Take a look at some of Wednesday's midday movers:

  Apple [ AAPL 599.21 -4.79 ( -0.79% )   ] moved lower following a shakeup in its management ranks earlier this week.

  ( Read More: Trading Oil in the Wake of Sandy )

  Facebook [ FB 21.115 -0.8275 ( -3.77% )   ] fell after its lockup period expired. About 234 million shares held by employees are eligible for sale in the public market.

  Owens Corning , Masco and Lumber Liquidators all rose as investors viewed them as Hurricane Sandy recovery stocks.

 

 

 

Self-Storage REITS Extra Space Storage , Sovran Self Storage and CubeSmart moved higher as the rebuilding effort from the destruction of Hurricane Sandy begins.

 

 

Property & Casualty Stocks including ACE , AIG , Travelers , Progressive and Everest Re all moved lower in the wake of the billions of dollars in damages Hurricane Sandy left behind.

 

 

IBM [ IBM 194.57 1.30 ( +0.67% ) ] rose after authorizing an additional $5 billion share buyback plan.

Western Union [ WU 12.81 -5.12 ( -28.56% ) ] traded at its lowest level since April 2009 after the company slashed its earnings outlook.

Cameron [ CAM 49.305 -1.935 ( -3.78% ) ] moved lower after the company issued weak guidance for the rest of the year.

MasterCard [ MA 461.03 8.05 ( +1.78% ) ] moved higher after the credit-card provider posted better quarterly earnings.

Biogen Idec [ BIIB 138.79 -4.14 ( -2.9% ) ] fell after Goldman Sachs said the company's experimental hemophilia drug didn’t compare well to leader Baxter’s [ BAX 62.53 1.37 ( +2.24% ) ] well-established drug.

Seagate [ STX 27.18 -0.73 ( -2.62% ) ] slid after the company reported weaker-than-expected quarterly earnings.

WellCare Health Plans [ WCG 47.545 -7.685 ( -13.91% ) ] tumbled after the company cut its 2012 forecast as its Medicaid insurance program in Kentucky posted weak results.

Red Robin [ RRGB 34.06 6.58 ( +23.94% ) ] moved higher after the restaurant chain posted better-than-expected earnings.

GT Advanced Technologies [ GTAT 4.43 -0.69 ( -13.48% ) ] plunged after the solar and led equipment maker said it would cut 25 percent of its workforce.

GlaxoSmithKline [ GSK 44.805 -0.545 ( -1.2% ) ] lost ground after its earnings fell more than expected.

(Read More: CNBC's Market Insider Blog )

—By CNBC's Rich Fisherman.

Questions? Comments? Email us at marketinsider@cnbc.com