ASML in Veldhoven ships each EUV lithography machine in roughly 250 crates aboard multiple Boeing 747s, the mirrors inside are polished so finely that scaled to the size of Germany the largest bump would be under a millimetre tall, and every advanced chip in every iPhone on Earth passes through one of these machines before it reaches a pocket

In June 2026, behind closed doors in Washington, US Commerce Secretary Howard Lutnick sat across from ASML’s senior leadership and accused them, in substance, of letting the most strategically guarded machine on Earth slip into China. Bloomberg first reported the meetings on 18 June. ASML shares fell as much as 2.7% in Amsterdam trading before a partial recovery.

The accusation concerned an extreme ultraviolet lithography machine, or components designed for one, that may have reached China in violation of export controls in place since the first Trump administration. ASML’s response was unusually direct for a company known for diplomatic restraint. It told Reuters it had never shipped an EUV machine to China, nor any components specially designed for EUV machines. To back the denial, the company circulated a document in Washington listing 314 operational and 26 decommissioned units by location. None, the company insists, are in China.

That insistence is now the centre of the most consequential export-control fight of the decade.

The machine inside the controversy

To understand why Lutnick reportedly took ASML leadership behind closed doors over allegations that an EUV system or its components had reached China, you first have to understand what these machines actually do.

Inside each EUV scanner, a vacuum chamber fires 50,000 microscopic droplets of molten tin per second into empty space. A two-pulse carbon-dioxide laser, built by Germany’s TRUMPF, hits each droplet twice. The first pulse flattens it into a disc. The second heats it to roughly 220,000 degrees Celsius, about 40 times the surface temperature of the sun, generating a plasma that emits extreme ultraviolet light at a wavelength of 13.5 nanometres.

That light is absorbed by air. It is also absorbed by glass. So the entire optical path operates in vacuum, bouncing off mirrors made by Germany’s Carl Zeiss SMT to tolerances measured in fractions of a nanometre. Scaled up to the size of Germany, the largest bump on those mirrors would be under a millimetre tall. That is not marketing copy. It is the manufacturing specification the machines require to print transistors a few atoms wide.

Every advanced chip in every iPhone on Earth passes through one of these scanners before it ever reaches a pocket. So does every Nvidia GPU training a frontier AI model, every advanced AMD processor, every high-bandwidth memory die feeding a data centre.

An EUV machine weighs roughly 180 metric tons, occupies the footprint of a school bus, and contains more than 100,000 individual components. ASML says it can name the location of every single one.

Why you cannot smuggle one

An EUV system arrives at a fabrication plant in dozens of specialised freight loads. Industry estimates have long put the number of crates per machine somewhere around 250, with the equipment travelling on multiple Boeing 747 freighters between ASML’s Veldhoven campus and customer sites in Taiwan, South Korea, the United States and Japan. Installation takes months. The collector mirror, the component that gathers EUV light radiating off the tin plasma, degrades from tin contamination and must be replaced roughly once a year.

None of this happens without ASML engineers physically present.

The company has built that dependency directly into the architecture. According to reports, ASML’s remote telemetry systems can automatically detect interruptions, abnormal behavior, or loss of connectivity across its EUV fleet. According to reports, customers cannot remove, transport, or relocate EUV systems without ASML’s involvement. Translation: the company is not just saying no machine went to China. It is saying its own monitoring would have flagged the silence if one had.

The framing shift

The Dutch Ministry of Foreign Affairs stated that the Netherlands enforces the European Dual-Use Regulation very strictly. The Dutch Ministry added that it steps in where necessary to enforce regulations.

Then the framing shifted. Senior Trump administration officials subsequently narrowed the claim: not a complete machine, but specialised transport equipment and components associated with EUV systems. The distinction matters. A whole machine is something ASML’s telemetry should catch. A component routed through a third-party supplier is something it might not.

What ASML earns from China, and what it stands to lose

The EUV fight is unfolding while a larger legislative threat is closing in on ASML’s remaining China business. In April 2026, a bipartisan group of US lawmakers introduced the Multilateral Alignment of Technology Controls on Hardware Act, the MATCH Act, which would ban exports of older deep ultraviolet (DUV) lithography machines to China and require allies to align with US controls within 150 days or face unilateral action under the Foreign Direct Product Rule.

The bill cleared the House Foreign Affairs Committee on 22 April 2026. It has not yet passed Congress.

