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- Thea Energy
Thea Energy Funding, Investors & Competitors
Thea Energy has raised $120M across 4 funding rounds, most recently a Series B in August 2026.
Last Thea Energy funding round
Series B
Amount undisclosed · Aug 2026
Cumulative funding Thea Energy raised
$120M
across 4 funding rounds
Key investors in Thea Energy
Alumni Ventures
Lowercarbon Capital
Prelude Ventures
Hitachi Ventures
Starlight Ventures
Divergent Capital
Green D Ventures
Climate Capital
About Thea Energy
Thea Energy is a Princeton, New Jersey-headquartered fusion energy startup spun out from Princeton Plasma Physics Laboratory in 2022. It develops modular stellarator reactors using mass-producible planar magnets and AI-driven controls for steady-state plasma confinement. The first prototype, Eos, targets 100 megawatts of fusion power output. Thea Energy raised $20 million in seed funding from investors including Lowercarbon Capital to scale prototypes by 2026.
Founded
2022
HQ
Website
Status
Privately held
Customer focus
B2B
Revenue model
Product sales
Sectors
Thea Energy Funding History
Thea Energy has raised a total of $120M across 4 funding rounds.
Thea Energy's first fundraising round was a $20M Series A in February 2024. The most recent completed round was a Series B in August 2026.
Thea Energy funding rounds
| Date | Stage | Investors | Raised | Deal Summary |
|---|---|---|---|---|
| Aug 2026 | Series B | Brevan Howard Macro Venture; ALJ Investments; Beyond Earth Ventures; Aloniq | - | Thea Energy closed an extension of its Series B funding on August 18, 2026, with new support from Brevan Howard Macro Venture, Aloniq, ALJ Investments, Beyond Earth Ventures, and additional global strategic investors. The extension follows Thea Energy’s previously announced $100 million Series B and was used to scale magnet manufacturing capacity, build a second facility in Northern New Jersey, accelerate construction of its integrated fusion system Eos, and advance commercial deployment of its first Helios power plants. The financing is positioned to support Thea Energy’s commercialization strategy for stellarator-based fusion power, with the company targeting efficient, economical baseload energy production. The business is expanding manufacturing and infrastructure to move from development toward power-plant deployment, building on the momentum of its earlier Series B led by US Innovative Technology Fund. Thea Energy is a fusion power company based in Kearny, New Jersey, focused on the commercialization of stellarator technology. Its work centers on proprietary magnet systems, an integrated fusion demonstration device called Eos, and planned Helios power plants for commercial deployment. |
| May 2026 | Series B | US Innovative Technology Fund (lead); Climate Capital; Calm Ventures; Divergent Capital; Starlight Ventures; Overlay Capital; Prelude Ventures; Alumni Ventures; Hitachi Ventures; Lowercarbon Capital; What If Ventures; Orion Industrial Ventures; Idemitsu Kosan | $100M | Thea Energy raised **USD 100 million** in a **Series B** round announced on May 27, 2026, led by Thomas Tull’s US Innovative Technology Fund, with participation from General Innovation Capital Partners, Linse Capital, and existing investors including Lowercarbon Capital. The round was described as oversubscribed and is aimed at expanding magnet manufacturing capacity, accelerating construction of the company’s integrated fusion system, and advancing toward commercial deployment. The financing supports Thea Energy’s strategy to scale its stellarator-based fusion technology for baseload power generation. The company framed the raise as a milestone in building out a lower-risk, cost-competitive path to commercial fusion power plants, with the new capital directed toward manufacturing and system integration rather than near-term revenue expansion. Thea Energy is a technology company developing stellarator fusion systems for commercial power generation and is based in Kearny, New Jersey. Its prior financing included a **USD 20 million** Series A round in February 2024, and Lowercarbon Capital was also among the earlier participating investors. The latest round adds a broader mix of strategic and financial backers across fusion, industrial, and climate-focused capital. |
| Feb 2026 | Series B | Divergent Capital; Sahin Boydas | - | - |
| Feb 2024 | Series A | Alumni Ventures (lead); Prelude Ventures (lead); Starlight Ventures; Green D Ventures; Mercator Partners; Hitachi Ventures; Lowercarbon Capital; 11.2 Capital; Anglo American; Orion Resource Partners | $20M | Thea Energy Inc., founded in 2022 and based in Princeton, N.J., develops fusion energy technology using stellarator designs with computer-controlled arrays of planar superconducting coils. This approach, originating from research at the Princeton Plasma Physics Laboratory, replaces intricate modular magnets with software-controlled planar coils to simplify manufacturing, improve plasma confinement, and accelerate commercialization of fusion power plants. The company's first-generation system, Eos, aims to demonstrate a path to grid-connected fusion without requiring further scientific breakthroughs. On February 8, 2024, Thea Energy closed a $20 million Series A funding round led by Prelude Ventures, with participation from 11.2 Capital, Alumni Ventures, Anglo American, Green D Ventures, Hitachi Ventures, Lowercarbon Capital, Mercator Partners, Orion Resource Partners (also referred to as Orion Industrial Ventures), and Starlight Ventures. Prelude Ventures managing director Mark Cupta joined the board concurrent with the financing. The funds will support construction of planar coil magnet systems at scale, integrated stellarator system modeling, and team expansion to advance core intellectual property, magnet systems, and the Eos stellarator. Thea Energy plans a pilot-scale reactor later in the decade, followed by a 350-megawatt demonstration plant in the 2030s, targeting power costs of $50 per megawatt-hour to compete with solar-plus-battery, gas, and coal generation. Investors highlighted the team's expertise in plasma physics and fusion engineering, as well as the practical design's potential for zero-emission energy. |
Who has invested in Thea Energy?
