The top aftermarket NYSE gainers Tuesday were: Atlantic Power, Sprint Nextel, Ultra Petroleum, Nike, Qihoo 360 Technology, Berry Petroleum, Valmont Industries, Carnival Corp and Beazer Homes USA.

Atlantic Power Corp. (NYSE:AT) shares surged 4.93 percent to $14.47 in aftermarket trading session. The stock has a 52-week low of $12.52, a 52-week high of $16.34 and $834.43 million in market capitalization.

Sprint Nextel Corp. (NYSE:S) shares gained 4.68 percent to $2.35 in aftermarket trading session. On Monday, the company accused Time Warner Cable, Comcast Corp. and two other cable-TV companies of infringing patents related to transmitting phone calls over digital lines, Bloomberg reported.

Ultra Petroleum Corp. (NYSE:UPL) shares advanced 3.59 percent to $30.29 in post market trading session. The stock has a 52-week low of $24.39, a 52-week high of $51.20 and $4.47 billion in market capitalization.

Nike, Inc. (NYSE:NKE) shares advanced 3.07 percent to $96.50 in aftermarket trading session. The company reported second quarter net income of $469 million or $1.00 per share compared to net income of $457 million or $0.94 per share in the same quarter a year-ago.

Qihoo 360 Technology Co. Ltd. (NYSE:QIHU) shares gained 2.78 percent to $16.61 in post market trading session. The company stock plunged more than 4 percent in regular trading session.

Berry Petroleum Co. (NYSE:BRY) shares advanced 2.76 percent to $39.50 in post market trading session. The company stock climbed more than 8 percent in regular trading session.

Valmont Industries, Inc. (NYSE:VMI) shares advanced 2.5 percent to $90.50 in post market trading session. The company announced that it has reorganized the legal entity structure of its Delta businesses acquired in May 2010.

Carnival Corp. (NYSE:CCL) shares advanced 2.13 percent to $32.86 in aftermarket trading session. The company reported fourth quarter net income of $217 million or $0.28 per share compared to net profit of $248 million or $0.31 per share in the same quarter a year-ago.

Beazer Homes USA, Inc. (NYSE:BZH) shares advanced 2.05 percent to $2.49 in aftermarket trading session. The company stock surged more than 15 percent in regular trading session.

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