SAN FRANCISCO--(BUSINESS WIRE)--McKesson Corporation (NYSE:MCK) received notice of an unsolicited “mini-tender” offer by TRC Capital Corporation (TRC Capital) to purchase up to 1 million shares of McKesson’s common stock at a price of $182.00 per share in cash. The offering price is 4.5 percent below the closing price per share of McKesson’s common stock on December 14, 2015, the last trading day before the commencement of the offer. The offer is for approximately 0.43 percent of the outstanding shares of McKesson’s common stock as of September 30, 2015.