The top after-market NASDAQ stock market gainers are: Cray, Red Robin Gourmet Burgers, Aruba Networks, SunPower, and American Public Education. The top after-market NASDAQ stock market losers are: Blue Coat Systems, Duckwall-ALCO Stores, Maxwell Technologies, Accuray, and ACI Worldwide.

Gainers

Cray Inc. (CRAY) stock jumped 10.13 percent to $8.26 in the after-market trading.

Shares of Red Robin Gourmet Burgers Inc. (RRGB) climbed 9.75 percent to $23.18 in the after-hours trading, as its fourth quarter earnings exceeded Street view. Adjusted profit was $1.9 million or $0.12 per share, up from $1.58 million or $0.10 per share last year. Revenue rose 5.7 percent to $192.6 million. Analysts had expected profit of $0.05 per share on revenue of $190.97 million. Comparable restaurant sales increased 0.8 percent for company-owned restaurants.

For fiscal 2011, Red Robin Gourmet expects to open 10 new company-owned restaurants, one of which opened early in the first quarter of 2011, and franchisees are expected to open three to four new restaurants.

Aruba Networks, Inc. (ARUN) stock soared 8.85 percent to $29.04 in the after-market session, as its second quarter earnings and revenue topped Street view. Adjusted profit was $16.34 million or $0.14 per share, up from $6.31 million or $0.06 per share last year. Revenue grew 50 percent to $93.86 million. Analysts had expected profit of $0.13 a share on revenue of $87.92 million.

Aruba Networks said its chief financial officer Steffan Tomlinson will leave the company, effective March 31, 2011 to take a position in venture capital. The company has initiated a search for a replacement.

Shares of SunPower Corp. (SPWRA) gained 7.80 percent to $18.79 in the after-hours session, while the company's class B shares (SPWRB) rose 5.12 percent to $18.07. The company posted fourth quarter earnings of $152.25 million or $1.44 a share, higher than $8.54 million or $0.09 a share last year. Adjusted profit was $1.36 a share, up from $0.47 a share. Revenue rose to $937.07 million from $547.94 million. Analysts had expected profit of $1.05 a share on revenue of $931.40 million.

SunPower expects first quarter adjusted earnings of $0.15 to $0.21 a share and revenue of $475 million to $525 million, while Street predicts profit of $0.16 a share on revenue of $488.61 million. The company raised its fiscal 2011 adjusted profit guidance to $2.00 to $2.20 a share from previous range of $1.75 to $2.05 a share. The company increased 2011 revenue outlook to range of $2.80 billion to $2.95 billion from previous range of $2.65 billion to $2.85 billion. Street analysts predict profit of $1.87 a share on revenue of $2.77 billion for fiscal 2011.

American Public Education, Inc. (APEI) stock increased 5.76 percent to $37.11 in the after-market trading. Fourth quarter earnings were $9.61 million or 52 cents a share, up from $8.38 million or 44 cents a share last year. Revenue rose to $56.31 million from $43.65 million. Analysts predict revenue of $56.05 million. The company expects first quarter earnings of 43 cents to 45 cents a share and revenue growth of about 20 percent above last year.

Losers

Shares of Blue Coat Systems Inc. (BCSI) plunged 8.22 percent to $28.01 in the after-hours trading, as its third quarter earnings and revenue missed Street view. Adjusted profit was $16.7 million or 34 cents a share, down from $17.09 million or 37 cents a share last year. Revenue rose to $122.9 million from $121.0 million. Analysts had expected profit of 36 cents a share on revenue of $125.11 million.

Blue Coat Systems expects fourth quarter adjusted earnings of 32 cents to 38 cents a share and revenue of $121 million to $128 million, while Street predicts profit of 38 cents a share on revenue of $129.84 million.

Duckwall-ALCO Stores Inc. (DUCK) stock lost 5.66 percent to $12.50 in the after-market session.

Shares of Maxwell Technologies Inc. (MXWL) fell 5.37 percent to $18.50 in the after-hours session. Loss for the fourth quarter narrowed to $2.36 million or 9 cents a share from $9.98 million or 39 cents a share last year. Adjusted profit was $1.07 million or 4 cents a share, compared to $2.21 million or 9 cents a share last year. Revenue rose to $34.23 million from $28.0 million.

Considering the impact of the Chinese New Year holidays and historic seasonal softness, we expect first quarter revenue to be flat to slightly higher compared with that reported in the fourth quarter, but up substantially compared with last year. For the full year, we expect top line growth to exceed the rate established in 2010, and steadily improving operating performance should enable the company to continue to be profitable on a non-GAAP basis at the operating income line, said David Schramm, Maxwell's chief executive officer.

Accuray Inc. (ARAY) stock slid 4.45 percent to $10.53 in the after-market trading.

Shares of ACI Worldwide, Inc. (ACIW) declined 4.03 percent to $28.80 in the after-hours trading.