The top after-market NYSE gainers Friday were Tenet Healthcare Corp, ResMed, Delphi Automotive, Community Health Systems and Heckmann Corp. The top after-market NYSE losers were Skilled Healthcare Group, Kirby Corp, Marathon Petroleum Corp, HollyFrontier Corp and Pier 1 Imports Inc.

Gainers

Tenet Healthcare Corp. (THC) shares surged 3.99 percent to $24.26 in post-market trading. The stock has a 52-week low of $16.20, a 52-week high of $26.96 and $2.43 billion in market capitalization.

ResMed Inc. (RMD) shares gained 3.63 percent to $41.37 in post-market trading. The company stock plunged more than 3 percent in regular trading after it was downgraded to a “neutral” rating from an “outperform” rating.

Delphi Automotive Plc (DLPH) shares advanced 3.12 percent to $31.45 in post-market trading. The company announced Friday the completion of its acquisition of FCI Group’s Motorized Vehicles Division.

Community Health Systems Inc. (CYH) shares gained 3.10 percent to $27.61 in post-market trading. The stock has a 52-week low of $15.97, a 52-week high of $30.00 and $2.44 billion in market capitalization.

Heckmann Corp. (HEK) shares advanced 2.50 percent to $3.69 in post-market trading. The company announced Friday that its wholly-owned subsidiary, Rough Rider Escrow Inc., has priced its previously announced offering of $150,000,000 in aggregate principal amount of 9.875 percent senior notes due 2018 to be sold in a private placement to qualified institutional buyers within the United States and to non-U.S. persons outside of the United States.

Losers

Skilled Healthcare Group Inc. (SKH) shares tumbled 12.48 percent to $6.59 in post-market trading. The company stock surged more than 9 percent in regular trading.

Kirby Corp. (KEX) shares plunged 5.14 percent to $55.13 in post-market trading. The stock has a 52-week low of $42.78, a 52-week high of $70.61 and $3.25 billion in market capitalization.

Marathon Petroleum Corp. (MPC) shares declined 3.04 percent to $53.92 in post-market trading. The stock has a 52-week low of $30.24, a 52-week high of $60.04 and $18.81 billion in market capitalization.

HollyFrontier Corp. (HFC) shares declined 2.91 percent to $37.75 in post-market trading.

Pier 1 Imports Inc. (PIR) shares declined 2.85 percent to $19.75 in post-market trading. The stock has a 52-week low of $11.79, a 52-week high of $20.85 and $2.16 billion in market capitalization.

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