How to deliver mega-scale investment in climate infrastructure

This paper examines how the world's largest long-term investors, in partnership with government and industry players, can scale up investment in climate infrastructure. Drawing on semi-structured interviews with senior investment professionals from global asset owner institutions representing approximately USD $3.2 trillion in assets under management, this study identifies five criteria for improving collaboration and fostering scalable investment models: governance and control, transparency and reporting, aligned interests, third-party partnerships, and collaborative platforms. These criteria interact in complementary and sometimes competing ways, shaping how collaborative investment models form and scale. The findings offer a structured framework for designing investor-led platforms that enhance coordination, reduce risk, and accelerate capital mobilization for climate infrastructure.