While public market funds run by institutional investors have been shifting allocations toward cleantech companies, they are often hamstrung by a limited universe of pure-play cleantech equities and index-tracking methodologies that limit their ability to take longer-duration bets. The real action for energy transition investors to date has been in private equity, where funds can take duration risk and have overcome liquidity limitations by successfully raising historically large funds. The pace of private equity dealmaking, which slowed in early 2022, has accelerated sharply again for cleantech since the passage of the Inflation Reduction Act in the United States. How much of the pent-up private equity capital remains to be run through, and how will the even larger universe of public market investors gain access to these growing markets?