13504 indexable Energy companies headquartered in United States, ranked by total equity funding and recent funding momentum. Combined disclosed equity funding of $217.7B across 1869 funded companies, including 9 unicorns.
| # | Company | Funding | Valuation | Stage | Latest round | Employees | Founded | Momentum |
|---|---|---|---|---|---|---|---|---|
| 1 |
Silicon Ranch
developer of solar power projects |
$1.9B | — | Series G | Series G May 2026 | 115 | 2010 | ↑ Active |
| 2 |
Battalion Oil
Oil and gas exploration and production company |
$2B | — | Acquired | Post IPO Mar 2026 | 63 | 2004 | ↑ Active |
| 3 |
SolarLandscape
Provider of solar integration & project financing services |
$600M | — | Funding Raised | Conventional Debt May 2026 | 91 | 1985 | ↑ Active |
| 4 |
Valar Atomics
Manufacturer of nuclear fission reactors |
$599M | — | Series B | Series B Apr 2026 | — | 2023 | ↑ Active |
| 5 |
GMT Exploration Company
Operator of oil and gas properties, pursuing joint ventures and acquisitions |
$274.5M | — | Series F | Series F Apr 2026 | 15 | 1991 | ↑ Active |
| 6 |
SHINE Technologies
Producer of nuclear isotopes using fusion techniques |
$413.6M | — | Series D | Series D Feb 2026 | 165 | 2005 | ↑ Active |
| 7 |
ProPetro Holding
Provider of oil & natural gas exploration & production services |
$172.8M | — | Public | Post IPO May 2026 | 1,062 | 2005 | ↑ Active |
| 8 |
CFS
Provider of tokamak nuclear fusion reactors |
$2.1B | — | Series B | Series B Aug 2025 | 151 | 2018 | ↑ Active |
| 9 |
Enfinity
Developer of solar energy projects |
$388.4M | — | Series D | Conventional Debt Feb 2026 | 265 | 2005 | ↑ Active |
| 10 |
Dominion Energy
Producer and transporter of energy |
$4B | — | Acquired | Grant (prize money) May 2025 | 17,700 | 1983 | ↑ Active |
| 11 |
Inertia
Developer of technology pursuing commercialization of fusion energy production |
$450M | — | Series A | Series A Feb 2026 | — | 2024 | ↑ Active |
| 12 |
X Energy
Developer of small modular & high temperature gas cooled nuclear reactor |
$605M | — | Public | Series D Nov 2025 | 246 | 2010 | ↑ Active |
| 13 |
Jupiter Power
Developer of energy storage projects |
$500M | — | Acquired | Conventional Debt Jan 2026 | 85 | 2019 | ↑ Active |
| 14 |
ArtIn Energy
Help sustain a carbon-free world by producing hydrogen using solar energy and water for clean, efficient electricity and heat generation |
$255M | — | Series A | Series A Mar 2026 | — | 2012 | ↑ Active |
| 15 |
Summit Midstream
Provides natural gas gathering & midstream services |
$122M | — | Acquired | Post IPO May 2026 | 278 | 2009 | ↑ Active |
| 16 |
Infinity Natural Resources
Appalachian oil and gas exploration and production with environmental responsibility |
$350M | — | Public | Post IPO Feb 2026 | 34 | 2017 | ↑ Active |
| 17 |
Conduit Power
Provider of renewable power generation services |
$200M | — | Seed | Conventional Debt Apr 2026 | 14 | 2022 | ↑ Active |
| 18 |
Ascent Solar
Manufacturer of flexible thin-film solar panels for varied applications |
$265.2M | — | Public | Post IPO Jan 2026 | 16 | 2005 | ↑ Active |
| 19 |
Northern Oil and Gas
Oil and gas production company |
$2B | — | Public | Post IPO Jun 2025 | 38 | 2006 | ↑ Active |
| 20 |
CrossBoundary Energy
Provider of fully financed renewable energy solutions for commercial and industrial clients |
$83M | — | Series B | PE Apr 2026 | 21 | 2014 | ↑ Active |
| 21 |
Torus
Manufacturer of power generators and energy management app |
$67M | — | Series D | Conventional Debt May 2026 | 1 | 2021 | ↑ Active |
| 22 |
Terrestrial Energy
Developer of small modular reactor |
$76.2M | — | Series D | Series D Mar 2026 | 78 | 2013 | ↑ Active |
| 23 |
Heron Power
Provider of electricity generation and consumption services |
$183.2M | — | Series B | Series B Feb 2026 | — | 2024 | ↑ Active |
| 24 |
DSD
Provider of solar panel installation and operation & maintenance services |
$605M | — | Acquired | Conventional Debt Aug 2025 | 192 | 2012 | ↑ Active |
| 25 |
TAE Technologies
Unicorn Developer of FRC nuclear fusion reactors |
$1.2B | $2.6B as of 2019 |
Series G | Series G Jun 2025 | 224 | 1998 | ↑ Active |
| 26 |
Madison Energy Investments
Provider of platform for investors |
$800M | — | Acquired | Conventional Debt Sep 2025 | 32 | 2019 | ↑ Active |
| 27 |
Peregrine Energy Solutions
Developer of utility-scale energy storage and renewable generation solutions |
$382.3M | — | Late Stage | PE Oct 2025 | 31 | 2022 | ↑ Active |
| 28 |
Terra Energy
Provider of solar energy solutions for residential properties, offering a subscription model with no upfront costs and no long-term contracts |
$140.2M | — | Series D | Series D Jan 2026 | — | 2016 | ↑ Active |
| 29 |
nine.energy
Developer of community-scale battery energy storage systems for electric grid |
$325M | — | Late Stage | Conventional Debt Oct 2025 | 35 | 2020 | ↑ Active |
| 30 |
Crux
Provider of clean energy training and consulting services |
$27.1M | — | Series B | Conventional Debt May 2026 | 14 | 2023 | ↑ Active |
| 31 |
TerraPower
