Firms with well-formulated competitive market strategies could still fail due to their lack of effective nonmarket strategy. Climate change poses significant threats to firms and presents firms’ need to develop nonmarket strategy integrated with market strategy. Relying on the unique dataset of US S&P 500 firms’ responses to climate change, this study seeks to ask why some firms attempt to engage in climate policy making, while others do not do so. The results found that firms with organizational resources and capabilities underlying their carbon market strategy are more likely to support mandatory climate policy. It sheds light on the significance of integrated market and nonmarket strategies, particularly when business opportunities are controlled more by governments than by markets.