X0202 SCHEDULE 13D/A 0001763409-26-000001 0001763409 XXXXXXXX LIVE 1 Class A Common Stock, par value $0.00001 per share 05/15/2026 false 0002068577 092244102 Black Rock Coffee Bar, Inc.

9170 E. BAHIA DRIVE, SUITE 101 SCOTTSDALE AZ 85260

Emily M. Teran 801-521-3100 c/o Cynosure Group, LLC 111 S. Main Street, Suite 2350 Salt Lake City UT 84111 0001763409 N Cynosure Group, LLC OO N UT 0.00 21831316.00 0.00 21831316.00 21831316.00 N 52.6 IA The number in Rows (8), (10) and (11) consists of (a) 2,035,904 shares of Class A Common Stock, comprised of (i) 1,916,012 shares of Class A Common Stock held by Cynosure Partners III Offshore, LP and (ii) 119,892 shares of Class A Common Stock held by Cynosure Partners III, LP and (b) 19,795,412 shares of Class A Common Stock issuable upon the conversion of an equal number of limited liability company units ("LLC Units") of Black Rock Coffee Holdings, LLC, a Delaware limited liability company and subsidiary of the Issuer, on a one-for-one basis, and forfeiture of a corresponding number of shares of Class B Common Stock, comprised of (i) 3,514,041 shares of Class B Common Stock held by Cynosure Partners 2020, LP, (ii) 260,660 shares of Class B Common Stock held by Cynosure Partners 2020 PV, LP, (iii) 660,106 shares of Class B Common Stock held by Cynosure Partners 2020 Co-Investment, LLC (for and on behalf of Series A members), (iv) 1,247,093 shares of Class B Common Stock held by Cynosure Partners 2020 Co-Investment, LLC (for and on behalf of Series B members), and (v) 14,113,512 shares of Class B Common Stock held by Cynosure Partners III, LP. The Cynosure Group, LLC, is the manager for, and has sole voting and investment power with respect to, the shares of Class A and Class B Common Stock held by the Reporting Persons. The percentage in Row (13) is calculated assuming 21,692,785 shares of Class A common stock outstanding plus 19,795,412 shares of Class A common stock issuable in respect of an equivalent number of LLC Units and shares of Class B Common Stock held by the Reporting Persons. 0001826569 N Cynosure Partners 2020, LP OO N DE 0.00 3514041.00 0.00 3514041.00 3514041.00 N 13.9 PN The percentage in Row (13) is calculated assuming 21,692,785 shares of Class A Common Stock outstanding plus 3,514,041 shares of Class A common stock issuable in respect of an equivalent number of LLC Units and shares of Class B Common Stock held by Cynosure Partners 2020, LP. 0001840055 N Cynosure Partners 2020 PV, LP OO N DE 0.00 260660.00 0.00 260660.00 260660.00 N 1.2 PN The percentage in Row (13) is calculated assuming 21,692,785 shares of Class A Common Stock outstanding plus 260,660 shares of Class A common stock issuable in respect of an equivalent number of LLC Units and shares of Class B Common Stock held by Cynosure Partners 2020 PV, LP. N Cynosure Partners 2020 Co-investment, LLC (for and on behalf of Series A members) OO N DE 0.00 660106.00 0.00 660106.00 660106.00 N 3.0 OO The percentage in Row (13) is calculated assuming 21,692,785 shares of Class A Common Stock outstanding plus 660,106 shares of Class A common stock issuable in respect of an equivalent number of LLC Units and shares of Class B Common Stock held by Cynosure Partners 2020 Co-Investment, LLC for and on behalf of Series A members. N Cynosure Partners 2020 Co-Investment, LLC (for and on behalf of Series B members) OO N DE 0.00 1247093.00 0.00 1247093.00 1247093.00 N 5.4 OO The percentage in Row (13) is calculated assuming 21,692,785 shares of Class A Common Stock outstanding plus 1,247,093 shares of Class A common stock issuable in respect of an equivalent number of LLC Units and shares of Class B Common Stock held by Cynosure Partners 2020 Co-Investment, LLC for and on behalf of Series B members. 0001951018 N Cynosure Partners III, LP OO N DE 0.00 14233404.00 0.00 14233404.00 14233404.00 N 39.8 PN The percentage in Row (13) is calculated assuming 21,692,785 shares of Class A Common Stock outstanding plus 14,113,512 shares of Class A Common Stock issuable in respect of an equivalent number of LLC Units and shares of Class B Common Stock held by Cynosure Partners III, LP. 0002050077 N Cynosure Partners III Offshore, LP OO N E9 0.00 1916012.00 0.00 1916012.00 1916012.00 N 8.8 PN The percentage in Row (13) is calculated assuming 21,692,785 shares of Class A Common Stock outstanding. Class A Common Stock, par value $0.00001 per share Black Rock Coffee Bar, Inc. 9170 E. BAHIA DRIVE, SUITE 101 SCOTTSDALE AZ 85260 Explanatory Note: This Amendment to the Schedule 13D amends the initial Schedule 13D filed with the Securities and Exchange Commission on May 21, 2026 (the "Initial Filing") to correct a calculation error and add conformed signatures to the Joint Filing Agreement previously filed as an exhibit to the Initial Filing. No other content of the Initial Filing has been changed. Cynosure Group, LLC /s/ Andrew Braithwaite 05/22/2026 Cynosure Partners 2020, LP /s/ Andrew Braithwaite 05/22/2026 Cynosure Partners 2020 PV, LP /s/ Andrew Braithwaite 05/22/2026 Cynosure Partners 2020 Co-investment, LLC (for and on behalf of Series A members) /s/ Andrew Braithwaite 05/22/2026 Cynosure Partners 2020 Co-Investment, LLC (for and on behalf of Series B members) /s/ Andrew Braithwaite 05/22/2026 Cynosure Partners III, LP /s/ Andrew Braithwaite 05/22/2026 Cynosure Partners III Offshore, LP /s/ Andrew Braithwaite 05/22/2026