US Legislation Poses Direct Threat to ASML's Chinese Operations

Proposed US law targets ASML's DUV lithography sales and service in China, its largest market, risking significant revenue and high-margin service contracts.

A proposed piece of U.S. legislation has moved from a theoretical concern to a concrete risk for ASML. The MATCH Act, introduced in the U.S. House of Representatives on April 2, 2026, explicitly names the Dutch semiconductor equipment manufacturer. Its primary aim is to halt the company's remaining deep ultraviolet (DUV) lithography business with China, a segment that has operated outside existing restrictions on extreme ultraviolet (EUV) exports.

Financial Stakes and Market Exposure

The significance of this legislative threat is underscored by China's role in ASML's revenue stream. In 2025, China stood as the firm's single largest market, accounting for 33% of total sales. Current projections for 2026 already anticipate a decline to approximately 20%, but the enactment of the MATCH Act would sharply accelerate this contraction.

Beyond future sales, the proposal targets a critical and profitable part of ASML's existing business. The draft law seeks to prohibit not only new sales to major Chinese chipmakers—including SMIC, Hua Hong, Huawei, CXMT, and YMTC—but also the maintenance of machines already installed. This represents a key escalation from prior restrictions. DUV systems require specialized servicing that essentially only ASML can provide. A maintenance ban would therefore erode the ongoing, high-margin service revenue generated from the substantial installed base of tools within China.

Enforcement Mechanisms and Allied Pressure

The draft legislation incorporates a robust enforcement framework. Allied nations, specifically the Netherlands and Japan, are given a 150-day window to demonstrate their own progress in implementing similar controls. Should they fail to do so, the U.S. Department of Commerce is empowered to unilaterally extend its restrictions. This authority is rooted in the Foreign Direct Product Rule, which allows the U.S. to regulate goods produced abroad if they incorporate a certain percentage of U.S. technology. Both the Dutch foreign ministry and ASML have declined to comment publicly on the proposed act.

Upcoming Events to Gauge Impact

For investors, the timing introduces a period of heightened scrutiny. ASML is scheduled to release its Q1 2026 financial results on April 15, followed by its Annual General Meeting on April 22. A dividend payment of €2.70 per share is set for April 24.

CEO Christophe Fouquet has provided full-year guidance forecasting revenue between €34 billion and €39 billion, with a gross margin projected in the range of 51% to 53%. The company entered the year with a strong order backlog of €38.8 billion as of the end of 2025, indicating underlying demand remains healthy. The earnings call on April 15 will serve as the first major platform where management is compelled to address the MATCH Act directly. Market participants will listen closely for Fouquet's commentary on the evolving China revenue segment and any potential contractual risks emerging from the legislative landscape.