Commonwealth Fusion Systems

Commonwealth Fusion Systems is the world's largest and leading commercial fusion energy company, focused on developing high-temperature superconducting magnets to enable the transition to clean, abundant fusion energy

cfs.energy

Energy & Power

Sector

Seed

Stage

Energy production

Model

01Company Overview

02Backed By15 investors

FSFine Structure Ventures→CFCollab Fund→FC

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Footprint Coalition

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KVKhosla Ventures→

LCLowercarbon Capital→

MCMy Climate Journey Collective→

SVStarlight Ventures→

BEBreakthrough Energy Ventures→

DCDoorga Capital→

03Recent Activity

FROM Fine Structure Ventures

Portfolio company Commonwealth Fusion Systems raised $1B, bringing total capital to roughly $4B, to build its first commercial fusion power plant.

MILESTONE·techcrunch.com

JUL 30, 2026

FROM Breakthrough Energy Ventures

Breakthrough Energy Ventures increased its stake in Commonwealth Fusion Systems' $863M Series B2 round to accelerate commercialization of fusion energy.