Commonwealth Fusion Systems Stock Price, Valuation & IPO
Private company — Commonwealth Fusion Systems is privately held. Its shares are not listed on any public exchange and can only be accessed through private secondary transactions.
Status source: AXEVIL investment team
$262.42 per share (AXEVIL consensus estimate)
Source: AXEVIL consensus of recent secondary transactions · as of 27 October 2026
Total raised: $4B
Data last updated: 27 October 2026
About Commonwealth Fusion Systems
An MIT spinoff. Building commercial fusion power plants based on a tokamak with high-temperature superconducting magnets. The SPARC device is set to demonstrate net energy gain, to be followed by the commercial ARC plant.
Commonwealth Fusion Systems is a US fusion energy company spun out of MIT in 2018, headquartered in Devens. It builds power plants based on the tokamak — a donut-shaped device that confines plasma with a magnetic field. Its key innovation is high-temperature superconducting magnets, which make the reactor several times more compact than earlier designs; a 20-tesla magnet was successfully tested in September 2021. The SPARC demonstration device in Devens is roughly 80% complete and is expected to produce more energy than it consumes for the first time in 2027. It will be followed by the 400 MW ARC plant in Virginia, half of whose output has already been contracted by Google. The company has raised $4 billion in total, with the most recent round — $1 billion — closed in July 2026.
- Sector: Energy
- Headquarters: Devens, Massachusetts, USA
- Founded: 2018
Key highlights
- Net energy gain at SPARC. If SPARC produces more energy than it consumes in 2027, CFS will be the first company to demonstrate this on a magnetic confinement device. The device is designed for a tenfold energy gain, giving it headroom above the breakeven threshold.
- A fleet of plants after the first ARC. Google holds an option on energy from future plants, and ARC itself repeats SPARC's design. Each new plant is built from a proven design, lowering its cost.
- Magnets as a standalone business. The Devens factory is already producing superconducting magnets at scale for SPARC. Selling these magnets to other developers, starting with Realta Fusion, generates revenue well ahead of ARC's launch.
- Asia as a second market. Hyundai Motor Group and CFS are exploring building a fusion plant in South Korea, where fusion is a priority technology. Its cap table already includes a Japanese consortium led by Mitsui and Mitsubishi, along with Singapore's Temasek.
- In-house fuel for the plants. The UK's UKAEA LIBRTI program, worth £220 million, will test how a plant can breed its own tritium, one of two fuel components. CFS became its first foreign participant and gained access to a powerful neutron source.
- Government support. In August 2026, the US Department of Energy credited CFS with two more milestones under its fusion support program, now for the ARC plant. These milestones unlock government co-financing and speed up approvals.
Latest news
- US Department of Energy selected CFS to lead the SPARC reactor AI twin project as part of the Genesis Mission — 8 October 2026
- Commonwealth Fusion Systems ordered over 10 000 km of superconducting tape from Fujikura — the largest order in history for ARC power plants. — 30 September 2026
Frequently asked questions
How can I buy Commonwealth Fusion Systems stock before the IPO?
Not on a public exchange — Commonwealth Fusion Systems is privately held. Shares change hands only in private secondary transactions. AXEVIL structures those as dedicated US special purpose vehicles for accredited investors, subject to availability and to the rules of your jurisdiction.
What is the Commonwealth Fusion Systems stock price?
A private company has no single official share price. AXEVIL's consensus estimate is $262.42 per share as of 27 October 2026.
What is Commonwealth Fusion Systems's valuation (net worth)?
AXEVIL does not have a verified valuation for Commonwealth Fusion Systems at the moment; it appears here once a priced round is on record.
When will Commonwealth Fusion Systems IPO?
No listing has been announced. AXEVIL does not forecast IPO dates — this page states what has actually been filed or reported, with the date it was last checked.
Is Commonwealth Fusion Systems publicly traded?
No. Commonwealth Fusion Systems is a private company and its shares are not listed on any public exchange.
Does Commonwealth Fusion Systems have a stock symbol?
No. Commonwealth Fusion Systems has no ticker symbol because its shares are not listed on any exchange; a symbol is assigned only at an IPO or direct listing.
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Risk disclosure
Nothing on this page is an offer to sell or a solicitation to buy any security, and it is not investment advice. Valuations and share prices shown here are AXEVIL estimates built from primary sources — filings, announced rounds and completed secondary transactions — not quoted market prices, and they can be revised. Private-company shares are illiquid, may be impossible to sell, and the entire amount invested can be lost. Availability depends on your jurisdiction and on accredited-investor status.