American Physicians Service Group, Inc. is engaged in providing insurance services, specifically medical professional liability insurance, and financial services, including brokerage and other investment services to individuals and institutions. The Company offers services, such as Insurance Services and Financial Services. Approximately 92% of its premiums are written through purchasing groups. During the year ended December 31, 2009, approximately 5% and 3% of its premiums were written in Oklahoma and Arkansas, respectively. In December 2010, ProAssurance Corporation acquired the Company.