United States · Growth startup

Who invested in Commonwealth Fusion Systems

2 rounds we have observed, with the 28 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

CleantechClimate TechEnergy

Raised 3 months ago

Funding summaryUpdated 5 Nov 2026

$1.9Braised across 2 rounds since 2025, from 4 sources

$863MSeries B$1.0BGrowth
Latest round
Growth, $1.0BJul 2026
Investors
28
See who backed them

The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2026
$863MSeries B$1.0BGrowth
First round
Series B, $863M
Aug 2025
Biggest round
$1.0B
Growth · Jul 2026
Between rounds
11 months
from the last two

The rounds

  1. Jul 2026
    Growth$1.0B4 returning

    Reported by TechCrunch and 1 other

  2. Aug 2025

Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

Everyone who backed them

Khosla VenturesVC firm2rounds
CoatueVC firm2rounds
HOF CapitalVC firm2rounds
Safar PartnersVC firm2rounds
Temasek HoldingsVC firm1round
Quiet CapitalVC firm1round
NVIDIACompany1round
GoogleAccelerator1round
Breakthrough EnergyVC firm1round
Lowercarbon CapitalVC firm1round
Galaxy InteractiveVC firm1round
Eric SchmidtCompany1round
Emerson CollectiveFamily office1round
HostplusPrivate equity1round
Gigascale CapitalVC firm1round
Brevan HowardAsset manager1round
Neva SGRVC firm1round
Gates FrontierGrowth equity1round
Nvidia's NVenturesGrowth equity1round
Planet First PartnersGrowth equity1round
Stanley DruckenmillerGrowth equity1round
Future VenturesVC firm1round
EniGrowth equity1round
FFA Private Bank in DubaiGrowth equity1round
Starlight VenturesVC firm1round

Missing a round, or an investor who was in one? Tell us.

Quick answers about Commonwealth Fusion Systems

Who invested in Commonwealth Fusion Systems?

Commonwealth Fusion Systems's investors include Khosla Ventures, Coatue, HOF Capital, Safar Partners and Tiger Global Management, and 23 more on record.

How much has Commonwealth Fusion Systems raised?

Commonwealth Fusion Systems has raised $1.9B across 2 rounds since 2025.

When did Commonwealth Fusion Systems last raise?

Commonwealth Fusion Systems's most recent round was a Growth of $1.0B in Jul 2026.

What was Commonwealth Fusion Systems's biggest round?

Its most recent round, $1.0B in Jul 2026, is also its largest on record.

Who backed Commonwealth Fusion Systems first?

Commonwealth Fusion Systems's first round on record, in Aug 2025, was backed by Khosla Ventures, Tiger Global Management and Coatue and 25 others.

What stage is Commonwealth Fusion Systems at?

Commonwealth Fusion Systems's latest named round is a Growth, in Jul 2026.

Where is Commonwealth Fusion Systems based?

Commonwealth Fusion Systems is based in the United States.

Companies like Commonwealth Fusion Systems

In the same sector, and raised in the last eighteen months.

Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.