The top after-market NYSE gainers Wednesday were Harvest Natural Resources, Greenbrier Companies, USG Corp, Titan International and Oshkosh Corp. The top after-market NYSE losers were Caplease, Thompson Creek Metals, Millennial Media, Bonanza Creek Energy and Global Payments Inc.

Gainers

Harvest Natural Resources Inc. (NYSE:HNR) shares surged 3.70 percent to $3.08 in post-market trading. The company stock slumped more than 8 percent in regular trading Wednesday after Law Offices of Howard G. Smith announced that a class action lawsuit has been filed in the United States District Court for the southern district of Texas on behalf of all purchasers of the securities of Harvest Natural Resources between May 7, 2010 and March 18, 2013.

Greenbrier Companies Inc. (NYSE:GBX) shares surged 3.21 percent to $22.50 in post-market trading. The company stock plunged more than 3 percent in regular trading.

USG Corp. (NYSE:USG) shares gained 3.05 percent to $25.35 in post-market trading. The stock has a 52-week low of $13.12, a 52-week high of $30.97 and $2.59 billion in market capitalization.

Titan International Inc. (NYSE:TWI) shares advanced 2.46 percent to $21.24 in post-market trading. The stock has a 52-week low of $16.86, a 52-week high of $29.95 and $1.11 billion in market capitalization.

Oshkosh Corp. (NYSE:OSK) shares advanced 1.99 percent to $40.40 in post-market trading. The stock has a 52-week low of $18.49, a 52-week high of $42.66 and $3.46 billion in market capitalization.

Losers

Caplease Inc. (NYSE:LSE) shares plunged 2.60 percent to $5.99 in post-market trading. The company announced the commencement of a public offering of 6,500,000 shares of its common stock.

Thompson Creek Metals Co Inc. (NYSE:TC) shares plunged 2.10 percent to $2.80 in post-market trading. The stock has a 52-week low of $2.25, a 52-week high of $6.94 and $485.84 million in market capitalization.

Millennial Media Inc. (NYSE:MM) shares declined 1.94 percent to $6.07 in post-market trading. The stock has a 52-week low of $5.87, a 52-week high of $23.10 and $490.14 million in market capitalization.

Bonanza Creek Energy Inc. (NYSE:BCEI) shares declined 1.89 percent to $36.15 in post-market trading. The stock has a 52-week low of $14.52, a 52-week high of $42.36 and $1.48 billion in market capitalization.

Global Payments Inc. (NYSE:GPN) stock declined 1.86 percent to $43.69 in post-market trading. The stock slumped more than 9 percent in regular trading after the company reported third quarter results below analysts’ estimates. Quarterly revenue rose 8 percent to $578.7 million compared to $533.5 million last year but missed Reuters' estimate of $580.28 million.

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