The top after-market NASDAQ losers Monday were: NutriSystem, Skullcandy, AVEO Pharmaceuticals, Alaska Communications Systems Group, GRAVITY Co, Caseys General Stores, QC Holdings, Jazz Pharmaceuticals, DISH Network Corp and Brocade Communications Systems.

NutriSystem Inc. (NTRI) stock slumped 9.93 percent to $10.70 in post market trading session. The company swung to fourth quarter net loss of $0.04 per share compared to net profit of $0.24 per share in the same period a year-ago and against analysts’ estimation o f net loss of $0.02 per share.

Skullcandy, Inc. (SKUL) stock plunged 6.81 percent to $13.82 in aftermarket trading session. The company announced that Mitch Edwards, Chief Financial Officer and General Counsel, has advised the Company of his decision to resign to pursue other opportunities, including charitable and humanitarian activities.

AVEO Pharmaceuticals, Inc. (AVEO) stock plunged 4.79 percent to $12.51 in post market trading session.

Alaska Communications Systems Group, Inc. (ALSK) stock declined 3.61 percent to $3.20 in aftermarket trading session.

GRAVITY Co., Ltd. (GRVY) stock declined 3.93 percent to $2.83 in aftermarket session. The company stock climbed more than 9 percent in regular trading session.

Caseys General Stores, Inc. (CASY) stock fell 2.64 percent to $49.79 in post market trading session. The company reported third quarter net profit of $16.7 million or $0.43 per share compared to $12.9 million or $0.34 per share in the same period last year, but fell short of analysts’ estimation o f $0.44 per share.

QC Holdings, Inc. (QCCO) stock declined 2.43 percent to $3.62 in aftermarket trading session.

Jazz Pharmaceuticals plc. (JAZZ) stock fell 2.44 percent to $50.08 in post market trading session. The company announced an underwritten public offering of 7,883,366 of its ordinary shares held by certain of its existing shareholders.

DISH Network Corp. (DISH) stock declined 1.78 percent to $28.88 in post market trading session. The stock has a 52-week low of $20.89, a 52-week high of $32.56 and $13.14 billion in market capitalization.

Brocade Communications Systems, Inc. (BRCD) stock fell 1.58 percent to $5.59 in post market trading session. The stock has a 52-week low of $3.18, a 52-week high of $7.30 and $2.58 billion in market capitalization.