The top after-market NASDAQ Stock Market gainers are: Human Genome Sciences, Tangoe, Conceptus, FreightCar America and GTx. The top after-market NASDAQ Stock Market losers are: TranS1, Crocs, Gulfport Energy Corp, Green Mountain Coffee Roasters and Sequenom, Inc.

Gainers:

Human Genome Sciences, Inc. (NASDAQ:HGSI) shares climbed 21.38 percent to $13.40 in aftermarket trading session. The stock has a 52-week low of $10.40, a 52-week high of $30.15 and has $2.15 billion market capitalization.

Tangoe, Inc. (NASDAQ:TNGO) shares surged 8.93 percent to $13.77 in aftermarket trading session.

Conceptus, Inc. (NASDAQ:CPTS) shares advanced 8.33 percent to $11.32 in post market trading session. The company announced that it has won a favorable jury verdict in its patent infringement lawsuit against Hologic in the United States District Court, Northern District of California. The jury has awarded Conceptus $18.8 million in monetary damages.

FreightCar America, Inc. (NASDAQ:RAIL) shares advanced 7.16 percent to $16.02 in post market trading session. The company stock plunged more than 8 percent in regular trading session.

GTx, Inc. (NASDAQ:GTXI) shares gained 6.04 percent to $4.04 in post market trading session after plunging more than 4 percent in regular trading session.

Losers:

TranS1 Inc. (NASDAQ:TSON) shares slumped 35.58 percent to $2.01 in post market trading session. The company announced that it received a subpoena from the U.S. Department of Health and Human Services (HHS) seeking documents for a period of more than three years.

Crocs, Inc. (NASDAQ:CROX) shares slumped 35.29 percent to $17.24 in aftermarket trading session after lowering its third quarter earnings outlook.

For the third quarter, the company currently expects third-quarter earnings in the range of 0.31 to $0.33 per share compared to its earlier estimation of $0.40 per share.

Gulfport Energy Corp. (NASDAQ:GPOR) shares plunged 20.77 percent to $22.50 in aftermarket trading session. The stock has a 52-week low of $15.64, a 52-week high of $38.09 and has $1.45 billion market capitalization.

Green Mountain Coffee Roasters, Inc. (NASDAQ:GMCR) shares declined 7.87 percent to $81.36 in post market trading session.

Sequenom, Inc. (NASDAQ:SQNM) shares declined 7.16 percent to $5.59 in post market trading session. Barclays Capital lowered SQNM fiscal 2011 earnings estimates to $1.67 from $1.69.

Barclays NASDAQ Stock Market Court California