Helion Energy

Active#1 worldwide · Fusion & advanced nuclear

Fusion & advanced nuclear

Energy & climate›Fusion & advanced nuclear

HQUnited States

Last roundSeries G · Jun 2026

Uback rankings

Ranking	Tier	Rank	Edition	Next update
Fusion & advanced nuclear · worldwide	Top 45	#1	Edition 0 (beta) · Oct 2026	2 Mar 2027

Rank historyOct 2026 · #1 Fusion & advanced nuclearFirst edition: no movements yet.

Estimated valuation

AI · Fusion & advanced nuclear ranking (worldwide)

≈ USD 16bnUSD 12–19bn · Decacorn High confidence

Hundreds of k$

Millions $

Tens of M$

Hundreds of M$

Unicorn

Decacorn

Hectocorn

Anchor: Last known equity round: Series G · USD 465M · Jun 2026
Published valuation: USD 15.5bn · Jun 2026

An indicative editorial estimate produced by AI, imperfect by nature: neither a financial valuation nor investment advice. Only the market sets a company’s value. Method

Funding history

Date	Round	Amount	Type	Investors	Source
Jun 2026	Series G	USD 465M	Equity	Thrive Capital, Lux Capital, Alta Park	heatmap.news

Extended to USD 500M in Sep 2026.

Rounds as cited by Uback’s rankings and their sources. Equity, debt and grants are shown separately; only equity rounds count towards the valuation anchor.

Independent analyses

By industry professionals & analysts

Industry professionals and financial analysts can publish their own analysis of Helion Energy as a PDF, on one of three angles only:

ValuationWhat is Helion Energy worth?

Versus competitorsHow does it compare?

Who should acquire itStrategic buyers, and why

Publish an analysisName, role and LinkedIn shown · public sources only

Analyses are the opinion of their authors, not of Uback. They are checked before publication and never change the rank.

Invest

Back Helion Energy whether or not it has agreed: your intention joins the pool on Helion Energy, passed to the local partner once it reaches critical mass. Declaring an intention does not mean this company is raising funds.

Back Helion Energy Or back fusion & advanced nuclear worldwide

Pool on Helion EnergyBelow threshold

BackersBelow threshold

Paid intention · valid for life · movable until a deal process opens. If the company does not follow up, Uback invites its Backers to move their intentions to a competitor or a similar company. Investing in non-listed companies carries a risk of losing all the capital invested.

Do you run Helion Energy?

Claim this profile to correct data, add your logo and description, or tell Uback about an upcoming round. Claiming never changes the rank.

Claim this profile Report an upcoming round → Report an error →

Are you a shareholder?

Considering selling some of your shares? Tell Uback privately. Nothing is published without your consent, and never a price or a volume.

Tell Uback privately

What the AI reads

Press & investor announcements2 sources

Read by the AI at the next edition.

Comparable companies in fusion & advanced nuclear

Full fusion & advanced nuclear ranking →

Commonwealth Fusion Systems#2United StatesDecacorn Valar Atomics#3United StatesUnicorn Pacific Fusion#4United StatesUnicorn TerraPower#5United StatesUnicorn

Investors in Helion Energy: Thrive Capital · Lux Capital · Alta Park

Sources. heatmap.news · geekwire.com

Last updated: Oct 2026Report an error

Uback is a content publisher. It provides no investment advice, receives no mandate and takes part in no transaction. Rankings, ranges and brackets are editorial estimates produced by AI, purely indicative.