NEW YORK (TheStreet) -- Anadarko Petroleum (APC), Petroleo Brasileiro (Petrobras) (PBR), and Targa Resources Partners (NGLS) emerged top gainers, while RPC (RES), LDK Solar (LDK), and ReneSola (SOL) headed the losers' list.Anadarko jumped 11.1% last week, hitting 52-week highs on Friday. The company, which owns a share of BP Plc. ( BP), surged 6.9% on Thursday, reportedly on news that BHP Billiton ( BHP) may bid $90 a share for Anadarko. Petrobras, a stock trading at discount with an upside, gained around 10.4% last week. The company announced an average oil production of 2.12 million barrels a day in Brazil for December, up 4.4% from November and a record for the company. Meanwhile, Petrobras Energia Participaciones ( PZE), Petrobras' Argentina subsidiary, advanced around 9.2%. Targa Resources Partners, Chesapeake Midstream Partners ( CHKM), TC Pipelines ( TCLP), and Copano Energy ( CPNO) gained around 6.9%, 6.2%, 5.7%, and 5.7%, respectively. Legacy Reserves ( LGCY), a highly-rated stock, rose 4.9% after Wunderlich rated the stock "new buy" with a price target of $31, implying an 8% upside from current levels. Ecopetrol ( EC) reversed losses registered in the penultimate week and gained around 3.9%. Energy Transfer Partners ( ETP) and FMC Technologies ( FTI) scaled up 3.6% and 2.9%, respectively. Wunderlich rated Energy Transfer Partners a "new buy" with a price target of $60, implying an impressive 16% upside from current levels. Meanwhile, the price target for FMC technologies was raised to $108 from $80 at Pritchard. Among other gainers, Cheniere Energy Partners ( CQP), Sasol ( SSL), and Comstock Resources ( CRK) advanced 4.9%, 4.5%, and 3.7%, respectively. RPC led the pack of losers, declining 5.1%. Following RPC, LDK Solar and ReneSola fell around 4.4% and 3.6%, respectively, as investors stayed away from solar stocks. Meanwhile, other solar players JA Solar Holdings ( JASO), Suntech Power Holdings ( STP), and Yingli Green Energy ( YGE) trimmed nearly 2.9%, 2.4%, and 2.2%, respectively. Oasis Petroleum ( OAS) fell 2.4%, despite Northland Securities' new outperform rating with a price target of $38, implying a remarkable 40% upside. Among other losers, Complete Production Services ( CPX), Helix Energy Solutions ( HLX), and Seacor Holdings ( CKH) dropped around 3.0%, 2.9%, and 2.0%, respectively.