X0202 SCHEDULE 13D/A 0001829126-25-008156 0001990517 XXXXXXXX LIVE 4 Common Stock, $0.01 par value 04/29/2026 false 0001389545 66987P508 Stablecoin Development Corp

2000 POWELL STREET SUITE 1150 EMERYVILLE CA 94608

R01 FUND LP 305-982-7994 1111 Lincoln Road Suite 500 Miami Beach FL 33139 0001990517 N R01 Fund LP a WC N DE 0.00 22152695.00 0.00 22152695.00 22152695.00 N 44.5 PN This Amendment No. 4 is being filed to update the beneficial ownership of the Reporting Persons to reflect anti-dilution adjustments under certain pre-funded warrants issued by the Issuer to R01 Fund LP and other investors on October 16, 2025 (the "Pre-Funded Warrants") which, as a result of dilutive issuances of the Issuer's Common Stock during the fourth quarter of 2025, increased the aggregate number of shares of Common Stock issuable upon exercise of the Pre-Funded Warrants to 11,332,020 (on a post-reverse stock split basis). The reported securities may also be deemed to be beneficially owned by R01 Capital LLC, R01 Capital Manager LLC and Michael Kazley, each of which or whom disclaims beneficial ownership of such shares, except to the extent of its or his pecuniary interest therein. All percentage calculations set forth herein are based on the aggregate of 49,779,686 shares of Common Stock outstanding as of April 29, 2026. 0002091715 N R01 Capital LLC a WC N DE 0.00 22152695.00 0.00 22152695.00 22152695.00 N 44.5 OO This Amendment No. 4 is being filed to update the beneficial ownership of the Reporting Persons to reflect anti-dilution adjustments under certain pre-funded warrants issued by the Issuer to R01 Fund LP and other investors on October 16, 2025 (the "Pre-Funded Warrants") which, as a result of dilutive issuances of the Issuer"s Common Stock during the fourth quarter of 2025, increased the aggregate number of shares of Common Stock issuable upon exercise of the Pre-Funded Warrants to 11,332,020 (on a post-reverse stock split basis). The reported securities may also be deemed to be beneficially owned by R01 Capital LLC, R01 Capital Manager LLC and Michael Kazley, each of which or whom disclaims beneficial ownership of such shares, except to the extent of its or his pecuniary interest therein. All percentage calculations set forth herein are based on the aggregate of 49,779,686 shares of Common Stock outstanding as of April 29, 2026. 0002091724 N R01 Capital Manager LLC a WC N DE 0.00 22152695.00 0.00 22152695.00 22152695.00 N 44.5 OO This Amendment No. 4 is being filed to update the beneficial ownership of the Reporting Persons to reflect anti-dilution adjustments under certain pre-funded warrants issued by the Issuer to R01 Fund LP and other investors on October 16, 2025 (the "Pre-Funded Warrants") which, as a result of dilutive issuances of the Issuer's Common Stock during the fourth quarter of 2025, increased the aggregate number of shares of Common Stock issuable upon exercise of the Pre-Funded Warrants to 11,332,020 (on a post-reverse stock split basis). The reported securities may also be deemed to be beneficially owned by R01 Capital LLC, R01 Capital Manager LLC and Michael Kazley, each of which or whom disclaims beneficial ownership of such shares, except to the extent of its or his pecuniary interest therein. All percentage calculations set forth herein are based on the aggregate of 49,779,686 shares of Common Stock outstanding as of April 29, 2026. 