Climate Change and the Value of Institutional Shareholders: Evidence From the Paris Agreement

Pattarake Sarajoti, Pattanaporn Chatjuthamard, Pornsit Jiraporn and Sang Mook Lee

Business Strategy and the Environment, 2026, vol. 35, issue 1, 1473-1494

Abstract: We investigate the impact of institutional ownership on shareholder value around the adoption of the Paris Agreement, a historic global accord endorsed by nearly all nations and one of the most crucial climate change initiatives in history. Using event study methodology, we find that firms with higher institutional ownership experienced significantly more favorable stock market reactions, suggesting that institutional shareholders play a crucial role in promoting corporate sustainability. In particular, a rise in institutional ownership by one standard deviation improves the stock market reactions by 10.6%. Additionally, using innovative text‐based metrics derived from machine learning algorithms, we analyze the effects of firm‐specific climate change exposure, finding that whereas physical risks considerably moderate the positive impact of institutional shareholders, regulatory risks and new business opportunities do not. Our results highlight the critical importance of institutional investors in enhancing shareholder value and driving corporate climate responses, providing key insights for policymakers and business leaders.

Date: 2026
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