Using the Natural Resource Based View (NRBV) as our theoretical lens, green IS or sustainable IS is conceptualized as comprising the different dimensions of sustainability practices that can create competitive advantage for the organization. This study examines (i) the impact of adoption of sustainable IS on organizational performance; and (ii) the impact of the extent of adoption of sustainable IS on organizational performance. Analyzing secondary data on sustainable IS and performance measures of 115 global organizations, we find that the adoption of sustainable IS is positively associated with market valuation and innovativeness but not with profitability. However, sustainable IS organizations that have greater extent of adoption realize better profitability, market valuation and innovativeness. Implications of results for research and practice are discussed.