SCHEDULE 13D/A 0001765660 XXXXXXXX LIVE 1 Common Shares, par value $0.00025 per share 09/30/2025 false 0001510593 98419E108 Xunlei Ltd

3709 Baishi Road Nanshan District Shenzhen F4 518000

Mr. JIANG Wen 86 13810367664 Xiaomi Campus, No. 33 Xi Erqi Middle Rd Haidian District, Beijing F4 100085 0001633589 N Best Ventures Limited (previously known as Xiaomi Ventures Limited) OO N D8 0.00 133018479.00 0.00 133018479.00 133018479.00 N 42.7 CO Row 13 is calculated based on 311,860,331 total outstanding Common Shares as of March 31, 2025, as reported by the Issuer's annual report on Form 20-F for the fiscal year ended December 31, 2024 filed on April 24, 2025, reflecting the reduction in outstanding shares resulting from the Issuer's share repurchase programs. 0001765660 N Xiaomi Corporation OO N E9 0.00 133018479.00 0.00 133018479.00 133018479.00 N 42.7 CO Row 13 is calculated based on 311,860,331 total outstanding Common Shares as of March 31, 2025, as reported by the Issuer's annual report on Form 20-F for the fiscal year ended December 31, 2024 filed on April 24, 2025, reflecting the reduction in outstanding shares resulting from the Issuer's share repurchase programs. Common Shares, par value $0.00025 per share Xunlei Ltd 3709 Baishi Road Nanshan District Shenzhen F4 518000 This Amendment No. 1 (this ''Amendment'') amends the statement on Schedule 13D filed by the Reporting Persons on April 24, 2020 (the "Schedule 13D"). Capitalized terms used herein and not otherwise defined have the respective meanings ascribed to them in the Schedule 13D. Item 2(a) of the Schedule 13D is hereby amended by restating the second-to-last paragraph with below: The name, citizenship, occupation and principal business address of each director and executive officer of the Reporting Persons as of the date of this Amendment No.1 are listed in Exhibit 99.7 hereto, which is incorporated herein by reference. Item 2(b) of the Schedule 13D is hereby amended and supplemented as follows: The information set forth in Item 2(a) of this Amendment No. 1 is hereby incorporated herein by reference. Item 2(c) of the Schedule 13D is hereby amended and supplemented as follows: The information set forth in Item 2(a) of this Amendment No. 1 is hereby incorporated herein by reference. Item 2(d) of the Schedule 13D is hereby amended and supplemented as follows: The information set forth in Item 2(a) of this Amendment No. 1 is hereby incorporated herein by reference. Item 2(e) of the Schedule 13D is hereby amended and supplemented as follows: The information set forth in Item 2(a) of this Amendment No. 1 is hereby incorporated herein by reference. Item 2(f) of the Schedule 13D is hereby amended and supplemented as follows: The information set forth in Item 2(a) of this Amendment No. 1 is hereby incorporated herein by reference. Exhibit 99.1 Joint Filing Agreement (incorporated herein by reference to Exhibit 99.1 to the Schedule 13D filed on April 24, 2020 by the Reporting Persons with the Securities and Exchange Commission) Exhibit 99.7 Directors and Executive officers of the Reporting Persons Best Ventures Limited (previously known as Xiaomi Ventures Limited) /s/ Sai Wai Alain Lam 11/13/2025 Xiaomi Corporation /s/ Jun Lei 11/13/2025