McKesson Corporation (NYSE:MCK) is included among the 10 Best Large Cap Dividend Growth Stocks to Invest in. William Blair Starts McKesson (MCK) at Outperform, Sees Durable Competitive Moat On April 28, William Blair initiated coverage of McKesson Corporation (NYSE:MCK) with an Outperform rating. The company has a “durable competitive moat” with specialty-led growth upside, the analyst tells investors in a research note. The firm believes McKesson is well-positioned to benefit from a favorable demand bac ...