The top after-market NASDAQ losers Thursday were: Cleantech Solutions International, AsiaInfo-Linkage, Sonus Networks, Affymax, Dendreon Corp, OpenTable, WisdomTree Investments, QLogic Corp and ZELTIQ Aesthetics.

Cleantech Solutions International, Inc. (CLNT) stock plunged 5.08 percent to $5.42 in aftermarket session. The company announced that it is not in possession of any material information that has not been disclosed to the public in reports filed with the U.S. Securities and Exchange Commission that could account for the unusual trading activity in its common stock.

AsiaInfo-Linkage, Inc. (ASIA) stock plunged 4.1 percent to $11.42 in post market trading. The company stock surged more than 6 percent in regular trading.

Sonus Networks, Inc. (SONS) stock plunged 3.85 percent to $2.75 in post market session. The stock has a 52-week low of $1.97, a 52-week high of $4.06 and $798.87 million in market capitalization.

Affymax, Inc. (AFFY) stock plunged 3.47 percent to $11.40 in post market session. The company stock gained nearly 4 percent in regular trading session.

Dendreon Corp. (DNDN) stock declined 3.02 percent to $10.12 in aftermarket session. The stock has a 52-week low of $6.46, a 52-week high of $43.96 and $1.60 billion in market capitalization.

OpenTable, Inc. (OPEN) stock fell 2.74 percent to $39.45 in post market session.

WisdomTree Investments, Inc. (WETF) stock fell 2.16 percent to $8.32 in post market session. The company stock gained nearly 2 percent in regular session.

QLogic Corp. (QLGC) stock declined 2 percent to $17.11 in post market session. The stock has a 52-week low of $11.95, a 52-week high of $19.00 and $1.69 billion in market capitalization.

ZELTIQ Aesthetics, Inc. (ZLTQ) stock declined 1.65 percent to $5.95 in aftermarket session. The company stock advanced more than 3 percent in regular session after announcing that Sergio Garcia has been named Senior Vice President, General Counsel, and Corporate Secretary.