Blackstone closed its Energy Transition Partners V fund at $8.7 billion, reaching the hard cap and coming in more than 50% larger than the previous fund. The capital is earmarked for large-scale energy businesses across power generation, electricity transmission, and energy efficiency. Since January 2025, the broader BETP strategy has committed over $11 billion in new equity, including power equipment makers and battery storage assets. The fund has already backed three platform companies, Kindle, Fisterra, and Viridon, and completed acquisitions in data center liquid cooling, utility infrastructure services, and energy infrastructure inspection. Blackstone points to a 34% net IRR since 1997, though that track record covers a very long period. The bigger question is how quickly the new fund can move from commitments to operating projects, especially as interconnection queues and supply chains remain tight.
