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10. Nationwide Mutual Insurance

2010 Revenue: $21 billion
One-Year Growth: 0.0%

Nationwide Mutual Insurance is one of the largest insurance and financial services companies in the world, with more than $135 billion in statutory assets.

In 2009, a wholly owned subsidiary of Nationwide, Nationwide Corp., purchased all of the outstanding shares of common stock of Nationwide Financial Services (NFS) that it did not already own. As a result, NFS became a wholly owned subsidiary of Nationwide and a private company.

Despite record-breaking home foreclosures throughout much of the U.S., the insurance giant didn’t lose any ground from 2009 to 2010.

Source: PrivCo, Nationwide

Photo: Nick Juhasz | Wikimedia Commons