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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13D/A 0001104659-24-068877 0002025889 XXXXXXXX LIVE 10 Class A ordinary shares, par value $0.0000001 per share 11/21/2025 false 0001899123 G11448100 BITDEER TECHNOLOGIES GROUP 08 Kallang Avenue Aperia Tower 1, #09-03/04 Singapore U0 339509 Tether Holdings, S.A. de C.V. 443333355842 Final Av. La Revolucion, Edif. Centro Corporativo Presidente Plaza, Nivel 12 San Salvador H3 00000 Daniel Woodard (212) 547-5400 McDermott Will & Emery LLP One Vanderbilt Avenue New York NY 10017 0002025889 N Tether Holdings, S.A. de C.V. WC N H3 0.00 32244062.00 0.00 32244062.00 32244062.00 N 18.2 CO Note in relation to Items 8, 10 and 11: Includes 32,244,062 Class A ordinary shares, par value $0.0000001 per share ("Class A Shares") of Bitdeer Technologies Group held by Tether Investments, S.A. de C.V., a wholly owned subsidiary of Tether Holdings, S.A. de C.V. Note in relation to Item 13: This percentage is calculated based upon 177,344,567 Class A Shares outstanding on September 30, 2025, as reported in the Issuer's prospectus supplement filed with the Securities and Exchange Commission pursuant to Rule 424(b)(5) on November 14, 2025. Y Tether Investments, S.A. de C.V. WC N H3 0.00 32244062.00 0.00 32244062.00 32244062.00 N 18.2 CO Note in relation to Item 13: This percentage is calculated based upon 177,344,567 Class A Shares outstanding on September 30, 2025, as reported in the Issuer's prospectus supplement filed with the Securities and Exchange Commission pursuant to Rule 424(b)(5) on November 14, 2025. Y Giancarlo Devasini WC N L6 0.00 32244062.00 0.00 32244062.00 32244062.00 N 18.2 IN Note in relation to Items 8, 10 and 11: Includes 32,244,062 Class A ordinary shares, par value $0.0000001 per share ("Class A Shares") of Bitdeer Technologies Group held by Tether Investments, S.A. de C.V., a wholly owned subsidiary of Tether Holdings, S.A. de C.V. Mr. Devasini has a greater than 50% voting interest in Tether Holdings, S.A. de C.V. The reporting person disclaims beneficial ownership of these shares except to the extent of the reporting person's pecuniary interest. Note in relation to Item 13: This percentage is calculated based upon 177,344,567 Class A Shares outstanding on September 30, 2025, as reported in the Issuer's prospectus supplement filed with the Securities and Exchange Commission pursuant to Rule 424(b)(5) on November 14, 2025. Class A ordinary shares, par value $0.0000001 per share BITDEER TECHNOLOGIES GROUP 08 Kallang Avenue Aperia Tower 1, #09-03/04 Singapore U0 339509 This statement on Schedule 13D amends the Schedule 13D of Tether Holdings Limited, a British Virgin Islands business company, Tether International Limited, a British Virgin Islands business company, Ludovicus Jan Van der Velde and Giancarlo Devasini that was originally filed with the Securities and Exchange Commission on June 6, 2024, as amended by Amendment No. 1 filed on August 8, 2024, Amendment No. 2 filed on September 3, 2024, Amendment No. 3 filed on November 7, 2024, Amendment No. 4 filed on January 22, 2025, Amendment No. 5 filed on March 17, 2025, Amendment No. 6 filed on April 8, 2025, Amendment No. 7 filed on April 15, 2025, Amendment No. 8 filed on April 23, 2025 and Amendment No. 9 filed on November 10, 2025 (as amended, the "Schedule 13D") with respect to the Class A ordinary shares, par value $0.0000001 per share ("Class A Shares") of Bitdeer Technologies Group, an exempted company incorporated in the Cayman Islands (the "Issuer"). This amendment to the Schedule 13D is being filed by Tether Holdings, S.A. de C.V. (f/k/a Tether Holdings Limited), an El Salvador entity, an El Salvador entity, Tether Investments, S.A. de C.V. (f/k/a Tether Investments Limited), an El Salvador entity ("Tether Investments"), and Giancarlo Devasini (collectively, the "Reporting Persons") and constitutes Amendment No.10 to the Schedule 13D. Capitalized terms used but not defined herein have the meanings given to such terms in the Schedule 13D. Except as set forth herein, the Schedule 13D is unmodified. The Reporting Persons beneficially own an aggregate of 32,244,062 of the Issuer's Class A Shares, representing 18.2% of the outstanding Class A Shares. This percentage is calculated based upon 177,344,567 Class A Shares outstanding on September 30, 2025, as reported in the Issuer's prospectus supplement filed with the Securities and Exchange Commission pursuant to Rule 424(b)(5) on November 14, 2025. Each of the Reporting Persons has shared voting and dispositive power with respect to the beneficially owned 32,244,062 of the Issuer's Class A Shares. Schedule B sets forth the transactions in the Common Shares effected by the Reporting Persons during the past 60 days. None. Not applicable. Schedule A - Executive Officers and Directors Schedule B - Open Market Purchases Exhibit 1 - Agreement of filing persons relating to filing of joint statement per Rule 13d-1(k). Tether Holdings, S.A. de C.V. /s/ Giancarlo Devasini Giancarlo Devasini, President 11/25/2025 Tether Investments, S.A. de C.V. /s/ Giancarlo Devasini Giancarlo Devasini, Sole Administrator 11/25/2025 Giancarlo Devasini /s/ Giancarlo Devasini Giancarlo Devasini, individually 11/25/2025