Soitec’s share price has climbed almost sevenfold this year, from roughly €23 in January to €154 on Monday afternoon in Paris. The surge comes despite a troubling headline: the French semiconductor company’s annual revenue collapsed 34% last year, falling to €592 million. Investors, though, are betting that artificial intelligence infrastructure spending will drive demand for Soitec’s specialised silicon wafers for years to come.
Bank of America upgraded Soitec from Neutral to Buy on Friday, lifting its price target from €152 to €300, which implies more than 90% additional upside. The move reflects a broader technology narrative: AI adoption could fuel demand for faster, more energy-efficient chip connections. But it also raises uncomfortable questions about valuation risk, dependence on a single technology and whether European semiconductor firms can maintain global leadership against intense competition.
A European Champion Built on Innovation
Soitec, based in Bernin near Grenoble, emerged from French research institute CEA-Leti 34 years ago. Today, the company employs more than 2,000 people and holds more than 4,700 patents. It doesn’t make the processors used to train AI models. Instead, it manufactures engineered silicon wafers, the foundational material other semiconductor companies use to build chips.
In its clean rooms, workers move silicon wafers through dozens of manufacturing stages, manipulating very thin layers of material. “Our job is to run faster than the competition,” Chief Technology Officer Christophe Maleville told Euronews when journalist Valérie Gauriat visited production facilities earlier this month for the Made in Europe series. That speed matters. Soitec supplies specialised silicon wafers used to make silicon photonics chips, which use light rather than electrical signals to connect processors. They offer a faster, more energy-efficient alternative to traditional copper connections.
Bank of America analyst Oliver Wong and his colleagues estimate Soitec currently holds approximately 95% of the market for photonics-SOI wafers. Competitors, including Taiwan’s GlobalWafers, are trying to enter. The bank expects Soitec’s technological expertise and decades of manufacturing experience to protect its position, and estimates the wafer area needed for photonic chips will expand by approximately 60% annually between 2026 and 2030.
The Bet on Photonics and AI Infrastructure
In September, Soitec projected that photonics revenue in the financial year ending March 2027 would reach between 2.5 and three times the previous year’s level. The company also forecast approximately 50% growth in total revenue for the September quarter. It expects multi-year capacity agreements with eight of its roughly ten largest photonics customers. Those deals could make future demand more predictable and support investment in production capacity.
The shift is striking. The smartphone industry accounted for roughly half of Soitec’s revenue in the last fiscal year. In the June quarter, its broader Edge & Cloud AI division generated 57% of sales. Bank of America projects photonics revenue will rise from €92 million in fiscal 2026 to approximately €680 million in fiscal 2029—almost half of projected group revenue of €1.43 billion, up from just 16% last fiscal year.
Margins help explain the appeal. Bank of America estimates photonics wafers retain about 80 cents per euro of sales after raw material costs, compared with 56 cents for Soitec’s other products. The bank expects the company’s gross profit margin to rise from 16% to 44% by fiscal 2029. “We believe FY26 gross margin of 16% marked the trough for Soitec,” Wong and his colleagues wrote.
The Vulnerability Beneath the Surge
Yet the stock’s valuation raises red flags. At approximately €154 per share, Soitec trades at nearly 96 times Bank of America’s projected earnings for the financial year ending March 2027. Investors could be exposed if AI infrastructure spending slows or competing technologies gain ground.
Soitec’s near-term outlook carries risks, too. Annual revenue fell 34% to €592 million in fiscal 2026. Mobile communications sales plunged 43%, and the smartphone division contracted another 10% in the June quarter as customers reduced inventories. Bank of America expects the mobile business to hit its lowest point this fiscal year, but a recovery isn’t guaranteed.
The company’s expansion plans signal confidence in photonics growth. Bank of America expects Soitec to announce an extension of its Singapore manufacturing plant in the coming months, potentially costing around €700 million. That investment assumes the AI infrastructure boom will sustain demand for years.
Soitec is scheduled to publish first-half results on 18 November.
Why This Matters:
Soitec’s surge reflects a real shift in semiconductor demand, driven by AI infrastructure investment that could reshape European tech leadership for years to come. But it also exposes a structural challenge for European firms: competing at the cutting edge of global technology requires sustained capital investment, innovation and manufacturing expertise. When one European company holds 95% of a critical market segment, the bet on continued dominance is enormous. If that dominance slips, or AI infrastructure spending disappoints, the consequences could ripple through employment—Soitec has 2,000 workers—regional innovation ecosystems centred on Grenoble, and Europe’s ability to retain high-value semiconductor manufacturing. The company’s planned €700 million Singapore expansion also raises questions about where European semiconductor capacity will be anchored in coming decades, a strategic concern that extends beyond any single company’s stock price.