The top after-market NYSE gainers on Wednesday are: Magnetek, Hartford Financial, Magna International, NeoPhotonics and 99 Cents Only Stores. The top after-market NYSE losers on Wednesday are: Ameriprise Financial, Ace, International Coal Group, Global Partners and InterXion Holding.

Gainers

Magnetek, Inc. (NYSE:MAG) shares gained 4.48 percent to $2.10 in post market trading session. The stock has a 52 week low of $0.84 and 52 week high of $2.15 and has $62.82 million market capitalization.

Hartford Financial Services (NYSE:HIG) shares advanced 4.33 percent to $29.14 in aftermarket trading session as the company raised its dividend for the first time since 2007 after reporting fourth quarter net income of $619 million or $1.24 per share.

Magna International Inc. (NYSE:MGA) shares gained 3.50 percent to $57.70 in aftermarket trading session. The company shares have risen more than 475 percent from their lows in March of 2009.

NeoPhotonics Corp. (NYSE:NPTN) shares advanced 2.94 percent to $13.64 in post market trading session. The company announced Thursday the pricing of its initial public offering of 7,500,000 shares of its common stock, at $11.00 per share.

99 Cents Only Stores (NYSE:NDN) shares advanced 2.70 percent to $15.20 in aftermarket trading session as the company raised its guidance for Income Before Taxes as a percentage of sales to approximately 8 percent for fiscal 2011.

Losers

Ameriprise Financial, Inc. (NYSE:AMP) shares plunged 6.36 percent to $58.50 in post market trading session as its fourth quarter profit fell short of analysts’ expectations. The company reported fourth quarter net income of $312 million or $1.21 per share against analysts’ estimation of $1.31 per share.

Ace Ltd. (NYSE:ACE) shares declined 5.12 percent to $59.30 in post market trading session as its earnings guidance for fiscal 2011 fell short of market expectations.

International Coal Group, Inc. (NYSE:ICO) shares declined 4.94 percent to $8.85 in aftermarket trading session. The company swung to fourth quarter profit of $9.6 million or 5 cents per share, compared with a loss of $11.3 million, or 7 cents per share in the same period a year-ago, while analysts’ expected a profit of 7 cents per share.

Global Partners LP (NYSE:GLP) shares declined 4.08 percent to $27.50 in post market trading session. The company said on Wednesday that it will be filing with the Securities and Exchange Commission a preliminary prospectus supplement for an offering of 2.3 million common units representing limited partner interests in Global Partners.

InterXion Holding N.V. (NYSE:INXN) shares declined 3.27 percent to $14.75 in post market trading session.

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