The top after-market NYSE losers on Thursday are: Paragon Shipping, Boardwalk Pipeline Partners, Georgia Gulf Corp, Moneygram International, First Commonwealth Financial, Vaalco Energy, Weight Watchers International, Allied Irish Banks, Federal Signal Corp. and Credicorp Ltd.

Paragon Shipping Inc. (NYSE:PRGN) shares plunged 4.3 percent to $2.67 in post market trading session. Its first quarter net income declined to $5.4 million or $0.09 per share compared to $9.2 million or $0.18 per share in the same quarter last year.

Boardwalk Pipeline Partners L.P. (NYSE:BWP) shares declined 3.49 percent to $29.05 in aftermarket trading session. The company announced that it plans to offer 6,000,000 common units representing limited partner interests in a registered offering.

Georgia Gulf Corp. (NYSE:GGC) shares declined 2.75 percent to $27.18 in aftermarket trading session. The stock has a 52 week low of $11.11 and 52 week high of $40.59 and has $949.42 million market capitalization.

Moneygram International, Inc. (NYSE:MGI) shares declined 2.57 percent to $3.50 in aftermarket trading session. The company stock surged 7.78 percent in regular trading session.

First Commonwealth Financial Corp. (NYSE:FCF) shares declined 2.19 percent to $5.58 I post market trading session.

Vaalco Energy Inc. (NYSE:EGY) shares declined 2.16 percent to $6.81 in aftermarket trading session.

Weight Watchers International Inc. (NYSE:WTW) shares declined 2.05 percent to $84.00 in post market trading session. The stock has a 52 week low of $24.47 and 52 week high of $86.97 and has $6.26 billion market capitalization.

Allied Irish Banks, plc. (NYSE:AIB) shares declined 1.89 percent to $2.60 in post market trading session.

Federal Signal Corp. (NYSE:FSS) shares declined 1.81 percent to $6.23 in aftermarket trading session.

Credicorp Ltd. (NYSE:BAP) shares declined 1.65 percent to $102.98 in aftermarket trading session.