X0202 SCHEDULE 13G/A 0000929638-25-002964 0002068938 XXXXXXXX LIVE 2 Class A common stock, par value US$0.0001 per share 06/30/2026 0001876042 Circle Internet Group, Inc. 172573107 ONE WORLD TRADE CENTER NEW YORK NY 10007 Rule 13d-1(d) Chuang Xi Capital Ltd K3 7285170 10070152 7285170 10070152 17355322 N 7.4 CO (1) The value in rows 5 and 7 represents 7,285,170 shares of Class A common stock held of record by Chuang Xi Capital Limited as of June 30, 2026. (2) The value in rows 6 and 8 represents 10,070,152 shares of Class A common stock held of record by Wide Palace Limited as of June 30, 2026. IDG China Capital Fund GP III Associates Ltd. is the ultimate general partner of the holding entities of Wide Palace Limited. IDG-Accel China Capital GP II Associates Ltd. is the ultimate general partner of the holding entities of Chuang Xi Capital Limited. Chi Sing Ho and Quan Zhou are directors and shareholders of both IDG China Capital Fund GP III Associates Ltd. and IDG-Accel China Capital GP II Associates Ltd. By virtue of such relationship, Chuang Xi Capital Limited may be deemed to have shared voting and dispositive power with respect to these shares. (3) Percent of class represented by amount in row (9) is calculated based on 234,685,190 shares of Class A common stock outstanding as of July 30, 2026, as disclosed in the Issuer's quarterly report on Form 10-Q for the quarter ended June 30, 2026, filed with the Securities Exchange and Commission on August 5, 2026. IDG-Accel China Capital GP II Associates Ltd. E9 7285170 10070152 7285170 10070152 17355322 N 7.4 CO (1) The value in rows 5 and 7 represents 7,285,170 shares of Class A common stock held of record by Chuang Xi Capital Limited as of June 30, 2026. By virtue of being the ultimate general partner of the holding entities of Chuang Xi Capital Limited, IDG-Accel China Capital GP II Associates Ltd. may be deemed to have sole voting and dispositive power with respect to these shares. (2) The value in rows 6 and 8 represents 10,070,152 shares of Class A common stock held of record by Wide Palace Limited as of June 30, 2026. IDG China Capital Fund GP III Associates Ltd. is the ultimate general partner of the holding entities of Wide Palace Limited. Chi Sing Ho and Quan Zhou are directors and shareholders of both IDG China Capital Fund GP III Associates Ltd. and IDG-Accel China Capital GP II Associates Ltd. By virtue of such relationship, IDG-Accel China Capital GP II Associates Ltd. may be deemed to have shared voting and dispositive power with respect to these shares. (3) Percent of class represented by amount in row (9) is calculated based on 234,685,190 shares of Class A common stock outstanding as of July 30, 2026, as disclosed in the Issuer's quarterly report on Form 10-Q for the quarter ended June 30, 2026, filed with the Securities Exchange and Commission on August 5, 2026. Wide Palace Limited K3 10070152 7285170 10070152 7285170 17355322 N 7.4 CO (1) The value in rows 5 and 7 represents 10,070,152 shares of Class A common stock held of record by Wide Palace Limited as of June 30, 2026. (2) The value in rows 6 and 8 represents 7,285,170 shares of Class A common stock held of record by Chuang Xi Capital Limited as of June 30, 2026. IDG-Accel China Capital GP II Associates Ltd. is the ultimate general partner of the holding entities of Chuang Xi Capital Limited. IDG China Capital Fund GP III Associates Ltd. is the ultimate general partner of the holding entities of Wide Palace Limited. Chi Sing Ho and Quan Zhou are directors and shareholders of both IDG-Accel China Capital GP II Associates Ltd. and IDG China Capital Fund GP III Associates Ltd. By virtue of such relationship, Wide Palace Limited may be deemed to have shared voting and dispositive power with respect to these shares. (3) Percent of class represented by amount in row (9) is calculated based on 234,685,190 shares of Class A common stock outstanding as of July 30, 2026, as disclosed in the Issuer's quarterly report on Form 10-Q for the quarter ended June 30, 2026, filed with the Securities Exchange and Commission on August 5, 2026. IDG China Capital Fund GP III Associates Ltd. E9 10070152 7285170 10070152 7285170 17355322 N 7.4 CO (1) The value in rows 5 and 7 represents 10,070,152 shares of Class A common stock held of record by Wide Palace Limited as of June 30, 2026. By virtue of being the ultimate general partner of the holding entities of Wide Palace Limited, IDG China Capital Fund GP III Associates Ltd. may be deemed to have sole voting and dispositive power with respect to these shares. (2) The value in rows 6 and 8 represents 7,285,170 shares of Class A common stock held of record by Chuang Xi Capital Limited as of June 30, 2026. IDG-Accel China Capital GP II Associates Ltd. is the ultimate general partner of the holding entities of Chuang Xi Capital Limited. Chi