The top after-market NASDAQ gainers Thursday were: Cogo Group, Perfect World Co, Idenix Pharmaceuticals, Pantry, Halozyme Therapeutics, Consolidated Water Co, Neurocrine Biosciences, Merge Healthcare Inc, Cleantech Solutions International and Ituran Location and Control.

Cogo Group, Inc. (COGO) stock climbed 86.60 percent to $3.62 in post market trading session on news that its founder and CEO Jeffrey Kang has proposed to acquire 30 percent of COGO’s assets for $60 million to $82 million. The company swung to fourth quarter net loss of $0.99 per share compared to net income of $0.12 per share in the same quarter a year-ago.

Perfect World Co., Ltd. (PWRD) stock climbed 27.09 percent to $15.95 in post market session. Its fourth quarter net profit rose to $ 260 million yuan ($41.3 million) or 5.45 yuan ($0.87) per ADS from 25.2 million yuan, or 2.36 yuan per ADS in the same quarter last year. Revenue rose 32 percent to 776.4 million yuan ($123.4 million).

Idenix Pharmaceuticals, Inc. (IDIX) stock surged 6.09 percent to $12.20 in aftermarket session.

Pantry, Inc. (PTRY) stock surged 5.86 percent to $13.19 in post market session.

Halozyme Therapeutics, Inc. (HALO) stock gained 3.85 percent to $12.68 in aftermarket session. The stock has a 52-week low of $5.54, a 52-week high of $12.23 and $1.27 billion in market capitalization.

Consolidated Water Co. Ltd. (CWCO) stock rose 3.81 percent to $8.18 in aftermarket session. The company reported fourth quarter net profit of $6.11 million or $0.42 per share compared to $6.29 million or $0.43 per share in the same period a year-ago.

Neurocrine Biosciences, Inc. (NBIX) stock advanced 2.35 percent to $8.70 in post market trading after surging more than 4 percent in regular session.

Merge Healthcare Inc. (MRGE) stock gained 2.14 percent to $6.68 in aftermarket session.

Cleantech Solutions International, Inc. (CLNT) stock advanced 2.17 percent to $2.35 in aftermarket session. The company stock slumped more than 6 percent in regular session.

Ituran Location and Control Ltd. (ITRN) stock gained 2.11 percent to $16.00 in aftermarket trading. The stock has a 52-week low of $11.27, a 52-week high of $16.50 and $367.86 million in market capitalization.