The top after-market NASDAQ stock market gainers are: Silicon Motion Technology, ICU Medical, Baidu, Hutchinson Technology, and Array BioPharma. The top after-market NASDAQ stock market losers are: Crescent Financial, Dataram, Extreme Networks, Parexel International, and Rudolph Technologies.

Gainers

Silicon Motion Technology Corp. (SIMO) stock jumped 17.81 percent to $6.55 in the after-market trading, following its better-than-expected fourth quarter adjusted earnings. Adjusted profit was $5.8 million or 18 cents per ADS, compared to a loss of $11.1 million or 40 cents per ADS last year. Sales rose to $40.01 million from $22.53 million. Analysts had expected profit of 9 cents per ADS on revenue of $34.49 million.

Silicon Motion Technology expects first quarter revenue to be flat to down 10 percent sequentially, while analysts predict $31.33 million with 20.50 percent growth from last year. The company anticipates full year 2011 revenue growth of 20 percent to 30 percent from last year, while Street predicts $142.60 million with 12.20 percent growth from last year.

Shares of ICU Medical, Inc. (ICUI) climbed 10.09 percent to $43 in the after-hours trading, following its better-than-expected fourth quarter earnings and revenue. Profit was $10.0 million or 72 cents a share, up from $7.4 million or 50 cents a share last year. Revenue rose 8.3 percent to $75.6 million. Analysts had expected profit of 53 cents a share on revenue of $70.93 million.

ICU Medical expects full year 2011 earnings of $2.25 to $2.45 a share and revenue of $295 million to $305 million, while Street analysts predict profit of $2.22 a share on revenue of $298.61 million.

Baidu, Inc. (BIDU) stock advanced 7.70 percent to $116.99 in the after-market session, following its better-than-expected fourth quarter earnings. Adjusted profit was 1.19 billion Chinese yuan, up from 0.45 billion Chinese yuan last year. Adjusted earnings per share was 3.40 Chinese yuan or $0.52. Revenue rose 94.4 percent to 2.45 billion Chinese yuan or $371.3 million. Analysts had expected profit of 46 cents a share on revenue of $360.82 million.

Baidu expects first quarter revenue of 2.38 billion Chinese yuan to 2.45 billion Chinese yuan ($360.6 million to $371.2 million), representing an 83.9 percent to 89.3 percent year-over-year growth, while Street predicts $354.06 million.

Shares of Hutchinson Technology Inc. (HTCH) gained 7.25 percent to $3.55 in the after-hours session.

Array BioPharma, Inc. (ARRY) stock increased 6.90 percent to $3.10 in the after-market trading, following its narrower-than-expected second quarter loss. Loss narrowed to $12.4 million or 23 cents a share from $21.8 million or 44 cents a share last year. Revenue rose to $16.5 million from $9.6 million. Analysts had expected a loss of 28 cents a share on revenue of $16.36 million.

Losers

Shares of Crescent Financial Corp. (CRFN) plunged 10.04 percent to $2.06 in the after-hours trading.

Dataram Corp. (DRAM) stock lost 8.81 percent to $2.07 in the after-market trading.

Shares of Extreme Networks Inc. (EXTR) fell 5.49 percent to $3.10 in the after-hours session. Adjusted profit for second quarter was $5.1 million or 6 cents a share, up from $4.8 million or 5 cents a share last year. Revenue rose 7 percent to $85.13 million. The company expects third quarter adjusted earnings of 5 cents to 8 cents a share and revenue of $82 million to $85 million.

Further, aimed at continuing to improve financial performance, during mid January, Extreme Networks took actions to reduce headcount by about 35 employees or roughly 5 percent of worldwide headcount. This action will result in a restructuring charge in Q3 between $1.0 million to $1.5 million.

Additionally, Extreme Networks has initiated cost reduction programs aimed at driving additional efficiencies throughout the company. The company believes these actions are targeted to expand gross margins and accelerate its ability to reach its stated target of double-digit operating income. Going forward, the company believes these actions will lower its operating expense by up to $2 million per quarter and $8 million annually.

Parexel International Corp. (PRXL) stock declined 5.21 percent to $22 in the post-market session, after it guided third quarter outlook and lowered fiscal 2011 guidance, which came in below analysts forecast. The company expects third quarter adjusted earnings of 29 cents to 31 cents a share and revenue of $307 million to $312 million, while analysts predict profit of 33 cents a share on revenue of $320.87 million.

Parexel lowered its fiscal 2011 earnings guidance to range of $1.17 to $1.23 a share from previous outlook of $1.23 to $1.31 a share, while adjusted earnings are projected to be between $1.18 and $1.24 a share. The company reduced 2011 revenue forecast to range of $1.22 billion to $1.24 billion from previous range of $1.25 billion to $1.27 billion. Street analysts predict profit of $1.26 a share on revenue of $1.25 billion.

Parexel reported second quarter adjusted earnings of $17.2 million or 29 cents a share, up from $15.1 million or 26 cents a share last year. Revenue rose to $364.05 million from $337.98 million. Analysts had expected profit of 28 cents a share on revenue of $302.76 million.

Shares of Rudolph Technologies Inc. (RTEC) decreased 5.07 percent to $9.55 in the after-hours trading. Adjusted profit for fourth quarter was $11.3 million or 36 cents a share, compared to $520,000 or 2 cents a share last year. Revenue rose 87 percent to $54 million.