Helion Energy
PrivateLast Round
Series G
Jun 4, 2026
Est. Valuation
$15.5B
Total Funding Raised
$1.49B
Momentum
Top 25%
of companies Caplight tracks
Company Overview
Helion Energy is a clean energy company that develops patented plasma accelerator technology to produce low-cost, zero-carbon electricity through magneto-inertial fusion generators.
Sector
Energy & Sustainability
Verticals
Renewable Energy, Energy Management
Business Model
B2B
Customer Profile
Services & Consulting
AI Layer
Non-AI
Keywords
Price History
Caplight MarketPrice™ estimate for Helion Energy, published with a 90-day delay.
Caplight MarketPrice™
$66.31
per share, as of May 2026
+152.1%
2-year change
Caplight MarketPrice™ is an estimate of private secondary market pricing, shown here on a delayed basis for illustrative purposes only. It may be incomplete, is subject to change, and may not be relied upon for any purpose or considered investment advice.
Helion Energy Comparables
Compare Helion Energy with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Commonwealth Fusion Systems | 85% | |
| Pacific Fusion | 84% | |
| TAE Technologies | 82% | |
Helion Energy Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series G | Jun 4, 2026 | ||||
| Series F | Jan 28, 2025 | ||||
| Strategic | Sep 27, 2023 | ||||
| Series E | Nov 5, 2021 | ||||
| Series D | Sep 22, 2020 | ||||
Series C | Jan 1, 2019 |
Key People
Founding team and executive leadership
Helion Energy Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| SoftBank Investment Advisers | Series G, Series F |
| Capricorn Investment Group | Series B, Series F, Series D, Series E, Series G, Series C |
| Peak XV Partners | Series G |
| Thrive Capital | Series G |
| SoftBank Group | Series F |
| Lux Capital | Series G |
| Alta Park Capital | Series G |
Market signals
Structured signals derived from secondary market and firmographic data.
- Jan 1, 2028
Aims to deliver fusion energy to the grid by 2028.
- Jun 26, 2026
Grew 16% QoQ, from 484 to 562 employees.
Helion Energy Filings
SEC and related filings with document metadata.
| Typed | Date | Amount Offered | Amount Sold | Filling | Pages | Download |
|---|---|---|---|---|---|---|
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Appears On
Curated lists and screens where this company is featured.
Frequently Asked Questions
Common questions about Helion Energy's valuation, stock price, and market status.