The top aftermarket NYSE gainers Monday were: Monster Worldwide, Sony Corp, Giant Interactive Group, Heckmann Corp, RPC and NetQin Mobile Inc. The top aftermarket NYSE losers: RAIT Financial Trust, Darling International, Plains All American Pipeline, AllianceBernstein Holding and Equity One.

Gainers:

Monster Worldwide, Inc. (MWW) shares climbed 7.71 percent to $8.10 in aftermarket trading session. The company hired Stone Key Partners LLC and Bank of America Corp.’s Merrill Lynch to help it review strategic alternatives, Bloomberg reported.

Sony Corp (SNE) shares surged 4.68 percent to $21.70 in aftermarket trading session. The stock has a 52-week low of $16.16, a 52-week high of $36.07 and $20.80 billion in market capitalization.

Giant Interactive Group Inc. (GA) shares gained 2.61 percent to $4.72 in post market trading session. The company reported fourth quarter adjusted net profit of $0.17 per American Depositary Share (ADS) compared to analysts’ estimation of $0.07 per share ADS. Net revenue was $78.6 million, up 34.4 percent from the same quarter 2010.

Heckmann Corp. (HEK) shares advanced 2.09 percent to $5.37 in aftermarket trading session.

RPC, Inc. (RES) shares advanced 1.79 percent to $14.75 in post market trading session. The company stock plunged nearly 7 percent in regular trading session.

NetQin Mobile Inc. (NQ) shares advanced 1.77 percent to $8.64 in aftermarket trading session. The company swung to fourth quarter net profit of $3.2 million or $0.013 per share compared to net loss of $10.5 million or $0.33 per share in the same period a year-ago.

Losers:

RAIT Financial Trust (RAS) shares slumped 5.8 percent to $5.20 in aftermarket trading session. RAIT announced that it has commenced an underwritten public offering of 6,950,000 common shares.

Darling International Inc. (DAR) shares declined 3.06 percent to $16.46 in post market trading session. The stock has a 52-week low of $11.24, a 52-week high of $19.62 and $1.99 billion in market capitalization.

Plains All American Pipeline, L.P. (PAA) shares fell 3.05 percent to $79.85 in aftermarket trading session. The company announced that it has commenced, subject to market conditions, an underwritten public offering of 5,000,000 of its common units representing limited partner interests.

AllianceBernstein Holding LP (AB) shares declined 2.14 percent to $14.34 in aftermarket trading session.

Equity One, Inc. (EQY) shares declined 1.97 percent to $18.95 in post market trading session. The company announced a public secondary offering of 4,060,606 shares of its outstanding common stock by CSC Ventures Limited, a stockholder of the Company and subsidiary of Capital Shopping Centres Group PLC.

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