ASML Holding NV, the Dutch company that essentially holds the keys to advanced chipmaking, just watched its stock drop to levels not seen since June. The catalyst: a Chinese consortium reportedly began mass producing its own immersion deep ultraviolet lithography machines. For a company that has long enjoyed near-monopoly status in the most critical layer of semiconductor manufacturing, even a distant competitor turning on the lights is enough to spook investors.

The report, surfacing on July 27, points to a state-backed group involving Shanghai Yuliangsheng, SiCarrier, and Huawei as the entities behind China’s push to build homegrown DUV lithography systems. The machines are slated for delivery to some of China’s biggest chipmakers, including SMIC, Hua Hong Semiconductor, and ChangXin Memory Technologies.

## What China is actually building

The consortium is targeting roughly 5 machines delivered in 2026 and 20 in 2027. For context, ASML ships hundreds of lithography systems per year.

The new Chinese machines are immersion DUV systems, not the extreme ultraviolet (EUV) systems that ASML uses to manufacture the world’s most advanced chips. DUV is the previous generation of lithography technology. EUV remains firmly in ASML’s exclusive domain, and no Chinese company is remotely close to replicating it.

The Chinese-made systems lag behind ASML’s offerings in both performance and reliability. Extensive testing and validation will be required before these machines can produce chips competitively at any meaningful volume.

## The revenue question investors are actually asking

Sales to China are projected to account for around 20% of ASML’s revenue in 2026. That’s a significant chunk of business, and it’s under threat from two directions simultaneously. First, US legislative efforts like the MATCH Act are designed to further restrict DUV exports to China, potentially cutting ASML off from one of its largest customer bases. Second, if China can eventually build its own machines, even inferior ones, the demand for ASML’s products in the Chinese market could erode over time.

## Why this doesn’t change the game yet

Credible Chinese competition in advanced lithography is unlikely to materialize before 2030 at the earliest, due to technological and supply-chain disparities.

The five machines China plans to deliver in 2026 will go to domestic fabs for testing and integration, a process that typically takes months before any commercial chip production begins.

For ASML investors, the near-term risk remains regulatory — specifically whether the US and its allies further tighten export controls on DUV equipment. The MATCH Act and similar legislative proposals could directly reduce ASML’s addressable market well before Chinese competitors become a real factor.