The divide between billionaire investors Carl Icahn and William Ackman is getting deeper.
A regulatory filing Thursday shows that Icahn holds a 12.98 percent stake in nutritional supplement distributor Herbalife Inc.
Herbalife is one of the companies that is part of a long-running feud between the two activist investors that led to a shouting match on live television last month.
Hedge fund manager Ackman has said he believes Herbalife is pyramid scheme and he took a short position in the stock. Icahn has previously refused to comment on whether he held a position in the company but many speculated he bought a stake in a bet against his old adversary.