SAN FRANCISCO--(BUSINESS WIRE)--McKesson Corporation (NYSE: MCK) today reported that revenues for the first quarter ended June 30, 2012 were $30.8 billion, up 3% compared to $30.0 billion a year ago. On the basis of U.S. generally accepted accounting principles (“GAAP”), first-quarter earnings per diluted share was $1.58 compared to $1.13 a year ago.
