The first place to look for an explanation is mistakes we made in 2015, and we did make some import…

Barbarian Capital - a top slot follow on Finance Twitter - did some close reading on what seem…

Pershing's portfolio includes positions in Valeant, Actavis, Zoetis, Restaurant Brands (Burger King…

Ackman's only short is Herbalife, a multi-level marketing company that sells weight loss shakes. Ac…

Another holding, the Howard Hughes Corporation, has fallen more than 19% this year. Pershing Square…

We believe that it is axiomatic that while capital flows will drive market values in the short term…

The SEC is still investigating whether Ackman and Valeant violated insider-trading rules when they …

1. On Tuesday morning we got inflation data from the producer price index, which showed that prices…

"While our portfolio is highly concentrated, we are highly diversified in the industries in which w…

Without any major US economic data and no S&P 500 companies reporting earnings, the news-starve…

STIGLITZ: Italy could be the 'cataclysmic event' that leads to the fall of the eurozone - Europe is…

Fed Vice Chair Stanley Fischer says the Fed is nearing its targets. Speaking at a conference in Asp…

In part due to student demand, schools such as Columbia University's Business School are inviting m…

The Pershing Square L.P. fund fell -16.2% last year after posting 36.9% gains the year before, acco…

If the deal makes its way past shareholders and regulators, and if it doesn't run into too much tro…

He believes that the company is operating as a "pyramid scheme" that targets poor people. It's his …

Ackman has lost more than $1.9 billion on paper after Citron Research, a short-selling firm led by …

In March, Valeant's stock got hit hard after the company reported fourth-quarter earnings results t…

Ackman said in an investor update: "However there has been significant volatility in the investment…

The lowered revenue guidance adds to a tough run for Valeant, which has been sliding since late 201…