The HUB International Wolf Point MT insurance office was originally founded as Hartford Ins. Co. on January 1st 1946 by W.E. Burnison, who first set up shop in the Moe Motors building on Main Street, Wolf Point MT. Hartford Ins. Co. was the only Company represented at that time. The growth of the Agency continued from that time forward and in 1952, Mr. Burnison built the building that presently houses the agency. In 1970, after many years of service to the community and the surrounding area, Mr. Burnison sold his book of business to N.C. Wolfe of Scobey and Richard P. Carney of Glendive. Since both men owned and operated insurance businesses in their communities, it was necessary for the employment of a Manager. The Agency continued to be operated under various Managers until April 1st, 1981, at that time, Michael H. Cassidy became a partner in the firm. This merge brought about the change of the Burnison Insurance Agency to the present Cassco Insurance.

In April of 1984, Michael H. Cassidy, purchased the Agency from Carney and Wolfe and continued to operate under the Cassco Insurance. In March of 2017, Cassco became part of HUB International. Mountain States, retaining their current employees and Mike Cassidy.