Key Takeaways
- • KKR and HA Sustainable Infrastructure Capital (HASI) each committed an additional $500 million to CarbonCount Holdings 1 (CCH1), their joint sustainable infrastructure co-investment platform, bringing total new capital to $1 billion as of December 16, 2025.
- • The expanded capital commitments, combined with existing leverage targets, are expected to bring CCH1's total investment capacity to nearly $5 billion, significantly scaling the platform's deployment capability across U.S. sustainable infrastructure projects.
- • The co-investment vehicle's investment period has been extended to the earlier of the end of 2027 or when all commitments have been utilized, providing a defined timeline for capital deployment in the clean energy infrastructure sector.
- • Through November 2025 and accounting for reinvestment of returned capital, the HASI-KKR strategic partnership had closed nearly $3 billion in cumulative investments prior to this $1 billion capital commitment expansion.
- • The deal underscores institutional and alternative asset manager confidence in the sustainable infrastructure investment thesis and demonstrates the appetite for long-term, flexible capital solutions targeting high-quality renewable and climate-focused infrastructure assets.
Summary
KKR and HA Sustainable Infrastructure Capital announced on December 16, 2025, a significant $1 billion capital commitment expansion to CarbonCount Holdings 1, their jointly established co-investment platform dedicated to sustainable infrastructure projects across the United States. Each firm committed an additional $500 million to the vehicle, reflecting sustained institutional conviction in the clean energy infrastructure market and the long-term capital deployment strategy.
The expanded capital base positions CCH1 with approximately $5 billion in total investment capacity when combined with existing leverage targets. This scaling represents a material expansion of the platform's ability to finance large-scale sustainable infrastructure projects, including renewable energy assets and climate solutions infrastructure. The vehicle was originally established by HASI and KKR to provide long-term, flexible capital solutions addressing the persistent capital gap in sustainable infrastructure development.
Prior to this commitment, the HASI-KKR partnership had demonstrated significant deployment capability, closing nearly $3 billion in cumulative investments through November 2025 after accounting for reinvestment of returned capital. This track record of capital deployment supports the rationale for expanding committed capital and extending the investment period. The parties have extended CCH1's investment period to the earlier of the end of 2027 or full utilization of committed capital, establishing a defined deployment window for the expanded funding.
The transaction was structured with legal representation from Simpson Thacher & Bartlett advising KKR on the capital commitment agreement, with teams focused on M&A and tax considerations. The expansion reflects broader institutional investor momentum toward sustainable infrastructure assets and demonstrates confidence from both a leading climate-focused investor (HASI) and a major global alternative asset manager (KKR) in the long-term economics and risk-adjusted returns of the sector.
The expanded capital base positions CCH1 with approximately $5 billion in total investment capacity when combined with existing leverage targets. This scaling represents a material expansion of the platform's ability to finance large-scale sustainable infrastructure projects, including renewable energy assets and climate solutions infrastructure. The vehicle was originally established by HASI and KKR to provide long-term, flexible capital solutions addressing the persistent capital gap in sustainable infrastructure development.
Prior to this commitment, the HASI-KKR partnership had demonstrated significant deployment capability, closing nearly $3 billion in cumulative investments through November 2025 after accounting for reinvestment of returned capital. This track record of capital deployment supports the rationale for expanding committed capital and extending the investment period. The parties have extended CCH1's investment period to the earlier of the end of 2027 or full utilization of committed capital, establishing a defined deployment window for the expanded funding.
The transaction was structured with legal representation from Simpson Thacher & Bartlett advising KKR on the capital commitment agreement, with teams focused on M&A and tax considerations. The expansion reflects broader institutional investor momentum toward sustainable infrastructure assets and demonstrates confidence from both a leading climate-focused investor (HASI) and a major global alternative asset manager (KKR) in the long-term economics and risk-adjusted returns of the sector.
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