The top aftermarket NYSE gainers Thursday were: Cloud Peak Energy, B&G Foods Holdings, Magnum Hunter Resources, Suntech Power Holdings, Itau Unibanco Banco Holding, DaVita, MEMC Electronic Materials, Encana Corp, Trina Solar and Yingli Green Energy Holding.

Cloud Peak Energy Inc. (CLD) shares surged 5.2 percent to $18.40 in post market trading session. The company reported fourth quarter net profit of $43.8 million or $0.72 per share compared to $12.9 million or $0.36 per share in the same quarter a year-ago.

Revenue rose to $402.49 million from $345.80 million in the same quarter last year. Analysts' expected the company to report net profit of $0.52 per share on revenues of $405.60 million for the fourth quarter.

B&G Foods Holdings Corp. (BGS) shares gained 3.6 percent to $23.00 in aftermarket trading session. The company reported fourth quarter net profit of $12.3 million or $0.25 per share compared to $14.3 million or $0.29 per share in the same quarter last year. Adjusted net income rose to $14.7 million or $0.30 per share from $13.7 million or $0.28 per share last year.

Magnum Hunter Resources Corp. (MHR) shares advanced 3.6 percent to $7.19 in aftermarket trading session.

Suntech Power Holdings Co., Ltd. (STP) shares rose 3.56 percent to $3.49 in aftermarket trading session. The stock has a 52-week low of $1.70, a 52-week high of $10.83 and $606.84 million in market capitalization.

Itau Unibanco Banco Holding SA (ITUB) shares advanced 3.01 percent to $21.89 in aftermarket trading session. The stock has a 52-week low of $14.47, a 52-week high of $24.72 and $96.47 billion in market capitalization.

DaVita Inc. (DVA) shares gained 2.95 percent to $88.00 in aftermarket trading session. The company reported fourth quarter net income of $148.12 million or $1.56 per share compared to $69.02 million or $0.70 per share in the same period a year-ago and against analysts' estimation of $1.48 per share.

MEMC Electronic Materials, Inc. (WFR) shares advanced 2.58 percent to $4.78 in post market trading session. RBC Capital raised WFR's fiscal 2012 revenue estimate to $2.6 billion from $2.599 billion and fourth quarter revenue estimate to $917.5 million from $701.2 million.

Encana Corp. (ECA) shares advanced 2.57 percent to $20.75 in aftermarket trading session. The company stock surged more than 4 percent in regular trading session.

Trina Solar Ltd. (TSL) shares advanced 2.52 percent to $9.35 in aftermarket trading session. The company announced Thursday that its wholly-owned subsidiary, Trina Solar (Changzhou) Science & Technology Co. Ltd., has obtained a three-year structured term loan facility from Standard Chartered Bank.

Yingli Green Energy Holding Co, Ltd. (YGE) shares gained 2.23 percent to $4.59 in aftermarket trading session.