Some of the names on the move ahead of the open.
Activist investors are back. A whole new generation of cage-rattlers are taking on some of the world's biggest corporations.
Cramer likes to dig down into the market. And beneath the surface he’s found something intriguing.
Ackman's Pershing Square is largely flat for the year after a bruising August in which the hedge fund lost 3.6 percent, according to sources.
Check out which companies are making headlines after the bell Tuesday:
Hedge fund heavyweight Bill Ackman acknowledged in a letter to clients that he has made a few blunders this year, but still believes in his bet against Herbalife.
Shares of Herbalife are spiking on news another hedge fund has taken a long position on the nutritional supplement marketer.
CNBC's Scott Wapner says the hedge fund has added to its position over the past six weeks. According to sources the firm believes the stock is cheap and not a "pyramid scheme," reports CNBC's Dominic Chu.
Billionaire investor George Soros has been busy stocking up on hedge fund favorites as he joined others in dumping gold exchange traded fund (ETF) holdings in the second quarter.
With the stock market in a summer lull, Wall Street's activist investors are looking downright hyperactive.
Billionaire investor William Ackman has been tripped up by a bet that he could transform a giant retailer.
CNBC's Herb Greenberg digs into news over some alleged safety concerns at Herbalife. The New York Times reports a NY Attorney has subpoenaed a former Herbalife employee for plant documents.
Billionaire investor Carl Icahn revealed on Twitter that he's taken a "large position" in Apple.
New scrutiny of Herbalife over quality-control issues doesn't change much, Stephen Weiss of Short Hills Capital says.
How Herbalife responded to product safety issues are drawing scrutiny in part because of the hedge fund battle over the stock.
In light of revelations that Herbalife is receiving new scrutiny over quality control issues, the "Fast Money" traders weigh in on the stock.
CNBC's Andrew Ross Sorkin reports on a new food safety "wrinkle" in the Herbalife drama. The FMHR traders debate the stock.
Bill Ackman seems to have more than his fair share of enemies. And Cramer thinks they’re about to gang up on him.
Carl Icahn looks like he's up to something, and he could be using Twitter to tell the public what it is.
In the latest salvo in the feud among the hedge fund industry's biggest players, Dan Loeb has offered up a thinly veiled jab against archenemy Bill Ackman.