Liberty Mutual Group, more commonly known by the name of its primary line of business, Liberty Mutual Insurance, is an American diversified global insurer, and the fourth-largest property and casualty insurer in the United States. It ranks 76th on the Fortune 100 list of largest corporations in the United States based on 2013 revenue. Based in Boston, Massachusetts, it employs over 50,000 people in more than 900 locations throughout the world. As of December 31, 2015, Liberty Mutual Insurance had $121.7 billion in consolidated assets, $102.5 billion in consolidated liabilities, and $37.6 billion in annual consolidated revenue. The company, founded in 1912, offers a wide range of insurance products and services, including personal automobile, homeowners, workers' compensation, commercial multiple peril, commercial automobile, general liability, global specialty, group disability, fire and surety.