Startup profile · funding coverage
Fab2 funding, valuation and investors
Vertically integrated semiconductor manufacturer building components, fab tools, complete fabs, and browser-based chip-design software.
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Funding, valuation & investors
Answer-first snapshotLatest funding
Series A
$500M · September 2026
Latest known valuation
$3.7B
Series A · September 2026
Total disclosed equity funding
$500M
Excludes debt, grants, acquisitions, secondaries, and IPO proceeds.
Current status
private
series a · Austin, Texas and San Francisco, California, USA
Investors in latest funding
Lead: Fundomo
Other: Paradigm , StepStone Group
Overview
Fab2, formerly Atomic Semi, was founded by Sam Zeloof and Jim Keller. It says it designs and manufactures fab components and tools, assembles complete semiconductor fabs, and develops Studio, a browser-based collaborative EDA product. Crunchbase News reported a $500M Series A at a $3.7B valuation in September 2026.
Why Fab2 is interesting
Fab2's reported $500M Series A at $3.7B finances an attempt to manufacture the equipment and factories behind chips, not only the chips themselves.
Product & use cases
Fab2 combines semiconductor equipment and component manufacturing, complete fab assembly, chip production, and collaborative EDA software.
- Build smaller software-defined semiconductor fabs
- Design chips in browser-based Studio
- Manufacture fab tools and components in-house
Key facts
- $500M Series A at $3.7B reported by Crunchbase News (Sep 11, 2026)
- Fundomo led; Fab2 lists Corner, Paradigm, Duquesne Family Office, Maverick Silicon, StepStone, Protagonist, UDC Ventures, Naval Ravikant and others
- Company lists 120,000 sq ft Austin fab, 30,000 sq ft Lockhart fab-factory, and 25,000 sq ft San Francisco garage fab
Funding history (newest first)
Series A
2026-09 $500M Valuation: $3.7B- Fundomo (lead)
- Paradigm (participant)
- StepStone Group (participant)
Market / IPO context
Editorial / static context — not a live quote.
Last updated:
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