The top aftermarket NYSE gainers Thursday were: Parker Drilling, Quicksilver Resources, MEMC Electronic Materials, Penn Virginia Corp, Medifast and McDermott International. The top aftermarket NYSE losers were: Martha Stewart Living Omnimedia, LDK Solar Co, Cooper Companies, InvenSense, Frontline Ltd and Thor Industries.

Gainers:

Parker Drilling Co (PKD) shares climbed 5.4 percent to $6.05 in aftermarket session. The company stock plunged nearly 4 percent in regular session.

Quicksilver Resources Inc (KWK) shares surged 3.53 percent to $4.98 in post market trading.

MEMC Electronic Materials Inc (WFR) shares advanced 2.9 percent to $3.55 in aftermarket session. The stock has a 52-week low of $3.36, a 52-week high of $12.69 and $832.41 million in market capitalization.

Penn Virginia Corp (PVA) shares advanced 2.84 percent to $4.35 in post market session.

Medifast Inc (MED) shares gained 2.29 percent to $18.80 in post market session after surging nearly 6 percent in regular trading.

McDermott International Inc (MDR) shares rose 2.1 percent to $12.43 in post market session. The stock has a 52-week low of $9.34, a 52-week high of $25.94 and $2.87 billion in market capitalization.

Losers:

Martha Stewart Living Omnimedia Inc (MSO) shares slumped 7.65 percent to $3.50 in aftermarket session.

LDK Solar Co Ltd (LDK) shares fell 2.37 percent to $3.30 in post market session after declining more than 3 percent in regular trading.

Cooper Companies Inc (COO) shares declined 2.29 percent to $81.84 in post market trading. The company stock gained nearly 4 percent in regular trade after announcing that the US Food and Drug Administration has granted a Special 510(k) clearance for CooperVision's Avaira Toric two-week silicone hydrogel contact lenses for astigmatism.

InvenSense Inc (INVN) shares declined 1.76 percent to $15.60 in post market trading after plunging nearly 7 percent in regular session.

Frontline Ltd (FRO) shares fell 1.57 percent to $6.91 in post market session. The stock has a 52-week low of $2.52, a 52-week high of $24.47 and $546.57 million in market capitalization.

Thor Industries Inc (THO) shares declined 1.51 percent to $31.70 in post market session. The stock has a 52-week low of $17.62, a 52-week high of $34.17 and $1.70 billion in market capitalization.

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