Can investor coalitions drive corporate climate action?

This paper investigates the effectiveness of collective investor engagement in driving corporate climate action. Empirically, I focus on Climate Action 100+ (CA100+), the world’s largest investor coalition on climate change. To address common measurement issues in previous research, I conduct a multidimensional assessment of companies’ climate action. In particular, I collect new primary data on the ambition of carbon emission reduction targets and use the ClimateBERT model to analyse climate-related disclosure. To isolate the causal impact of CA100+, I examine the selection of the coalition’s focus companies and employ a Difference-in-Differences analysis. While the findings suggest that CA100+ has had no effect on companies’ disclosures or reductions in carbon emissions, I observe a significant impact on targets. However, this effect holds only for medium- and long-term targets, not in the short-term, and is exclusively driven by companies potentially selected based on prior investor knowledge. Overall, this study finds limited effectiveness of collective engagement through CA100+. It raises questions about the importance of investor selectivity for engagement success and highlights the risk of companies backloading their decarbonisation efforts.