Main Street Insurance Group was founded in 1923 under the name National Grange Mutual Insurance Company (NGM). 2005 brought more changes, changing from a Mutual Company to a mutual holding structure, thus creating Main Street America Group. Operating under 8 names in Minnesota and throughout the United States and soon to add a few more. You might know the names… American Family Insurance, The General, Homesite, and AssureStart. Offering auto, homeowners, dwelling fire, small business, contractors, restaurants, commercial auto and workers compensation insurance, and more.