Polaris
Fusion prototype designed to demonstrate electricity generation.
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Energy & Climate · Fusion Energy
Helion
Develops pulsed fusion systems designed to produce electricity directly.
- Research status
- Research coverage
- Headquarters
- Everett, WA
- Coverage
- 2 product lines mapped
- Last reviewed
- September 2026
Product map
What the company builds
Products and operating platforms help connect company-level news to the revenue pools, customers, competitors, and supply chains it may affect.
Fusion power system
Pulsed non-ignition fusion approach aimed at commercial power.
01 / THE BUSINESS
How Helion creates value.
Fusion systems aim to deliver commercial electricity. Technical validation, manufacturing repeatability and delivered power economics must be assessed separately from financing announcements.
SectorEnergy
Founder coverage2 profiles
Research checkedSep 18, 2026
02 / PEOPLE BEHIND THE COMPANY
Meet the builders.
Co-founder
David Kirtley
David Kirtley is a co-founder of Helion. The company’s founding and leadership material provides context for its work in fusion energy.
Explore founderCo-founder
Chris Pihl
Chris Pihl is a co-founder of Helion. The company’s founding and leadership material provides context for its work in fusion energy.
Explore founderSelected founders; historical founding roles are distinct from current management positions.
03 / CAPITAL & OWNERSHIP
Follow the financing.
Selected disclosed events, newest first. Announcement values describe that transaction and date; they are not current share prices. Debt, equity and secondary transactions are identified separately.
- Equity
Series G final close update
Disclosed amount$500M totalPost-money basis at initial close$15.5BNamed participants: Thrive Capital · Lux Capital · Lightspeed Venture Partners · Mithril Capital · SoftBank Vision Fund 2 · Capricorn Technology Impact Funds
September update increased the same round from the initial $465M announced June 4. The final-close update does not restate a new valuation; investors shown were named at the initial close.
Read the announcement
Explore the named investors.
Thrive CapitalLux CapitalLightspeed Venture PartnersMithril CapitalSoftBank Vision Fund 2Capricorn Technology Impact Funds
Names refer to the cited transactions. They do not establish current ownership, ownership percentages, or endorsement of this website.
04 / IN THEIR OWN WORDS
Watch. Listen. Form your view.
Helion
Helion — official video channel
Product demonstrations, company presentations and original updates, linked from the company’s own website.
Visit original material ↗Interviews reflect the speaker’s perspective at publication. Company statements are not independent verification.
05 / EDITORIAL ANALYSIS
The opportunity. The open questions.
Our interpretation of the business model and cited sources, not a valuation or a recommendation.
The case to investigate
- A differentiated technical architecture paired with commercial delivery commitments.
- A stronger product position becomes economically meaningful when customers renew, expand and pay enough to cover delivery costs.
Pressure-test the thesis
- Scientific validation.
- Schedule risk.
- Capital intensity.
What to watch next
01
Machine milestones — what changed in the latest original disclosure?
02
Power delivery progress — what changed in the latest original disclosure?
03
Component reliability — what changed in the latest original disclosure?
YOUR RESEARCH WORKSPACE
Keep the questions that matter.
Use this checklist to record what you have investigated. Your notes stay in this browser.
06 / RESEARCH TRAIL
Go straight to the source.
Company FAQ: technology and ownership statushelionenergy.com · May 18, 2026Company background and development historyhelionenergy.comFounding & leadership backgroundhelionenergy.comSeries G final close updatehelionenergy.com · Sep 2026
Research checked Sep 18, 2026. Selected public disclosures, not a complete capitalization table or securities-filing search. Missing information is left unconfirmed. No investment availability or IPO date is implied.
A differentiated technical architecture paired with commercial delivery commitments.
Private-company information is incomplete, episodic, and difficult to verify. Treat every data point as a starting point for diligence—not a substitute for company-approved materials, legal review, or investment analysis.
Add to my private currentSignals to monitor
Machine milestonesPower delivery progressComponent reliabilityRisks to underwrite
Scientific validationSchedule riskCapital intensity Underwriting map
What an investor should actually diligence
Stage-gate technical proof, project economics, manufacturing scale, and capital requirements separately. A signed customer agreement matters only when technical and financing conditions are achievable.
Buyer map
01
Utilities and power buyers
02
Industrial customers
03
Governments and strategic partners
04
Project developers
Economics to request
01
Levelized cost or customer savings
02
Capex through commercial demonstration
03
Yield, uptime, and component life
04
Contract conditions and customer concentration
05
Project finance and dilution requirements
Moat tests
01
Physics and engineering milestones are independently repeatable
02
Supply chain supports commercial scale
03
Economics compete without permanent subsidy
04
IP and know-how survive alternative architectures
Milestone map
01
Technical validation
02
Commercial demonstration
03
Factory or project financing
04
First contracted delivery
Comparable lensesPower equipmentIndependent power producersAdvanced manufacturingFrontier-energy developers
Underwriting framework
How to diligence Helion
A company-specific starting point based on the operating realities of energy & climate. Replace assumptions with verified company materials, customer evidence, legal documents, and expert work.
Levelized cost at commercial scale
Capital cost and financing structure
Contracted offtake and counterparty quality
Construction schedule and contingency
Independent technical validation
Permits and interconnection
Repeatable component performance
Firm customer commitments
Conventional generation
Renewables plus storage
Grid and equipment suppliers
Public project developers
Which milestone is scientific versus commercial?
Who funds the first plant?
What input has the longest lead time?
How does delay affect project returns?
No securities are offered here.
SMYC does not represent that shares are available, transferable, appropriately priced, or suitable for any person. Private securities are illiquid, speculative, subject to transfer restrictions, and may result in total loss.