Helion
Helion is a fusion energy company developing a power plant. Its prototypes, like Polaris, reach 100 million degrees Celsius and enable direct electricity extraction.
Secondary Market Price
Secondary Market Price
How Helion Measures Up
To help you manage your Helion equity, Prospect has run the company through our machine learning model.
Prospect Rating
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This rating reflects our belief in this company's potential to grow to that many times its current value in 4 years. For an employee with stock, this rating suggests a potential return on equity, but it also comes with some risk.
Exit Risk
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Our rating is a reflection of the likelihood of this company achieving a liquidity event for its employees based on the quality of investors, funding stage, founders, and more.
Funding Stage
Series F
A company’s funding stage reflects how established it is, how quickly it is scaling, and the average impact an employee may have when joining.
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Prospect Projected Future Helion Prices
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Company Description
Helion is a fusion power company based in Everett, Washington, that is working to build the world's first commercial fusion power plant. The company is currently operating its seventh-generation prototype, Polaris, which achieves thermonuclear fusion daily. Alongside operating Polaris, Helion is constructing the power plant itself and expanding its manufacturing facilities. Founded in 2013, the company has raised over $1 billion and has developed multiple prototypes. Its previous machine, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius.
Recent company developments include the transition of the Polaris prototype into full-time operations in 2025 and the commencement of construction on its first power plant. To accelerate development, Helion has also launched 'Tiny Merge,' a smaller testbed for rapid design iteration. In addition, the company supports external research in materials science and other related fields through its HERCULES program, which funds university and enterprise projects to help scale fusion power.
- Sam Altman
- Mithril Capital
- Capricorn Investment Group
- Dustin Moskovitz
- Lightspeed Venture Partners
- SoftBank Vision Fund 2
- Nucor Corporation
- Y Combinator
- Co-Founder, David Kirtley
- Co-Founder, Chris Pihl
- Co-Founder, George Votroubek
- Co-Founder, John Slough
Peer Group Comparison
Vs Peer Group of >$4B Startups
Frequently Asked Questions
Joining Anduril as an employee is another way to acquire equity, typically through stock options included in compensation packages.
Is Helion worth joining?
Deciding whether to join a private company like Helion involves assessing the total compensation, especially the potential value of your equity. Platforms like Prospect can help you forecast your equity's future worth to better understand the financial opportunity.
What should I do with my Helion stock?
Managing private stock involves making strategic decisions about when to exercise options, how to plan for taxes, and when to sell. A platform like Prospect can provide a personalized strategy to help you navigate these choices and optimize your financial outcome.
Can you sell Helion stock?
Selling stock in a private company like Helion is typically possible through secondary markets or company-approved tender offers. Tools like Prospect's tender offer platform can help you decide how much to sell and which shares are most tax-efficient.
How can I find the value of my Helion stock?
Since private company stock isn't traded publicly, its value must be estimated using financial models and company performance data. Prospect's predictive models use proprietary data to help you project the future value of your Helion shares.
What is Helion's equity worth?
The exact value of private equity like Helion's is not public information and depends on factors like the company's latest valuation and growth trajectory. You can use financial modeling tools from a service like Prospect to create data-driven projections of your equity's potential worth.
What is Helion's stock ticker symbol?
As a private company, Helion is not listed on a public stock exchange and therefore does not have a stock ticker symbol. Ticker symbols are only assigned to companies once they become publicly traded through an Initial Public Offering (IPO).
Can I buy or sell Helion stock?
Selling private stock is often possible for employees through tender offers or secondary markets, but buying is generally restricted to accredited investors and institutions. Platforms such as Prospect are designed to help existing stockholders optimize their selling strategy, not to facilitate the purchase of shares.
What is the criteria to buy or invest in Helion stock?
Investing in a private company like Helion is typically reserved for venture capital firms and accredited investors who meet specific income or net worth thresholds defined by regulators. These opportunities are generally not available to the public until the company pursues an IPO.
