The top after-market NYSE gainers on Wednesday are: Georgia Gulf, Newpark Resources, BPZ Resources, Eastman Chemical and Westlake Chemical. The top after-market NYSE losers are: Collective Brands, Winnebago Industries, STR Holdings, Talbots and Korn/Ferry International.

Gainers:

Georgia Gulf Corp. (NYSE:GGC) shares surged 5.26 percent to $26.36 in aftermarket trading session. The company stock plunged more than 5 percent in regular trading session.

Newpark Resources, Inc. (NYSE:NR) shares gained 4.97 percent to $8.66 in aftermarket trading session. The company announced that it will release its second quarter 2011 results on Thursday, July 28, 2011 after the market closes.

BPZ Resources, Inc. (NYSE:BPZ) shares advanced 4.71 percent to $319 in post market trading session. The stock has a 52 week low of $2.97 and 52 week high of $16.83 and has $353.86 million market capitalization.

Eastman Chemical Co. (NYSE:EMN) shares advanced 4.33 percent to $100.88 in aftermarket trading session.

Westlake Chemical Corp. (NYSE:WLK) shares gained 4.24 percent to $52.87 in post market trading session.

Losers:

Collective Brands, Inc. (NYSE:PSS) shares declined 3.29 percent to $13.54 in post market trading session. The company announced that Matthew Rubel has stepped down as president, CEO, and chairman of the board, effective immediately. Michael Massey has been named the interim CEO, and Scott Olivet has been named the company's non-executive chairman.

Winnebago Industries, Inc. (NYSE:WGO) shares declined 3.18 percent to $10.65 in aftermarket trading session. The stock has a 52 week low of $8.10 and 52 week high of $16.60 and has $320.34 million market capitalization.

STR Holdings, Inc. (NYSE:STRI) shares declined 2.63 percent to $15.87 in aftermarket trading session. The company advanced 2.58 percent in regular trading session.

Talbots, Inc. (NYSE:TLB) shares declined 1.98 percent to $3.15 in aftermarket trading session.

Korn/Ferry International (NYSE:KFY) shares declined 1.92 percent to $22.51 in post market trading session. The company stock surged more than 6 percent in regular trading session after reporting fourth quarter net income of $20.34 million or $0.43 per share compared to $8.92 million or $0.19 per share in the same quarter last year.

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