Helion Energy

Helion Energy, Inc.

Fusion Machine Developer

Projects: 5 Funding (Investment): 9 Funding (Nondilutive): 3 Jobs: 106 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

Rolling metal into magnet strength

Apr 9, 2026 • Helion Energy

How we conducted and measured D-T fusion

Feb 13, 2026 • Helion Energy

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

Principal Electrical Engineer

Helion Energy

Everett, Washington, United States

Electrical Engineering

Full-time

On-site

Found 4 months ago

Senior Materials Engineer, Ceramic Fabrication

Helion Energy

Everett, Washington, United States

Materials

Full-time

On-site

Found 3 months ago

Technical Program Manager - HERCULES

Helion Energy

Everett, Washington, United States

Project Management

Full-time

On-site

Found 4 months ago

Senior Computational Plasma Scientist - Kinetic / PIC Modeling

Helion Energy

Everett, Washington, United States

Physics

Full-time

On-site

Found a month ago

Principal Experimental Scientist - RF

Helion Energy

Everett, Washington, United States

Physics

Full-time

On-site

Found 2 months ago

Procurement Specialist

Helion Energy

Everett, Washington, United States

Supply Chain

Full-time

On-site

Found a month ago

Senior Manufacturing Engineer

Helion Energy

Everett, Washington, United States

Manufacturing

Full-time

On-site

Found 4 months ago

Capacitor R&D Supervisor

Helion Energy

Everett, Washington, United States

Electrical Engineering

Full-time

On-site

Found a month ago

Manager, Electrical Engineering

Helion Energy

Everett, Washington, United States

Electrical Engineering

Full-time

On-site

Found 4 months ago

Fuel Cycle Operations Engineer

Helion Energy

Everett, Washington, United States

Nuclear Engineering

Full-time

On-site

Found a month ago

Software Engineer, Plant Control

Helion Energy

Everett, Washington, United States

Software Engineering

Full-time

On-site

Found a month ago

Electrical Engineer

Helion Energy

Everett, Washington, United States

Electrical Engineering

Full-time

On-site

Found 4 months ago

PR Lead

Helion Energy

Everett, Washington, United States

Communications

Full-time

On-site

Found 2 months ago

Senior Test Engineer

Helion Energy

Everett, Washington, United States

Quality & Testing

Full-time

On-site

Found 4 months ago

Senior Electrical Systems Engineer

Helion Energy

Everett, Washington, United States

Electrical EngineeringSystems Engineering

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

Principal Electrical Engineer - RF

Helion Energy

Everett, Washington, United States

Electrical Engineering

Full-time

On-site

Found a month ago

Process Engineer, Fuel Cycle

Helion Energy

Everett, Washington, United States

Nuclear Engineering

Full-time

On-site

Found 3 months ago

Senior Materials Engineer, Dielectrics

Helion Energy

Everett, Washington, United States

Materials

Full-time

On-site

Found 15 days ago

Senior Computational Plasma Scientist - MHD

Helion Energy

Everett, Washington, United States

Physics

Full-time

On-site

Found a month ago

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