X0202 SCHEDULE 13D/A 0001829126-25-008155 0002028474 XXXXXXXX LIVE 4 Common Stock, $0.01 par value 05/17/2026 false 0001389545 66987P508 Stablecoin Development Corp

2000 POWELL STREET, SUITE 1150 EMERYVILLE CA 94608

FRAMEWORK VENTURES IV L.P. 628-233-0357 600 Montgomery Street, Floor 42 San Francisco CA 94111 0002028474 N Framework Ventures IV L.P. a WC N DE 0.00 32715086.00 0.00 32715086.00 32715086.00 N 46.4 PN This Amendment No. 4 is being filed to update the beneficial ownership of the Reporting Persons to reflect the vesting of pre-funded warrants to purchase 10,021,850 shares, representing 20% of the total number of shares issuable upon exercise of the pre-funded warrants issued by the Issuer to Framework Ventures IV L.P. and other investors on January 16, 2026 (the "Pre-Funded Warrants"). The percentage calculation set forth above is based on 27,115,646 shares of Common Stock outstanding as of May 17, 2026 and also contemplates the vesting of 10,735,994 shares of Common Stock underlying pre-funded warrants issued by the Issuer to R01 Fund LP, R01 Capital LLC, R01 Capital Manager LLC and Michael Kazley, each of which or whom may also be deemed to beneficially own the shares held by Framework Ventures IV L.P., Framework Ventures IV GP LLC, Framework Ventures Management LLC, Vance Spencer and Michael Ernest Anderson for purposes of Rule 13d-3 under the Exchange Act. Each of the foregoing parties disclaims beneficial ownership of such shares, except to the extent of its or his pecuniary interest therein. N Framework Ventures Management LLC a WC N DE 0.00 32715086.00 0.00 32715086.00 32715086.00 N 46.4 OO This Amendment No. 4 is being filed to update the beneficial ownership of the Reporting Persons to reflect the vesting of pre-funded warrants to purchase 10,021,850 shares, representing 20% of the total number of shares issuable upon the exercise of pre-funded warrants issued by the Issuer to Framework Ventures IV L.P. and other investors on January 16, 2026 (the "Pre-Funded Warrants"). The percentage calculation set forth above is based on 27,115,646 shares of Common Stock outstanding as of May 17, 2026 and also contemplates the vesting of 10,735,994 shares of Common Stock underlying pre-funded warrants issued by the Issuer to R01 Fund LP, R01 Capital LLC, R01 Capital Manager LLC and Michael Kazley, each of which or whom may also be deemed to beneficially own the shares held by Framework Ventures IV L.P., Framework Ventures IV GP LLC, Framework Ventures Management LLC, Vance Spencer and Michael Ernest Anderson for purposes of Rule 13d-3 under the Exchange Act. Each of the foregoing parties disclaims beneficial ownership of such shares, except to the extent of its or his pecuniary interest therein. N Framework Ventures IV GP LLC a WC N DE 0.00 32715086.00 0.00 32715086.00 32715086.00 N 46.4 OO This Amendment No. 4 is being filed to update the beneficial ownership of the Reporting Persons to reflect the vesting of pre-funded warrants to purchase 10,021,850 shares, representing 20% of the total number of shares issuable upon exercise of the pre-funded warrants issued by the Issuer to Framework Ventures IV L.P. and other investors on January 16, 2026 (the "Pre-Funded Warrants"). The percentage calculation set forth above is based on 27,115,646 shares of Common Stock outstanding as of May 17, 2026 and also contemplates the vesting of 10,735,994 shares of Common Stock underlying pre-funded warrants issued by the Issuer to R01 Fund LP, R01 Capital LLC, R01 Capital Manager LLC and Michael Kazley, each of which or whom may also be deemed to beneficially own the shares held by Framework Ventures IV L.P., Framework Ventures IV GP LLC, Framework Ventures Management LLC, Vance Spencer and Michael Ernest Anderson for purposes of Rule 13d-3 under the Exchange Act. Each of the foregoing parties disclaims beneficial ownership of such shares, except to the extent of its or his pecuniary interest therein. N Vance Spencer a WC N DE 0.00 32715086.00 0.00 32715086.00 32715086.00 N 46.4 IN This Amendment No. 4 is being filed to update the beneficial ownership of the Reporting Persons to reflect the vesting of pre-funded warrants to purchase 10,021,850 shares, representing 20% of the