http://www.businessweek.com/news/2011-05-26/greenlight-s-ein...
> Greenlight Capital Inc. President David Einhorn called for Microsoft Corp.’s board to replace Chief Executive Officer Steve Ballmer, saying the software maker suffers from “Charlie Brown management."
Einhorn is the president of Greenlight capital, a hedge fund.
> Greenlight, a New York-based hedge fund, added 1.39 million Microsoft shares last quarter, for a total of 9.07 million, according to a filing. The stake is worth $230.2 million. Microsoft’s shares have underperformed the S&P 500 in four of the past five quarters.
Also from this article:
> Ballmer is the company’s second-biggest shareholder -- with more than 333 million shares, or almost 4 percent. Co-founder and Chairman Bill Gates owns more than 561 million shares, or a 6.7 percent stake, according to Bloomberg data.
So Bill Gates + Steve Ballmer don't own 33%, as has been stated elsewhere, but "only" 6.7 percent of this $200bn company.