Form SCHEDULE 13D/A Stablecoin Development Filed by: Sky Frontier Foundation

July 22, 2026 11:07 AM EDT





If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




schemaVersion:


SCHEDULE 13D




Comment for Type of Reporting Person:
Non-U.S. Foundation This Amendment No. 1 to Schedule 13D (this "Amendment") amends and supplements the Schedule 13D filed with the Securities and Exchange Commission on May 27, 2026 (the "Original Schedule 13D") by Sky Frontier Foundation (the "Reporting Person") relating to the common stock, $0.01 par value per share (the "Common Stock"), of Stablecoin Development Corp (the "Issuer"). Capitalized terms used but not defined in this Amendment have the meanings given to them in the Original Schedule 13D. Except as expressly amended and supplemented by this Amendment, the Original Schedule 13D remains in full force and effect. This Amendment is being filed to report a change in the Reporting Person's beneficial ownership percentage resulting from an increase in the number of outstanding shares of Common Stock. As reported in the Issuer's Current Report on Form 8-K filed on June 17, 2026, following the cashless exercise by R01 Fund LP and Framework Ventures IV L.P. of their October 2025 pre-funded warrants, 50,449,780 shares of Common Stock were issued and outstanding as of June 15, 2026. As a result of the increased number of outstanding shares, the 4,000,000 shares of Common Stock issuable to the Reporting Person upon exercise of the first tranche of the Warrant within 60 days no longer exceed the Beneficial Ownership Limitation, and the Reporting Person is now deemed to beneficially own those 4,000,000 shares, representing approximately 7.4% of the outstanding Common Stock.


SCHEDULE 13D


 
Sky Frontier Foundation
 
Signature:/s/ David Garcia
Name/Title:David Garcia, Director
Date:07/22/2026


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