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7. L-3 Communications (LLL)

Contracted in 2011: $7.38 billion
Total 2011 revenue: $15.17 billion
Contracted in 2012, so far: $2.79 billion
Company Profile

L-3 describes itself as a “prime contractor in command, control, communications, intelligence surveillance and reconnaissance systems; aircraft modernization; and maintenance and government services.”

According to USASpending, The Department of the Air Force accounted for $3.4 billion in contracts with the company. L-3's highest contracts in 2011 were awarded for miscellaneous aircraft accessories and maintenance repair for aircraft.

According to its 2011 annual report, the company derived 75% of its 2011 revenues from the Department of Defense, while the remainder came from foreign governments. Compared to a year earlier, contracts won by L-3 Communications have dropped significantly, from $14.9 billion in 2010 to $7.83 billion in 2011.

Pictured: L3 Communications' Mobius, Optionally piloted Aircraft System, flies by during the Association for Unmanned Vehicle Systems International (AUVSI) demonstration day at Naval Air Station Pax River Webster Field Annex in St. Inigoes, Maryland.

Photo: Jim Watson | AFP | Getty Images