Research on corporate social responsibility (CSR) has traditionally focused on managerial discretion and stakeholders’ influence. This study extends current research by addressing the effect of family firms and institutional owners on CSR performance, namely, CSR strengths and concerns. Based on stewardship theory and the socioemotional wealth perspective, we propose that family firms are more likely to value CSR performance. Next, drawing from multiple agency theory, we predict that institutional owners, unlike family owners, will influence a firm’s CSR performance differently. We tested our hypotheses using a sample of 153 firms from 1994 to 2006 and found general support for our hypotheses. A higher percentage of family owned equity and the presence of a family CEO are found to increase CSR strengths, whereas transient institutional owners have an opposite effect. The presence of a family CEO and founding family are found to reduce CSR concerns. Contrary to our predictions, dedicated institutional owners are positively associated with CSR concerns.