The top after-market NYSE gainers Thursday were Geo Group, Cenveo, Enbridge, Corrections Corp and Enterprise Products Partners. The top after-market NYSE losers were QR Energy, Palo Alto Networks, Harry Winston Diamond, Mechel and DigitalGlobe Inc.

Gainers

Geo Group Inc. (GEO) shares climbed 6.45 percent to $31.34 in pre-market trading. The company announced Thursday that its board declared a special dividend of $5.68 per share of common stock, representing approximately $350 million of accumulated earnings and profits, payable Dec 31, 2012, to shareholders of record as of Dec 12, 2012.

Cenveo Inc. (CVO) shares surged 5.42 percent to $2.49 in post-market trading. The company stock plunged more than 3.5 percent in regular trading.

Enbridge Inc. (ENB) shares gained 2.83 percent to $41.49 in post-market trading. The company announced Thursday that its Board of Directors had declared a quarterly dividend of $0.315 per common share, payable March 1, 2013 to shareholders of record on Feb. 15, 2013.

Corrections Corp of America (CXW) shares rose 2.52 percent to $34.97 in post-market trading. The stock has a 52-week low of $20.16, a 52-week high of $35.73 and $3.41 billion in market capitalization.

Enterprise Products Partners L.P. (EPD) shares advanced 2.35 percent to $50.89 in post-market trading. The company stock was reiterated with a “buy” rating at Zacks Research.

Losers

QR Energy LP (QRE) shares plunged 4.55 percent to $16.14 in post-market trading. The company announced Thursday that it had commenced an underwritten public offering of 12,000,000 common units representing limited partner interests in QRE.

Palo Alto Networks Inc. (PANW) shares plunged 4.19 percent to $49.15 in post-market trading. The company swung to the first quarter net loss of $3.5 million or $0.05 per share compared to the net income of $4.1 million or breakeven per share in the same period last year.

Harry Winston Diamond Corp. (HWD) shares declined 3.89 percent to $13.85 in post-market trading. The company swung to the third quarter net profit of $3.4 million or $0.04 per share compared to net loss of 4.7 million or $0.06 per share but fell short of Reuters’ estimate of a net income of $0.11 per share.

Mechel OAO (MTL) shares declined 3.53 percent to $6.01 in post-market trading. The stock has a 52-week low of $5.08, a 52-week high of $12.37 and $2.59 billion in market capitalization.

DigitalGlobe Inc. (DGI) shares fell 3.06 percent to $25.31 in post-market trading. The company stock climbed more than 6 percent in regular trading.