Quiz - I'd guess either Koch or Cargill, depending on which is growing faster, probably Koch. Actually, the most profitable private corporation in the world by far is the US Federal Reserve System. I remember 10-15 years ago on Wall St Week, Louis Rukeyser said that the privately owned Fed had profits of $30 billion that year (representing the biggest ripoff in history, but that's another story). The profits are distributed to the many member banks.
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