Bernstein Maintains Outperform Rating on Soitec, Focuses on Sustainability of Photonics Rebound

Overview

This research report is Bernstein's pre-earnings commentary on French semiconductor materials company Soitec (SOI.FP) ahead of its FY26 earnings release. The report notes that Soitec will release its earnings after market close on May 27, with its stock price up over 600% YTD due to market enthusiasm for photonics and AI data center themes. The institution maintains an 'Outperform' rating and a target price of 150 euros, with the core logic being that the long-term high-growth potential of its photonics business (estimated 41% CAGR) far exceeds conservative market expectations, but short-term observation is needed to see if management can provide sufficient fundamental support to match the current high valuation.

Core views

Earnings Guidance and Short-Term Outlook: Soitec previously suspended its medium-to-long-term guidance, retaining only quarterly revenue guidance. The company guides for Q4 revenue to grow ~20% QoQ on a comparable basis, implying revenue of ~192 million euros, which aligns with Bernstein and Vara consensus. For the upcoming Q1 FY27, Bernstein's model forecasts revenue of 101.4 million euros, down 47% QoQ but still up 16% YoY (compared to the low base of Q1 FY26). Expectation Gap in Photonics Business: Against the backdrop of significant stock price rebound, investors expect management to provide more positive growth arguments. Currently, the company's guidance for photonics revenue CAGR is conservative at only 25-30%. However, Bernstein's recent in-depth report analysis suggests that, benefiting from AI data center cluster demand, Soitec's photonics business could achieve a 41% CAGR from 2025-2030. If management can raise this guidance, it would be a key catalyst for the stock price. Improvement Signals in Other Business Lines: Beyond photonics, the report also highlights two other potential positive factors: normalization of automotive business revenue recovery and whether inventory pressure in the foundry customer channel for RF-SOI (Radio Frequency Silicon-on-Insulator) has truly ended. Previously, Soitec experienced ~50% under-shipment in this channel; alleviation of this situation would aid revenue recovery.

Analysis framework

Bernstein employs a combination of segment business analysis and valuation modeling. First, by breaking down Soitec's three main business segments (Mobile Communications, Automotive & Industrial, Edge and Cloud AI), it assesses their short-term performance and long-term drivers. Second, for the market's most focused 'photonics' theme, the institution does not simply follow the company's conservative guidance but independently estimates a higher long-term CAGR (41% vs. company guidance of 25-30%) based on macro trends in AI data center infrastructure construction, uncovering expectation gaps. Finally, intrinsic value is determined via a DCF model, supplemented by relative valuation methods (comparing EV/Sales and EV/EBITDA multiples with peers) to validate the current stock price's margin of safety.

Methodology notes

• Valuation methodsDCF Discounted Cash Flow

  DCF Discounted Cash Flow Model

  The institution uses a weighted average cost of capital (WACC) of 9.3%, terminal growth rate of 3%, and long-term EBITDA margin of 35.3% as core assumptions to calculate Soitec's intrinsic value, arriving at a target price of 150 euros. This is a classic method for evaluating the long-term value of growth-oriented tech companies.

• Industry/Industrial Analysis FrameworkVolume-Price Breakdown

  Business Segment Volume-Price and Growth Rate Breakdown

  The report splits company revenue into three verticals—Mobile Communications, Automotive & Industrial, Edge and Cloud AI—analyzing their YoY/QoQ changes and long-term CAGR to identify true growth engines (e.g., photonics/AI) and drag factors (e.g., traditional mobile communications).

• Event Game Theory and Behavioral FinanceExpectation Gap/Expectation Management

  Guidance vs. Market Expectation Game

  The report emphasizes the significant expectation gap between the company's conservative photonics growth guidance (25-30%) and the institution's higher estimate (41%). With the stock price already rebounded sharply, a key focus of the earnings call is whether management will signal more optimism to 'manage' and elevate market expectations.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• Soitec (SOI.FP)

  Direct beneficiary, core supplier of photonics substrates

  Strengths

  Technologically领先 in photonics-SOI field, directly benefiting from AI data center cluster construction; institution predicts its photonics business long-term growth rate as high as 41%.

  Weaknesses

  Current valuation extremely high (YTD increase >600%), demanding on expectations; traditional mobile communications business still占比高 and facing downward pressure.

  Comparison

  Compared to peers, it has higher purity in the photonics细分赛道, but short-term financial volatility is greater.

  Risks

  Technology adoption slower than expected; high customer concentration;低迷 in smartphone and automotive markets.

Key data

• Q4 FY26 Revenue Guidance~192 million euros~20% QoQ growth on comparable basis
• Q1 FY27 Revenue Forecast101.4 million euros-47% QoQ, +16% YoY
• Photonics Business Long-Term CAGR Forecast41%Institution estimate (2025-2030e), above company guidance of 25-30%
• Target Price150.00 EURBased on DCF model
• YTD Stock Price Increase>600%Reflecting heightened market sentiment on photonics/AI themes

Impact & implications

For Soitec, this earnings release is not just a disclosure of performance but also a stress test of the credibility of its 'photonics story.' If management can confirm strong AI-driven photonics demand and raise long-term growth guidance, it would help digest the current extremely high valuation multiples; conversely, if only conservative guidance is maintained, given the stock price has already priced in much optimism, a pullback risk may emerge. For the industry, Soitec's progress in RF-SOI channel inventory digestion is also an important micro indicator for observing semiconductor downstream demand recovery.

Risks

• Soitec's technology adoption in existing or target markets (especially FD-SOI, POI, and photonics-SOI) is slower than expected
• High dependence on smartphone (54% of sales), cloud/edge AI (36%), and automotive/industrial (10%) end markets; any market slowdown or inventory adjustment would impact performance
• High customer concentration, with top five customers (STM, GFS, UMC, Tower Semi, TSMC) accounting for 61% of sales; customer technology roadmap missteps could lead to share loss

What to watch

• Whether management raises long-term photonics revenue CAGR guidance (currently 25-30%)
• Whether automotive business revenue normalizes and recovers
• Whether the ~50% under-shipment situation in the RF-SOI channel ends, i.e., whether inventory digestion is complete