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Source Foundry

Stealth semiconductor-equipment startup building lithography tooling to challenge ASML's EUV monopoly.
Semiconductors Founded 2025
Current Valuation
$5.0B
as of 2026-08
UNICORN
Source Foundry is a stealth-mode semiconductor capital-equipment startup founded in 2025 by Stanford researchers Abdulmalik Obaid and Joe Burg. It is building machines, equipment and software that sit upstream of chip fabrication, starting with lithography - the step ASML dominates through the extreme ultraviolet (EUV) scanners required to pattern the most advanced logic and memory used in AI accelerators. Despite the name, the company is not a foundry in the TSMC sense: it does not fabricate chips for customers and is not positioned against contract manufacturers. Its stated target is the tooling and process layer, redesigned to serve AI-workload demand and to relieve what Sequoia partner Stephanie Zhan has called the tightest bottleneck in semiconductor manufacturing. The company operated with no public product, website or customer list through mid-2026. In August 2026 the Wall Street Journal reported that Leopold Aschenbrenner's hedge fund Situational Awareness had committed a further $400M, lifting its total position to roughly $500M, against a recent round valuing Source Foundry at $5B; Sequoia Capital is also a backer. That bet is notable for its timing - Situational Awareness had just taken heavy AI-related losses and sold its entire public equity book to Citadel in July 2026, making Source Foundry one of its largest remaining concentrated positions. Source Foundry should not be confused with Substrate, a separately funded, Thiel-backed startup pursuing the same ASML-challenger thesis via a different lithography technique.

Company Profile

Founded
2025
Growth
Reached a reported $5B valuation within roughly a year of incorporation, having raised at least several hundred million dollars, with no publicly disclosed product, revenue, customer or headcount
Last Round
Undisclosed (late-stage private) — $400M (Aug 2026) · Lead: Situational Awareness
IPO Status
private

Fundraising Status

Undisclosed (late-stage private) · $400M · this month
private3 disclosed rounds

Undisclosed (late-stage private) Impact

Round Size
$400M
Primary financing announced
Post-Money Valuation
$5.0B
Company-announced mark
Round / Post-Money
8.0%
New capital ÷ post-money
Step-up compares disclosed post-money valuations. Round / post-money is a financing-size ratio, not an ownership or dilution estimate.

Growth & Valuation

Capital raised per round
Capital raised per funding round$100MUndisclosed (earlier position)$400MUndisclosed (late-stage private)
Charts built from publicly disclosed funding rounds and revenue estimates. Approximate, not real-time, not investment advice.

Funding History

RoundAmountDateLead InvestorPost-Money
Undisclosed (late-stage private)$400MAug 2026Situational Awareness$5.0B
Undisclosed (earlier position)$100MSituational Awareness—
Undisclosed (Sequoia)—Sequoia Capital—

Founders & Key People

Abdulmalik ObaidJoe Burg

Investors

Situational Awareness · Sequoia Capital

Products

  • Lithography tooling for advanced-node semiconductor manufacturing (pre-product, in stealth)
  • Semiconductor manufacturing equipment and process systems upstream of fabrication
  • Software for semiconductor manufacturing tooling
  • Manufacturing processes redesigned around AI-accelerator workloads

Competitors

ASML · Canon · Nikon · Applied Materials · Lam Research · KLA · Tokyo Electron · Substrate
SemiconductorsSemiconductor EquipmentLithographyEUVDeep TechAI InfrastructureHard TechStealthSequoia-backedStanford
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of 2026-08. Refreshed quarterly.