There is a debate in the literature about the relationship between green innovation, environmental management, environmental performance, and the value of a firm. Herein, the effects of green innovation and environmental management on environmental performance are analysed using a stochastic frontier model for energy-intensive listed companies from 2011 to 2017; the effects thereof on the value of a firm are assessed empirically. The results show that green innovation and environmental management have a positive effect on corporate environmental performance, and green innovation plays a complete mediating role between environmental management and environmental performance. The significant positive effect of green innovation on value of a firm confirms Porter’s hypothesis, but the positive effect of environmental management on value of a firm is not verified. Finally, recommendations that are aimed at improving corporate environmental performance are given.