Hartford is also the historic international center of the insurance industry, with companies like Aetna, Conning & Company, The Hartford, Harvard Pilgrim Health Care, The Phoenix Companies, and Hartford Steam Boiler based in the city, and companies such as Prudential Financial, Lincoln National Corporation, Travelers, United Healthcare and Axa XL having major operations in the city. Insurance giant Aetna had its headquarters in Hartford before announcing a relocation to New York City in July 2017. However, when CVS acquired Aetna a few months later, they announced Aetna would remain in Hartford for at least four years. The city is also home to the corporate headquarters of U.S. Fire Arms, and Virtus Investment Partners.