WIS International was formed with the merger of Washington Inventory Service and Western Inventory Service. Washington Inventory Service is one of the oldest national inventory services in the United States with nearly 50 years of experience. The company has conducted more than 1 million physical inventories in all 50 states in addition to Europe, South America and Asia. Washington Inventory Service services all retail classes of trade from convenience stores to large department store chains. Western Inventory Service was one of the largest inventory service companies in Canada and Washington Inventory Service was the second largest provider of inventory services throughout the world. Combined, the company has nearly 200 offices throughout the United States, Canada, Latin and South America, Europe and Asia. Headquartered in Mississauga, Ontario, WIS International is a privately owned company. WIS International has a branch located in Portland, Ore., where it employs nearly 125 people.