Helion Energy

Helion Energy, Inc.

Fusion Machine Developer

Projects: 5 Funding (Investment): 9 Funding (Nondilutive): 3 Jobs: 105 News: 9

helionenergy.com

Founding Year

2013

Location

United States flag Everett, Washington, United States

Company Founders

John Slough

Chris Pihl

George Votroubek

David Kirtley

Leadership

George Votroubek, Principal Scientist

David Kirtley, CEO

Chris Pihl, CTO

Helion is a fusion machine developer pursuing the field-reversed configuration (FRC) path to fusion energy. Helion has built and operated a number of FRC machines and is currently building Polaris, an FRC with the stated goal of generating electricity from fusion reactions.

News

5/26/26 [ Community ] Design-Specific Licensing: What it takes to deploy fusion at scale

May 26, 2026 Helion Energy

Press release Policy

Rolling metal into magnet strength

Apr 9, 2026 Helion Energy

Press release Research

How we conducted and measured D-T fusion

Feb 13, 2026 Helion Energy

Press release Milestones

Projects

FEP

2018 - Present

IPA

2005 - 2012

Polaris

Description

Polaris is Helion's seventh-generation prototype device. The project has been in development since 2021. The field reversed configuration device is designed to be 19 meters long.

Trenta

Description

Trenta is Helion's sixth-generation prototype device. The field reversed configuration device has a total length of 15 meters.

In 2020, the Trenta device was able to achieve temperatures of 9 keV or 100 million degrees Celsius.

Venti

Funding Received (Investment)

June 4, 2026

roundSeries G

$465,000,000

FundersCapricorn Investment Group Lightspeed

+ 9 More

AnnouncementSeries G: https://www.helionenergy.com/newsroom/helion-raises-465-million-series-g-funding-round-to-meet-surging-global-demand-for-power

January 28, 2025

roundSeries F

$425,000,000

FundersNucor Capricorn Investment Group

+ 3 More

AnnouncementSeries F

September 27, 2023

roundNucor Strategic

$35,000,000

FundersNucor

AnnouncementNucor Strategic

November 5, 2021

roundSeries E

$500,000,000

AnnouncementSeries E

September 3, 2020

roundSeries D

$40,000,000

AnnouncementSeries D

January 1, 2019

roundSeries C

$10,000,000

FundersCapricorn Investment Group

AnnouncementSeries C

July 6, 2015

roundSeries B

$10,614,202

FundersMithril Capital Management Capricorn Investment Group

Announcement

August 12, 2014

roundSeries A

$1,499,986

FundersMithril Capital Management Y Combinator (YC)

AnnouncementSeries A

August 9, 2014

roundSeed

$120,000

FundersY Combinator (YC)

Announcement

Funding Received (Nondilutive)

September 10, 2025

programINFUSE

FundersFusion Energy Sciences (FES)

AnnouncementINFUSE: Study of field reversed configuration stability during super-Alfvénic acceleration and translation via hybrid kinetic simulations

July 25, 2023

programINFUSE

FundersFusion Energy Sciences (FES)

AnnouncementINFUSE: Nonlinear kinetic simulation study of non-equilibrium and merging FRCs

September 30, 2015

programALPHA

$3,971,263

FundersAdvanced Research Projects Agency-Energy (ARPA-E)

AnnouncementALPHA: Compression of FRC Targets for Fusion

Jobs

Senior Mechanical Engineer

Helion Energy

Everett, Washington, United States

Mechanical Engineering

Full-time

On-site

Found 4 months ago

Senior Mechanical Engineer, Plasma Diagnostics

Helion Energy

Everett, Washington, United States

Mechanical EngineeringPhysics

Full-time

On-site

Found 2 months ago

Magnet Analyst

Helion Energy

Everett, Washington, United States

Physics

Full-time

On-site

Found 18 days ago

R&D Hardware Test & Development Manager

Helion Energy

Everett, Washington, United States

Quality & Testing

Full-time

On-site

Found 25 days ago

Technical Program Manager - HERCULES

Helion Energy

Everett, Washington, United States

Project Management

Full-time

On-site

Found 4 months ago

Principal Experimental Scientist - RF

Helion Energy

Everett, Washington, United States

Physics

Full-time

On-site

Found 2 months ago

R&D Engineer - Fusion Generator Operations

Helion Energy

Everett, Washington, United States

Physics

Full-time

On-site

Found 2 months ago

Senior Network Engineer

Helion Energy

Everett, Washington, United States

Software Engineering

Full-time

On-site

Found 4 months ago

Senior Computational Plasma Scientist - MHD

Helion Energy

Everett, Washington, United States

Physics

Full-time

On-site

Found a month ago

Senior Firmware Engineer

Helion Energy

Everett, Washington, United States

Software Engineering

Full-time

On-site

Found 4 months ago

People Operations Coordinator (Contract)

Helion Energy

Everett, Washington, United States

People & HR

Contract

On-site

Found a month ago

Senior Electrical Engineer, Hardware in the Loop

Helion Energy

Everett, Washington, United States

Electrical Engineering

Full-time

On-site

Found 4 months ago

Electrical Systems Engineer

Helion Energy

Everett, Washington, United States

Electrical Engineering

Full-time

On-site

Found 4 months ago

Senior Supplier Development Engineer, Electrical

Helion Energy

Everett, Washington, United States

Electrical EngineeringSupply Chain

Full-time

On-site

Found 4 months ago

Test Automation Engineer, Manufacturing

Helion Energy

Everett, Washington, United States

Quality & TestingManufacturing

Full-time

On-site

Found 12 days ago

Capacitor R&D Supervisor

Helion Energy

Everett, Washington, United States

Electrical Engineering

Full-time

On-site

Found 24 days ago

Integration and Test Engineer

Helion Energy

Everett, Washington, United States

Systems EngineeringQuality & Testing

Full-time

On-site

Found 4 months ago

Senior Electrical Engineer

Helion Energy

Everett, Washington, United States

Electrical Engineering

Full-time

On-site

Found 4 months ago

Experimental Scientist

Helion Energy

Everett, Washington, United States

Physics

Full-time

On-site

Found 11 days ago

Procurement Specialist

Helion Energy

Everett, Washington, United States

Supply Chain

Full-time

On-site

Found a month ago

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