Shares of Soitec bounced +9.0% to €95.20 on Monday, clawing back ground after a sharp post-earnings selloff that had dragged the stock from €102.75 to €87.34 in four sessions. The rebound, riding a broader chip-sector rally, forces a pointed question: is the market right to look past a brutal top-line year and bet on a single fast-growing product line?
A Rough Year by the Numbers, Masked by One Bright Spot. Consolidated revenue came to €592 million in FY26, down 34% year-on-year.
Mobile communications, still Soitec's largest segment, plunged 41% due to a prolonged inventory correction among smartphone chipmakers.
Automotive and industrial revenue fell 44%.
Gross profit collapsed to €96 million, a margin of just 16.3%, versus 32.1% a year earlier and well below the 20.2% consensus. Investors who sold last week were reacting to a company that, on many traditional yardsticks, shrank dramatically.
The AI-Photonics Number That Changed the Conversation. Soitec's silicon-photonics business — which makes the specialized wafers used in high-speed optical links inside AI data centers — crossed $100 million in revenue in FY26, "earlier than initially anticipated."
Morgan Stanley estimated actual growth at 60–70%, implying roughly $130 million in sales.
The AI halo has already been enormous: Soitec's stock has surged roughly 270% this year, making it the best-performing stock in Bloomberg's European equity indexes.
Cash Flow Surprised, and That Bought Credibility. Free cash flow came in at €63 million — versus a consensus expectation of just €6 million — a gap wide enough to reassure investors that management can control spending during a downturn. Net debt fell to €56 million , and leverage stood at just 0.4× EBITDA , giving Soitec room to invest in photonics capacity without issuing new equity.
The Core Risk: One Growth Engine, Two Sinking Ones. The central uncertainty is whether photonics growth can fully offset persistent weakness in smartphones, which still account for over half of revenue.
If legacy demand stays weak, AI-photonics "may be offsetting damage rather than leading a full second wave of growth."
Soitec guided Q1 FY27 revenue up roughly 15% year-on-year , a sign of stabilization — but far from proof that the turnaround is durable. With 30-day volatility at 110%, nearly five times the Stoxx 600 , this stock remains a high-conviction, high-risk trade on AI infrastructure's next chapter.