About the Nuclear & Fusion Energy Market Map
This market map tracks 108 startups across 8 categories in the Nuclear & Fusion Energy landscape. Complete nuclear and fusion energy market map. Fusion reactors, small modular reactors, nuclear fuel, energy storage, and grid integration companies ushering in the next era of clean energy, with funding data. Curated by Hartmann Capital's venture research team, it provides a comprehensive view of the companies building in this space, from early-stage startups to growth-stage leaders.
Categories & Companies
Fusion Energy Companies(18)
Commonwealth Fusion Systems (Series B, $2000M) · Helion Energy (Series F, $577M) · TAE Technologies (Series G, $1200M) · General Fusion (Series E, $300M) · Pacific Fusion (Series A, $900M) · Inertia Enterprises (Series A, $450M) · Tokamak Energy (Series D, $250M) · Type One Energy (Series B, $170M) · Zap Energy (Series C, $200M) · First Light Fusion (Series C, $107M) · Realta Fusion (Series A, $45M) · Avalanche Energy (Series B, $40M) · Kyoto Fusioneering (Series C, $100M) · Proxima Fusion (Series A, $200M) · Focused Energy (Series A, $80M) · Thea Energy (Series A, $20M) · Marvel Fusion (Series A, $60M) · Xcimer Energy (Series A, $100M)
Small Modular Reactors (SMR)(15)
NuScale Power (Public) · X-energy (Series D, $1500M) · Radiant Nuclear (Series C, $380M) · Last Energy (Series C, $164M) · Holtec International (Private) · GE Vernova Hitachi (Public) · Rolls-Royce SMR (Public) · Aalo Atomics (Series B, $136M) · Blykalla (Series B, $50M) · Antares Nuclear (Series A, $96M) · Deep Fission (Seed, $15M) · Blue Energy (Series A) · Seaborg Technologies (Series A, $40M) · Boston Atomics (Seed) · Samsung Heavy Industries (Public)
Advanced Fission Reactors(16)
TerraPower (Late Stage, $1600M) · Kairos Power (Series C, $600M) · Oklo (Public, $500M) · Terrestrial Energy (Series B, $95M) · Newcleo (Series B, $645M) · Copenhagen Atomics (Series A, $35M) · Moltex Energy (Series A, $70M) · Westinghouse Electric (Private) · General Atomics (Private) · Transmutex (Series A, $25M) · Elysium Industries (Seed, $10M) · Applied Atomics (Seed) · Valar Atomics (Seed, $30M) · The Nuclear Company (Series A, $100M) · Blue Capsule (Seed) · Blossom Energy (Seed)
Nuclear Fuel & Materials(14)
Centrus Energy (Public) · Standard Nuclear (Series A, $140M) · Lightbridge Corporation (Public) · BWXT (Public) · Urenco (Private) · Orano (Private) · Cameco (Public) · Kazatomprom (Public) · Clean Core Thorium Energy (Seed, $15M) · ASP Isotopes (Public) · Curio Solutions (Series A, $18M) · Global Nuclear Fuel (Joint Venture) · Framatome (Private) · Uranium Energy Corp (Public)
Nuclear Services & Engineering(13)
Bechtel (Private) · Amentum (Private) · Fluor Corporation (Public) · Jacobs (Public) · Kinectrics (Private) · Cavendish Nuclear (Private) · Curtiss-Wright (Public) · Doosan Enerbility (Public) · Tractebel (Private) · Nuvia Group (Private) · SNC-Lavalin (AtkinsRealis) (Public) · Wood PLC (Public) · Burns & McDonnell (Private)
Nuclear Waste & Decommissioning(11)
Deep Isolation (Series A, $35M) · EnergySolutions (Private) · Veolia Nuclear Solutions (Public) · APTIM (Private) · Vysus Group (Private) · Studsvik (Public) · Fortum (Nuclear Services) (Public) · Cyclife (EDF) (Private) · US Ecology (Republic Services) (Public) · Perma-Fix Environmental (Public) · Acceleron (Nuclear Recycling) (Seed)
Nuclear-Adjacent Power & Batteries(13)
NANO Nuclear Energy (Public) · Zeno Power (Series B, $50M) · Arkenlight (Pre-Seed) · Betavolt (Seed) · City Labs (Private) · ARC Clean Technology (Series B, $50M) · Ultra Safe Nuclear (Series A, $160M) · Fermi Energia (Seed, $5M) · NDB (Seed, $10M) · Constellation Energy (Public) · Talen Energy (Public) · Vistra Corp (Public) · Energy Harbor (FirstEnergy) (Public)
Nuclear Software & Digital(8)
CAELUS Nuclear (Bootstrapped) · Nuclearis (Seed, $2M) · Ansys (Nuclear) (Public) · Palantir (Nuclear) (Public) · Assystem (Public) · L3Harris (Nuclear) (Public) · Mirion Technologies (Public) · Peak Nano (Seed, $5M)
Frequently Asked Questions
- What is the Nuclear & Fusion Energy market map?
- The Nuclear & Fusion Energy market map is a curated overview of 108 startups across 8 categories : Fusion Energy Companies, Small Modular Reactors (SMR), Advanced Fission Reactors, Nuclear Fuel & Materials, Nuclear Services & Engineering, Nuclear Waste & Decommissioning, Nuclear-Adjacent Power & Batteries, Nuclear Software & Digital. Complete nuclear and fusion energy market map. Fusion reactors, small modular reactors, nuclear fuel, energy storage, and grid integration companies ushering in the next era of clean energy, with funding data. It is maintained by Hartmann Capital's venture research team.
- How many startups are tracked?
- This map currently tracks 108 startups across 8 categories: Fusion Energy Companies (18 companies), Small Modular Reactors (SMR) (15 companies), Advanced Fission Reactors (16 companies), Nuclear Fuel & Materials (14 companies), Nuclear Services & Engineering (13 companies), Nuclear Waste & Decommissioning (11 companies), Nuclear-Adjacent Power & Batteries (13 companies), Nuclear Software & Digital (8 companies).
- How can I submit my startup?
- You can submit your startup for inclusion by visiting the submission page. Submissions are reviewed by Hartmann Capital's research team.
- How often is this map updated?
- The Nuclear & Fusion Energy market map is updated on a rolling basis as new startups emerge, companies raise funding rounds, or the competitive landscape shifts.