The top after-market NASDAQ loser Thursday were: Rubicon Technology, Crocs, Deckers Outdoor Corp, Celldex Therapeutics, Grand Canyon Education, MercadoLibre, PLX Technology, Infinity Pharmaceuticals, UTi Worldwide and Century Aluminum.

Rubicon Technology, Inc. (RBCN) stock slumped 14.13 percent to $10.45 in aftermarket trading session. The company reported fourth quarter net profit of $0.04 per share compared to $0.64 per share in the same quarter a year-ago and against analysts’ estimation of $0.07 per share.

For the first quarter, the company expects net loss to be in a range of $0.10 to $0.14 per share on revenues of $8 to $12 million compared to analysts’ estimation net profit of $0.11 per share on revenues of $2.9 million.

Crocs, Inc. (CROX) stock slumped 11.61 percent to $18.05 in aftermarket trading session as its first quarter earnings outlook fell short of expectations. The company expects first quarter earnings to be in a range of $0.24 to $0.26 per share on revenues of 263 to $268 million, while analysts’ expect the company to report quarterly net profit of $0.30 per share on revenues of $268.74 million. Its fourth quarter net profit rose to $5.57 million or $0.06 per share from $4.73 million or $0.05 per share in the same quarter last year.

Deckers Outdoor Corp. (DECK) stock slumped 10.81 percent to $80.46 in aftermarket trading session. The company expects first quarter earnings is to be about $0.25 per share on revenues of $243.8 million compared to analysts’ estimation of $0.63 per share on revenues of $263.25 million. Its fourth quarter net profit rose to $124.73 million or $3.18 per share from $89.23 million or $2.27 per share in the same quarter a year-ago.

Celldex Therapeutics, Inc. (CLDX) stock plunged 5.96 percent to $4.10 in post market trading session. The company announced that it is offering shares of its common stock in an underwritten public offering.

Grand Canyon Education, Inc. (LOPE) stock plunged 5.78 percent to $16.80 in aftermarket trading session.

MercadoLibre, Inc. (MELI) stock declined 5.67 percent to $91.50 in post market trading session. The company reported fourth quarter net profit of $21.61 million or $0.47 per share compared to $15.94 million or $0.36 per share in the same quarter a year-ago, but fell short of analysts’ estimation of $0.51 per share.

PLX Technology, Inc. (PLXT) stock fell 4.96 percent to $3.45 in aftermarket trading session. Its fourth quarter adjusted net los widened to $2.3 million or $0.06 per share from $1.1 million or $0.02 per share in the same period a year-ago.

Infinity Pharmaceuticals, Inc. (INFI) stock declined 4.4 percent to $6.83 in post market trading session. The company stock climbed more than 13 percent in regular trading session.

UTi Worldwide Inc. (UTIW) stock declined 4.1 percent to $15.45 in aftermarket trading session. The stock has a 52-week low of $11.94, a 52-week high of $24.05 and $1.66 billion in market capitalization.

Century Aluminum Co. (CENX) stock declined 4.01 percent to $10.30 in post market trading session. The company swung to fourth quarter net loss of $31 million or $0.35 per share compared to $60 million or $0.64 per share in the same quarter a year-ago.