UBS downgraded French semiconductor materials specialist Soitec to a "sell" rating from "neutral," while assigning a new price objective of €85. That target implies a roughly 38% decline from the stock's June 12 close of €137.35, according to the broker. The move follows an extended share-price rally and a reassessment of the company's revenue trajectory and margin outlook.
Although UBS increased its internal price target from €26 to €85 to reflect a revised earnings profile driven by what it describes as an accelerating Photonics-SOI opportunity, the firm said Soitec has outpaced reasonable valuation benchmarks. UBS noted the stock has jumped more than 400% year-to-date and is trading about 115% above its long-term average EV/Sales multiple.
By comparison, UBS said Soitec's listed peers Qorvo, Skyworks and Qualcomm have risen about 12% over the same period.
UBS modelled a strong ramp in Soitec's photonics sales, projecting photonics revenue to climb at a 36% compound annual growth rate between fiscal years 2026 and 2030, from roughly €94.8 million in FY26 to €323.5 million in FY30. Despite that acceleration, the broker cautioned the company's growth may lag the pace of its downstream foundry customers.
Specifically, UBS expects downstream foundries including TSMC, GlobalFoundries, STMicroelectronics and Tower Semiconductor to grow their silicon photonics revenues at an average rate of 81% in calendar year 2026, versus a projected 42% growth rate for Soitec over the same period. "We believe the market may overestimate the degree to which Soitec’s growth should track its customers," the analysts wrote, adding that average selling prices for silicon photonics wafers at Soitec are "likely flat to declining with scale."
UBS also flagged the relative contribution of photonics to Soitec's overall business. The broker forecast photonics would represent about 16% of total revenue in FY26 and grow to roughly 25% by FY28, which UBS said may not be sufficient to offset weakness in Soitec's larger RF-SOI segment. UBS estimates RF-SOI accounts for 25-35% of the company's sales.
On the top-line outlook, UBS projected total revenue of €682.7 million in FY27, increasing to €840.6 million in FY28 and €1.02 billion in FY29. That trajectory corresponds to an 18% compound annual growth rate over FY26-30 in UBS's model. The broker noted that consensus market expectations imply more than 25% revenue growth, and that current market valuations appear to price in significantly higher margins than UBS expects.
UBS contrasted its margin assumptions with those embedded in market prices, saying that valuations seem to assume EBITDA margins of roughly 34% by 2029. In contrast, UBS's estimates place sustainable EBITDA margins in the 21-23% range.
Reflecting inventory destocking and continued elevated idle costs, UBS materially reduced its fiscal 2027 gross margin forecast for Soitec to 19.4% from 30%. The broker attributed the lower margin outlook to ongoing destocking that keeps fixed and idle costs high even as revenue is expected to recover.
On earnings per share, UBS forecast a diluted EPS loss of €0.11 in FY27, followed by a recovery to €2.00 in FY28 and €5.34 in FY29.
UBS described its discounted cash flow valuation assumptions as a weighted average cost of capital of 9%, a terminal growth rate of 2% and a terminal multiple of 14.5x. Under those inputs the broker arrived at a total enterprise value of €2.70 billion and a gross equity value of €2.79 billion, based on 36 million shares outstanding.
The analysts also pointed to a set of structural headwinds that have been disclosed by the company. These include shrinking smartphone module content, the expiration of GlobalWafers' SmartCut licensing agreement and a weaker outlook for silicon carbide demand. UBS presented these as additional constraints on Soitec's medium-term recovery and margin profile.
Methodology note - UBS' analysis and forecasts referenced here summarize the broker's internal modelling and public statements as provided.