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Fab2

FA
SemiconductorsFounded 2023Website@fab2
#222 by valuation

Fab2 (formerly Atomic Semi) builds modular, factory-produced semiconductor micro-fabs plus the robotics and software that run them, so chip capacity can be stood up in months rather than years.

Founded by Sam Zeloof (Co-Founder), Jim Keller (Co-Founder)

$3.7B
Valuation history
Weekly blended valuation with priced funding rounds marked on the timeline.
$3.8B
blended valuationfunding round
Sep 7, 2026$3.6BOct 19, 2026
All rounds
2 funding rounds, newest first.
RoundAnnouncedRaisedPost-money
Series ASep 9, 2026$500M$3.7B
RoundJun 28, 2023$15M$115M
Investors
9 investors across all rounds.
  • CV
    Corner Ventures
  • NR
    Naval Ravikant
  • PA
    Paradigm
  • SG
    StepStone Group
  • DF
    Duquesne Family Office
  • FU
    Fundomo
  • MS
    Maverick Silicon
  • PR
    Protagonist
  • UV
    UDC Ventures

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Data as of .