Activist investor Bill Ackman, the CEO of $20 billion Pershing Square Capital, now owns a $3.3 billion stake in Valeant Pharmaceuticals, Reuters' Svea Herbst-Bayliss reports citing an unnamed source.

Nearly two dozen mutual and hedge fund managers came to dine and brainstorm on Valeant, according to the source, who was not at liberty to speak publicly about it. While Ackman had things to say ...

Billionaire hedge fund manager Bill Ackman owns just one AI stock, and it's a member of the "Magnificent Seven." ...

Bill Ackman is planning to take his investment firm ... He suffered a losing streak between 2015 and 2017 when big bets on ...

The move: Howard Hughes Holdings shares surged in the last hour of trading on Tuesday after the billionaire investor Bill Ackman ... stake in Valeant Pharmaceuticals International, Ackman likened ...

Because of his long-term track record, retail investors closely follow the moves of Bill Ackman. The billionaire hedge fund manager runs Pershing Square Capital Management, which managed $12.6 ...

Bill Ackman is betting against the Hong Kong ... to rise until he eventually had to liquidate his position in 2017. 4. Valeant Pharmaceuticals, 2014 Pershing Square acquired 8.5% of Valeant ...

Hedge fund manager Bill Ackman called Warren Buffett’s investment strategy too conservative and claimed Berkshire Hathaway’s businesses would likely run better under the next chief executive.

Bill Ackman’s bid for Howard Hughes is ambitious ... Even if you include the Herbalife and Valeant losses. As good as Pershing Square may be at investing, they have never operated businesses.