The top after-market NYSE gainers Tuesday were Williams-Sonoma, Cobalt International Energy, AmerisourceBergen Corp, Puma Biotechnology and Forest Oil Corp. The top after-market NYSE losers were New Mountain Finance, RLJ Lodging Trust, LyondellBasell Industries, Tidewater and Ingredion Inc.

Gainers

Williams-Sonoma, Inc. (NYSE:WSM) shares climbed 5.93 percent to $47.89 in post-market trading. The company reported fourth quarter net profit of $133.7 million or $1.34 per share, up from $122.6 million or $1.17 per share in the same period last year and also topped Reuters' estimate of $1.29 per share.

Cobalt International Energy, Inc. (NYSE:CIE) shares surged 4.69 percent to $27.00 in post-market trading. The company announced Tuesday that the Shenandoah #2R appraisal well encountered more than 1,000 net feet of oil pay in multiple high quality lower tertiary-aged reservoirs. Log and pressure data from both the Shenandoah appraisal well and the 2009 Shenandoah discovery well indicate the presence of exceptionally high quality reservoirs and hydrocarbons.

AmerisourceBergen Corp. (NYSE:ABC) shares surged 2.62 percent to $51.37 in post-market trading. The stock has a 52-week low of $35.48, a 52-week high of $52.15 and $14.18 billion in market capitalization.

Puma Biotechnology Inc. (NYSE:PBYI) shares advanced 2.32 percent to $28.43 in post-market trading. The stock has a 52-week low of $10.00, a 52-week high of $29.70 and $796.60 million in market capitalization.

Forest Oil Corp. (NYSE:FST) shares gained 2.16 percent to $5.85 in post-market trading. The company stock plunged more than 7 percent in regular trading.

Losers

New Mountain Finance Corp. (NYSE:NMFC) shares plunged 3.42 percent to $14.14 in post-market trading. The company announced Tuesday that it has commenced an underwritten primary offering of 2,000,000 shares of its common stock and a concurrent underwritten secondary offering of 4,000,000 shares of its common stock on behalf of a selling stockholder.

RLJ Lodging Trust (NYSE:RLJ) shares plunged 2.76 percent to $21.52 in post-market trading. The company announced the commencement of an underwritten public offering of 11,500,000 common shares of beneficial interest.

LyondellBasell Industries NV (NYSE:LYB) shares declined 2.36 percent to $62.50 in post-market trading. The stock has a 52-week low of $35.97, a 52-week high of $65.69 and $51.75 billion in market capitalization.

Tidewater Inc. (NYSE:TDW) shares fell 2.01 percent to $47.05 in post-market trading. The stock has a 52-week low of $42.33, a 52-week high of $56.73 and $2.37 billion in market capitalization.

Ingredion Inc. (NYSE:INGR) shares declined 1.86 percent to $67.56 in post-market trading. The stock has a 52-week low of $45.30, a 52-week high of $70.42 and $5.32 billion in market capitalization.

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