We examine the relation between team turnover and firm performance studying the private equity industry. Using a unique data set that tracks over time teams in 138 PE managers and their performance, we uncover a positive relation between turnover and fund performance. We propose and confirm in the data two channels that explain our findings: i) in the short-run, perfor- mance improves when bad performers are fired, ii) in the long-run, turnover helps teams to adapt and replenish their skills in response to shifting exter- nal demand. Our findings suggest that frictions coming from informational asymmetries may deter optimal turnover. These findings are surprising given the common belief among PE investors that team stability is key to long-term success.