Company Information Company History: Mountain Laurel Assurance Company began as a Pennsylvania company in 1990 and changed its home state to Ohio in 2005. Mountain Laurel Assurance is a wholly owned subsidiary of Progressive Direct Holdings, Inc. which is a subsidiary of Progressive Corporation, a publicly traded holding company. Essentially all of Mountain Laurel's business is private and commercial auto insurance. In 2005, 85% of direct premium writings came from Tennessee and the rest from Pennsylvania. The Progressive Direct Holdings i ...