The latest hit, the stock took at the end of February, when the company announced that it would delay filing its annual 10-K filing with the SEC, because of some questions regarding its financial positions. The announcement comes as Sunedison is in the process of completing the acquisition of Vivint Solar for $1.90 billion, which was opposed by some investors, such as David Tepper's Appaloosa Management. Appaloosa owns 9.5% of Sunedison's yieldco Terraform Power. On the other hand, an investor that has been bullish on Sunedison Inc (NYSE:SUNE), despite the weak performance of the stock is David Einhorn's Greenlight Capital, which, in January, disclosed holding 27.15 million shares and reached an agreement to appoint and independent director to Sunedison's board.