The top after-market NYSE gainers on Monday are: Marriot International, PMI Group, Aspen Insurance Holdings, Sandridge Energy and United Microelectronics. The top after-market NYSE losers are: Gray Television, Masco, DCT Industrial Trust, Mack-Cali Realty and Titanium Metals.

Gainers

Marriot International Inc. (NYSE:MAR) shares surged 4.63 percent to $42.90 in aftermarket trading session. The company reported fourth quarter net income of $0.39 per share and said it plans to spin-off its timeshare business into a separate company.

PMI Group, Inc. (NYSE:PMI) shares advanced 2.45 percent to $3.34 in post market trading session. The stock has a 52 week low of $2.18 and 52 week high of $7.75 and has $525.41 million market capitalization.

Aspen Insurance Holdings Ltd. (NYSE:AHL) shares advanced 2.24 percent to $30.19 in post market trading session.

Sandridge Energy Inc. (NYSE:SD) shares advanced 2.06 percent to $8.90 in post market trading session. The company stock was upgraded to “neutral” rating from “underperform” rating on Friday at Zacks Investment Research.

United Microelectronics Corp. (NYSE:UMC) shares advanced 1.97 percent to $3.06 in post market trading session.

Losers

Gray Television, Inc. (NYSE:GTN) shares plunged 6.35 percent to $2.15 in post market trading session. Its shares surged 9 percent to $2.30 in regular trading session.

Masco Corp. (NYSE:MAS) shares declined 5.21 percent to $13.45 in aftermarket trading session after the company said its fourth quarter loss widened $1.03 billion or $2.96 per share compared to $185 million or $0.53 per share last year. It also expects a challenging business environment, particularly in the first half of 2011.

DCT Industrial Trust Inc. (NYSE:DCT) shares declined 5.04 percent to $5.28 in aftermarket trading session after the company announced that it has commenced a public offering of 19,000,000 shares of common stock.

Mack-Cali Realty Corp. (NYSE:CLI) shares declined 4.68 percent to $33.00 in post market trading session after the company announced that it has commenced a public offering of 5,500,000 shares of common stock.

Titanium Metals Corp. (NYSE:TIE) shares declined 4.21 percent to $19.57 in post market trading session. The stock has a 52 week low of $10.80 and 52 week high of $22.93 and has $3.68 billion market capitalization.

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