Liberty Mutual Group is an American diversified global insurer, and the fourth-largest property and casualty insurer in the United States. Based in Boston, Massachusetts, it employs over 50,000 people in more than 900 locations throughout the world. As of December 31, 2016, Liberty Mutual Insurance had $121.7 billion in consolidated assets, $102.5 billion in consolidated liabilities, and $38.3 billion in annual consolidated revenue. The company, founded in 1912, offers a wide range of insurance products and services.