The top aftermarket NYSE losers on Thursday were: Harmony Gold Mining, MEMC Electronic Materials, Harry Winston Diamond, Accenture, Skilled Healthcare Group, Michael Kors Holdings, Diamond Offshore Drilling, Alpha Natural Resource, Aflac and MetLife.

Harmony Gold Mining Co. Ltd. (NYSE:HMY) shares slumped 7.15 percent to $11.03 in post-market trading sessions. The company announced that Finance Director Hannes Meyer had resigned and will leave the company with effect from March 14, 2012.

MEMC Electronic Materials Inc. (NYSE:WFR) shares plunged 3.92 percent to $3.65 in aftermarket trading sessions. The stock has a 52-week low of $3.65, a 52-week high of $15.04 and $845.81 million in market capitalization.

Harry Winston Diamond Corp. (NYSE:HWD) shares declined 3.47 percent to $3.47 percent to $9.8 in post-market trading sessions. The company stock declined more than 3 percent in regular trading sessions.

Accenture plc. (NYSE:ACN) shares declined 3.41 percent to $54.70 in aftermarket trading sessions. The company reported first quarter net income of $642.1 million or $0.96 per share, up from $534.7 million or $0.81 per share in the same quarter last year. For the second quarter, the company expects second quarter revenue to be in the range of $6.5 to $6.8 billion against analysts’ estimation of $6.6 billion.

Skilled Healthcare Group Inc. (NYSE:SKH) shares declined 3.3 percent to $5.08 in aftermarket trading sessions.

Michael Kors Holdings Ltd. (NYSE: KORS) shares declined 3.26 percent to $24.06 in aftermarket trading sessions.

Diamond Offshore Drilling Inc. (NYSE:DO) shares declined 3.26 percent to $54.66 in post-market trading sessions. The stock has a 52-week low of $51.16, a 52-week high of $81.19 and $7.60 billion in market capitalization.

Alpha Natural Resources Inc. (NYSE:ANR) shares declined 2.37 percent to $19.50 in aftermarket trading sessions. The stock has a 52-week low of $15.49, a 52-week high of $68.05 and $4.24 billion in market capitalization.

Aflac Inc. (NYSE:AFL) shares declined 1.99 percent to $41.42 in post-market trading sessions. Zacks Equity Research reiterated “neutral” rating on shares of AFL.

MetLife, Inc. (NYSE:MET) shares declined 1.96 percent to $30.47 in aftermarket trading sessions. The stock has a 52-week low of $25.61, a 52-week high of $48.72 and $32.11 billion in market capitalization.