AT&S shares up 450%: Can Europe's deeptech startups find their niche?

For European deep-tech founders, AT&S is a case study in patient pivot. The company spent decades in printed circuit boards before switching to IC substrates, a move that turned a small Austrian mountain town into a key node in the AI supply chain. The lesson is that Europe can win in AI infrastructure without producing leading chips, if startups and scale-ups target defensible technical bottlenecks.

The Austrian mountain town of Leoben has become an unlikely focal point in the global artificial intelligence infrastructure buildout, and its anchor company, AT&S, has turned that position into a dramatic equity story. Shares of the Austrian electronics group have surged more than 450 percent in 2026, according to reporting published August 23, making AT&S one of Europe's most striking beneficiaries of the AI boom. The company manufactures integrated circuit substrates, the boards that physically and electrically connect advanced chips to memory and power supplies, a component that has become quietly indispensable as AI systems demand faster data movement, higher power delivery and denser packaging.

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Malcolm Penn, chairman of semiconductor consultancy Future Horizons, added a more measured caveat: AT&S is riding the AI boom, not driving the wave.

AT&S was founded in 1987 as a printed-circuit-board maker and did not enter the IC substrate business until 2016, when serial production began in Chongqing, China. A second substrate factory opened in Malaysia in 2024. In parallel, the company reinforced its home base: after investing more than 500 million euros, roughly $576 million, in a research and production centre opened last year in Leoben, it became Europe's only major commercial manufacturer of advanced IC substrates. The Hinterberg site serves as global headquarters and houses the group's research and development operations.

Chief executive Michael Mertin presented the development as evidence that Europe can still occupy important niches in the AI race, even if it cannot compete with US rivals on chip innovation or with Asian firms on production scale. He said Europe will not be the leading nation or region in all areas, but it has outstanding technologies where it is a world leader. Malcolm Penn, chairman of semiconductor consultancy Future Horizons, added a more measured caveat: AT&S is riding the AI boom, not driving the wave.

The surge reflects a broader shift in AI hardware supply chains. Advanced substrates are an essential part of chip packaging, signal routing and power integrity. Although names associated with GPUs, accelerators and leading-edge foundries attract most attention, less-visible components increasingly determine system performance and reliability. AT&S's scarcity value is reinforced by its status as Europe's sole major advanced substrate producer at a time when European policymakers are anxious about semiconductor sovereignty and reducing dependency on Asian supply chains.