Cynosure Group Corrects Calculation Error, Reporting 52.6% Stake in Black Rock Coffee Bar

On May 22, 2026, Cynosure Group, LLC filed an amended Schedule 13D (Amendment No. 1) regarding its holdings in Black Rock Coffee Bar, Inc. (BRCB). The filing serves as a corrective update to an initial submission from May 21, 2026, primarily to rectify a calculation error and provide conformed signatures for the Joint Filing Agreement. Cynosure Group, LLC, acting as the manager for several affiliated entities—including Cynosure Partners III, LP and Cynosure Partners 2020, LP—reports beneficial ownership of 21,831,316 shares of Class A Common Stock. This position represents approximately 52.6% of the class. The total share count includes 2,035,904 shares of Class A Common Stock held directly and 19,795,412 shares issuable upon the conversion of LLC Units in Black Rock Coffee Holdings, LLC, paired with the forfeiture of an equivalent number of Class B Common Stock shares. The reporting persons maintain shared voting and dispositive power over these securities. No other material changes to the initial filing were reported.