Designer of nuclear reactors |
$810M | — | Series D | Series D Jun 2025 | 299 | 2006 | ↑ Active |
| 32 |
Aspen Power
Provider of renewable energy asset development, construction, and operation services |
$120M | — | Acquired | Conventional Debt Jan 2026 | 66 | 2020 | ↑ Active |
| 33 |
Cummins
Manufacturer of gas-powered construction equipment, fuel systems, turbochargers, and braking systems |
$284.5M | — | Public | Grant (prize money) Sep 2025 | 73,600 | 1919 | ↑ Active |
| 34 |
NextEra Energy
Developer of energy solutions |
$2.8B | — | Acquired | Post IPO Feb 2025 | 9,500 | 1925 | ↑ Active |
| 35 |
Array Technologies
Manufacturer of solar trackers |
$845.9M | — | Public | Post IPO Jun 2025 | 14 | 1992 | ↑ Active |
| 36 |
Nautilus Solar
Community solar provider offering savings and supporting clean energy initiatives |
$339M | — | Acquired | Conventional Debt Sep 2025 | 57 | 2006 | ↑ Active |
| 37 |
NEXT Renewable Fuels
Provider of biofuel production services |
$78.2M | — | Series A | Series A Dec 2025 | 10 | 2018 | ↑ Active |
| 38 |
LongPath Technologies
Provider of oil and gas monitoring services |
$39.8M | — | Series A | Conventional Debt Feb 2026 | 31 | 2017 | ↑ Active |
| 39 |
Type One Energy Group
Provider of fuel fusion energy services for healthcare, education, water, food, and transportation |
$82.5M | — | Series A | Series A Jan 2026 | 38 | 2019 | ↑ Active |
| 40 |
Thea Energy
Fusion energy company reinventing the stellarator to create a limitless source of zero emission energy for a sustainable future |
$20M | — | Series B | Series B May 2026 | 38 | 2022 | ↑ Active |
| 41 |
Soltage
Clean energy solutions provider: development, finance, and operation of renewable projects |
$82.1M | — | Acquired | Conventional Debt Dec 2025 | 23 | 2005 | ↑ Active |
| 42 |
Recurrent Energy
Developer of utility-scale solar projects |
$585M | — | Acquired | Conventional Debt Apr 2025 | 110 | 2006 | ↑ Active |
| 43 |
Six One Commodities
Provider of oil & gas downstream services |
$1.8B | — | Funding Raised | Conventional Debt Nov 2024 | 50 | 2018 | ↑ Active |
| 44 |
Panthalassa
Company generating energy from the open ocean |
$18.1M | — | Series B | Series B May 2026 | — | 2016 | ↑ Active |
| 45 |
Radiant Nuclear
Unicorn Developer of portable nuclear microreactors designed to replace diesel generators |
$55M | — | Series D | Series D Dec 2025 | 34 | 2019 | ↑ Active |
| 46 |
Gulf Offshore Research Institute
Supplier of offshore oil and gas |
$20M | — | Seed | Grant (prize money) Apr 2026 | — | 2018 | ↑ Active |
| 47 |
Last Energy
Developer of small modular reactor |
$64M | — | Series C | Series C Dec 2025 | 45 | 2019 | ↑ Active |
| 48 |
Treaty Oak Clean Energy
Developer of utility scale solar projects |
$300M | — | Acquired | Conventional Debt Aug 2025 | 20 | 2021 | ↑ Active |
| 49 |
Avalanche
Developer of energy-dense fusion microreactors for clean power generation |
$45M | — | Series A | Series A Dec 2025 | — | 2018 | ↑ Active |
| 50 |
LIS Technologies
Provider of laser isotope separation technologies optimized for uranium (HALEU) power generation |
$13.5M | — | Series A | Series A Mar 2026 | — | 2023 | ↑ Active |
developer of solar power projects
Oil and gas exploration and production company
Provider of solar integration & project financing services
Manufacturer of nuclear fission reactors
Operator of oil and gas properties, pursuing joint ventures and acquisitions. This company engages in the generation, operation, and development of oil and natural gas properties. Its business strategy includes leveraging technical expertise, generating projects through an experienced team, and pursuing growth through exploration and development drilling. The company maintains financial flexibility through cash flow
Producer of nuclear isotopes using fusion techniques
Provider of oil & natural gas exploration & production services
Provider of tokamak nuclear fusion reactors. It uses rare-earth barium copper oxide in high-field superconducting magnets for the working of compact fusion reactors.
Developer of solar energy projects
In 2022, the company recorded annual revenues of $17.17B and a net profit of $0.99B.
Developer of technology pursuing commercialization of fusion energy production. The company focuses on a direct path to commercial energy using a diode-pumped, solid state laser driving an indirect drive target with Deuterium-Tritium fuel. It aims to retire risk areas in laser design, target fabrication, and power plant design. The company plans to construct a demonstrator fusion power plant.
Developer of small modular & high temperature gas cooled nuclear reactor. It operates through tri-structural isotropic particle fuel. And also offers pebble bed nuclear reactor, zero emission energy, neutronics, and nuclear engineering services.
Rankings are computed by Radar (Fliar BI) from the Radar company master and are updated periodically. Funding and momentum scores use disclosed equity-funding data only. Figures may lag private rounds. Last updated 2026-06-16.
