Oil States International (NYSE: OIS) rose over 15% on April 30 following the news that activist investor Barry Rosenstein’s JANA Partners owns 5 million shares of the stock (or 9.1% of the total ...

Activist investor Jana Partners has taken a stake in medical device maker Cooper Companies and will push the firm to explore ...

Barry Rosenstein’s Jana Partners, the activist hedge fund run by the New York–based firm of the same name, gained 3.3 percent in December, bringing the fund’s return for the year to 20.4 percent. Jana ...

Walgreens has appointed Barry Rosenstein, managing partner JANA Partners, and a second new director to be named to its board of directors as the company continues moving forward to complete its merger ...

NEW YORK (Reuters) - Jana Partners' founder Barry Rosenstein said on Wednesday the hedge fund regularly consults with private equity funds on investment opportunities, the latest evidence that the ...

June 29 (UPI) --President Joe Biden is hosting a major fundraiser in the Hamptons on Saturday, as he looks to quell criticism of his debate with former president Donald Trump. Biden is holding the ...