6. First Solar ( FSLR) Company Profile: First Solar makes solar electric power modules using a proprietary thin-film semiconductor technology. SAC Capital's Investment: The hedge fund owned about 195,000 shares of the solar company as of Sept. 30. The position was worth $12 million at the end of the third quarter. Share Price Performance: First Solar shares have tumbled 65% this year along with many other solar stocks. Since Sept. 30, the stock has fallen almost 30%, which was sparked by the CEO's abrupt departure in October and the company's weak outlook.