Research is scarce on how competitors share knowledge with the intent to create balanced economic, social and environmental value. In this paper we conduct a single, in-depth case study and apply the System Dynamics approach to investigate how knowledge is shared and leveraged, as a system that evolves over time. In the developed model we identify causal loops that reinforce and hinder this system, including efforts both to work out, create and balance economic, social and environmental value. Based on the applied approach we suggest managerial mechanisms that could simultaneously regulate knowledge sharing interactions and balance sustainability demands.