We hypothesize that labor participation in governance helps improve risk sharing between employees and employers. It provides an ex-post mechanism to enforce implicit insurance contracts protecting employees against adverse shocks. Results based on German establishment-level data show that skilled employees of firms with 50% labor representation on boards are protected against layoffs during adverse industry shocks. They pay an insurance premium of 3.3% in the form of lower wages. Unskilled blue-collar workers are unprotected against shocks. Our evidence suggests that workers capture all the gains from improved risk sharing, whereas shareholders are no better or worse off than without codetermination.