The biggest business feuds of 2013

What goes around comes around, at least in 2013. This year has been one of contentious deals, big tech smack-talking, and investor name-calling. A look at the highlights, the lowlights, and how it all ties together.

Carl Icahn vs. Bill Ackman

2013 fueds icahn ackman

In January, Carl Icahn and Bill Ackman went on CNBC supposedly to debate Herbalife (HLF). Instead, Icahn spent half an hour calling Ackman a "crybaby," a "major loser," and either "the most sanctimonious guy I met in my life or just arrogant." Ackman said Icahn was dishonest.

Much of the TV smackdown was about a deal the two did together a few years ago that ended up going to court with Ackman winning. But the two continued to fight over Herbalife for the rest of the year. Ackman says the nutritional supplements company is a fraud. Icahn says it has a future, but admits he bought shares in the company in part just to get back at Ackman, which has worked. Herbalife's shares have soared this year, costing Ackman and his investors $500 million.

  @FortuneMagazine - Last updated December 31 2013 12:34 AM ET
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