10 largest companies in the US by annual revenue
1 Walmart $500bn
2 Exxon Mobil $244bn
3 Berkshire Hathaway $242bn
4 Apple $229bn
5 UnitedHealth $201bn
6 McKesson $199bn
7 CVS $185bn
8 Amazon $178bn (first time in top 10)
9 AT&T $161bn
10 General Motors $157bn
Fortune 500, 2018