0002091727 N Kazley Michael John a WC N DE 0.00 22152695.00 4118828.00 22152695.00 26271523.00 N 52.8 IN This Amendment No. 4 is being filed to update the beneficial ownership of the Reporting Persons to reflect anti-dilution adjustments under certain pre-funded warrants issued by the Issuer to R01 Fund LP and other investors on October 16, 2025 (the "Pre-Funded Warrants") which, as a result of dilutive issuances of the Issuer's Common Stock during the fourth quarter of 2025, increased the aggregate number of shares of Common Stock issuable upon exercise of the Pre-Funded Warrants to 11,332,020 (on a post-reverse stock split basis). The reported securities may also be deemed to be beneficially owned by R01 Capital LLC, R01 Capital Manager LLC and Michael Kazley, each of which or whom disclaims beneficial ownership of such shares, except to the extent of its or his pecuniary interest therein. All percentage calculations set forth herein are based on the aggregate of 49,779,686 shares of Common Stock outstanding as of April 29, 2026. Common Stock, $0.01 par value Stablecoin Development Corp 2000 POWELL STREET SUITE 1150 EMERYVILLE CA 94608 Explanatory Note: This Amendment No. 4 amends and supplements the statement on Schedule 13D originally filed with the Securities and Exchange Commission (the "SEC") on October 15, 2025, as amended and supplemented by that certain Amendment No. 1 to Schedule 13D filed on October 25, 2025, as amended and supplemented by that certain Amendment No. 2 to Schedule 13D filed on January 20, 2026, and as amended and supplement by that certain Amendment No. 3 to Schedule 13D filed on April 2, 2026 (as amended, the "Statement") by R01 Fund LP ("R01") with respect to the Common Stock of Stablecoin Development Corporation (f/k/a NovaBay Pharmaceuticals, Inc.) (the "Company"). This Amendment No. 4 is being filed to update the beneficial ownership of the Reporting Persons to reflect anti-dilution adjustments under certain pre-funded warrants issued by the Issuer to R01 Fund LP and other investors on October 16, 2025 (the "Pre-Funded Warrants") which, as a result of dilutive issuances of the Issuer's Common Stock during the fourth quarter of 2025, increased the aggregate number of shares of Common Stock issuable upon exercise of the Pre-Funded Warrants to 11,332,020 (on a post-reverse stock split basis). Unless otherwise defined herein, capitalized terms used in this Amendment No. 4 shall have the meanings ascribed to them in the Statement. Unless amended or otherwise stated below, the information for R01 in the Statement remains unchanged. R01 Fund LP, R01 Capital LLC and R01 Capital Manager LLC beneficially own an aggregate of 22,152,695.00 shares of Common Stock (the "R01 Shares"). The R01 Shares represent approximately 44.5% of the outstanding shares of Common Stock, based on the aggregate of 49,779,686 shares of Common Stock outstanding as of April 29, 2026. Michael Kazley beneficially owns an aggregate of 26,271,523.00 shares of Common Stock (the "Kazley Shares", and together with the R01 Shares, the "Subject Shares"). The Kazley Shares represent approximately 52.8% of the outstanding shares of Common Stock, based on the aggregate of 49,779,686 shares of Common Stock outstanding as of April 29, 2026. 1. Sole power to vote or direct vote: R01 Fund LP, R01 Capital LLC and R01 Capital Manager LLC: 0 Shares of Common Stock Michael Kazley: 0 shares of Common Stock 2. Shared power to vote or direct vote: R01 Fund LP, R01 Capital LLC and R01 Capital Manager LLC: 22,152,695.00 shares of Common Stock Michael Kazley: 22,152,695.00 shares of Common Stock 3. Sole power to dispose or direct the disposition: R01 Fund LP, R01 Capital LLC and R01 Capital Manager LLC: 0 Shares of Common Stock Michael Kazley: 4,118,828 shares of Common Stock 4. Shared power to dispose or direct the disposition: R01 Fund LP, R01 Capital LLC and R01 Capital Manager LLC: 22,152,695.00 shares of Common Stock Michael Kazley: 22,152,695.00 shares of Common Stock Except as described in this Schedule 13D, none of the Reporting Persons have effected any transaction in the shares of Common Stock during the past 60 days. No person other than the Reporting Persons is known to have the right to receive, or the power to direct the receipt of dividends from, or proceeds from the sale of, the Subject Shares. Not applicable. R01 Fund LP /s/ Michael Kazley 04/30/2026 R01 Capital LLC /s/ Michael Kazley 04/30/2026 R01 Capital Manager LLC /s/ Michael Kazley 04/30/2026 Kazley Michael John /s/ Michael Kazley 04/30/2026