YTD performance: 44%
Market cap: $15.2 billion
Shares of El Paso Corp. (EP), owner of the nation's largest natural gas pipeline network, got a boost from increased investor interest in natural gas and stronger-than-expected earnings.
The company recently raised its full-year guidance to between $1and $1.10 a share, citing higher oil and gas prices.
Investors also responded positively to El Paso's decision last month to spin off its natural gas exploration and production division into a separate company, allowing El Paso to focus solely on its pipeline, transportation and distribution businesses.
NEXT: #2 Cabot Oil & Gas