The top after-market NYSE gainers Thursday were Herbalife Ltd, Ellie Mae, Nu Skin Enterprises, Calpine Corp and Just Energy Group. The top after-market NYSE losers were Active Network, Agilent Technologies, B&G Foods, On Assignment and Key Energy Services.

Gainers

Herbalife Ltd. (NYSE:HLF) shares rallied 23.73 percent to $47.35 in the post-market trading on news that Carl Icahn, the billionaire investor, bought 14 million shares or 13 percent stake in Herbalife.

Ellie Mae, Inc. (NYSE:ELLI) shares climbed 10.15 percent to $23.00 in post-market trading. The company reported the fourth quarter adjusted net profit of $0.27 per share, up from $0.13 per share in the same period last year and also topped the analysts’ estimate of $0.21 per share.

Nu Skin Enterprises, Inc. (NYSE:NUS) shares gained 4.94 percent to $44.00 in post-market trading. The stock has a 52-week low of $32.36, a 52-week high of $62.01 and $2.46 billion in market capitalization.

Calpine Corp. (NYSE:CPN) shares rose 3.84 percent to 419.42 in post-market trading. The company stock plunged more than 3.5 percent in regular trading.

Just Energy Group, Inc. (NYSE:JE) shares advanced 2.75 percent to $7.85 in post-market trading. The company stock tumbled nearly 9 percent in regular trading.

Losers

Active Network Inc. (NYSE:ACTV) shares tumbled 10.45 percent to $4.97 in post-market trading. Its fourth quarter net loss widened to $14.34 million or $0.24 per share from $8.48 million or $0.16 per share in the same period last year and also came in worse than Reuters’ estimate of a loss of $0.11 per share.

Agilent Technologies Inc. (NYSE:A) shares slumped 8.03 percent to $41.00 in post-market trading. The company reported the first quarter adjusted net income of $222 million or $0.63 per share, down from $244 million or $0.69 per share in the same period last year and also fell short of the analysts’ estimate of $0.67 per share.

B&G Foods, Inc. (NYSE:BG) shares plunged 7.38 percent to $29.86 in post-market trading. The company swung to the fourth quarter net loss of $610 million or $4.17 per share compared to net profit of $245 million or $1.65 per share in the same period a year-earlier.

On Assignment Inc. (NYSE:ASGN) shares declined 5.92 percent to $23.20 in post-market trading. The stock has a 52-week low of $13.13, a 52-week high of $25.10 and $1.30 billion in market capitalization.

Key Energy Services Inc. (NYSE:KEG) shares fell 3.63 percent to $8.50 in post-market trading. The stock has a 52-week low of $5.70, a 52-week high of $18.18 and $1.33 billion in market capitalization.

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