Total return: 68%
Fortune 500 rank: 448
Emcor focuses on electrical and mechanical construction, energy infrastructure and facilities services, so its business lines are prone to cyclical downturns and easing oil prices. But it also has one of the industry's strongest balance sheets and relatively little debt, and in 2006 it pulled off one of its best quarters ever. Emcor also has global operations and diverse mechanical and electrical divisions that help shield it from macroeconomic bumps. Weak oil prices could weigh on earnings in the current year.
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