In this paper, a positive organizational ethics -based framework is informed by the microfinance and socially responsible investing movements to capture the process of sustainable financial innovations. Both of these movements are uniquely characterized by the formation of positive ethical networks to develop sustainability innovations in response to external crises. The crisis–PEN–innovation framework proposed makes four contributions to the POE literature: positions corporate sustainability through a POE lens; formalizes the PEN construction through POE theory; proposes PENs are mobilized to respond (...) to external crises; and demonstrates how PENs facilitate sustainability innovations. The theoretical framework is tested using theory-guided process tracing in the sustainable banking sector to understand how sustainability innovations were realized. The findings are consistent with the crisis–PEN–innovation framework proposed. (shrink)