The top after-market NASDAQ gainers Wednesday were: Premier Exhibitions, Bed Bath & Beyond, Glu Mobile, Magal Security Systems, Vical Inc and Clearwire Corp. The top after-market NASDAQ losers were: A. Schulman, Carmike Cinemas, Complete Genomics, Cepheid, Microvision and Builders FirstSource.

Gainers

Premier Exhibitions, Inc. (PRXI) stock climbed 10 percent to $2.97 in aftermarket session. Premier Exhibitions announced Wednesday that due to the level of interest in its auction of the Titanic artifact collection and the late entry of additional potential bidders, the Company has extended the deadline for the submission of bids to 5 p.m. on Monday, April 9, 2012.

Bed Bath & Beyond Inc. (BBBY) stock surged 5.47 percent to $69.85 in aftermarket session. Its fourth quarter net income surged to $351.0 million or $1.48 per share from $283.5 million or $1.12 per share in the same period a year-earlier. Analysts' expected net profit of $1.33 per share.

For the first quarter, the company expects earnings to be in a range of $0.79 to $0.83 per share compared to analysts' estimation of $0.82 per share.

Glu Mobile Inc. (GLUU) stock gained 2.07 percent to $4.92 in aftermarket session. The company announced it has completed the acquisition of the Deer Hunter trademark and associated domain names from Atari.

Magal Security Systems Ltd. (MAGS) stock gained 1.66 percent to $5.52 in post market trading after climbing more than 19 percent in regular trading. The company swung to fourth quarter net profit of $4.26 million or $0.27 per share compared to a net loss of $1.48 million or $0.14 per share in the same period a year-ago.

Vical Inc. (VICL) stock advanced 1.56 percent to $3.25 in aftermarket session.

Clearwire Corp. (CLWR) shares gained 1.36 percent to $2.23 in post market session. The stock has a 52-week low of $1.24, a 52-week high of $6.11 and $2.84 billion in market capitalization.

Losers

A. Schulman, Inc. (SHLM) stock slumped 7.58 percent to $25.74 in aftermarket session. The company reported second quarter adjusted net profit of $11.2 million or $0.38 per share compared to $12.1 million or $0.39 per share in the same period a year-ago, while analysts'' expected net income of $0.44 per share.

Carmike Cinemas, Inc. (CKEC) stock slumped 6.06 percent to $13.65 in aftermarket session. The company announced the pricing of its previously announced underwritten public offering of 4,000,000 shares of its common stock at $13.00 per share.

Complete Genomics, Inc. (GNOM) plunged 4.31 percent to $3.11 in aftermarket session.

Cepheid (CPHD) stock fell 3.82 percent to $39.52 in post market session. The stock has a 52-week low of $28.33, a 52-week high of $45.00 and $2.68 billion in market capitalization.

Microvision, Inc. (MVIS) stock declined 3.35 percent to $2.60 after plunging more than 6 percent in regular session.

Builders FirstSource, Inc. (BLDR) stock declined 2.56 percent to $3.80 in post market session.

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