The top after-market NYSE gainers Wednesday were Ellie Mae, AVG Technologies, Wabash National Corp, Roundy's and Artio Global Investors Inc. The top after-market NYSE losers were Barnes & Noble, Mueller Water Products, Cameron International Corp, Basic Energy Services and DigitalGlobe.

Gainers

Ellie Mae, Inc. (ELLI) shares climbed 12.88 percent to $28.22 in post-market trading. The company reported the third quarter net income of $6.8 million or $0.25 per share, up from $2.7 million or $0.12 per share in the same period last year. The company also expects the fiscal 2012 net profit to be in a range of $0.68 to $0.70 per share on revenues of $99.5 million to $100.0 million, up from prior estimate of $0.49 to $0.52 per share on revenues of $90.0 to $91.0 million. 

AVG Technologies NV (AVG) shares rallied 8.77 percent to $11.41 in post-market trading. Its third quarter net profit surged to $18.96 million or $0.35 per share from $3.64 million or $0.09 per share in the same period last year. Revenues surged 34 percent to $95.25 million compared to the same quarter last year.

Wabash National Corp. (WNC) shares surged 7.29 percent to $6.77 in post-market trading. The company reported the third quarter net income of $18.4 million or $0.27 per diluted share on revenues of $406 million.

Roundy's Inc. (RNDY) shares surged 6.87 percent to $5.60 in post-market trading. The company stock plunged more than 5.5 percent in regular trading.

Artio Global Investors Inc. (ART) shares gained 2.94 percent to $2.45 in post-market trading. The company stock was upgraded to a “neutral” rating from a “sell” rating at Citigroup.

Losers

Barnes & Noble, Inc. (BKS) shares plunged 4.14 percent to $16.14 in post-market trading. The company stock climbed more than 13 percent in regular trading.

Mueller Water Products Inc. (MWA) shares plunged 3.39 percent to $5.03 in post-market trading. The company swung to the fourth quarter net profit of $4 million or $0.03 per share compared to a net loss of $9.6 million or $0.06 per share in the same period last year.

Cameron International Corp. (CAM) shares fell 3.12 percent to $49.06 in post-market trading. Its third quarter net profit rose to $223.6 million or $0.90 per share from $164.5 million or $0.67 per share in the same period last year. Adjusted net profit was $0.91 per share, above analysts’ estimate of $0.88 per share.

Basic Energy Services Inc. (BAS) shares declined 2.92 percent to $10.09 in post-market trading. The stock has a 52-week low of $8.52, a 52-week high of $23.41 and $437.20 million in market capitalization.

DigitalGlobe Inc. (DGI) shares fell 2.66 percent to $25.25 in post-market trading. The company stock climbed more than 10 percent in regular trading.