Who Supplies ASML? The Hidden Companies Behind the World's Most Important Machine

ASML is the only company on earth that can build an EUV lithography machine, but it doesn't build one alone. Its most advanced systems run on optics from Carl Zeiss, lasers from TRUMPF, and parts from thousands of suppliers. Here's who supplies ASML, and why that makes it the single most concentrated chokepoint in tech.

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Jul 9, 2026 · 5 min read

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Every leading-edge chip in the world is printed by a machine that only one company knows how to build. That includes the chips in NVIDIA's AI accelerators, in Apple's phones and in every advanced data center. The company is ASML, and its extreme-ultraviolet (EUV) lithography systems are the most important tools in modern manufacturing. In who supplies TSMC we followed the chain up to ASML and stopped there, because there is no second source.

But ASML is a customer too. It doesn't mine its own glass, grow its own crystals or build its own lasers. If you want to know where the real chokepoint in the chip industry sits, you have to look at who supplies ASML, because a few of those suppliers are as hard to replace as ASML itself.

The short answer

ASML mostly doesn't make the parts inside an EUV machine. The suppliers that matter fall into three groups.

• Optics. Carl Zeiss SMT builds the mirrors and optical systems that steer and focus the EUV light. ASML has no in-house alternative, and it owns a minority stake in Zeiss SMT to lock the relationship in.
• Light source. The EUV light comes from blasting molten tin droplets with a high-power laser. TRUMPF supplies the laser, and ASML's own subsidiary Cymer integrates the source.
• Mechatronics and components. Thousands of precision suppliers build the frames, stages and electronics that hold everything to nanometer tolerances. Many of them are Dutch, such as , and .

The long tail: thousands of suppliers, one machine

ASML has said that one EUV system contains well over 100,000 parts and draws on thousands of suppliers. Much of that network sits in and around the Netherlands. Mechatronics firms and contract manufacturers such as VDL Groep, Neways Electronics and Prodrive Technologies build cabinets, wafer stages and electronics to tolerances most industries never deal with.

The newest generation, High-NA EUV (the EXE platform), goes further still. Each system reportedly costs north of $350 million, against roughly $150 to 200 million for a standard EUV machine, and it needs even larger and more unusual Zeiss optics. Each step up in capability makes ASML more dependent on the same short list of suppliers.

Where the real chokepoint is

Put it together and the picture is stark. The AI boom depends on NVIDIA. NVIDIA depends on TSMC. TSMC depends on ASML. And ASML depends on Carl Zeiss and TRUMPF, two German companies nobody else can replace. A chain of maybe four or five companies holds up nearly all advanced computing in the world.

We keep finding this pattern of narrow connections, and here it is at its deepest. A handful of equipment makers sell to a handful of chipmakers, and those equipment makers rely on an even smaller group of optics and laser specialists. You could sketch the whole thing on a napkin.

See it for yourself

A supply chain is really a map of risk. Once you know that ASML's machines depend on Zeiss's mirrors and TRUMPF's lasers, you can see where the deepest chokepoint in tech sits: one layer below the companies that make the headlines.