A survey was conducted to investigate investment style and drivers of socially responsible investment (SRI) among institutional investors. Respondents were 60 professionals working as SRI or non-SRI investors in 19 different Swedish banks, pension funds, or mutual fund companies. The results showed that non-SRI investors perceived market regulations to be a strong driver of SRI, while SRI investors perceived others’ behavior to be a strong driver. No differences were found between SRI and non-SRI investors with respect to short-term versus long-term or active versus passive investment styles.