Key facts
- Helion’s last known valuation is $15.0B.
- It has raised $1.0B across 2 recorded rounds; the latest was Later Stage VC (Series E) ($500.0M) in Nov 2021.
- Notable investors include Y Combinator, Lightspeed Venture Partners, U.S. Department of Energy, SoftBank Investment Advisers, Sand Hill Angels — 25 tracked in total.
- Status: Privately Held (backing).
- ·Post-money valuations for all 2 rounds
- ·The complete investor list — 25 names
- ·Watchlist + deal alerts for Helion
Funding rounds
2 roundsAbout Helion
Developer of a fusion energy technology designed to generate clean electricity through controlled nuclear fusion. The company's technology offers proprietary fusion reactors, advanced plasma control systems, and integrated power generation technology built specifically for electricity production, enabling utilities, energy partners, and large-scale power users to produce continuous, clean electricity without fuel scarcity or carbon emissions.
- Industry
- Alternative Energy Equipment
- Sector
- Energy
- HQ
- Everett, WA, United States
- Founded
- 2013
- Employees
- 483
- Website
- helionenergy.com/
- Ownership
- Privately Held (backing)
Helion doesn't have a composite mark yet — a PA Mark is published once enough pricing inputs exist (trade prints, fund marks, round prices). The rest of the record below builds toward it.
Recorded secondary trades
No secondary trades in Helion shares have been recorded yet. When a print lands — third-party, direct report, or platform — it appears here with structure, source, and price.
Institutional fund marks
No SEC-registered fund has reported a fair-value mark on Helion in its N-PORT filings yet. We sweep new filings monthly.