Private Valuation & Funding Round Tracker · Commonwealth Fusion Systems

Commonwealth Fusion Systems funding rounds & valuation history

Name: Commonwealth Fusion Systems Funding Rounds & Valuation History
Creator: growthnavigatefunding.net

Commonwealth Fusion Systems (CFS), the MIT spin-out in Devens, Massachusetts, building the SPARC and ARC fusion machines. Funding from the Series A (close) to the Equity round (Jul 2026), sourced to CFS, TechCrunch and Canary Media.

Last updated: 13 Nov 2026 (IST). Every figure re-checked against the linked sources that day. Rows: 5 Currency: US$, nominal

⬇ Download CSV Cite this dataset Methodology & status definitions

Last closed round Closed

$1B

$1B Equity round (Jul 2026)

Raised in rounds listed

$3.862B

Sum of 5 closed rounds with a disclosed amount (GNF calc.)

Largest round

$1.8B

Series B, Dec 2021

Closed rounds listed

Jun 2019 to Jul 2026

Round history

Newest first. Dashed badges and striped rows are not closed transactions. “—” means the source does not disclose the figure or it cannot be computed on the same basis; see the note in each row.

Commonwealth Fusion Systems funding rounds, Jun 2019 to Jul 2026
Date	Status	Round	Amount	Lead / buyer	Valuation	Val. ÷ run-rate	Source
30 Jul 2026	Closed round	Equity round (Jul 2026)CFS says total raised is now $4B. Hyundai Motor Group’s investment (announced 10 Sep 2026) was part of this round. No valuation disclosed.	$1B	—Not disclosedWith: Pension funds, sovereign wealth funds, infrastructure and industrial investors incl. Hyundai Motor Group	Not disclosedNo company valuation stated by the source	—Not disclosedNo run-rate stated in the announcement	CFS, 30 Jul 2026Also: CFS, 10 Sep 2026
28 Aug 2025	Closed round	Series B2CFS says it has raised close to $3 billion to date.	$863M	—Not disclosedWith: Nvidia (NVentures), Google, Breakthrough Energy Ventures, Stanley Druckenmiller, Counterpoint Global and others	Not disclosedNo company valuation stated by the source	—Not disclosedNo run-rate stated in the announcement	CFS, 28 Aug 2025Also: TechCrunch, 28 Aug 2025
1 Dec 2021	Closed round	Series B	$1.8B	Tiger Global Management	Not disclosedNo company valuation stated by the source	—Not disclosedNo run-rate stated in the announcement	CFS, 1 Dec 2021Also: Canary Media, Dec 2021
26 May 2020	Closed round	Series A2	$84M	TemasekWith: Equinor, Devonshire Investors and existing investors	Not disclosedNo company valuation stated by the source	—Not disclosedNo run-rate stated in the announcement	TechCrunch, 26 May 2020
27 Jun 2019	Closed round	Series A (close)The closing tranche of the Series A that began in 2018.	$115M	—Not disclosed	Not disclosedNo company valuation stated by the source	—Not disclosedNo run-rate stated in the announcement	CFS, 27 Jun 2019

Step-up = valuation ÷ the prior closed valuation (GNF calc.), shown only where both figures were stated or reported and neither is a lower bound.

Amount raised in each closed round

Amounts raised, not valuations: CFS has never disclosed a valuation.

Series AJun 2019$115M
A2May 2020$84M
Series BDec 2021$1.8B
B2Aug 2025$863M
Jul 2026Jul 2026$1B

Sources: CFS, TechCrunch, Canary Media. US$ billions, linear scale.

Timeline

Each round and share sale, oldest first.

27 Jun 2019 · Closed
Series A (close): $115M.
26 May 2020 · Closed
Series A2: $84M led by Temasek.
1 Dec 2021 · Closed
Series B: $1.8B led by Tiger Global Management.
28 Aug 2025 · Closed
Series B2: $863M.
30 Jul 2026 · Closed
Equity round (Jul 2026): $1B.

Still private: Commonwealth Fusion Systems has not filed for an IPO and is not owned by a listed company. It has not disclosed a valuation in any round.

Cite this dataset

Free to quote with a link back. Copy this citation:

Commonwealth Fusion Systems Funding Rounds & Valuation History. Private Valuation & Funding Round Tracker, GrowthNavigateFunding.net, updated 13 Nov 2026. https://growthnavigatefunding.net/funding/commonwealth-fusion-systems/

Download the data

The same 5 rows as the table: numeric US$ columns, empty cells where a figure is not disclosed, and a source URL for every row.

File: commonwealth-fusion-systems-rounds.csv (UTF-8, comma-separated)
Stable URL: https://growthnavigatefunding.net/wp-content/uploads/2026/11/commonwealth-fusion-systems-rounds.csv
Columns: id, date, date_precision, status, transaction_type, round, amount_usd_low, amount_usd_high, lead_or_buyer, co_leads, valuation_usd_low, valuation_usd_high, valuation_basis, valuation_to_run_rate_multiple, multiple_bound, multiple_basis, step_up_vs_prior_closed, price_per_share_usd_low, price_per_share_usd_high, shares, source, source_url, other_source_urls, notes, last_updated
Updated: 13 Nov 2026 (IST)

⬇ Download CSV

Methodology & status definitions

How each row is labelled and calculated.

Closed round

A primary round announced by the company or confirmed in the press, bringing new money to the company.

Valuation ÷ run-rate

Post-money valuation ÷ the run-rate the company stated in that announcement (GNF calc.). Where the run-rate is “crossed” or “over” a figure, the multiple is shown as “under X×”. No row qualifies here unless shown, so no multiple is invented.

What is not a separate row

The 2018 initial Series A tranche, grants and government awards (e.g. DOE milestone funding), and offtake agreements with Google and Eni.

Updates & corrections

This page stays at one address and is updated in place; the “Last updated” date above drives the citation and the dataset metadata. Corrections: hello@growthnavigatefunding.net. Informational only; not investment advice.

Changelog

13 Nov 2026: Dataset first compiled (batch 3, not yet published).

Commonwealth Fusion Systems Funding Rounds & Valuation History (2019–2026)