X-Energy IPO: Date, Price, Terms, and S-1 Filing
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The X-Energy IPO date was Friday, April 24th, 2026. The deal priced at $23 per share, and opened for trading at 12:50 pm ET at $30.33 per share.
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Table of Contents
Notable X-Energy News
04/23/2026: X-Energy Raises $1.02 Billion in IPO
03/20/2026: X-Energy Files for an IPO
11/24/2025: X-Energy Closes $700 Million Series D
02/06/2025: X-Energy Closes $700 Million Series C-1
About X-Energy
X-Energy is a Rockville, Maryland-based nuclear reactor design and fuel technology company working to make small modular reactors (SMRs) a practical, scalable solution for clean energy.
Founded in 2009 by entrepreneur Kam Ghaffarian, the company was built on the conviction that nuclear power was the only technology capable of delivering clean, reliable, and affordable electricity that scales globally.
Its cornerstone product, the XE-100, is a high-temperature gas-cooled pebble-bed reactor designed to be smaller, safer, and faster to build than conventional nuclear plants.
The company also manufactures its proprietary TRISO-X fuel, in which uranium particles are sealed in a protective coating engineered to prevent meltdown.
X-Energy has secured substantial backing from both the Department of Energy and private investors, and has partnered with major industrial companies like Dow to deploy the XE-100 at commercial sites.
In a field that includes competitors like TerraPower, NuScale, and Kairos Power, X-Energy differentiates itself through its combined reactor-and-fuel approach and its early access to DOE demonstration funding.
With electricity demand surging, driven in part by AI data centers, X-Energy is positioned to benefit as policymakers and corporations increasingly treat nuclear power as a cornerstone of the energy transition.
IPO Terms
- X-Energy IPO Date: Friday, April 24th
- Symbol: XE
- Exchange: Nasdaq
- Offering: 42,857,143 shares
- Initial Price Range: $16-$19
- Final IPO Price: $23
- Raise: $1.00 billion
- Market Cap: ~9.1 billion
- Opening Trade: $30.33 per share
- Underwriters: JPMorgan, Morgan Stanley, Jeffries
X-Energy S-1 Filing
Here’s a copy of the initial S-1 filing, released to the public on March 20th, 2026.
Monitor the latest filings on the SEC website.
Ownership
X-Energy is a venture-backed startup owned by its founders, employees, and multiple venture capital firms.
Notable venture capital investors include ARK Invest, Hood River, Point72, Reaves Asset Management, XTX Ventures, Corner Capital, Galvanize, Jane Street, Emerson Collective, Segra, NGP Energy Capital, Citadel, University of Michigan, The Climate Pledge Fund, Ares Management, Ruisheng Group, Kam Ghaffarian, Ontario Power Generation, C5 Capital, Alumni Ventures, Westwood Ventures, Towerview Ventures, and Bascom Ventures.
X-Energy has also received multiple grants from the U.S. Department of Energy.
Funding Rounds
| Round | Date | Est. Valuation | Raise Amount |
|---|---|---|---|
| Series D | 11/23/25 | NA | $700.0M |
| Series C Extension | 02/05/25 | NA | $700.0M |
| Series C | 12/04/23 | NA | $235.0M |
| Series B | 09/30/21 | NA | $110.0M |
| Source: Caplight |
Valuation
X-Energy has not confirmed its valuation in recent Series funding rounds, and information on its valuation is not currently available.
When X-Energy sets IPO terms, we can calculate the anticipated IPO market cap.
IPO Potential
X-Energy filed for an IPO on March 20th, 2026. The IPO date was Friday, April 24th, 2026.
The company filed confidentially in November 2025. Annual revenues ending December 31st, 2025, were about $109 million.
Now that the S-1 filing is available for public review, we await an amended filing providing the offering and deal market cap. At that point, X-Energy will kick off its IPO roadshow, and the countdown to the IPO begins.
How to Invest in X-Energy Stock
X-Energy is now a public company. Investors can buy the stock from any online broker, including the ones that offer IPO access to retain investors.
Conclusion
X-Energy looks to enter the public markets when nuclear energy has regained credibility with both policymakers and institutional capital due to the AI phenomenon.
The company’s dual focus on reactor design and proprietary fuel manufacturing gives it a structural differentiator that most competitors lack.
The quietly-reported confidential filing followed the massive Series D round, suggesting the company timed its IPO push deliberately, with momentum and strategic investors rather than necessity.
Nuclear energy is a slow-growth, capital-intensive industry that will likely not return immediate returns as we see in tech. It could eventually trade more like a utility than a tech company.
But for now, investors seek many variations of the AI/energy trade, and nuclear is an important future component, if not immediately.
For investors over the long haul, the most meaningful question is whether X-Energy can convert DOE funding and commercial partnerships into recurring revenue at scale.
Interested investors can review the amended S-1 carefully, paying particular attention to capital expenditure projections and the timeline assumptions baked into its commercialization roadmap.
If you are interested in the X-Energy IPO, perform personalized due diligence and only speculate with money you can afford to lose.
Frequently Asked Questions (FAQs)
Craig Stephens founded Access IPOs in 2016 to help ordinary investors explore IPO and pre-IPO opportunities. He also manages the Access Club, a membership community for IPO and startup investors. Craig studied Finance at Michigan State University and lives in Northern Virginia. Learn more about Craig.
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