Gainers Federal-Mogul Holdings Corp (NASDAQ: FDML) shares rose 37.55 percent to $6.85 in pre-market trading. Carl Icahn's Icahn Enterprises offered to buy the remaining stock of Federal-Mogul for $7 per share in cash. Federal-Mogul reported Q4 adjusted earnings of $0.22 per share on revenue of $1.798 billion. BroadSoft Inc (NASDAQ: BSFT) shares rose 12.49 percent to $35.40 in pre-market trading after the company reported stronger-than-expected results for the fourth quarter. TASER International, Inc. (NASDAQ: TASR) rose 10.98 percent to $19.40 in pre-market trading after the company reported better-than-expected Q4 results and announced a $50 million buyback plan. Horizon Pharma PLC (NASDAQ: HZNP) shares rose 5.86 percent to $20.95 in pre-market trading after the company reported upbeat Q4 results. Rockwell Medical Inc (NASDAQ: RMTI) shares rose 5.21 percent to $10.50 in the pre-market trading session after gaining 11.76 percent on Friday. Rockwell Medical is expected to post its Q4 earnings after the closing bell. Losers Valeant Pharmaceuticals Intl Inc (NYSE: VRX) shares fell 6.37 percent to $75.64 in pre-market trading after the company issued a business update over the weekend. Valeant confirmed that Michael Pearson will resume his role as CEO, effective immediately. The company also announced that it will reschedule a previously announced conference call to discuss its preliminary fourth quarter results, deliver a business review and provide updated guidance for 2016. Southwestern Energy Company (NYSE: SWN) shares fell 5.64 percent to $6.02 in pre-market trading. Raymond James downgraded Southwestern Energy from Market Perform to Underperform. KEYW Holding Corp. (NASDAQ: KEYW) shares fell 3.09 percent to $6.27 in pre-market trading. RBC Capital downgraded KEYW Holding from Outperform to Sector Perform and lowered the price target from $11.00 to $7.00. Novavax, Inc. (NASDAQ: NVAX) shares fell 2.97 percent to $4.57 in pre-market trading as the company reported a wider-than-expected loss for its fourth quarter. Icahn Enterprises LP (NASDAQ: IEP) shares fell 1.12 percent to $56.75 in pre-market trading. Icahn Enterprises reported a Q4 loss of $8.56 per share on sales of $2.6 billion.