X-energy

Rockville, MD · Founded 2009 · In IPO Registration

X-Energy Inc is a leading developer of advanced SMR and fuel technology for clean energy generation. X-energy is based in Rockville, MD and was founded in 2009. It is valued at about $3.8 billion as of Oct 2026, set by institutional fund marks. It has raised $1.8 billion.

PMV mark · valuation
$3.8B
Oct 2026
Since last round
-45%
Total raised
$1.8B
Last round
—
What is X-energy worth?
$3.8BPrivateMarketView mark · Oct 2026

Pro
The prices on X-energy
  • ·Every dated print: 9 trades with prices and structures
  • ·4 fund marks: filer, period, implied $/share
  • ·1 investment vehicle formed around X-energy: sponsors, sizes, dates
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Valuation timeline

0 priced rounds · 32 daily marks since · Sep 2026 – Oct 2026
▮▮
Markrounds hold their value until the next priced eventMark, today
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X-energy funding history

No rounds on record

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.

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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).

How X-energy's valuation is determined

Private company valuations aren’t quoted on an exchange — they’re established in moments: a priced funding round sets a post-money valuation, secondary trades print at a price per share, and SEC-registered funds holding the stock report fair-value marks in their N-PORT filings.

For X-energy, the most current credible signal sets the number and the older ones confirm it: a live secondary-market price first, then three or more recent prints, then institutional fund marks, and otherwise the last priced round, which never decays. The valuation is the last round’s post-money moved by the price change since that round, so no share count is assumed. Today it is set by institutional fund marks. Question about this number? Full methodology →

Frequently asked about X-energy

What is X-energy worth?
X-energy is valued at $3.8B as of Oct 2026.
How much has X-energy raised?
X-energy has raised $1.8B in total funding across its recorded rounds.