The document provides background information on B-Corporations and the organizations B-Labs and GIIN. It discusses how B-Labs was founded in 2006 to create a new type of beneficial corporation and provide certification through surveys of organizations. It details how GIIN was later founded to help impact investors find companies pursuing social and environmental goals. GIIN developed standards like IRIS and partnered with B-Labs to create the GIIRS rating system, which would allow consistent evaluation of companies using IRIS metrics. The B-Labs certification survey and emerging GIIRS approach incorporate some aspects of sustainability but have limitations in providing a full assessment of organizational sustainability as defined in the paper.