X-energy key facts
as of Oct 2026- X-Energy Inc is a leading developer of advanced SMR and fuel technology for clean energy generation.
- X-energy is valued at approximately $3.8B as of Oct 2026, per PrivateMarketView’s mark.
- It has raised $1.8B; the latest was IPO ($750.0M) in Mar 2026.
- Notable investors include Alumni Ventures, U.S. Department of Energy, Menlo Ventures, Point72 Ventures, Emerson Collective — 50 tracked in total.
- 3 institutional filers report fund marks on X-energy across 4 filings.
- PrivateMarketView tracks 9 recorded secondary trades in X-energy shares.
- 1 investment vehicle was formed to buy X-energy shares in the last 12 months, reporting $19.0M sold to 1 investors, per SEC Form D filings.
- Status: In IPO Registration.
Membership and data by Private Market View
- ·The complete investor list: 50 names
- ·Watch X-energy: the Monday email on marks, rounds and moves
X-energy secondary trades
9 on record · Dec 2025 – Apr 20269 trades between Dec 2025 and Apr 2026. Exact dates, prices and structures are available to Pro members.
Membership and data by Private Market View
Institutional fund marks on X-energy
3 filers · latest Jul 20263 SEC-registered funds reported 4 fair-value marks on X-energy between Apr 2026 and Jul 2026. Filer-level marks and implied $/share are available to Pro members.
Membership and data by Private Market View
X-energy funding rounds
No funding rounds for X-energy are on record yet — either the company hasn't raised institutional capital, or the raise hasn't surfaced in our sources.
Vehicles formed to buy X-energy shares
secondary demand · SEC Form D filingsIn the last 12 months, 1 investment vehicle were formed to buy X-energy shares, reporting $19.0M sold to 1 investors. Most recent filing Feb 2026.
Membership and data by Private Market View
Who backs X-energy
50+X-energy valuation
X-energy is valued at approximately $3.8 billion as of Oct 2026. The figure is set by institutional fund marks.
Recent activity
In the last 90 days, X-energy's record added 1 institutional fund mark (latest period Jul 2026).
X-energy secondary market activity
9 secondary trades in X-energy shares are on record, between Dec 2025 and Apr 2026. The busiest recent months were Jan 2026 (4 prints) and Apr 2026 (3 prints). Exact dates, prices and structures are available to Pro members.
Institutional holders and vehicles
3 SEC-registered funds reported 4 fair-value marks on X-energy between Apr 2026 and Jul 2026, in their N-PORT filings. Filer-level marks and implied per-share values are available to Pro members.
In the last 12 months, 1 investment vehicle was formed to buy X-energy shares, reporting $19 million sold to 1 investor, per SEC Form D filings (most recent Feb 2026).
X-energy investors
50 investors are on record for X-energy, including Alumni Ventures, U.S. Department of Energy, Menlo Ventures and Point72 Ventures. By type, the record holds 12 venture capital firms and 2 family offices.
About X-energy
X-Energy Inc is a leading developer of advanced SMR and fuel technology for clean energy generation. It is seeking to redefine the nuclear energy industry through its flagship product, the Xe-100, an advanced small modular HTGR designed to generate up to 80 megawatts of electric power and/or up to 200 megawatts of thermal output, depending on the configuration. X-energy's simple and intrinsically safe advanced SMR designs, like the Xe-100, significantly expand the applications and markets for nuclear technology with enhanced safety, lower cost and faster construction timelines when compared with conventional nuclear energy sources and broader use cases when compared with other SMRs.
- Sector
- Energy
- HQ
- Rockville, MD, United States
- Founded
- 2009
- Employees
- 916
- Website
- x-energy.com/
- Ownership
- In IPO Registration
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