X0609 4 2026-05-15 0002068577 Black Rock Coffee Bar, Inc. BRCB 0001763409 Cynosure Group, LLC false 111 S. MAIN STREET, SUITE 2350 SALT LAKE CITY UT 84111 true false true false 0001826569 Cynosure Partners 2020, LP false 111 S. MAIN STREET, SUITE 2350 SALT LAKE CITY UT 84111 true false true false 0001840055 Cynosure Partners 2020 PV, LP false 111 S. MAIN STREET, SUITE 2350 SALT LAKE CITY UT 84111 true false true false 0001844090 Cynosure Partners 2020 Co-investment, LLC false 111 S. MAIN STREET, SUITE 2350 SALT LAKE CITY UT 84111 true false true false 0001951018 Cynosure Partners III, LP false 111 S. MAIN STREET, SUITE 2350 SALT LAKE CITY UT 84111 true false true false 0002050077 Cynosure Partners III Offshore, LP false 111 S. MAIN STREET, SUITE 2350 SALT LAKE CITY UT 84111 true false true false 0 Class B Common Stock 2026-05-15 4 P false 12042712 5.35 A 19915304 I See footnote Class A Common Stock 2026-05-15 4 P false 1600000 5.35 A 1916012 I See footnote Class B Common Stock 2026-05-15 4 J false 119892 D 19795412 I See footnote Class A Common Stock 2026-05-15 4 C false 119892 A 2035904 I See footnote LLC Units 2026-05-15 4 P false 12042712 A Class A Common Stock 12042712 19915304 I See footnote LLC Units 2026-05-15 4 C false 119892 D Class A Common Stock 119892 19795412 I See footnote Consists 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 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 Series B members), and (v) 14,233,404 shares (or 14,113,512 shares, after giving effect to the transaction described in (3) below) 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 B Common Stock held by each of these entities. Each of the Reporting Persons disclaims beneficial ownership of the securities of the Issuer held directly by any of the other Reporting Persons except to the extent of their pecuniary interest therein. Consists of (i) 1,916,012 shares of Class A Common Stock held by Cynosure Partners III Offshore, LP and, after giving effect to the transaction described in (4) below, (ii) 119,892 shares of Class A 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 Common Stock held by each of these entities. Each of the Reporting Persons disclaims beneficial ownership of the securities of the Issuer held directly by any of the other Reporting Persons except to the extent of their pecuniary interest therein. Reflects the cancellation for no consideration of Class B Common Stock in connection with the conversion of LLC Units. Reflects the conversion of 119,892 LLC Units into Class A Common Stock on a 1-to-1 basis. The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date. Each of the Reporting Persons may be deemed to be a director-by-deputization of the Issuer solely for purposes of Section 16 of the Securities Exchange Act of 1934 by virtue of The Cynosure Group, LLC's current right to nominate an individual to serve on the board of directors of the Issuer (the "Board"), and under which Andrew Braithwaite, a Managing Director of The Cynosure Group, LLC, serves on the Board. /s/ Andrew Braithwaite, Authorized Signatory 2026-05-19 /s/ Andrew Braithwaite, Authorized Signatory 2026-05-19 /s/ Andrew Braithwaite, Authorized Signatory 2026-05-19 /s/ Andrew Braithwaite, Authorized Signatory 2026-05-19 /s/ Andrew Braithwaite, Authorized Signatory 2026-05-19 /s/ Andrew Braithwaite, Authorized Signatory 2026-05-19