Form 4 Filing for Black Rock Coffee Bar, Inc.

This filing details a significant transaction by former 10% owners, Viking Cake BR, LLC and Viking Cake Fuel, LLC, on May 15, 2026. They disposed of 5,809,391 LLC Units and an equal number of Class C Common Stock shares. These LLC Units represent membership units of Black Rock OpCo and are convertible into Class A Common Stock, with the Class C Common Stock also convertible into Class A Common Stock on a one-for-one basis. The transaction price was based on a Margin Loan Agreement with JPMorgan Chase Bank, N.A., with a total aggregate purchase price of $41,698,806.43. Following these transactions, the reporting owners hold zero shares. The Class C Common Stock is subject to automatic conversion under certain conditions, including a specific date or a reduction in holdings by co-founders. The filing indicates these transactions were not subject to Section 16.