The US Commerce Department is accusing ASML, Europe's most valuable company, of potentially allowing advanced chipmaking technology to reach China, a claim the Dutch firm flatly denies. Commerce Secretary Howard Lutnick raised concerns directly with ASML's leadership about whether its extreme ultraviolet (EUV) lithography machines, the only tools on Earth capable of producing the most advanced semiconductor patterns, may have slipped into Beijing's hands. The accusation strikes at the heart of America's multi-year effort to keep cutting-edge chip technology out of China's reach, and it reveals a critical vulnerability in the global supply chain that powers artificial intelligence development worldwide.

Why Does One Dutch Company Matter So Much to Global AI?

ASML may not be a household name, but it occupies a position of extraordinary power in the technology world. The company manufactures the machines that TSMC uses to produce chips for Nvidia and Apple, and there is no alternative supplier anywhere on Earth. This monopoly has pushed ASML's market value to roughly $700 billion, making it Europe's most valuable public company. Each EUV system is roughly the size of a school bus and weighs 180 tons, which is precisely why a single missing machine would represent a catastrophic breach in US export controls.

The stakes extend far beyond one company's reputation. EUV machines are the technological foundation of the entire AI buildout. Without access to these tools, China cannot manufacture the most advanced semiconductors needed to compete in artificial intelligence. The US has barred ASML from selling EUV systems to China since the first Trump administration, making this accusation a direct challenge to that policy's effectiveness.

What Evidence Exists, and Why Isn't It Public?

The dispute hinges on a fundamental problem: the US claims to have evidence, but hasn't shared it. Senior administration officials told Bloomberg they possess evidence that ASML shipped EUV-related components and transport gear to China, yet they have not produced this evidence publicly or, apparently, to ASML itself. The Commerce Department has not clarified whether it has evidence of an actual complete machine on Chinese soil, or merely components and shipping materials.

ASML's response is equally firm. The company told Reuters it has never shipped an EUV machine to China, nor any component or module specially designed for one. The firm maintains detailed records of every machine it has ever manufactured, with each unit either in use with monitored customers or dismantled and returned. ASML's CEO Christophe Fouquet has argued that reverse-engineering a machine one has never possessed is impossible, and that the company built an internal firewall years ago that separates its China-based staff from EUV technology and training.

What Are the Commercial Pressures Behind This Dispute?

ASML has significant financial incentive to maintain its denial. The company expects roughly 20% of its 2026 revenue from already-permitted sales to China, primarily older deep ultraviolet (DUV) tools used for less advanced chip production. If the company were caught violating the EUV ban, it would risk losing that revenue stream and its standing as Europe's most valuable monopoly. However, the pressure may intensify further. A bipartisan bill moving through Congress would ban all DUV shipments to China entirely, a measure that cleared a key committee in April. The Trump administration has not yet taken a formal position on this broader restriction.

How Are Export Controls Affecting Other Companies?

The ASML case is not isolated. Other companies are already facing severe penalties for maintaining business relationships with sanctioned Chinese firms. German manufacturer Bosch agreed to pay a $36 million fine after it was discovered that two of its non-US subsidiaries sold handset-related parts to Huawei between 2020 and 2024 without a license. The components included sensors and software designed for smartphones, and the two entities completed approximately 100 deals totaling roughly $70 million in sales before the violation was discovered. Bosch stated that the violations were unintentional, but the scale of the sales suggests the company had substantial financial motivation to continue the arrangement.

Steps Companies Can Take to Navigate Export Control Compliance

• Implement Comprehensive Tracking Systems: Maintain detailed records of every product manufactured, shipped, and customer relationship, similar to ASML's approach of tracking every machine it has ever produced and its current location or status.
• Establish Internal Compliance Firewalls: Create organizational barriers that separate sensitive technology development teams from staff in restricted countries, preventing inadvertent knowledge transfer or unauthorized access to advanced technology.
• Conduct Regular Audits of Subsidiary Operations: Monitor all non-US subsidiaries and business partners to ensure they are not selling restricted components to sanctioned entities, as Bosch's experience demonstrates the risks of inadequate oversight.
• Develop Transparent Communication Protocols: Establish clear channels for dialogue with government regulators and be prepared to provide documentation of compliance measures, rather than relying solely on denial of allegations.

The Bosch case illustrates a broader pattern emerging in export control enforcement. While Huawei itself has managed to circumvent US sanctions through various workarounds, the companies that supply it are bearing the financial consequences. Bosch agreed to disgorge its profits from the illegal sales and committed to enhancing its trade compliance program to prevent future violations. The company now operates under US government scrutiny, making it far more difficult to continue serving Chinese customers who are on the export control list.

What Does This Mean for the Future of Global Chip Supply Chains?

The ASML dispute and the Bosch fine signal that the US is intensifying enforcement of export controls across the entire technology supply chain. Companies that manufacture components, transport equipment, or provide services to restricted entities face substantial financial and reputational risk. The lack of public evidence in the ASML case, combined with the aggressive tone of Commerce Secretary Lutnick's warnings, suggests that US officials are willing to apply pressure even when they have not disclosed their full case.

For European companies like ASML, the situation presents a difficult balancing act. They depend on sales to China for revenue, yet they face pressure from the US government to enforce restrictions that limit their market access. The broader bipartisan push to ban all DUV sales to China would eliminate a significant portion of ASML's permitted revenue stream, forcing the company to choose between compliance and profitability. As export controls tighten, companies across the technology sector will need to make similar choices about which markets they can serve and which they must abandon.