What happened
US Commerce Secretary Howard Lutnick alleged an ASML extreme ultraviolet (EUV) lithography machine may be in China, a potential breach of export controls barring EUV sales to the region since the first Trump administration. US officials claim evidence of EUV-related components and transport equipment shipments, but have not presented it. ASML denies any EUV system exists in China, stating it tracks all machines and maintains an internal firewall for EUV technology access. ASML, Europe's most valuable public company with a market capitalisation trading in the neighborhood of $700 billion as of this week, expects 20% of its 2026 revenue from permitted older-generation tool sales to China.
Why it matters
Undermining US export controls on advanced chip technology creates significant compliance and supply chain risks for procurement teams and security architects. ASML's monopoly on EUV lithography, critical for cutting-edge processors powering AI, means any breach could accelerate China's indigenous advanced chip capabilities. This situation jeopardises ASML's permitted deep ultraviolet (DUV) sales to China, which represent 20% of its projected 2026 revenue, and follows Congress's recent codification of broader chip export controls. Teams must assess the integrity of their advanced semiconductor supply chains against evolving geopolitical constraints.
