Top 6 Most Influential People in 2013

No. 3: David Einhorn

Hedge Fund Manager, 44

Although it has been a particular active year for hedge funders, none has caught the headlines as much as Mr. Einhorn, president of Greenlight Capital. He made waves when he proposed Apple Inc. (NASDAQ:AAPL). Give back some of its billions to investors, such as him.This moment marked a milestone in shareholder activism. Since then, countless investors have pushed firms with huge balance sheet to return some of the money, as well as change the very way they do business.