Stone Capital Limited and Zhaoyang Ma is as follows: c/o Offshore Chambers, P.O. 217, Apia, Samoa Golden Stone Capital Limited, a Samoa company Zhaoyang Ma, a citizen of the People's Republic of China N The information for each reporting person contained in Items 5-11 of the cover pages is incorporated herein by reference. The information for each reporting person contained in Items 5-11 of the cover pages is incorporated herein by reference. The information for each reporting person contained in Items 5-11 of the cover pages is incorporated herein by reference. The information for each reporting person contained in Items 5-11 of the cover pages is incorporated herein by reference. The information for each reporting person contained in Items 5-11 of the cover pages is incorporated herein by reference. The information for each reporting person contained in Items 5-11 of the cover pages is incorporated herein by reference. Y Y Y Y Y Y Golden Stone Capital Limited /s/ Zhaoyang Ma 01/27/2026 Zhaoyang Ma /s/ Zhaoyang Ma 01/27/2026