Built upon the mixed gamble perspective, we used a recent survey on Chinese family firms (FFs) and found that increased family influence lowers Chinese FF environmental proactiveness, as they show a peculiar tendency to take a financial view rather than a socioemotional wealth view. Moreover, we found that increased resource endowment attenuates this tendency, whereas provincial marketization strengthens it. However, entrepreneur reputation does not have a significant moderating effect. Overall, the study enriches an understanding of environmental proactiveness for FFs, organizational heterogeneity, and institutional differences. It also introduces new elements into the mixed gamble framework.