12 Stocks Moving In Thursday's Pre-Market Session

Gainers

St. Jude Medical, Inc. (NYSE: STJ) shares rose 26.25 percent to $78.24 in pre-market trading after Abbott Laboratories (NYSE: ABT) announced it has entered into an agreement to acquire St. Jude for a total consideration of $25 billion.

Sarepta Therapeutics Inc (NASDAQ: SRPT) shares rose 22.21 percent to $14.00 in pre-market trading after gaining 4.81 percent on Wednesday.

Advaxis, Inc. (NASDAQ: ADXS) shares rose 12.90 percent to $9.10 in pre-market trading as the company reported that the FDA has granted Fast Track Designation for its immunotherapy product candidate ADXS-HER2.

Facebook Inc (NASDAQ: FB) rose 10.33 percent to $120.14 in pre-market trading after the company reported better-than-expected results for its first quarter on Wednesday. The social media behemoth posted earnings of $0.77 per share, $0.15 ahead of the Street’s consensus. Revenue of $5.38 billion, up an 52 percent year-over-year, beat estimates by $120 million.

Adamas Pharmaceuticals Inc (NASDAQ: ADMS) rose 9.66 percent to $19.19 in pre-market trading as the company reported positive top-line results from its phase 3 EASE lid 3 trial of ADS-5102.

Medivation Inc (NASDAQ: MDVN) rose 6.05 percent to $55.20 in pre-market trading as Sanofi SA (ADR) (NYSE: SNY) offered to acquire Medivation for $52.50 per share.

Find out what's going on in today's market and bring any questions you have to Benzinga's PreMarket Prep.

Losers

Symantec Corporation (NASDAQ: SYMC) shares fell 16.46 percent to $15.13 in pre-market trading as the company lowered its forecast for the fourth quarter. The company also reported that its CEO Michael Brown will step down.

Infinera Corp. (NASDAQ: INFN) shares fell 14.58 percent to $13.30 in pre-market trading. Infinera reported Q1 adjusted earnings of $0.19 per share on sales of $245 million. Citigroup downgraded Infinera from Buy to Neutral and lowered the price target from $20.00 to $17.00.

FirstEnergy Corp. (NYSE: FE) shares fell 8.46 percent to $33.00 in pre-market trading as Dow Jones reported that FirstEnergy and American Electric Power Company Inc (NYSE: AEP) will need to receive federal approval for cost-shifting plans in Ohio. Barclays downgraded FirstEnergy from Overweight to Equal-weight and lowered the price target from $39.00 to $33.00.

Alexion Pharmaceuticals, Inc. (NASDAQ: ALXN) shares fell 3.83 percent to $145.00 in pre-market trading as the company reported weak Q1 results.

Vertex Pharmaceuticals Incorporated (NASDAQ: VRTX) shares fell 2.96 percent to $82.00 in pre-market trading after the company reported weaker-than-expected earnings for its first quarter. Goldman Sachs downgraded Vertex Pharmaceuticals from Buy to Neutral and lowered the price target from $109.00 to $88.00.

First Solar, Inc. (NASDAQ: FSLR) shares fell 2.29 percent to $60.61 in pre-market trading. First Solar reported upbeat earnings for the first quarter, but the company missed analysts’ sales estimates.