Many small firms in Sweden are characterized by a lack of equity capital. For several years measures to increase the equity capital have been discussed. In this discussion the private investors’ market has received virtually no attention. This study presents some preliminary results of the private investors in Sweden. The research in small firms financing is characterized by a lack of theoretical framework. One basic assumption in the study is that agency theory can provide an essential framework to explain the interaction between the private investor and entrepreneur. Twenty-five hypotheses generated from agency theory are formulated and tested on 62 small unlisted firms in Sweden. Multiple regression analysis is used for the causal analyses. The empirical results in the study show inter alia that the geographic distance and the private investor’s knowledge about the portfolio firm’s transformation process seem to be the most influential factors for determining the private investor’s involvement in the portfolio firms. It is also interesting to notice that none of the variables, frequency of contacts and the private investor’s operational work in the portfolio firm affect the performance of the firm. Contrary to conventional wisdom, private investors do not add value to their portfolio firms through their interaction with the entrepreneurs. The theoretical conclusion is that agency theory does not provide any satisfactory framework to explain the private investor -entrepreneur relationship. Some of the basic assumptions in agency theory seem to be invalid. A model for the relationship between private investors and entrepreneurs is developed in which four interaction strategies are identified. The model gives implications on two levels: the portfolio level and the individual case level. © 1992 Taylor & Francis Group, LLC.