Top Losers

Sonus Networks, Inc. (NASDAQ: SONS) shares dipped 30.09% to $9.20 after the company lowered its outlook and announced the commencement of cost reduction review. Sonus projects Q1 adjusted loss of $0.34 to $0.29 per share on revenue of $47 million to $50 million. Whiting Petroleum Corp. (NYSE:...

Sonus Networks, Inc. (NASDAQ: SONS) shares declined 33.21% to $8.79 in pre-market trading after the company lowered its outlook and announced the commencement of cost reduction review. Sonus projects Q1 adjusted loss of $0.34 to $0.29 per share on revenue of $47 million to $50 million. Whiting...

MEI Pharma, Inc. (NASDAQ: MEIP) fell 62.90% to $2.33 in pre-market trading on failed Pracinostat and azacitidine Phase II study. Vertex Pharmaceuticals Incorporated (NASDAQ: VRTX) shares declined 9.16% to $119.00 in pre-market trading after the company reported data from a 12-week Phase 2 study...

Theravance Inc. (NASDAQ: THRX) shares fell 7.57% to $16.61. GSK and Theravance announced the outcome of US FDA Advisory Committee on BREO(R) ELLIPTA(R) in asthma. Glaxo and Theravance announced that the FDA panel has voted to support efficacy and safety. The panel has voted against the approval...

The Macerich Company (NYSE: MAC) fell 9.20% to $84.90 in pre-market trading following announcement of Simon final offer. Simon Property Group Inc (NYSE: SPG) raised its offer for Macerich to $95.50 per share in cash and stock. Tiffany & Co. (NYSE: TIF) shares fell 3.44% to $83.40 in pre-...

Sungy Mobile Limited (NASDAQ: GOMO) shares dropped 23.08% to $3.80. Sungy Mobile reported a Q4 adjusted loss of $0.23 per share. Vince Holding Corp (NYSE: VNCE) shares fell 15.76% to $18.00. Vince Holding reported Q4 earnings of $0.28 per share on revenue of $94.7 million. The company issued a...

Noble Energy, Inc. (NYSE: NBL) fell 10.62% to $43.01 in pre-market trading after rising 5.50% on Wednesday. Concert Pharmaceuticals, Inc. (NASDAQ: CNCE) shares fell 5.68% to $15.61 in pre-market trading after the company announced a proposed public offering of common stock. PDC Energy, Inc. (...

Willbros Group Inc. (NYSE: WG) shares tumbled 67.70% to $1.77. Willbros Group announced that it is filing a form 12b-25 notification of late filing with the SEC with regard to its annual report on form 10-K. DA Davidson downgraded Willbros Group from Neutral to Underperform and lowered the...

Nektar Therapeutics (NASDAQ: NKTR) shares fell 16.50% to $11.80 in pre-market trading after the company said its breast cancer treatment failed to produce significant results for the primary end point in a Phase III trial. RSP Permian Inc (NYSE: RSPP) fell 5.43% to $25.60 in pre-market trading...

magicJack VocalTec Ltd. (NASDAQ: CALL) shares slipped 17.26% to $6.76. magicJack reported better-than-expected earnings for the fourth quarter, but the company's revenue missed analysts' estimates. The company also announced a new $20 million stock repurchase program. Discovery Laboratories Inc...

Plug Power Inc. (NASDAQ: PLUG) shares fell 9.82% to $2.48 in pre-market trading after the company posted a wider-than-expected loss for the fourth quarter. StemCells Inc. (NASDAQ: STEM) shares dropped 6.45% to $1.16 in pre-market after the company reported a wider loss for the fourth quarter on...

iDreamSky Technology Limited (NASDAQ: DSKY) shares dipped 22.18% to $8.42 after the company issued a weak revenue forecast and announced a $20 million share buyback program. Stifel Nicolaus downgraded iDreamSky Technology from Buy to Hold and removed the price target of $27.00. Park-Ohio Holdings...

iDreamSky Technology Limited (NASDAQ: DSKY) slipped 14.23% to $9.28 in pre-market trading after the company issued a weak revenue forecast and announced a $20 million share buyback program. Stifel Nicolaus downgraded iDreamSky Technology from Buy to Hold and removed the price target of $27.00. E...

Sears Hometown and Outlet Stores, Inc. (NASDAQ: SHOS) shares dipped 21.54% to $10.20 after the company posted a loss for the fourth quarter. The company posted a quarterly loss of $4.63 million, or $0.20 per share, versus a year-ago profit of $3.72 million, or $0.16 per share. Galena Biopharma...

Aéropostale, Inc. (NYSE: ARO) slipped 10.81% to $3.30 in pre-market trading. Aéropostale reported a surprise adjusted profit for the fourth quarter, but the company issued a weak forecast for the first quarter. Zumiez, Inc. (NASDAQ: ZUMZ) fell 4.15% to $38.30 in pre-market trading. Zumiez...