total number of shares issuable upon exercise of the pre-funded warrants issued by the Issuer to Framework Ventures IV L.P. and other investors on January 16, 2026 (the "Pre-Funded Warrants"). The percentage calculation set forth above is based on 27,115,646 shares of Common Stock outstanding as of May 17, 2026 and also contemplates the vesting of 10,735,994 shares of Common Stock underlying pre-funded warrants issued by the Issuer to R01 Fund LP, R01 Capital LLC, R01 Capital Manager LLC and Michael Kazley, each of which or whom may also be deemed to beneficially own the shares held by Framework Ventures IV L.P., Framework Ventures IV GP LLC, Framework Ventures Management LLC, Vance Spencer and Michael Ernest Anderson for purposes of Rule 13d-3 under the Exchange Act. Each of the foregoing parties disclaims beneficial ownership of such shares, except to the extent of its or his pecuniary interest therein. N Michael Ernest Anderson a WC N DE 0.00 32715086.00 0.00 32715086.00 32715086.00 N 46.4 IN This Amendment No. 4 is being filed to update the beneficial ownership of the Reporting Persons to reflect the vesting of pre-funded warrants to purchase 10,021,850 shares, representing 20% of the total number of shares issuable upon exercise of the pre-funded warrants issued by the Issuer to Framework Ventures IV L.P. and other investors on January 16, 2026 (the "Pre-Funded Warrants"). The percentage calculation set forth above is based on 27,115,646 shares of Common Stock outstanding as of May 17, 2026 and also contemplates the vesting of 10,735,994 shares of Common Stock underlying pre-funded warrants issued by the Issuer to R01 Fund LP, R01 Capital LLC, R01 Capital Manager LLC and Michael Kazley, each of which or whom may also be deemed to beneficially own the shares held by Framework Ventures IV L.P., Framework Ventures IV GP LLC, Framework Ventures Management LLC, Vance Spencer and Michael Ernest Anderson for purposes of Rule 13d-3 under the Exchange Act. Each of the foregoing parties disclaims beneficial ownership of such shares, except to the extent of its or his pecuniary interest therein. 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 21, 2026, and as amended and supplemented by that certain Amendment No. 3 to Schedule 13D filed on April 30, 2026 (as amended, the "Statement") by Framework Ventures IV L.P. ("Framework") with respect to the Common Stock of Stablecoin Development Corporation (the "Company"). This Amendment No. 4 is being filed to update the beneficial ownership of the Reporting Persons to reflect the vesting of pre-funded warrants to purchase 10,021,850 shares of Common Stock, representing 20% of the total number of shares of Common Stock issuable upon exercise of the pre-funded warrants issued by the Issuer to Framework Ventures IV L.P. on January 16, 2026 (the "Pre-Funded Warrants"). 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 Framework in the Statement remains unchanged. The Reporting Persons beneficially own an aggregate of 32,715,086.00 shares of Common Stock (the "Subject Shares"). The Subject Shares represent approximately 46.4% of the outstanding shares of Common Stock. This percentage calculation is based on 27,115,646 shares of Common Stock outstanding as of May 17, 2026 and also contemplates the vesting of pre-funded warrants to purchase 10,735,994 shares of Common Stock issued by the Issuer to R01 Fund LP, R01 Capital LLC, R01 Capital Manager LLC and Michael Kazley, each of which or whom may also be deemed to beneficially own the shares held by the Reporting Persons for the purposes of Rule 13d-3 under the Exchange Act. 1. Sole power to vote or direct vote: 0.00 2. Shared power to vote or direct vote: 32,715,086.00 shares of Common Stock 3. Sole power to dispose or direct the disposition: 0.00 4. Shared power to dispose or direct the disposition: 32,715,086.00 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. Framework Ventures IV L.P. /s/ Michael Ernest Anderson 05/19/2026 Framework Ventures Management LLC /s/ Michael Ernest Anderson 05/19/2026 Framework Ventures IV GP LLC /s/ Michael Ernest Anderson 05/19/2026 Vance Spencer /s/ Vance Spencer 05/19/2026 Michael Ernest Anderson /s/ Michael Ernest Anderson 05/19/2026