The top after-market NYSE gainers on Wednesday are: Sauer-Danfoss, Big Lots, KeyCorp, NeoPhotonics and Horizon Lines. The top after-market NYSE losers are: Greif, Northstar Realty Finance, MPG Office Trust, CVR Energy and PolyOne Corp.

Gainers

Sauer-Danfoss Inc. (NYSE:SHS) shares climbed 19.10 percent to $36.10 in post market trading session on Wednesday. The company swung to fourth quarter profit of $126.02 million or $2.60 per share compared to a net loss of $74.73 million or $1.55 per share in the same quarter a year-ago. Sauer-Danfoss expects earnings in the range of $3.00 to $4.00 per share for fiscal 2011.

Big Lots, Inc. (NYSE:BIG) shares gained 5.79 percent to $42.20 in aftermarket trading session. The company is expected to report fourth quarter net income of $1.38 per share compared to $1.31 per share in the same quarter last year.

KeyCorp. (NYSE:KEY) shares gained 4.31 percent to $9.43 in post market trading session. The stock has a 52 week low of $6.97 and 52 week high of $9.84 and has $7.96 billion market capitalization.

NeoPhotonics Corp. (NYSE:NPTN) shares advanced 3.91 percent to $18.60 in aftermarket trading session.

Horizon Lines, Inc. (NYSE:HRZ) shares gained 2.9 percent to $3.90 in aftermarket trading session. The stock has a 52 week low of $3.53 and 52 week high of $6.09 and has $116.51 million market capitalization.

Losers

Greif, Inc. (NYSE:GEF) shares declined 5.91 percent to $61.50 in post market trading session as its first quarter earnings and fiscal 2011 guidance fell short of expectations. The company reported first quarter net income of $0.71 per share on revenue of $943.8 million, while analysts’ expected net income of $0.90 per share on revenue of $876.1 million. Greif reduced its full-year earnings guidance by 25 cents, to $4.50 to $4.75 per share, while analysts’ expecting $4.92 per share.

Northstar Realty Finance Corp. (NYSE:NRF) shares declined 5.84 percent to $5.64 in aftermarket trading session

MPG Office Trust, Inc. (NYSE:MPG) shares declined 4.3 percent to $3.56 in post market trading session. The company Funds from Operations (FFO) available to common stockholders for the fourth quarter before specified items was $1.0 million, or $0.02 per diluted share compared to $1.6 million, or $0.03 per diluted share in the same quarter a year-ago.

CVR Energy Inc. (NYSE:CVI) shares fell 4.04 percent to $18.07 in post market trading session. The company reported fourth quarter net income of $2.3 million or $0.03 per share compared to $9.5 million or $0.11 per share in the same quarter a year-ago.

PolyOne Corp. (NYSE:POL) shares declined 3.64 percent to $13.50 in aftermarket trading session. The stock has a 52 week low of $7.38 and 52 week high of $14.98 and has $1.32 billion market capitalization.