X0202 SCHEDULE 13D/A 0002025889 XXXXXXXX LIVE 1 Class A Ordinary Shares 06/12/2026 false 0002044255 G0395R106 Antalpha Platform Holding Co

7 TEMASEK BOULEVARD, #31-02 SUNTEC TOWER ONE Singapore U0 038987

Tether Global Investments Fund 4420 4621 1793 Final Av. La Revolucion, Edif. Centro Corporativo Presidente Plaza, Nivel 12 San Salvador H3 00000 Daniel Woodard (212) 547-5400 McDermott Will & Schulte LLP One Vanderbilt Avenue New York NY 10017 0002025889 N Tether Global Investments Fund, S.I.C.A.F., S.A. WC N H3 0.00 1950000.00 0.00 1950000.00 1950000.00 N 8.1 CO Note in relation to Items 8, 10 and 11: Includes 1,950,000 Class A Ordinary Shares, par value $0.001 per share ("Ordinary Shares") of Antalpha Platform Holding Company (the "Issuer") held by Tether International, S.A. de C.V., a controlled subsidiary of Tether Global Investments Fund, S.I.C.A.F., S.A. Note in relation to Item 13: This percentage is calculated based upon 23,980,257 Ordinary Shares outstanding on December 31, 2025, as reported in the Issuer's Annual Report on Form 20-F filed with the Securities and Exchange Commission on April 14, 2026. Y Tether Investments, S.A. de C.V. WC N H3 0.00 0.00 0.00 0.00 0.00 N 0 CO Y Tether International, S.A. de C.V. WC N H3 0.00 1950000.00 0.00 1950000.00 1950000.00 N 8.1 CO Note in relation to Item 13: This percentage is calculated based upon 23,980,257 Ordinary Shares outstanding on December 31, 2025, as reported in the Issuer's Annual Report on Form 20-F filed with the Securities and Exchange Commission on April 14, 2026. 0002050373 N Giancarlo Devasini WC N L6 0.00 1950000.00 0.00 1950000.00 1950000.00 N 8.1 IN Note in relation to Items 8, 10 and 11: Includes 1,950,000 Ordinary Shares held by Tether International, S.A. de C.V., a controlled subsidiary of Tether Global Investments Fund, S.I.C.A.F., S.A. Mr. Devasini has a greater than 50% voting interest in Tether Global Investments Fund, S.I.C.A.F., S.A. 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 23,980,257 Ordinary Shares outstanding on December 31, 2025, as reported in the Issuer's Annual Report on Form 20-F filed with the Securities and Exchange Commission on April 14, 2026. Class A Ordinary Shares Antalpha Platform Holding Co 7 TEMASEK BOULEVARD, #31-02 SUNTEC TOWER ONE Singapore U0 038987 This statement on Schedule 13D amends the Schedule 13D of Tether Global Investments Fund, S.I.C.A.F., S.A., an El Salvador entity, Tether Investments, S.A. de C.V., an El Salvador entity ("Tether Investments") and Giancarlo Devasini that was originally filed with the Securities and Exchange Commission (the "SEC") on October 24, 2025 (as amended, the "Schedule 13D") with respect to the Class A Ordinary Shares, par value $0.001 per share ("Ordinary Shares") of Antalpha Platform Holding Company, a company incorporated in the Cayman Islands (the "Issuer"). This amendment to the Schedule 13D is being filed by Tether Global Investments Fund, S.I.C.A.F., S.A., Tether International, S.A. de C.V., an El Salvador entity, Tether Investments, and Giancarlo Devasini (collectively, the "Reporting Persons") and constitutes Amendment No. 1 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. Item 4 is hereby amended and supplemented to add the following: Effective on June 12, 2026, Tether Investments transferred 1,950,000 Ordinary Shares to Tether International, S.A. de C.V. (the "Transfer"). The Transfer resulted in no change in the aggregate number of Ordinary Shares beneficially owned by the Reporting Persons. The Reporting Persons beneficially own an aggregate of 1,950,000 Ordinary Shares, representing 8.1% of the outstanding Ordinary Shares. This percentage is calculated based upon 23,980,257 Ordinary Shares outstanding December 31, 2025, as reported in the Issuer's Annual Report on Form 20-F filed with the Securities and Exchange Commission on April 14, 2026. Each of the Reporting Persons (other than Tether Investments) has shared voting and dispositive power with respect to the beneficially owned 1,950,000 Ordinary Shares. Except for the Transfer, no transactions in the Ordinary Shares were effected by the Reporting Persons since the Reporting Persons' in the last 60 days. None. Not applicable. Schedule A - Executive Officers and Directors Exhibit 1 - Agreement of filing persons relating to filing of joint statement per Rule 13d-1(k). Tether Global Investments Fund, S.I.C.A.F., S.A. /s/ Omar Rossi 06/16/2026 Tether Investments, S.A. de C.V. /s/ Giancarlo Devasini 06/16/2026 Tether International, S.A. de C.V. /s/ Giancarlo Devasini 06/16/2026 Giancarlo Devasini /s/ Giancarlo Devasini 06/16/2026