About Helion
Helion is a company based in Redmond (United States) founded in 2010 by George Votroubek. It operates as a Green Energy-as-a-Service. Helion has raised $1.44 billion across 8 funding rounds from investors including NASA, Lightspeed Venture Partners and DOE. Helion offers products and services including Fusion Power Plant. Helion operates in a competitive market with competitors including TAE Technologies, General Fusion, SHINE Technologies, Phoenix and Zap Energy, among others.
- Total Equity Funding$1.44 B (USD)
in 8 rounds
- Latest Funding Round$465 M (USD), Series G
Jun 2026
- InvestorsNASA
& 19 more
Products & Services of Helion
Helion offers a comprehensive portfolio of products and services, including Fusion Power Plant.
Fusion power plants are developed for clean electricity production.
Apps and channels of Helion
its YouTube channel Helion has 12.6K subscribers and 20 videos.
Videos from Helion
The most watched videos on Helion's YouTube channel, Helion (12.6K subscribers). Click a video to play it here.
More on Helion.
Funding Insights of Helion
Helion has successfully raised a total of $1.44B across 8 strategic funding rounds. The most recent funding activity was a Series G round of $465 million completed in June 2026. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $1.4B
- Total Rounds 8
- Last Round Series G — $465.0M
- First Round $5.0M
(Aug 2011)
- Investors Count 20
All 8 funding rounds of Helion with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Jun 2026 | $465.0M | Series G | – | Thrive Capital | |
| Jan 2025 | $425.0M | Series F | – | – | |
| Nov 2021 | $500.0M | Series E | – | Sam Altman | |
| Sep 2020 | $40.0M | Series D | $1.2B | Dustin Moskovitz | – |
| Jun 2015 | $10.6M | Series B | – | – | – |
| Aug 2014 | $1.5M | Series A | – | Y Combinator , Mithril | – |
| May 2013 | $7.0M | Grant | – | – | |
| Aug 2011 | $5.0M | Grant | – | – |
| Date | Valuation | Stage |
|---|---|---|
| Sep 2020 | $1.2B | •••••••• |
Last known valuation $1.2B (Sep 2020). 20 investors in total: 16 institutional and 4 angel.
Investors in Helion
Helion has secured backing from 20 investors, including venture fund, institutional, and angel investors. Prominent investors backing the company include NASA, Lightspeed Venture Partners and DOE.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Venture capital investing in innovative companies across global sectors is undertaken by Lightspeed Venture Partners. | 1997 | lsvp.com | Menlo Park, United States | |
Venture capital investments in technology and startups. | 2016 | visionfund.com | London, United Kingdom | |
Private equity investments are made in the UK and US. | – | mithril.com | Austin, United States | |
Early-stage startups are accelerated via funding and educational programs. | – | ycombinator.com | Mountain View, United States | |
- | – | thrivecap.com | - | |
- | – | antifund.com | - | |
- | – | boxgroup.com | - | |
- | – | luxcapital.com | - | |
- | – | peakxv.com | - | |
Steel products including bars, sheets, joists, and decks are manufactured. | 1955 | nucor.com | Charleston, United States |
Investor details for Helion
The complete investor list, round-by-round participation and investor portfolios require an active premium plan.
- Complete investor list
- Round participation
- Investor portfolios
- Co-investor network
Verified entity values are shown only after access is granted.
People of Helion
74 people are tracked at Helion (15 in leadership, 1 in board & advisors, 58 in team).
| Name | Role | Group |
|---|---|---|
George Votroubek | Co-Founder | Leadership |
Pragav Jain | Chief Financial Officer | Leadership |
David Kirtley | Founder & CEO | Leadership |
Chris Pihl | Co-Founder & CTO | Leadership |
Megan McCall | Talent Acquisition Partner | Leadership |
David A. Pritchard | Sr. Advisor To The CEO | Leadership |
Jessie Barton | Director Of Communications | Leadership |
Paul Gentsch | Chief Of Staff | Leadership |
Michael Hua | Director Of Nuclear, Chemical, And Materials Engineering | Leadership |
Addy Mendoza | Senior Talent Acquisition Partner | Leadership |
Kevin le | Senior Talent Acquisition Partner | Leadership |
Ali Yousaf | Director Of People Operations & Talent | Leadership |
Nicholas Lima | Vice President Of Engineering | Leadership |
Tanisha McOmber | Senior Talent Acquisition Partner | Leadership |
Savanna Thompson | VP People & Workplace Operations | Leadership |
Dipender Saluja | Board Of Directors | Board & advisors |
Andrew Clark | Senior Manager Of Facilities | Team |
Shahriar Safaee | Mechanical Engineer | Team |
Elliott Fernandez | Information Security Systems Administrator | Team |
Christopher D. | Systems Security Manager | Team |
54 more people are available in the full profile.
Complete people profiles for Helion
Full employee and board profiles, team structure, tenure and professional contact details require an active premium plan.
- Full employee list
- Team structure
- Board tenure
- Professional contacts
Verified entity values are shown only after access is granted.
Timeline of Helion
4 dated milestones of Helion across 16 years, from founding to its latest funding, stage changes and deals.
- Founded Helion is founded.
- Funding First funding round of $5.0M.
- Milestone Reaches Unicorn status.
- Funding Latest funding round, Series G, of $465.0M.
