Bill Ackman’s massive $224 million bet on Chipotle Mexican Grill, Inc. (NYSE: CMG) may be down 33 percent in a little over a year, but Ackman’s most recent letter to Pershing Square investors assured them everything is going according to plan.

Bill Ackman is done talking about Herbalife Ltd. (NYSE: HLF).

Bill Ackman is as bullish as ever on Federal National Mortgage Association (OTC: FNMA) and Federal Home Loan Mortgage Corp (OTC: FMCC), but the two stocks' trading action this year suggests the market isn’t

The latest round of 13-F filings from institutional investors is out, revealing to the world the stocks that some of the richest and most successful investors have been buying and selling.

Bill Ackman's proxy battle against Automatic Data Processing (NASDAQ: ADP) didn't end well for the activist investor.

Activist hedge fund manager Bill Ackman was dealt another blow this week when he came out on the losing side of a proxy battle to place three Pershing Square representatives on the board of Automatic Data Processing (NASDAQ: ADP

Bill Ackman spoke on CNBC's "Fast Money Halftime Report" about Herbalife Ltd. (NYSE: HLF) and his recently restructured position, which he said now exists entirely in puts.

Bill Ackman said Monday that Chipotle Mexican Grill, Inc. (NYSE: CMG) is imminently fixable and he's hoping the company is going to recover.

Billionaire investor Bill Ackman's activist campaign against Automatic Data Processing (NASDAQ: ADP) has been well publicized and at times not so friendly.

Chipotle Mexican Grill, Inc. (NYSE: CMG) is again on the verge of a major technical breakdown.

Bill Ackman is facing some criticism for his activist campaign against Automatic Data Processing (NASDAQ: ADP) but true to his form, the billionaire isn't backing away from his thesis.

Billionaire activist investor Nelson Peltz thinks Procter & Gamble Co (NYSE: PG)'s current business strategy is flawed, and he has the answers.

This week, Pershing Square Capital’s Bill Ackman doubled down on his calls for change at Automatic Data Processing (NASDAQ: ADP), outlining a number of things he believes the company could do to unlock shareholder value.

Billionaire investor Bill Ackman's activist campaign against Automatic Data Processing (NASDAQ: ADP) is turning nasty, the company's CEO Carlos Rodriguez explained to CNBC's Jim Cramer.

Automatic Data Processing (NASDAQ: ADP) is a wildcard for investors after activist hedge fund manager Bill Ackman made the company his latest target.

Billionaire activist investor Bill Ackman made his activist case against Automatic Data Processing (NASDAQ: ADP) public

Automatic Data Processing (NASDAQ: ADP) management and investors weren’t particularly impressed by Bill Ackman’s presentation on how to improve its business on Thursday.

Activist hedge fund manager Bill Ackman once again finds himself in a battle with some of Wall Street’s heavy hitters.

Bill Ackman has been criticized as “foolish, inappropriate [and] irresponsible” for his 8-percent stake in and board nominations for Aut

Last week was big for activist investors, with Barington Capital Group and NuOrion Partners toppling Avon Products, Inc. (NYSE: AVP)’s CEO, Nelson Peltz and Bill Ackman forcing out Mondelez International Inc

Speaking on CNBC's Fast Money Halftime Report, Leon Cooperman shared his view on Bill Ackman's attempt to replace the CEO

Herbalife Ltd. (NYSE: HLF) has been one of the most controversial stocks in the market in recent years, and the company’s Q2 earnings report and conference call have presented investors with even more questions about the future of the company.

Bill Ackman may not be bothered by Chipotle Mexican Grill, Inc. (NYSE: CMG)’s latest wave of negative food safety headlines, but other Chipotle customers may not be as quick to forgive.

First tweets say a lot about a person, like what’s worth breaking silence for.

Restaurant Brands International Inc (NYSE: QSR) fell more than 1 percent Wednesday on news that Pershing Square Capital Management divested a 10 million share block.

But the sale wasn't reflective of any negative sentiment toward the company.

Joe Biden, the former vice president who once mused about beating up then-candidate Donald Trump last year, shook his fist at hedge fund trader Bill Ackman and may have even threatened to punch him out during a testy exchange at a ritzy dinner in Las Vegas, repo

Some of the largest and most successful investors in the world presented their best ideas this week at the Ira Sohn Conference in New York. In case you missed it, here’s some of the highlights from Benzinga Pro’s coverage of the event:

“Baby Buffett” may be outgrowing the endearing sobriquet.

Last week, Pershing Square CEO Bill Ackman told Bloomberg he would likely shy away from pharmaceutical companies following his