X0202 SCHEDULE 13G 0002025889 XXXXXXXX LIVE Common Stock, par value $0.01 per share 05/17/2026 0001389545 Stablecoin Development Corp 66987P508 2000 POWELL STREET SUITE 1150 EMERYVILLE CA 94608 Rule 13d-1(c) Tether Global Investments Fund, S.I.C.A.F., S.A. H3 0 3009502.00 0 3009502.00 3009502.00 Y 9.99 OO Tether Investments, S.A. de C.V. H3 0 3009502.00 0 3009502.00 3009502.00 Y 9.99 CO Giancarlo Devasini L6 0 3009502.00 0 3009502.00 3009502.00 Y 9.99 IN Stablecoin Development Corp 2000 POWELL STREET, SUITE 1150 EMERYVILLE CA 94608 This statement is being filed by Tether Global Investments Fund, S.I.C.A.F., S.A., Tether Investments, S.A. de C.V. ("Tether Investments") and Giancarlo Devasini (collectively, the "Reporting Persons"). The principal business address of the Reporting Persons is Final Av. La Revolucion, Colonia San Benito, Edif. Centro, Corporativo Presidente Plaza, Nivel 12, Oficina 2, Distrito de San Salvador, Municipio de San Salvador Centro, Republica de El Salvador. Tether Global Investments Fund, S.I.C.A.F., S.A. and Tether Investments are organized under the laws of the Republic of El Salvador. Mr. Devasini is an Italian citizen. Y Due to the Ownership Limitation (as defined below), each Reporting Person may be deemed to beneficially own 3,009,502 shares of Common Stock, consisting of warrants exercisable for the same number of shares of Common Stock. The securities reported herein are directly owned by Tether Investments, a controlled subsidiary of Tether Global Investments Fund, S.I.C.A.F., S.A. Mr. Giancarlo Devasini holds a greater than 50% voting interest in Tether Global Investments Fund, S.I.C.A.F., S.A., and thus indirectly holds voting and dispositive power with respect to the securities held by Tether Global Investments Fund, S.I.C.A.F., S.A., including securities held by Tether Investments. The number of shares of Common Stock into which certain warrants held by Tether Investments are convertible is limited pursuant to the terms of such warrants to that number of shares of Common Stock that would result in the Reporting Persons and their affiliates having aggregate beneficial ownership of more than 9.99% of the total issued and outstanding shares of Common Stock (the "Ownership Limitation"). In accordance with Rule 13d-4 under the Exchange Act, the Reporting Persons disclaim beneficial ownership of any and all shares of Common Stock issuable upon any conversion of the warrants held by Tether Investments to the extent that such conversion would cause the Reporting Persons' aggregate beneficial ownership to exceed or remain above the Ownership Limitation. Due to the Ownership Limitation, as of the date of this filing, the Reporting Persons disclaim beneficial ownership with respect to the remaining 5,740,498 shares of Common Stock into which such warrants would otherwise be convertible. See Item 11 of each of the cover pages. This percentage is calculated based upon (i) 27,115,646 shares of Common Stock reported as issued and outstanding as of May 11, 2026, as disclosed in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on May 15, 2026, together with (ii) 3,009,502 shares of Common Stock issuable upon the conversion of certain warrants held by Tether Investments. See Item 5 of each of the cover pages. See Item 6 of each of the cover pages. See Item 7 of each of the cover pages. See Item 8 of each of the cover pages. Y Y N See Items 2 and 4 above. Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. 99.1. Joint Filing Agreement. Tether Global Investments Fund, S.I.C.A.F., S.A. /s/ Omar Rossi 05/22/2026 Tether Investments, S.A. de C.V. /s/ Giancarlo Devasini 05/22/2026 Giancarlo Devasini /s/ Giancarlo Devasini 05/22/2026