Energy Stocks: Winners and Losers

NEW YORK (TheStreet) -- Shares of Complete Production Services (CPX), Cobalt International Energy (CIE), Gran Tierra Energy (GTE) and ReneSola (SOL) made gains last week, while shares of First Solar (FSLR), Superior Energy Services (SPN), Chesapeake Midstream Partners (CHKM) and TransAtlantic Petroleum Ltd. (TAT) fell.

Complete Production Services led the pack of winners last week, gaining 53.2%.

Cobalt International Energy rose 26.4%.

Gran Tierra Energy improved 25.3%. The company starts exploration drilling operations on two oil prospects in Brazil, as per International Resource News.

ReneSola increased 23.8%.

Other movers were Frontline Ltd. ( FRO) (up 23.0%), Oasis Petroleum ( OAS) (up 22.7%), Forest Oil Corp ( FST) (up 22.6%) and Denbury Resources Inc ( DNR) (up 22.0%).

Range Resources Corp ( RRC) gained 20.8%. According to Bloomberg, the company rose on speculation of a takeover bid. Range Resources is a holder of 1.2 million net acres in the Marcellus Shale natural gas field.

Oil States International Inc ( OIS) added 20.2%. The company was upgraded to overweight from equal weight at Johnson Rice.

Precision Drilling Corp. ( PDS) added 19.9%. The company was rated a new accumulate at Global Hunter Securities. The 12-month target price is $13.0 a share.

Helix Energy Solutions Group ( HLX) and Trina Solar ( TSL) climbed 19.9% and 19.6%, respectively.

Valero Energy Corp ( VLO) gained 19.4%. The company was raised to overweight from equal-weight at Barclays capital. The 12-month target price is $35.0 a share.

On average, Advantage Oil & Gas ( AAV), Key Energy Services ( KEG), Brigham Exploration Co ( BEXP), Tesoro Corp ( TSO) and Berry Petroleum Co ( BRY) closed 17%-18% higher last week.

Talisman Energy Inc ( TLM) rose 14%. The company was raised to outperform from market perform.

First Solar was the top decliner, plunging 5.9%.

Superior Energy Services and Chesapeake Midstream Partners shed 2.9% and 1.9%, respectively.

TransAtlantic Petroleum lost 1.3%. The company was cut to accumulate from buy at Global Hunter Securities.

JA Solar Holdings ( JASO) and China Petroleum & Chemical ( SNP) each lost 0.5% last week.

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