Amerisure insurance AGENCIES in Missouri At Amerisure, we partner with an exclusive group of high-performing independent agencies that share our values and deliver industry-leading commercial insurance solutions. Amerisure’s Partners For Success® program recognizes a progression of levels an agency can achieve: Partner, Premier, Platinum and Diamond. To find an Agency serviced by one of our Core Service Centers (CSCs), please click on the location nearest you or search by agency program level. Diamond Agencies Charles L Crane Agency Co St. Louis, MO (314) 241-8700 www.craneagency.com Platinum Agencies J.W. Terrill, A Marsh & McLennan Agency, LLC Chesterfield, MO (314) 594-2700 www.jwterrill.com Premier Agencies Cornerstone Insurance Group St. Louis, MO (314) 373-2900 www.cornerstoneinsurancegroup.com C.J. Thomas Company, Inc St. Louis, MO (314) 231-1717 www.cjthomas.com