The top aftermarket NYSE gainers Monday were: Resolute Energy, Armstrong World Industries, Nautilus Group, GNC Holdings, Cameco Corp and Beam Inc. The top aftermarket NYSE losers were: InvenSense, Safe Bulkers, China Mass Media Corp, Yelp Inc, MarkWest Energy Partners and Sunoco Logistics Partners LP.

Gainers:

Resolute Energy Corp. (REN) shares climbed 7.71 percent to $10.90 in aftermarket trading. The company reported fourth quarter net loss of $16.0 million or $0.27 per share compared to $10.5 million or $0.21 per share in the same period last year.

Armstrong World Industries Inc. (AWI) shares surged 6.35 percent to $54.46 in post market session. The company announced that its Board of Directors is considering the payment to shareholders of a special cash dividend of about $500 million in total.

Nautilus Group Inc. (NLS) shares surged 5.28 percent to $2.79 in post market trading. The company swung to fourth quarter net income of $3.2 million or $0.11 per share compared to net loss of $39,000 in the same period a year-ago.

GNC Holdings Inc. (GNC) shares surged 4.91 percent to $32.89 in aftermarket session. The company announced that it currently expects to outperform its previously stated first quarter 2012 EPS guidance of approximately $0.49.

Cameco Corp. (CCJ) shares gained 3.84 percent to $24.60 in aftermarket session. The stock has a 52-week low of $16.59, a 52-week high of $38.02 and $9.35 billion in market capitalization.

Beam Inc. (BEAM) shares advanced 3.59 percent to $58.00 in post market session. The stock has a 52-week low of $42.30, a 52-week high of $65.48 and $8.77 billion in market capitalization.

Losers:

InvenSense Inc. (INVN) shares slumped 10.79 percent to $17.06 in aftermarket trading session. The company stock surged more than 7 percent in regular session.

Safe Bulkers Inc. (SB) shares plunged 7.97 percent to $6.58 in post market trading session. The company announced that it plans to offer 5,000,000 shares of its common stock to the offering.

China Mass Media Corp. (CMM) shares plunged 7.13 percent to $3.65 in aftermarket trading session.

Yelp Inc. (YELP) shares fell 3.99 percent to $21.59 in post market session. The company stock climbed more than 13 percent in regular trading.

MarkWest Energy Partners, LP (MWE) shares declined 3.56 percent to $59.33 in post market trading. The company announced Monday that it is commencing a public offering of 5,900,000 common units.

Sunoco Logistics Partners LP (SXL) shares declined 2.41 percent to $37.60 in aftermarket trading. The stock has a 52-week low of $24.40, a 52-week high of $42.11 and $3.99 billion in market capitalization.

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