You can find original article here Nrn. Subscribe to our free daily Nrn newsletter. Black Rock Coffee Bar Inc., the 158-unit Scottsdale, Ariz.-based drive-thru coffee chain, raised $294.1 million in its U.S. initial public offering. In its first day of trading Friday on the Nasdaq stock exchange, the 1.3 million shares closed at$27.53, about 38% above their opening price of $20 a share. As Black Rock Coffee prepared to go public, the company reported in Securities and Exchange Commission filings that i ...