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COMMONWEALTH FUSION SYSTEMS
Commonwealth Fusion Systems
Fusion energy · United States · Founded · 2018 · ≈ · 1,000 · employees

Commonwealth Fusion Systems Valuation

Private

Commonwealth Fusion Systems was last valued at $5B. The company is private, so there is no listed share price.

ProfileValuationFundingCompetitorsStock & IPOHow to invest
Commonwealth Fusion Systems valuation · at a glance
Lead investors
9
across 8 rounds
Raised across rounds
$5.8B
8 rounds
Date of last round
Jul 2026
closed 30 Jul 2026
Valuation history

How the Commonwealth Fusion Systems valuation has moved

One company valuation: $5B.

Undated: Series A at —; Undisclosed Round at —; Recent Round at —; Series A2 at —; Seed at —.
Funding rounds

Commonwealth Fusion Systems rounds and the valuation each one set

8 rounds
Round
Date
Amount
Valuation
Basis
Equity LATEST
30 Jul 2026
$1B
—
—
Series B2
28 Aug 2025
$863M
—
—
Series B
1 Nov 2021
$1.8B
—
—
Series A
—
$115M
—
—
Undisclosed Round
—
$863M
—
—
Recent Round
—
$1B
—
—
Series A2
—
$84M
—
—
Seed
—
$50M
—
—
Lead investors
Leads: Bill Gates, Breakthrough Energy Ventures, Devonshire Investors, Eni, Equinor, Google, Khosla Ventures, Temasek, Temasek Holdings.
Full funding history — Commonwealth Fusion Systems profile ›
What the valuation means

Frequently asked questions

What is Commonwealth Fusion Systems's valuation?›

The last valuation is $5B.

Who has invested in Commonwealth Fusion Systems?›

Lead investors for each round are in the funding timeline.

Who are Commonwealth Fusion Systems's competitors?›

The closest fusion energy peers are on the competitors page.

How can I get exposure to Commonwealth Fusion Systems?›

The routes section explains what is realistically available for a company at this stage.

Is Commonwealth Fusion Systems publicly traded?›

No. Commonwealth Fusion Systems is a private company; its shares do not trade on a public exchange.

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