We examine whether, and to what extent, shareholder voting rights affect institutional investment decisions. We find that institutional ownership in dual-class firms is significantly lower than it is in single-class firms after controlling for other determinants of institutional investment. Although institutions of all types hold fewer shares of dual-class firms, this avoidance is more pronounced for long-term investors with strong fiduciary responsibilities than for short-term investors with weak fiduciary duties. Following the unification of dual-class shares into a single class, institutional investors increase their shareholdings in the unifying firm. Overall, our results suggest that voting rights are an important determinant of institutional investment decisions.