Helion - About the company
Helion is a series F 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 $977M in funding from Y Combinator and Mithril, with a current valuation of $5.42B. The company has 50 active competitors, including 30 that are funded. Its top competitors include companies like CFS, General Fusion and TAE Technologies.
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 F
Total Funding
$977M in 7 rounds
Latest Funding Round
Post Money Valuation
$5.42B as on Jan 28, 2025
Investors
Ranked
6th among 50 active competitors
Employee Count
491 as on Mar 31, 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 $977M over 7 rounds. Its first funding round was on Aug 16, 2011. Its latest funding round was a Series F round on Jan 28, 2025 for $425M. 6 investors participated in its latest round. Helion has 13 institutional investors and 4 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 |
|---|---|---|---|---|---|---|
Jan 28, 2025 | $425M | Series F | $5.42B | - | - | |
Nov 05, 2021 | $500M | Series E | $2.2B | - | ||
Sep 23, 2020 | $40M | Series D | $1.25B | - | - |
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 6m | |
Independent board member | - | Current | 11y 6m | |
Independent board member | - | Current | 11y 6m | |
Independent board member | - | Current | 11y 6m |
View details of Helion's Founder profiles and Board Members
Helion's employee count trend
Helion has 491 employees as of Mar 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, General Fusion and TAE Technologies. 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 | General Fusion 2002, Burnaby (Canada), Series F | Magnetized nuclear fusion reactor developer | $515M | 66/100 | |
3rd | TAE Technologies 1998, Lake Forest (United States), Series G | Developer of FRC nuclear fusion reactors | $1.32B | 65/100 | |
4th |  Proxima Fusion 2023, Munich (Germany), Series A | Developer of fusion power plants | $211M | 60/100 | |
5th |  Zap Energy 2017, Everett (United States), Series D | Developer of nuclear energy projects | $330M | 59/100 | |
6th | Helion 2010, Everett (United States), Series F | Provider of deuterium fuel-based magnetic-nuclear fusion reactor | $977M | 59/100 | |
7th | Company is a developer of a hardware products for plasma heating | $28M | 59/100 | ||
8th |  Kyoto Fusioneering 2019, Uji (Japan), Series C | Provider of nuclear fusion reactor technology based on low-energy nuclear reaction technology | $120M | 59/100 | |
9th |  Marvel Fusion 2019, Munich (Germany), Series B | Provider of quantum enhanced and laser-induced clean fusion energy solutions | $160M | 58/100 | |
10th | First Light Fusion 2011, Oxford (United Kingdom), Series C | Pulse-powered nuclear fusion process developer | $105M | 58/100 |
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Helion's Investments and acquisitions
Helion has made no investments or acquisitions yet.
News related to Helion
Filter this listMedia has covered Helion for a total of 8 events in the last 1 year, 5 of them have been about company updates and 1 about people movement.
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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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Helion Energy starts construction on nuclear fusion plant to power Microsoft data centersThe Star Online•Jul 30, 2025•Helion, Microsoft
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To expand commercialized fusion power, SoftBank supports Helion’s $425 M Series F investmentIncubees•Feb 10, 2025•Helion, SoftBank, Lightspeed Venture Partners, Nucor and 5 others
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Amazon-backed X-energy bags $700M more for itty-bitty nuke reactors that don't exist yetThe Register•Feb 07, 2025•X Energy, Amazon, Jane Street, Ares Management and 8 others
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