Ackman: After HLF, I'm done with 'public shorts'

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Herbalife... we're doing God's work: Bill Ackman

Wall Street may not have Bill Ackman to kick around anymore.

At least, more specifically, the Street likely won't be able to roast the high-profile activist investor for his highly publicized bets against companies.

Following a three-year period in which Ackman has had to defend his aggressive short against Herbalife—a battle that has featured not only high-pitched fights against the firm itself but also an epic slugfest against fellow activist Carl Icahn live on CNBC—he said this part of his career is probably over.

The head of $18.3 billion Pershing Square Capital Management, appearing Wednesday morning on CNBC, responded with an ominous declaration to a question about whether he has a new short in his portfolio .