20 Stocks Moving In Monday's Pre-Market Session

Gainers

• W&T Offshore, Inc. WTI rose 29.4 percent to $2.55 in pre-market trading after gaining 1.55 percent on Friday.
• Achaogen Inc AKAO shares rose 28.6 percent to $6.75 in pre-market trading after the company disclosed positive results in Phase 3 cUTI and CRE clinical trials of plazomicin.
• Pacific Drilling SA PACD shares rose 25.7 percent to $6.70 in pre-market trading after climbing 17.40 percent on Friday.
• Stone Energy Corporation SGY shares rose 18.2 percent to $7.99 in pre-market trading after the company reported extensions to a restructuring support agreement on Friday.
• Mechel PAO (ADR) MTL shares rose 16.7 percent to $6.00 in pre-market trading after falling 1.91 percent on Friday.
• Ocean Rig UDW Inc. ORIG shares rose 14.9 percent to $2.55 in pre-market trading after climbing 14.43 percent on Friday.
• Seadrill Ltd SDRL rose 14.7 percent to $4.37 in pre-market trading after surging 12.06 percent on Friday.
• Denbury Resources Inc. DNR rose 13 percent to $4.45 in pre-market trading after declining 0.25 percent on Friday.
• Atwood Oceanics, Inc. ATW rose 11.6 percent to $15.05 in pre-market trading after gaining 12.70 percent on Friday.
• Approach Resources Inc. AREX rose 11.3 percent to $4.35 in pre-market trading after gaining 2.36 percent on Friday.
• Whiting Petroleum Corp WLL shares rose 10.3 percent to $13.39 in pre-market trading after the company disclosed that $721 million of convertible notes have been converted to stock.
• CARBO Ceramics Inc. CRR rose 10 percent to $10.00 in pre-market trading after gaining 4.00 percent on Friday.
• Anavex Life Sciences Corp. AVXL rose 9.2 percent to $4.75 in pre-market trading after gaining 2.84 percent on Friday.
• Tidewater Inc. TDW shares rose 8.6 percent to $4.06 in pre-market trading after gaining 8.72 percent on Friday.
• Regeneron Pharmaceuticals Inc REGN rose 3.5 percent to $386.00 in pre-market trading. Chardan Capital upgraded Regeneron Pharmaceuticals from Sell to Neutral and raised the price target from $300.00 to $350.00.

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Losers

• Ophthotech Corp OPHT fell 80.7 percent to $7.50 in pre-market trading after the company disclosed that Phase 3 trials for Fovista did not meet pre-specified primary endpoint.
• Alexion Pharmaceuticals, Inc. ALXN fell 13.7 percent to $114.03 in pre-market trading. Alexion named David Brennan as Interim chief executive and David Anderson as chief financial officer, following the resignations of its CEO David Hallal and CFO Vikas Sinha. The company expects to file Q3 10-Q in January and disclosed that at this point, the audit and finance committee has not identified facts that require the company to update its previous historical results.
• Era Group Inc ERA shares fell 11.3 percent to $12.85 in pre-market trading after rising 12.86 percent on Friday.
• B2Gold Corp BTG fell 4.2 percent to $2.30 in pre-market trading after dropping 5.88 percent on Friday.
• Frontier Communications Corp FTR shares fell 4.1 percent to $3.52 in pre-market trading after dropping 0.81 percent on Friday.