Pre-Open Movers 4/20: (ACTG) (WOLF) (MSFT) Higher; (RVBD) (SNDK) (TPX) Lower (more...)

Below are stocks making major moves in pre-open trading Friday:

HIGHER:

• Acacia Research (NASDAQ: ACTG) 9% HIGHER; tops Q1 views
  
• Great Wolf Resorts, Inc. (NASDAQ: WOLF) 7% HIGHER; raised bid
  
• Amarin Corporation plc (NASDAQ: AMRN) 5% HIGHER; new Buy rating
  
• Popular, Inc. (NASDAQ: BPOP) 5% HIGHER; Tops Q1 EPS by 2c
  
• Syntroleum Corp. (NASDAQ: SYNM) 5% HIGHER; new Buy rating
  
• Schlumberger Ltd. (NYSE: SLB) 4% HIGHER; Tops Q1 EPS by 1c
  
• Microsoft Corp. (NASDAQ: MSFT) 3% HIGHER; tops Q3 views
  
• Advanced Micro Devices, Inc. (NYSE: AMD) 2% HIGHER; tops Q4 views
  
• Capital One Financial Corp. (NYSE: COF) 2% HIGHER; tops Q1 views
  
• McDonald's Corp. (NYSE: MCD) 2% HIGHER; strong Q1 results
  
• Kimberly-Clark Corporation (NYSE: KMB) 2% HIGHER; strong Q1 results
  
• General Electric (NYSE: GE) 2% HIGHER; strong Q1 results

LOWER:

• Riverbed Technology, Inc. (NASDAQ: RVBD) 18% LOWER; Q1 results, guides below
  
• Sandisk Corp (NASDAQ: SNDK) 14% LOWER; misses Q1, weak guidance
  
• Tempur-Pedic International, Inc. (NYSE: TPX) 14% LOWER; lackluster Q1 results, guidance
  
• Extreme Networks, Inc. (Nasdaq: EXTR) 15% LOWER; guides Q3 lower
  
• Expeditors International (Nasdaq: EXPD) 7% LOWER; Issues Q1 EPS Outlook Below Views
  
• Ethan Allen (NYSE: ETH) 6% LOWER; Sees Q3 EPS at Or Below Views Following Adjustments
  
• Cepheid, Inc. (NASDAQ: CPHD) 4% LOWER; Q1 results
  
• Freescale Semiconductor (NYSE: FSL) 3% LOWER; Q1 results
  
• Embraer SA (NYSE: ERJ) 1% LOWER; downgraded

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