Competitors of Helion
Helion operates in a dynamic and competitive business environment, facing competition from various established players and emerging companies in the market. The competitive landscape includes prominent companies such as TAE Technologies, General Fusion, SHINE Technologies, Phoenix and Zap Energy, among others.
| Company Name | Domain | Founded | HQ Location | Total funding | Employees | Description |
|---|---|---|---|---|---|---|
| tae.com | 1998 | Lake Forest, United States | $1.3B | 224 | FRC nuclear fusion reactors are developed using advanced beam technology. | |
| generalfusion.com | 2002 | Burnaby, Canada | $476.6M | – | Magnetized nuclear fusion reactors are developed for energy production. | |
| shinefusion.com | 2005 | Janesville, United States | $413.6M | 255 | Nuclear isotopes are produced using fusion techniques. | |
| phoenixwi.com | 2005 | Madison, United States | $32.5M | 118 | Hydrogen-based nuclear fusion reactors are developed for power generation. | |
| zapenergy.com | 2017 | Everett, United States | $327.7M | – | Nuclear energy projects are developed in Everett, United States. | |
| firstlightfusion.com | 2011 | Oxford, United Kingdom | $105.4M | 66 | Pulse-powered nuclear fusion processes are developed for energy production. | |
| nt-tao.com | 2016 | Hod Hasharon, Israel | $22.0M | – | Hardware products for plasma heating in nuclear fusion are developed. | |
| kyotofusioneering.com | 2019 | Uji, Japan | $120.0M | – | Provider of nuclear fusion reactor technology based on low-energy nuclear reaction technology |
Detailed competitors of Helion
The full competitor set, operating metrics and side-by-side benchmarks require an active premium plan.
- Full competitor set
- Operating metrics
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- Competitive positioning
Verified entity values are shown only after access is granted.
Web traffic of Helion
The website of Helion (helionenergy.com) receives about 82.5K visits a month.
- Monthly visits82.5K
▲ 3.3% vs previous month
Websites whose visitors overlap most with Helion. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
the-weinberg-foundation.org | the-weinberg-foundation.org | 100% | – | – | – |
energyclassroom.com | energyclassroom.com | 81% | – | – | – |
neimagazine.com | neimagazine.com | 77% | – | #567,503 | – |
| cfs.energy | 52% | 73.3K | #452,191 | View details | |
focusfusion.org | focusfusion.org | 52% | – | – | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
All 11 similar websites and full traffic analytics for Helion
The complete similar-websites list, audience overlap and engagement analytics require an active premium plan.
- 11 similar websites
- Audience overlap
- Engagement analytics
- Traffic by brand
Verified entity values are shown only after access is granted.
Latest news on Helion
Complete news archive for Helion
Full article history, source details, and older brand coverage require an active premium plan.
- Full article archive
- Source and publication date
- Older coverage
- Brand-specific news history
Verified entity values are shown only after access is granted.
Similar companies to Helion
10 companies that operate in the same segment as Helion (Nuclear & Fusion Energy), ranked by their profile score on The Company Check.
| Company | Description | Founded | Location | Total funding | Revenue | Employees |
|---|---|---|---|---|---|---|
Developer of energy solutions | 1925 | Juno Beach, Florida, United States | – | USD 26.53 B | 16,800 | |
Fuel and power producer in the nuclear energy sector | 2001 | United States | USD 307.86 M | – | – | |
Clean energy solutions for generation, retail, and heating are provided. | 1998 | Espoo, Finland | – | USD 5.86 B | 4,470 | |
Advanced nuclear reactors are designed for low-carbon energy solutions. | 2006 | Bellevue, Washington, United States | USD 1.46 B | – | 299 | |
Compact tokamak fusion reactors are developed with superconducting magnets. | 2018 | Cambridge, Massachusetts, United States | USD 3.93 B | – | – | |
Advanced nuclear reactors are designed, built, and operated by Newcleo. | 2021 | London, England, United Kingdom | USD 769.93 M | USD 11.38 M | – | |
Energy corporation | 1903 | Newark, New Jersey, United States | – | USD 12.28 B | 13,050 | |
Energy utilities, natural gas, and communications technology are provided. | 1912 | United States | – | USD 29.55 B | 28,600 | |
FRC nuclear fusion reactors are developed using advanced beam technology. | 1998 | Lake Forest, California, United States | USD 1.32 B | – | – | |
Magnetized nuclear fusion reactors are developed for energy production. | 2002 | Burnaby, British Columbia, Canada | USD 512.93 M | – | – |
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Frequently Asked Questions about Helion
Helion was founded in 2010 and raised its 1st funding round 1 year after it was founded.
Helion is headquartered in Redmond, United States. It is registered at Redmond, Washington, United States.
Helion is a funded company, having raised a total of $1.44B across 8 funding rounds to date. The company's 1st funding round was a Grant of $5M, raised on Aug 2011.
Helion is engaged in the development of the worlds first fusion power plants. The company is dedicated to harnessing fusion technology for electricity production, aiming to provide unlimited clean energy. Solutions are centered on innovative approaches like Trenta and Polaris, addressing global energy challenges within the renewable energy sector.
Helion's top competitors include TAE Technologies, General Fusion and Zap Energy.
Helion offers Fusion Power Plant.
Helion has 20 investors. Key investors include NASA, Lightspeed Venture Partners, DOE, Nucor, and SoftBank Vision Fund.
The valuation of Helion is $1.25B as of Sep 2020.
Helion operates through Helion Energy, Inc..