X0609 4/A 2025-10-16 2025-11-03 0001389545 Stablecoin Development Corp SDEV 0002091727 Kazley Michael John false 1111 LINCOLN ROAD, SUITE 500 MIAMI BEACH FL 33139 1 1 1 Chief Executive Officer 0 Common Stock 2025-10-21 4 C 0 11361216 0 A 11361216 I By R01 Entities Pre-Funded Warrants (Right to Buy) 0.01 2025-10-16 4 P 0 11332020 0 A 2026-01-01 Common Stock 11332020 11332020 I By R01 Entities This amendment updates the beneficial ownership of the Reporting Persons to reflect the Issuer's 1-for-5 reverse stock split (the "Reverse Stock Split") that became effective on February 20, 2026, pursuant to which the number of shares of Common Stock held by the Reporting Persons was adjusted from 56,806,080 to 11,361,216. The reported securities may also be deemed to be beneficially owned by R01 Fund LP ("R01 LP"), R01 Capital LLC ("R01 Capital") and R01 Capital Manager LLC ("R01 Capital Manager" and together with R01 LP, R01 Capital and the Reporting Person, the "R01 Entities"), each of which or whom disclaim beneficial ownership of these shares, except to the extent of its or his pecuniary interest in such shares, if any. R01 Capital is the general partner of R01 LP. R01 Capital Manager is the investment manager for R01 Capital. The Reporting Person is the managing member of R01 Capital Manager. This amendment updates the beneficial ownership of the Reporting Persons to reflect anti-dilution adjustments under the pre-funded warrants issued by the Issuer to R01 LP and other investors on October 16, 2025 (the "Pre-Funded Warrants"). As a result of dilutive issuances of the Issuer's Common Stock during the fourth quarter of 2025, the anti-dilution adjustments of the Pre-Funded Warrants increased the Reporting Person's aggregate number of shares of Common Stock issuable upon exercise of the Pre-Funded Warrants to 56,660,098 on a pre-Reverse Stock Split basis, which was adjusted to 11,332,020 on a post-Reverse Stock Split basis.. The Pre-Funded Warrants have no expiration date and are exercisable for shares of Common Stock at any time. /s/ Michael Kazley 2026-04-30