A longitudinal study of the international behaviour of Swedish suppliers is presented. Three different types of supplier are identified: simple suppliers, advanced suppliers, and own product suppliers. Factors influencing the internationalisation of these suppliers are discussed. It is concluded that the firms' offer and the customers' buying strategies influence the firms' international behaviour. However, these factors do not determine the international strategies completely. Various entrepreneurs will choose various strategies. Three different types of entrepreneurs are identified: the marketing, technical, and structural entrepreneurs. The type of entrepreneur influences the firms' international strategies in different directions.