Position in SVTR
Snapshot 2026-10-25- Startup SignalsTop 25%–
- Climate & Sustainability#10of 81
- Nuclear#3of 21
About
Helion, founded in 2013 in Everett, Washington, develops fusion energy generators that produce electricity through nuclear fusion.
Full tier & rationale — an SVTR Intelligence benefit
Capital graph
Company· 12
Investor· 10
Founders / team· 4
Funding history
- 2026-06Series D+$465M
Investors · Thrive Capital, Alta Park Capital, Anti Fund, BoxGroup, Lux Capital, Peak XV Partners, Capricorn Technology Impact Funds, Mithril Capital, Good Ventures Foundation, SoftBank Vision Fund 2, LightspeedSource · techcrunch.com ↗
- 2025-02Series D+$425M
Investors · Nucor, SoftBank, Lightspeed, Mithril Capital, Capricorn Investment GroupSource · SVTR Weekly #090
Comparable companies· by market
This company
BusinessLatest roundTotal raisedDate- Helion
Develops fusion power generators that produce electricity through nuclear fusion
Series D+ · $1.5B · 2026-06
$1.5B
United States
BusinessLatest roundTotal raisedDate- TAE Technologies
Company developing fusion energy systems that provide on-demand clean energy
Undisclosed · $1.5B · 2025-06
$1.5B - Commonwealth Fusion Systems
Magnetic confinement fusion company spun out of the MIT Plasma Science and Fusion Center (PSFC), building the net-energy demonstration device SPARC and the first commercial fusion power plant ARC based on a high-temperature superconducting (HTS) magnet approach.
Series D+ · $4.0B · 2026-07
$4.0B - TerraPower
Designs next-generation nuclear reactors for power generation
Undisclosed · $650M · 2025-06
$650M
China
BusinessLatest roundTotal raisedDate- 新奥聚变
R&D of spherical-torus hydrogen-boron fusion technology for clean, safe, low-cost commercial controlled fusion energy
Series A · 2026-07 · Valuation $1.5B
—Valuation $1.5B - NovaFusionX
Development of small modular nuclear fusion devices
Series A · $69M · 2026-08
$69M - XinZhu AI
AI for controlled fusion R&D: full-stack AI solutions for fusion devices, from diagnostics and prediction to control and design
Angel · $15M · 2026-09
$15M
Europe
BusinessLatest roundTotal raisedDate- Proxima Fusion
Develops stellarator fusion power plants
Series B · $637M · 2026-07 · Valuation $2.7B
$637MValuation $2.7B - Tokamak Energy
Develops compact fusion reactors using high-temperature superconducting magnets to control and confine superheated plasma
Undisclosed · $125M · 2024-11
$125M - Novatron Fusion
Fusion reactors with stable plasma confinement
Series A · $11M · 2025-03
$11M
Other / unspecified
BusinessLatest roundTotal raisedDateConfirmed rounds only. Matched on subsector, sector, stage and funding scale — each verifiable on the company profiles.
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