Revenue that exceeds the GDP of nations.
Walmart = $566 billion. Good enough for #25 among nations, larger than Nigeria or Thailand, just below Belgium and Poland.
Amazon = $443 billion. Equal to #30 among nations. Nearly identical to Israel or Norway, and ahead of the Philippines or Egypt.
Berkshire Hathaway = $365 billion. Equal to #40 among nations. Comparable to Singapore or Vietnam, just below Denmark.
Apple = $347 billion. Equal to #41 among nations. Larger than Pakistan, Finland, Chile and just below Bangladesh.
CVS = $278 billion. Equal to #48 among nations. Comparable to Czechia and larger than Portugal, New Zealand.
UnitedHeath = $270 billion. Equal to #49 among nations. Just below Romania or Colombia.
Google = $220 billion. Equal to #52 among nations. Comparable to Greece or Peru.
Microsoft = $168 billion. Equal to #56 among nations. Just below Hungary or Kazakhstan, ahead of Ukraine or Algeria.
Also keep in mind that revenue is not market value nor is it wealth/net worth.