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The 10 Biggest Companies You’ve Never Heard Of

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Companies You’ve Never Heard Of: McKesson (MCK)

Companies You've Never Heard Of: McKesson (MCK)
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Yes, McKesson Corporation (NYSE:MCK) is the number five company in the Fortune 500 – even though few of us have even heard its name. But it’s not just McKesson’s size that makes it important.

McKesson describes itself as both the oldest and the largest healthcare company in the U.S. The company distributes roughly one-third of all prescription drugs in the United States. It also supplies doctors and hospitals with supplies such as bandages, thermometers and exam tables (plus the paper on those tables that is so comfortable to sit on).

The company even has a large technology division that provides key data and improves communication among doctors, health insurance companies and patients.

McKesson is a vital part of the U.S. health care system, and critical to the health, and very lives, of millions of Americans. Yet, outside of its HealthMart pharmacy brand, few of those Americans likely know it even exists.

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