Mesirow Insurance Services, Inc., an Alliant-owned company, (“Alliant”) was established in 1925 in San Diego, California as the Robert F. Driver Company. Today, it is a privately held corporation headquartered in Newport Beach, California. As a firm, we are the largest specialty broker in the country, with our entire focus on selected industry segments including healthcare, public entity, education, construction, real estate, tribal nations, hospitality, non-profits, and legal professionals. With over 3,700 employees, 110+ offices nationwide, $15.6 billion in placed premium, and revenues of $1.4 billion, Business Insurance ranks Alliant as one of the largest privately held brokers in the nation.