Startups
Thea Energy (formerly Princeton Stellarators) was founded in 2022 with a focus on leveraging recent breakthroughs in stellarator physics and engineering to create a faster, simpler approach to commercializing fusion energy. Thea Energy is reinventing the stellarator using computer-controlled arrays of planar coils and replacing the intricate, complex modular magnets required in all other proposed stellarator architectures. Stellarators are inherently steady-state, stable magnetic configurations that eliminate potential disruptions, making it an optimal pilot plant architecture. Thea Energy is building off foundational research and technology development that it spun out of Princeton University and Princeton Plasma Physics Laboratory, where the stellarator was first imagined in 1951. Thea Energy's proprietary breakthroughs have now enabled systems to be simpler and more practical than previously possible resulting in a system design that can scale to long-term commercial system operation and maintenance.
Overview
Location
United States
Employees
11-50
Total raised
$120M
Founded date
2022
Investors 1
| Date | Name | Website |
| Sign up to see | Sign up to see | Sign up to see |
Funding Rounds 2
| Date | Series | Amount | Investors |
| Sign up to see | Sign up to see | Sign up to see | Sign up to see |
| Feb 8, 2024 | Series A round | $20M |
Mentions in press and media 19
| Date | Title | Description |
| Sign up to see | Sign up to see | Sign up to see |
| Sep 9, 2026 | Fusionality raises CHF 3 million to take fusion devices next level | Magnetic fusion devices use powerful magnets to confine a super-hot plasma - creating the conditions found in stars, here on earth. More than 30 privately funded companies worldwide are now building fusion devices, alongside publicly funde... |
| Aug 24, 2026 | Thea Energy Closes Series B Extension Funding | Thea Energy, Inc., a Kearny, New Jersey-based provider of planar coil stellarator fusion energy technology, raised an undisclosed amount in Series B extension funding. Backers included Brevan Howard Macro Venture, Aloniq, ALJ Investments, B... |
| Aug 8, 2026 | Stellarator Coil Design Cracked in 40 Minutes: Laptop Beats 8,500 Supercomputer Runs | By Devin Culbertson Published: Aug 08 2026, 8:11 AM EDT Share on Facebook Share on Twitter Share on LinkedIn Share on Reddit Share on Flipboard |
| Jun 6, 2026 | Helion Ignites Fusion Future with $465M Boost, Microsoft Awaits Clean Power | Helion, a leading fusion energy firm, recently secured $465 million in Series G funding. This round, led by Thrive Capital, catapulted its valuation to $15.5 billion. The capital injection accelerates Helion's mission to commercialize fusio... |
| Jun 5, 2026 | «Термоядерный» стартап Сэма Альтмана привлек $465 млн на строительство электростанции для Microsoft | Американский «термоядерный» Helion, среди инвесторов которого есть Сэм Альтман, привлек $465 млн в раунде Series G под руководством Thrive Capital. После сделки оценка компании выросла до $15,5 млрд. Деньги направят на завершение строительс... |
| Jun 1, 2026 | Thea Energy Secures $100M for Commercial Fusion Power | Thea Energy secured $100 million in Series B funding. This investment propels their advanced stellarator fusion technology. The company aims to build scalable, commercial fusion power plants. Funds expand magnet manufacturing and accelerate... |
| May 28, 2026 | Thea Energy: $100 Million Series B Raised To Build Scalable Fusion Power Plants | Thea Energy, a fusion energy company advancing stellarator technology for commercial power generation, announced it has raised $100 million in Series B funding. The oversubscribed round was led by US Innovative Technology Fund (USIT) with p... |
| May 28, 2026 | Thea Energy Raises $100 Million Series B | KEARNY, NJ, Thea Energy, a technology company advancing the commercialization of an abundant source of baseload fusion power, has raised $100 million in Series B funding. >> Click here for more funding data on Thea Energy >> To... |
| May 27, 2026 | Thea Energy Raises $100M to Scale Fusion Plants | Thea Energy Inc., a clean energy technology company specialising in magnetic confinement fusion, has announced the closing of an oversubscribed $100 million Series B raise. The new cash will be a crucial step forward for the Princeton Unive... |
Show more
Reviews 0
FAQ about Thea Energy
When was Thea Energy founded?
Thea Energy was founded in 2022.
How much funding has Thea Energy raised?
Thea Energy has raised $120M in total across 2 funding rounds.
What funding rounds has Thea Energy raised?
Parsers VC lists 2 funding rounds of Thea Energy, among them a Series A round of $20M on Feb 8, 2024.
What has the press written about Thea Energy?
Parsers VC has collected 19 articles mentioning Thea Energy, among them “Fusionality raises CHF 3 million to take fusion devices next level” (Sep 9, 2026) and “Thea Energy Closes Series B Extension Funding” (Aug 24, 2026).
Is Thea Energy still active?
Yes, Thea Energy is active; its latest activity on Parsers VC dates from Sep 9, 2026.