Wall Street’s Most Feared Activist Investor Is Changing His Game After Shaking Up Twitter, AT&T And Samsung

<p>Once, it would have been a rare instance of hedge fund Elliott Management taking a majority stake in a company rather than maintaining a smaller activist position. But the firm, led by founder and billionaire Paul Singer, is pushing aggressively into the world of buyouts. And Athenahealth is its biggest success yet. </p>