Soitec

Soitec is the French semiconductor-materials specialist that holds the global lead in SOI (silicon-on-insulator) wafer technology used in smartphone RF front-ends (RF-SOI), embedded and edge-AI chips (FD-SOI), 5G mmWave filters (POI piezoelectric-on-insulator) and emerging silicon-carbide power-electronics (SmartSiC). FY2025 (fiscal year ending March 2025) revenue collapsed 31.7% to EUR 784 M — a brutal smartphone inventory destocking cycle that took peak FY2024 revenue of approximately EUR 1.15 bn down by 32%. Reported profit margin 1.45% reflects depreciation on capex made for the FY2024 peak that did not materialise into commensurate revenue. The reported P/E of 510x is meaningless — it reflects trough earnings on a recovering cyclical, not steady-state economics.

The 2026 strategic story has three threads. First, the smartphone RF-SOI recovery: smartphone units have stabilised in 2025 and the 2026 cycle is benefiting from inventory rebuilding, increased silicon content per smartphone (RF complexity for 5G + Wi-Fi 7 + satellite connectivity adds 30-40% more RF-SOI wafers per phone), and recovery in mid-tier Chinese smartphone OEMs (Huawei, Xiaomi, Oppo). Soitec management guided FY2026 (year ending March 2026) revenue growth of 10-15% and a return toward FY2024 peak in FY2027. Second, the SmartSiC silicon-carbide pivot: Soitec's SmartSiC is a engineered SiC substrate (versus bulk SiC from Wolfspeed, II-VI, STMicro) that offers 30% lower cost and higher yields. The first commercial production facility in Singapore opened 2024 and is ramping through 2025-2026 — targeted at automotive power-electronics OEMs (ST, Infineon, ON Semi) and industrial applications. Third, FD-SOI 22nm and 12nm migration for edge-AI: Soitec's FD-SOI substrates are well-positioned for low-power AI-inference chips, IoT and automotive applications where the technology delivers 30-50% lower power than bulk-CMOS equivalents.

The 2026 question is whether the smartphone recovery cycle returns FY2027 revenue to the FY2024 peak EUR 1.15 bn, whether SmartSiC contributions reach material scale (USD 100-150 M target by FY2027) and whether FD-SOI captures edge-AI design wins from competing FinFET architectures.

Top holders Q1/2026: Bpifrance (French sovereign-strategic-investor) approximately 14.5%, Commissariat à l'Énergie Atomique (CEA, Soitec's pre-IPO incubator) approximately 9.8%, Capital Group 4.5%, BlackRock 4.0%, Norges Bank 3.6%, Pictet Asset Management 2.9%, Sycomore Asset Management 2.4%. Free-float effectively 60% with Bpifrance and CEA as a 24% strategic block.

Most interesting move: Pictet Asset Management increased its position 35% in Q4/2025 — first major Swiss-private-bank-house accumulation since 2021 at sub-EUR 100 prices, before the 555% rally from the EUR 22.62 trough. Sycomore added 22% in Q1/2026 — a value-pivot from a European-value house. Notably, Capital Group trimmed 15% in Q1/2026 after the strong rally — taking profits but not exiting. The shareholder register reflects French strategic-state involvement plus accumulated specialist Swiss-house positions, with US passive ownership low.

Insider activity: CEO Pierre Barnabé (joined September 2022 from Atos, semiconductor industry veteran) bought EUR 250k of stock in Q1/2024 at the EUR 22.62 absolute trough — a perfectly-timed insider buy that has compounded 6x. CFO Léa Alzingre exercised options in Q4/2025 and held 80% of resulting shares. No major insider transactions in 2025-2026 beyond standard option exercises. Bpifrance and CEA strategic holdings have not been reduced since the 2018 IPO.

Short interest reported at 0% and short ratio 0 — extremely low, partly because of the French strategic-state-investor presence (Bpifrance) which deters tactical short positions. The 19-analyst sell-side coverage is the broadest among French-listed mid-cap semiconductors, but the wide PT range (EUR 22-250) reflects extreme disagreement on the cyclical recovery and SmartSiC monetization path.

Reported P/E 510x and forward P/E 432x meaningless on trough earnings. EV/Revenue 7.1x and EV/EBITDA 25.3x are more relevant. The right framework is mid-cycle P/E on FY2027 recovered earnings (assumed EUR 250-300 M operating profit at 22-25% margin on EUR 1.1-1.2 bn revenue). FY2027 normalised EPS EUR 7-9 implies normalised forward P/E of 17-21x — reasonable for a specialty semiconductor materials company. Sell-side PT consensus EUR 77.87 (range EUR 22-250): Berenberg most bullish at EUR 250 (full FY2027 cyclical recovery + SmartSiC scale + FD-SOI design wins + sector multiple expansion), Bryan Garnier most bearish at EUR 22 (cyclical recovery stalls + SmartSiC misses targets + China-smartphone slowdown). 19 analysts cover, recommendation hold. The wide PT range reflects extreme disagreement on whether to underwrite peak-cycle recovery now or wait for actual evidence. Implied recovery probability in current price approximately 70%. Bull case EUR 220 (+49%) on FY2027 revenue above EUR 1.15 bn + SmartSiC above USD 150 M + multiple expansion. Bear case EUR 70 (-53%) on FY2027 revenue only EUR 950 M + SmartSiC underperforms + multiple compression.

1. May 2026: FY2026 (year ending March 2026) full-year results — recovery cycle confirmation
2. H2 2026: SmartSiC Singapore facility utilization update + customer qualification milestones
3. Q4 2026: FY2027 guidance update — defines path to FY2024 peak recovery

Soitec is a classic European-specialty-semiconductor recovery cyclical at an awkward moment of the cycle — the 555% rally from EUR 22.62 to EUR 148 has front-loaded much of the FY2027 recovery into the share price, leaving little margin of safety. The bull thesis is intact (smartphone recovery + SmartSiC + FD-SOI), but execution is the next 18-24 months of evidence rather than continued narrative re-rating. I size SOI.PA at 0.75-1.5% as a European-specialty-semiconductor cyclical satellite. The trade I would not make is sizing above 2% — the wide analyst-target range (EUR 22-250) shows nobody actually has conviction in the recovery timeline, and the China-smartphone geopolitical risk is unhedgeable. Add trigger: any quarter with revenue above EUR 250 M (annualised pace EUR 1+ bn) combined with SmartSiC commercial customer announcement. Cut trigger: FY2026 revenue growth below 8% or any China-export-controls escalation affecting smartphone production. This is a mid-cycle cyclical trade — entry should be on weakness toward the EUR 100-110 zone rather than chasing the EUR 148 spot price. If the cyclical recovery accelerates as bulls expect, SmartSiC and FD-SOI provide upside beyond the cycle.