11 Biggest Private Companies in the World

7. Bechtel

Revenue: $39.4

The largest construction company in the United States, Bechtel was founded in 1898, when cattle rancher Warren A. Bechtel decided to use him teams of mules in the construction of the railroad. Some 30 years later, he won a contract to be one of the construction companies that would build Hoover Dam. Later, the company would be involved in projects around the world, like Eurotunnel,  Saudi Arabia’s major airports,  highways in Romania and Turkey and the world’s largest solar thermal power plant in California.