The top after-market NASDAQ Stock Market gainers are: Stamps.com, Westmoreland Coal, GT Advanced Technologies, Interface and Bon-Ton Stores. The top after-market NASDAQ Stock Market losers are: Acme Packet, Westwood One, NN, Cytori Therapeutics and Spreadtrum Communications.

Gainers:

Stamps.com Inc. (NASDAQ:STMP) shares surged 18.82 per cent to $22.10 in post market trading session.

Westmoreland Coal Co. (NASDAQ:WLB) shares surged 16.96 per cent to $8.69 in post market trading session. The stock has a 52-week low of $6.61, a 52-week high of $19.28 and has $115.55 million market capitalization.

GT Advanced Technologies, Inc. (NASDAQ:GTAT) shares surged 14.82 per cent to $7.73 in post market trading session.

Interface, Inc. (NASDAQ:IFSIA) shares advanced 14.16 per cent to $12.19 in aftermarket trading session.

Bon-Ton Stores, Inc. (NASDAQ:BONT) shares gained 13.07 per cent to $5.19 in aftermarket trading session. The stock has a 52-week low of $3.91, a 52-week high of $17.49 and has $102.19 million market capitalization.

Losers:

Acme Packet, Inc. (NASDAQ:APKT) shares slumped 14.27 per cent to $36.59 in post market trading session after providing a weak third-quarter outlook.

For third quarter, the company expects to generate total revenues of $70 million compared to analysts’ expectations of $82.77 million.

Westwood One, Inc. (NASDAQ:WWON) shares plunged 12.02 per cent to $3 in aftermarket trading session. The stock has a 52-week low of $2.11, a 52-week high of $11.60 and has $67.81 million market capitalization.

NN, Inc. (NASDAQ:NNBR) shares plunged 11.24 per cent to $4.50 in aftermarket trading session. The stock has a 52-week low of $4.47, a 52-week high of $19.39 and has $85.93 million market capitalization.

Cytori Therapeutics Inc. (NASDAQ:CYTX) shares declined 11.19 per cent to $2.61 in post market trading session.

Spreadtrum Communications, Inc. (NASDAQ:SPRD) shares declined 7.33 per cent to $18.05 in aftermarket trading session. The company stock surged more than 11 per cent in regular trading session.

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