The Cincinnati Insurance Companies | 61,014 followers on LinkedIn. Everything Insurance Should Be | The Cincinnati Insurance Company, operating since 1950, stands among the nation's top 25 property casualty insurer groups based on net written premiums. The group markets business, home and auto insurance products through a select group of independent insurance agencies in 46 states and the District of Columbia. The Cincinnati Life Insurance Company subsidiary actively markets life and disability income insurance and annuities in all states except New York