The numbers attached to it are large. ASML expects roughly 20% of its 2026 revenue to come from already-permitted DUV sales to China, a business the MATCH Act would kill. China was ASML’s largest market in the fourth quarter of 2025, accounting for 36% of net system sales, before export controls cut that share to 19% in the first quarter of 2026. Analysts at Quilter Cheviot estimate a broad DUV ban could mean roughly a 5% hit to overall revenue.

None of which has stopped some Wall Street desks from getting bullish. Morgan Stanley believes ASML could double its earnings in 2027 versus 2025 levels on the back of AI-driven capex from chipmakers like TSMC, Samsung and Intel. The argument: even with China cut off, the rest of the world is buying faster than ASML can build.

The conflict of interest few are mentioning

There is a structural detail in this story that has drawn quiet attention from independent analysts. The same Commerce Department now pressing ASML on export compliance is, separately, a direct equity stakeholder in a startup positioned to challenge the core of ASML’s monopoly.

In December 2025, Lutnick’s department signed a $150 million letter of intent with xLight, a Palo Alto-based company developing a free-electron laser as an alternative EUV light source under the CHIPS and Science Act. Under the agreement, the department receives $150 million in equity in xLight. The company says it sees itself as a partner to ASML, not a rival, intending the technology to be integrated into ASML’s existing scanner architecture. Nothing public connects the xLight investment to the Lutnick confrontation.

But the alignment is unusual: a federal official scrutinising a monopoly while his agency holds equity in the technology that would erode that monopoly’s chokepoint. Anyone trying to read Washington’s posture toward ASML now has to hold three facts in view at once. It relies on ASML’s monopoly to enforce controls against China. It is accusing ASML of potentially compromising that monopoly. And it is funding a technology designed to reduce US dependence on it.

The Shenzhen prototype

The backdrop to all of this is a development that surfaced in Reuters reporting in December 2025: a team in Shenzhen, including former ASML head of light-source technology Lin Nan, has completed a prototype EUV machine. They reverse-engineered components from older ASML systems acquired through secondary markets and pulled export-restricted parts from Nikon and Canon through intermediary suppliers. The prototype fills nearly an entire factory floor. It generates extreme ultraviolet light. It has not yet produced working chips.

Chinese authorities have set a 2028 target for working chips from the system. Independent analysts consider 2030 more realistic. ASML CEO Christophe Fouquet has stated that China would need many years to develop competitive EUV technology.

The hardest problem the Shenzhen team faces is the one that cannot be reverse-engineered: the Carl Zeiss SMT mirrors. Replicating subnanometre optical tolerances is not a question of obtaining a sample and copying it. It is a question of having the metrology, the polishing equipment, and the institutional knowledge accumulated over decades of Zeiss-ASML collaboration. China does not yet have it.

The strategic shape of the standoff

The question of whether anything EUV-related did reach China is now in the hands of the Commerce Department’s Bureau of Industry and Security, which administers the Export Administration Regulations. US officials declined to share evidence with ASML when pressed, citing intelligence sensitivity. ASML’s denial, by contrast, is built on documentation it has volunteered.

That same dependency on hidden infrastructure shows up elsewhere in modern technology. Silicon Canals has covered how a 65-year-old programming language called COBOL still runs over $3 trillion in daily banking transactions, and how a hobby kernel from a Finnish student now runs roughly 90% of the world’s cloud servers. The pattern is familiar: civilisation increasingly rests on small numbers of irreplaceable systems. ASML’s EUV monopoly is the most concentrated version of it.

For context on what investors are weighing: ASML and Applied Materials are the two key players in the semiconductor equipment market, serving different parts of the manufacturing process. Only one of them, though, has a tool that no competitor on Earth currently makes.

What happens next

Three timelines are now converging. The Bureau of Industry and Security will decide, on its own schedule, whether to act on whatever evidence Lutnick says exists. Congress will decide whether to pass the MATCH Act and force the Dutch government’s hand on DUV exports. And the team in Shenzhen will keep grinding through the optical metrology problem.

What Lutnick actually has on his desk remains the unanswered question. He told ASML’s leadership something had crossed a line. He has not told them what. ASML has produced a list of 340 locations and stands by it. Somewhere between those two positions is either a routing slip nobody at Veldhoven has seen, or nothing at all. Until the Bureau of Industry and Security speaks, that gap is the only thing holding the architecture of the global chip economy in place.