Fusion & Next-Gen Energy
Companies developing breakthrough energy generation technologies including nuclear fusion and other post-conventional energy sources targeting commercial power production.
CAPITAL FIGURES ARE MEDIA-EXTRACTED ESTIMATES, NOT VERIFIED FILINGS.
EXTRACTED FROM 25+ PODCASTS & VC NEWSLETTERS · MEDIA-REPORTED FIGURES, NOT VERIFIED FILINGS
Institutional and sovereign capital floods fusion at scale
The 28-day window saw multiple $1B+ rounds close across fusion and advanced nuclear, with Commonwealth Fusion attracting sovereign wealth funds and infrastructure giants in a $1B Series D, while CalPERS — a major public pension fund — deployed $1B into pre-revenue fusion. Valar Atomics pulled a $1B Series B from Sequoia, Point72, and Atreides Management at a $6B valuation, with a prior mention noting a 3x step-up within four to five months. This is no longer venture-style moonshot capital: the entry of pension funds and sovereign wealth signals that fusion is being re-underwritten as long-duration infrastructure, not speculative deeptech.
Radiant Nuclear has become the only new-design reactor currently permitted to go to full power, targeting 2026 with a 1MW trailer-mounted micro-reactor — a milestone that reframes SMRs from concept to deployable product. Blue Energy is pursuing prefabricated nuclear plants built with proven reactor technology via shipyard-style manufacturing to compress deployment timelines. Subcritical is advancing an energy amplifier concept operating at 0.97 subcritical with a particle accelerator, adding a novel fission architecture to the mix.
Why it matters · Hardware permitting milestones are the key de-risking event for SMR investors; Radiant's full-power permit in 2026 sets a concrete benchmark that peers must now match to stay fundable.
General Matter, backed by Founders Fund, secured a $900M DOE contract for domestic uranium enrichment (LEU and HALEU) less than a year after emerging from stealth. Standard Nuclear raised a $140M Series A led by Decisive Point to produce TRISO fuel, while Exodys Energy was selected by the Trump administration for access to Cold War-era plutonium for spent fuel recycling. The fuel supply chain is maturing into a standalone, strategically critical venture category distinct from reactor development.
Why it matters · Investors who back fuel infrastructure capture a platform position across every reactor architecture, with DOE contract revenue providing non-dilutive capital that de-risks the equity story.
Quaise Energy raised $134M across two rounds (a $134M Series B from JERA and Idemitsu, and a second $134M Series B from Safar Partners and Prelude Ventures), advancing Project Obsidian using millimeter-wave drilling technology. Fervo Energy is targeting a $6.5B IPO valuation, and industry commentary confirms geothermal is moving from niche to mainstream procurement conversations as utilities seek firm clean power that complements intermittent renewables.
Why it matters · Geothermal's 24/7 dispatchability and growing utility interest make it a capital-efficient hedge for investors overexposed to the longer timelines of fusion and advanced fission.
The AI infrastructure narrative continues to pull capital into non-conventional energy: Valar Atomics and Oklo are explicitly targeting data center power purchase agreements, and Exowatt (A16Z portfolio) is providing solar infrastructure to hyperscalers. Panthalassa is developing ocean thermal energy technology, signaling that even highly novel vectors are attracting attention when framed around always-on compute power demand.
Why it matters · Hyperscaler power purchase commitments are becoming the commercial anchor that lets exotic energy startups raise at infrastructure-like valuations before their plants go live.