A growing body of research has been investigating the role of management practices and managerial behaviour in conventional private firms and public sector organizations. However, little is known about managers’ behavioural profile in noninvestorowned firms. This paper aims to fill this gap by providing a comprehensive behavioural characterization of managers employed in cooperatives. We gathered incentive-compatible measures of risk preferences, time preferences, reciprocity, altruism, and trust from 196 Uruguayan managers (half of them employed in worker cooperatives) and 92 first-year undergraduate students. To do this, we conducted a high-stakes lab-in-thefield experiment in which participants played a series of online experimental games and made incentivised decisions.