Sing Ho and Quan Zhou are directors and shareholders of both IDG-Accel China Capital GP II Associates Ltd. and IDG China Capital Fund GP III Associates Ltd. By virtue of such relationship, IDG China Capital Fund GP III Associates Ltd. may be deemed to have shared voting and dispositive power with respect to these shares. (3) Percent of class represented by amount in row (9) is calculated based on 234,685,190 shares of Class A common stock outstanding as of July 30, 2026, as disclosed in the Issuer's quarterly report on Form 10-Q for the quarter ended June 30, 2026, filed with the Securities Exchange and Commission on August 5, 2026. Ho Chi Sing Z4 0 17355322 0 17355322 17355322 N 7.4 IN (1) The value in rows 6 and 8 represents (i) 7,285,170 shares of Class A common stock held of record by Chuang Xi Capital Limited, and (ii) 10,070,152 shares of Class A common stock held of record by Wide Palace Limited, each as of June 30, 2026. IDG-Accel China Capital GP II Associates Ltd. is the ultimate general partner of the holding entities of Chuang Xi Capital Limited, and IDG China Capital Fund GP III Associates Ltd. is the ultimate general partner of the holding entities of Wide Palace Limited. Chi Sing Ho and Quan Zhou are directors and shareholders of both IDG-Accel China Capital GP II Associates Ltd. and IDG China Capital Fund GP III Associates Ltd. By virtue of such relationship, Chi Sing Ho may be deemed to have shared voting and dispositive power with respect to these shares. (2) Percent of class represented by amount in row (9) is calculated based on 234,685,190 shares of Class A common stock outstanding as of July 30, 2026, as disclosed in the Issuer's quarterly report on Form 10-Q for the quarter ended June 30, 2026, filed with the Securities Exchange and Commission on August 5, 2026. Zhou Quan X1 0 17355322 0 17355322 17355322 N 7.4 IN (1) The value in rows 6 and 8 represents (i) 7,285,170 shares of Class A common stock held of record by Chuang Xi Capital Limited, and (ii) 10,070,152 shares of Class A common stock held of record by Wide Palace Limited, each as of June 30, 2026. IDG-Accel China Capital GP II Associates Ltd. is the ultimate general partner of the holding entities of Chuang Xi Capital Limited, and IDG China Capital Fund GP III Associates Ltd. is the ultimate general partner of the holding entities of Wide Palace Limited. Quan Zhou and Chi Sing Ho are directors and shareholders of both IDG-Accel China Capital GP II Associates Ltd. and IDG China Capital Fund GP III Associates Ltd. By virtue of such relationship, Quan Zhou may be deemed to have shared voting and dispositive power with respect to these shares. (2) Percent of class represented by amount in row (9) is calculated based on 234,685,190 shares of Class A common stock outstanding as of July 30, 2026, as disclosed in the Issuer's quarterly report on Form 10-Q for the quarter ended June 30, 2026, filed with the Securities Exchange and Commission on August 5, 2026. Circle Internet Group, Inc. ONE WORLD TRADE CENTER, NEW YORK, New York, 10007 1. Chuang Xi Capital Limited 2. IDG-Accel China Capital GP II Associates Ltd. 3. Wide Palace Limited 4. IDG China Capital Fund GP III Associates Ltd. 5. Chi Sing Ho 6. Quan Zhou For all reporting persons: Room 5505, 55/F, The Center 99 Queen's Road, Central Hong Kong Each of Chuang Xi Capital Limited and Wide Palace Limited is organized under the laws of Hong Kong. Each of IDG-Accel China Capital GP II Associates Ltd. and IDG China Capital Fund GP III Associates Ltd. is organized under the laws of the Cayman Islands. Chi Sing Ho is a citizen of Canada. Quan Zhou is a citizen of the United States of America. Y The information for each reporting person contained in Items 5-9 of the cover pages is incorporated herein by reference. Each of the reporting persons disclaims beneficial ownership of the reported securities except to the extent of their pecuniary interest in such securities. The information for each reporting person contained in Item 11 of the cover pages is incorporated herein by reference. The information for each reporting person contained in Item 5 of the cover pages is incorporated herein by reference. The information for each reporting person contained in Item 6 of the cover pages is incorporated herein by reference. The information for each reporting person contained in Item 7 of the cover pages is incorporated herein by reference. The information for each reporting person contained in Item 8 of the cover pages is incorporated herein by reference. Y Y Y Y Y Y Chuang Xi Capital Ltd /s/ Quan Zhou 08/11/2026 IDG-Accel China Capital GP II Associates Ltd. /s/ Quan Zhou 08/11/2026 Wide Palace Limited /s/ Quan Zhou 08/11/2026 IDG China Capital Fund GP III Associates Ltd. /s/ Quan Zhou 08/11/2026 Ho Chi Sing /s/ Chi Sing Ho 08/11/2026 Zhou Quan /s/ Quan Zhou 08/11/2026