US Commerce Secretary Howard Lutnick has told senior ASML executives in recent meetings that he believes one of the Dutch company's extreme ultraviolet lithography machines may have made it into China, a direct breach of export controls in place since the first Trump administration. ASML says no EUV machine has ever been shipped to China and none exists there. Senior administration officials say they have evidence of EUV-related components and transport equipment moving to China but have not produced it, either to the company or publicly.
The stakes are unusually high for a dispute most readers will never have heard a company name involved in. ASML is the sole producer of EUV lithography systems, the only tools on Earth capable of printing the most advanced semiconductor patterns. Every cutting-edge processor TSMC manufactures for Nvidia and Apple depends on ASML hardware that took roughly two decades and billions of dollars to develop. There is no second supplier.
That monopoly has pushed ASML's market capitalization to roughly $700 billion as of this week, up sharply over the past year on AI-driven chip demand, making it Europe's most valuable public company. A single confirmed EUV machine in Chinese hands would be one of the most consequential breaches of the US export-control regime built to keep advanced AI compute out of Beijing's reach. The Commerce Department has not responded to questions about whether physical evidence of an EUV system on Chinese soil exists.
Key facts
- 01US Commerce Secretary Howard Lutnick told ASML executives he believes an EUV machine may have reached China, a breach of export controls in place since the first Trump administration.
- 02ASML's market cap sits near $700 billion, making it Europe's most valuable public company on the back of AI-driven chip demand.
- 03ASML expects roughly 20% of its 2026 revenue from already-permitted China sales, primarily older DUV tools first shipped a decade ago.
- 04The Commerce Department, under Lutnick, committed up to $150 million to xLight, a startup developing next-generation EUV light-source technology.
- 05A bipartisan bill that cleared committee in April would ban all DUV shipments to China, threatening roughly one-fifth of ASML's 2026 revenue.
ASML CEO Christophe Fouquet, in an interview six weeks before the allegations surfaced, addressed the China question directly. He said every machine the company has ever shipped is either in active use with a monitored customer or has been dismantled and returned. He described an internal firewall, built years ago, that walls off employees with access to EUV technology, documentation, and training from those without it, with ASML's China-based staff sitting on the restricted side by design.
Fouquet's technical argument cuts against the feasibility of replication. He said 80% of an EUV machine draws on decades of prior knowledge, and the one genuinely new problem, generating EUV light itself, took 20 years to solve. The implication: reverse-engineering is not the issue Washington thinks it is.
There is also a straightforward commercial argument. ASML continues to sell older deep ultraviolet tools to China, gear it first shipped a decade ago, and Fouquet framed those sales as a protective calculation, not a loophole. Keeping a generational gap, he suggested, lets the company hold the relationship without manufacturing its own future competitor. ASML expects roughly 20% of its 2026 revenue from already-permitted China sales. Risking the EUV ban over a single illegal shipment would put that revenue, and the company's standing, on the line.
None of that proves the US claim is wrong. The Commerce Department has not published evidence, and judgment should wait until it does. The pattern of the allegation, however, sits inside a broader US push to develop alternatives to ASML's monopoly that is worth examining on its own terms.
Late last year, the Commerce Department under Lutnick committed up to $150 million in taxpayer money to xLight, a startup building next-generation EUV light-source technology. xLight's CEO has described the company as a future partner to ASML rather than a rival, building hardware meant to plug into existing machines. When that framing was put to Fouquet in May, he was polite but unconvinced, signaling ASML does not see itself as needing xLight to keep its lead. Peter Thiel has separately backed Substrate, another startup pursuing its own EUV-rival technology with more direct competitive ambitions.
A bipartisan bill moving through Congress would go further than EUV. It calls for an effective ban on all of ASML's DUV shipments to China, the less advanced tools that account for roughly one-fifth of expected 2026 revenue. The bill cleared a key committee in April, and the Trump administration has not taken a formal position. If it passes, the China revenue line ASML has been protecting with its older-tool strategy disappears almost entirely.
The pressure on ASML is the pressure on the entire advanced-AI supply chain. There is one company in the world capable of printing the chips that train frontier models, and the US government is simultaneously accusing it of leaking that capability, funding a startup positioned to encroach on its core technology, and weighing legislation that would cut a fifth of its revenue. Even if the EUV-in-China allegation collapses for lack of evidence, the cumulative effect is the same: ASML's monopoly is now a policy variable, and every hyperscaler buying Nvidia chips downstream of TSMC has a new political risk to model.
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