Europe’s AI Chip Winners Take a Sharp Sentiment Hit

Soitec shares fell about 12.6% on Monday, the steepest decline in the Stoxx 600, as investors abruptly repriced Europe’s exposure to the artificial-intelligence buildout. ASML dropped roughly 5.2%, ASM International slid 8.7% and Infineon lost 7.6%, according to market reports.

The trigger was not a disappointing earnings report or a cancelled data-center project. It was a warning about speed. Anthropic Chief Executive Dario Amodei wrote on Saturday that the industry should slow the advance of frontier models while safety systems catch up. OpenAI CEO Sam Altman and Elon Musk, who runs xAI, publicly backed the concern, turning what might have been a policy debate into a trading signal.

That matters because Europe’s AI winners are mostly suppliers rather than model companies. ASML sells the advanced lithography machines required to manufacture leading-edge processors. ASM International supplies wafer-processing equipment. Infineon makes power and automotive semiconductors, while Soitec provides engineered wafers used in high-performance chips and optical interconnects.

Their investment case has rested on a simple chain: more capable models require more computing, more computing requires larger clusters, and larger clusters require years of spending on chips, memory, networking and manufacturing capacity. A slower development cycle does not erase that demand, but it can stretch the timetable, delay orders and make lofty valuations harder to defend.

ASML’s second-quarter net sales reached €9.3 billion, and the company’s stock had rallied as investors priced in sustained spending on AI accelerators and advanced chip capacity. That optimism left the shares vulnerable when the market began asking whether every planned gigawatt of data-center capacity would arrive on schedule.

The sell-off also landed against a less forgiving macro backdrop. Higher oil prices and rising bond yields make long-duration growth stocks more sensitive to changes in expected cash flows, amplifying a shock that might otherwise have stayed confined to AI laboratories. Reuters reported that Europe’s technology sector fell about 2.2% as the slowdown message spread across global markets.

Monday’s reversal does not prove that AI capital spending has peaked. It shows how much confidence in the next spending cycle was already embedded in European semiconductor valuations, and how quickly that confidence can unwind when the industry starts arguing about the brakes.