By examining a sample of non-listed Chinese firms, we provide the first evidence from China for the effect of managerial ownership on firm performance. In matching-sample comparisons, we find that firms of significant managerial ownership outperform firms whose managers do not own equity shares. Our further results indicate the relation between firm performance and managerial ownership is nonlinear, and the inflection point at which the relation turns negative occurs at ownership above 50%. Compared with previous studies, our results are less likely to suffer from an endogeneity problem due to the non-list nature of our sample and the unique institutional environment in China.