23 investors have backed Thea Energy across its funding rounds, including Alumni Ventures, Lowercarbon Capital, Prelude Ventures, Hitachi Ventures, Starlight Ventures and Divergent Capital.
Lead investors include US Innovative Technology Fund, Alumni Ventures and Prelude Ventures.
Thea Energy Investors
| Investor | HQ | Rounds | Role | First check |
|---|---|---|---|---|
| 2 | Participant | Feb 2026 | ||
| 2 | Participant | Feb 2024 | ||
| 2 | Lead | Feb 2024 | ||
| 2 | Lead | Feb 2024 | ||
| 2 | Participant | Feb 2024 | ||
| 2 | Participant | Feb 2024 | ||
| 1 | Participant | May 2026 | ||
| 1 | Participant | May 2026 | ||
| 1 | Participant | Aug 2026 | ||
| 1 | Participant | Feb 2024 | ||
| 1 | Participant | May 2026 | ||
| 1 | Lead | May 2026 | ||
| 1 | Participant | Feb 2024 | ||
This data is available for Pro users. Sign up to see all 23 Thea Energy investors. Start Free Trial | ||||
Benchmark 350K+ Funding Rounds and Disclosed VC Valuation Multiples
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Start Free TrialThea Energy Competitors
Thea Energy competitors include listed companies like Vistra, Cameco, CEZ Group and Uniper, and private ones like Valar Atomics and Commonwealth Fusion Systems.
| Company | HQ | Status | Revenue | EBITDA | Valuation | Revenue Multiple |
|---|---|---|---|---|---|---|
| Publicly listed | $18B | $5B | $48B | 3.3x | ||
| Publicly listed | $2.5B | $825M | $41B | 16.1x | ||
| Publicly listed | $16B | $6.7B | $35B | 2.9x | ||
| Publicly listed | $70B | $2B | $24B | 0.4x | ||
| Private | - | - | $6B | - | ||
| Private | - | - | $3.4B | - |
Thea Energy Public Comps
Thea Energy is still privately-owned, but its public comps include Aramco, ExxonMobil, Chevron, PetroChina, Shell, GE Vernova, TotalEnergies, NextEra Energy, ConocoPhillips and Iberdrola.
| Last FY | EV/Revenue | EV/EBITDA | ||||||
|---|---|---|---|---|---|---|---|---|
| Revenue | EBITDA | Last FY | LTM | 2027E | Last FY | LTM | 2027E | |
| $446B | $213B | 3.9x | 3.7x | 8.2x | 7.1x | |||
| $324B | $68B | 2.2x | 1.8x | 10.5x | 8.0x | |||
| $184B | $41B | 2.4x | 2.0x | 10.8x | 7.2x | |||
| $427B | $70B | 0.8x | 0.7x | 4.7x | 4.4x | |||
| $267B | $55B | 1.2x | 1.0x | 5.8x | 4.5x | |||
| $38B | $3.2B | 6.2x | 5.4x | 73.5x | 43.5x | |||
| $182B | $38B | 1.3x | 1.2x | 6.3x | 5.0x | |||
| $27B | $16B | 10.5x | 9.6x | 17.9x | 16.2x | |||
This data is available for Pro users. Sign up to see all Thea Energy competitors and their valuation data. Start Free Trial | ||||||||
Common questions about Thea Energy
| When was Thea Energy founded? | Thea Energy was founded in 2022. |
| Where is Thea Energy headquartered? | Thea Energy is headquartered in Kearny, NJ, United States. |
| Is Thea Energy publicly listed? | No, Thea Energy is a private, VC-backed company. |
| How much funding has Thea Energy raised? | Thea Energy has raised $120M across 4 funding rounds. |
| What was Thea Energy's last funding round? | Thea Energy's last funding round was a Series B in August 2026. |
| Who are Thea Energy's investors? | Thea Energy's investors include Divergent Capital, Starlight Ventures, Prelude Ventures, Alumni Ventures, Hitachi Ventures, Lowercarbon Capital, Climate Capital, Calm Ventures, Brevan Howard Macro Venture, Green D Ventures and 13 others. |
| Which companies are comparable to Thea Energy? | Companies comparable to Thea Energy include Vistra, Cameco, CEZ Group, Uniper, Valar Atomics and Commonwealth Fusion Systems. |
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