No price data available from our provider
Valuation$3.7B1
Valuation DateSep 9, 2026
Implied Valuationn/a
Last Pricen/a
52-Week Highn/a
52-Week Lown/a
YTD Returnn/a
1-Year Returnn/a
3-Year Returnn/a
Total Funding$515M1, 2
Latest Round Amount$500M1
Latest RoundSeries A
Funding Rounds2
IPO StatusUnknown
Expected IPO Daten/a
Revenuen/a
Revenue Typen/a
P/S Ration/a

About Fab2

Fab2, formerly known as Atomic Semi, is a semiconductor company that designs and builds the tools, components and software needed to make chips, then mass-produces small, software-defined fabrication plants. The company calls its approach a "fab fab," a factory that turns out the compact fabs and the machines inside them, from pumps and valves to lithography tools, instead of buying that equipment off the shelf. It also builds Studio, a browser-based collaborative chip-design tool meant to move as fast as its fabs. Fab2 aims to make money by manufacturing chips in its own fabs and by producing the fabs and tooling themselves. It was co-founded in 2022 by Sam Zeloof, who became known for fabricating chips in his family garage as a teenager, and Jim Keller, a veteran chip architect behind AMD's Zen architecture, Apple's early mobile processors and Tesla's Autopilot chip who now also leads AI chipmaker Tenstorrent.

Founded 2022
Country United States
CEO Sam Zeloof
Founders Sam Zeloof, Jim Keller
Headquarters Austin, TX

News

Fab2 Raises $500M to Build Compact Chipmaking Facilities

Fab2, formerly Atomic Semi, raised $500 million in Series A funding at a $3.7 billion valuation led by Fundomo to scale compact semiconductor fabs.

4 weeks ago - citybiz

Fab2 Raises $500M at $3.7B Valuation to Mass-Produce Chip Fabs

Fab2 closed a $500 million Series A led by Fundomo at a $3.7 billion valuation, with participation from Corner Capital, Paradigm, Duquesne Family Office, Maverick Silicon, StepStone Group, Protagonist...

6 weeks ago - WOWTALE

Jim Keller's startup is building a factory to mass-produce small semiconductor fabs — Atomic Semi rebrands as 'Fab2'

Atomic Semi rebranded as Fab2 and moved its main operations to Texas, opening a 120,000-square-foot chip fab in Austin and a 30,000-square-foot 'fab fab' in Lockhart while keeping its original garage ...

3 months ago - Tom's Hardware

OpenAI in talks to back Zeloof and chip legend Keller's startup at $100 million valuation

TechCrunch reported that the OpenAI Startup Fund was in advanced talks to participate in a roughly $15 million seed round for Atomic Semi at a $100 million valuation. The startup, co-founded by Sam Ze...

3 years ago - TechCrunch