According to sources, U.S. officials have expressed concerns that one of ASML's advanced chip-making tools might be in China, despite strict export controls. This would be a major breach for the Dutch company, which holds a monopoly on EUV lithography, critical for cutting-edge processors.

ASML CEO Christophe Fouquet insists the firm tracks every machine it ships and maintains tight security to prevent reverse-engineering of its technology. But if even one EUV tool landed in Chinese hands, it could signal a significant loss for U.S. export regulations aimed at keeping advanced AI tech out of military and industrial use.

The company's monopoly has made ASML Europe’s most valuable public firm, with immense revenue expected from China despite current bans. However, the government is investing in startups like xLight as potential rivals to ASML's dominance, adding complexity to this tech war.

Meanwhile, a bipartisan bill in Congress calls for an even harsher ban on DUV shipments to China, further complicating ASML’s future. As AI and chip technology continue to transform the world, the battle over EUV tools could have wide-reaching consequences.