The top after-market NASDAQ losers are: Cray, Amylin Pharmaceuticals, ZAGG, HMS Holdings, Clearwire, Riverbed Technology, Aruba Networks, Carrizo Oil & Gas, Glu Mobile and Zynga Inc.

Cray Inc. (NASDAQ:CRAY) shares slumped 11.15 percent to $5.50 in post market trading session. The stock has a 52-week low of $4.96, a 52-week high of $8.38 and $224.55 million in market capitalization.

Amylin Pharmaceuticals, Inc. (NASDAQ:AMLN) shares plunged 5.4 percent to $9.81 in aftermarket trading session.

ZAGG Inc. (NASDAQ:ZAGG) shares declined 2.14 percent to $9.15 in aftermarket trading session. The company stock surged more than 6 percent in regular trading session.

HMS Holdings Corp. (NASDAQ:HMSY) shares declined 2.05 percent to $30.51 in post market trading session. The company announced that it has completed the acquisition of privately-held HDI Holdings, Inc.

Clearwire Corp. (NASDAQ:CLWR) shares declined 1.91 percent to $2.05 in post market trading session. The stock has a 52-week low of $1.24, a 52-week high of $6.11 and $1.92 billion in market capitalization.

Riverbed Technology, Inc. (NASDAQ:RVBD) shares declined 1.74 percent to $23.19 in post market trading session. The company announced that it will release fourth quarter and fiscal year 2011 financial results after the close of market on Thursday, January 26, 2012.

Aruba Networks, Inc. (NASDAQ:ARUN) shares declined 1.67 percent to $18.28 in aftermarket trading session. The stock has a 52-week low of $16.20 a 52-week high of $36.40 and $1.99 billion in market capitalization.

Carrizo Oil & Gas, Inc. (NASDAQ:CRZO) shares declined 1.65 percent to $25.64 in post market trading session. The company stock gained more than 3 percent in regular trading session.

Glu Mobile Inc. (NASDAQ:GLUU) shares declined 1.51 percent to $3.13 in aftermarket trading session.

Zynga Inc. (NASDAQ:ZNGA) shares declined 0.95 percent to $9.41 in post market trading session. In regular trading session, the company stock declined 5 percent below its $10 initial public offering price to close at $9.50 on Nasdaq on its first day of trading Friday.