Helion - About the company
Helion is a series G company based in Everett (United States), founded in 2010 by David Kirtley, George Votroubek and Chris Pihl. It operates as a Provider of deuterium fuel-based magnetic-nuclear fusion reactor. Helion has raised $1.44B in funding from investors like Y Combinator, Thrive Capital and Mithril, with a current valuation of $15.5B. The company has 55 active competitors, including 32 that are funded. Its top competitors include companies like CFS, Proxima Fusion and General Fusion.
Sectors and market segments that Helion operate in
Helion serves in the Energy, Environment market segments.The primary business model of Helion are:Company Details
Provider of deuterium fuel-based magnetic-nuclear fusion reactor. A plasma generated from deuterium & helium is accelerated by pulsed magnetic fields to fuse the nuclei resulting in the release of high temperature. Heat energy is used to generate power.
- Website
- www.helionenergy.com/
- Social
- Email ID
- *****@helionenergy.com
- Registered Address
- Redmond, Washington
Key Metrics
Founded Year
2010
Location
Everett, United States
Stage
Series G
Total Funding
$1.44B in 8 rounds
Latest Funding Round
Post Money Valuation
$15.5B as on Jun 04, 2026
Investors
Ranked
9th among 55 active competitors
Employee Count
561 as on Jun 30, 2026
Similar Companies
Legal entities associated with Helion
Helion is associated with 1 legal entity given below:
Legal Entity Name | Date of Incorporation | Revenue | Latest Employee Count | Documents |
|---|---|---|---|---|
Helion Energy, Inc. CIN: 463247574 , United States, Active | Dec 31, 1999 | - | 310 (As on Dec 31, 2024) | - |
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Helion's funding and investors
Helion has raised a total funding of $1.44B over 8 rounds. Its first funding round was on Aug 16, 2011. Its latest funding round was a Series G round on Jun 04, 2026 for $465M. 11 investors participated in its latest round. Helion has 20 institutional investors and 5 angel investors.
Here is the list of recent funding rounds of Helion:
Filter this list
Filter this listDate of Funding | Funding Amount | Round Name | Post-Money Valuation | Revenue Multiple | Lead Investors | Other Investors |
|---|---|---|---|---|---|---|
Jun 04, 2026 | $465M | Series G | - | - | ||
Jan 28, 2025 | $425M | Series F | $5.42B | - | - | |
Nov 05, 2021 | $500M | Series E | $2.2B | - |
Access funding benchmarks and valuations. Sign up today!View details of Helion's funding rounds and investors
Helion's founders and board of directors
Founder? Claim ProfileThe founders of Helion are David Kirtley, George Votroubek and Chris Pihl. David Kirtley is the CEO of Helion.
Here are the details of Helion's key team members:
- David Kirtley: Co-Founder & CEO of Helion. They serve on the board of 1 company.Contact Info: 1 email address
- George Votroubek: Co-Founder of Helion. Contact Info: 1 email address
- Chris Pihl: Co-Founder & CTO of Helion. Contact Info: 1 email address
Helion's Board of Directors
Helion's board has 4 active members. Ajay Royan, David Kirtley, Christopher Pihl and John Slough are independent board members.Here is the list of Helion's board of directors:
Name | Type | Representing | Status | Duration |
|---|---|---|---|---|
Independent board member | - | Current | 11y 10m | |
Independent board member | - | Current | 11y 10m | |
Independent board member | - | Current | 11y 10m | |
Independent board member | - | Current | 11y 10m |
View details of Helion's Founder profiles and Board Members
Helion's employee count trend
Helion has 561 employees as of Jun 26. Here is Helion's employee count trend over the years:
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Helion's Competitors and alternates
Top competitors of Helion include CFS, Proxima Fusion and General Fusion. Here is the list of Top 10 competitors of Helion, ranked by Tracxn score:
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Rank | Company Details | Short Description | Total Funding | Investors | Tracxn Score |
|---|---|---|---|---|---|
1st | CFS 2018, Cambridge (United States), Series B | Provider of tokamak nuclear fusion reactors | $2.93B | 66/100 | |
2nd |  Proxima Fusion 2023, Munich (Germany), Series A | Developer of fusion power plants | $211M | 66/100 | |
3rd | General Fusion 2002, Burnaby (Canada), Series F | Magnetized nuclear fusion reactor developer | $515M | 66/100 | |
4th | TAE Technologies 1998, Lake Forest (United States), Series G | Developer of FRC nuclear fusion reactors | $1.32B | 65/100 | |
5th | Xcimer 2021, Redwood City (United States), Series A | Developer of laser technology for commercial inertial fusion energy systems | $100M | 64/100 | |
6th |  LIS Technologies 2023, New York City (United States), Series A | Provider of laser isotope separation technologies optimized for uranium (HALEU) power generation | $71.6M | 62/100 | |
7th |  Zap Energy 2017, Everett (United States), Series D | Developer of nuclear energy projects | $330M | 61/100 | |
8th | Company is a developer of a hardware products for plasma heating | $28M | 60/100 | ||
9th | Helion 2010, Everett (United States), Series G | Provider of deuterium fuel-based magnetic-nuclear fusion reactor | $1.44B | 60/100 | |
10th |  SHINE Technologies 2005, Janesville (United States), Series D | Producer of nuclear isotopes using fusion techniques | $654M | 60/100 |
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Helion's Investments and acquisitions
Helion has made no investments or acquisitions yet.
Reports related to Helion
Here is the latest report on Helion's geography:
News related to Helion
Filter this listMedia has covered Helion for a total of 13 events in the last 1 year, 6 of them have been about company updates and 1 about people movement.
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Helion says it is first US fusion energy firm to clear regulatory licensesReuters•Jun 16, 2026•Helion
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Indian restaurant tech firm Petpooja raises $16.5mTech in Asia•Sep 29, 2025•Dharana, Petpooja, Helion Capital, Urban Company and 4 others
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