Chevron ended 2011 on a sour note: Despite rising oil prices, the company posted its biggest profit decline in two years, largely due to losses at its U.S. refinery business. Still, the second-largest oil and gas company in the U.S. managed to post a 25% increase in revenues during the full year, to $245.6 billion, and an impressive 41% jump in profits, to $26.9 billion. Chevron is spending heavily on oil and gas projects in places like Australia, Africa, and the Gulf of Mexico -- projects that are expected to start paying off in 2014. 

Chevron also continues to keep its lawyers gainfully employed. In addition to multiple ongoing legal battles, including a longstanding one in Ecuador, Chevron is now fighting an $11 billion suit brought against it for an oil spill late last year in Brazil. It's also still cleaning up after a natural gas rig in Nigeria exploded earlier this year.