McKesson Corporation, the largest company in the healthcare sector, is poised for growth as it embarks on a significant joint venture with HCA Healthcare, owning 51% of the new partnership. This move comes as the company benefits from the gradual return to normalization in medical treatments, with revenues reaching $238.2 billion for fiscal year 2021. Favored by investors like Warren Buffett, McKesson's strong market position and diversified services aim to enhance healthcare accessibility and affordability.