Soitec SA (SOI.PA): analysis and signal as of September 2, 2026

Published on September 3, 2026 at 08:13 · Updated on September 3, 2026 at 23:09 · by Aurélien Ambert, QDNA

Exchange : Euronext Paris · Sector : Semiconductors SOI / Electronic Technology

In short

The signal is weak on Soitec SA as of 02/09/2026, with a vote of 3/3 and a deterministic momentum-volatility score of -1.00. The main reason lies in the excessive volatility of the stock, penalized by the cm-taleb rule, which outweighs a technical structure that remains intact above the moving averages.

Current signal: weak (vote 3/3)
Deterministic score: -1.0 → signal expected by the scale : weak (September 10, 2026)
Layers: fundamentals : neutral, price : positive, risks : neutral

Triggered rules

Rule	Weight
penalizes excessive volatility (ruin risk), survival comes first, irreversible loss outweighs the optimization of return	-1.5
moderately favors a positive 12-1 month momentum (tailwind), BUT guardrail: costly rotation, long-term reversal, momentum crashes, a conviction signal, not a rotation trigger	+0.5

Thesis

Soitec retains its worldwide leadership in SOI substrates, a segment with a quasi-monopolistic character, with exposure to artificial intelligence through FD-SOI 18 nm and POI intended for RF filters, two technologies attached to the semis and AI category favored by the macro table. The technical layer remains bullish above the moving averages, but the fundamental layer stays silent on the recent figures and the deterministic momentum-volatility score stands at -1.00. The result is a weak signal, dragged down by the volatility penalty. The correlation of 0.39 with ASML also reflects a marked sensitivity to the semiconductor sector.

Bull case

Soitec holds a position as global leader in SOI substrates, in a quasi-monopolistic segment. Exposure to artificial intelligence and 5G through FD-SOI and POI places the stock in the semis and AI category favored by the macro table. The technical structure is intact, with a price of 110.55 EUR as of 01/09/2026, that is 39.1 % above the 200-session moving average. The intraday component has turned positive again over six months, at +25.8 %, a signature of confirmed institutional participation. The catalyst agenda is dense, with AVGO on 02/09/2026, the CLARITY vote on 15/09 and the TSM detachment on 16/09.

Bear case

Capital intensity is high, with the Capex spending on the Belvédère site in 300 mm, and the stock depends on a volatile semiconductor cycle. The deterministic score stands at -1.00, dominated by the cm-taleb rule of excessive volatility assessed at -1.5. No recent verified accounting data is available in the session. The hybrid profile pulls the stock toward the export and automotive zone, penalized by the macro table. The geopolitical risk persists on exports of advanced substrates to China. Finally, a beta of 1.32 and a correlation of 0.39 with ASML increase sensitivity to sector jolts.

Scenarios

The bullish scenario, with a 25 % probability, assumes a ramp-up of FD-SOI 18 nm confirmed by the T2 FY27 results, the iPhone 18 mmWave catalyst, an accommodative BCE on 10/09 and the continued rise of AI semiconductors. The central scenario, at 50 %, describes a consolidation after the late extension above the MM200, with declining volumes and caution ahead of the accounting publication. The bearish scenario, at 25 %, considers a relapse linked to semiconductor cycle tensions, the activation of export sanctions between the United States and China and a deterioration of the FD-SOI margin.

Risks

The main risks lie in the capital intensity of the Belvédère site in 300 mm and the dependence on the semiconductor cycle. The cm-taleb rule penalizes the excessive volatility and weighs on the score. The absence of recent verified accounting data leaves the fundamental layer silent until the publication of T2 FY27, expected around the end of October 2026. The geopolitical risk concerns exports of advanced substrates to China. On the technical side, a clear break of the moving averages, including the MM200, would invalidate the bullish structure described. The reading would only become more solid with a weighted deterministic score moving back above +1.0 and verified fundamental figures.

Upcoming catalysts

Date	Description
October 15, 2026	Q2 revenue fiscal 2026/27

Signal history (last 12 months)

Date	Signal	New fact
September 2, 2026	weak (3/3)	No new dated fact between 31/08/2026 and 02/09/2026. The price of 110.55 EUR from 01/09/2026 and the technical structure above the MM200 and MM50 were already integrated into the previous analysis. The AVGO catalyst of 02/09/2026 is not yet digested and the T2 FY27 accounting publication is not expected before the end of October 2026. The weighted deterministic score remains at +0.50 and the momentum-volatility score remains at -1.00, an unresolved divergence which justifies the renewal of the verdict.
August 31, 2026	weak (single draw, outside the three-draw protocol)	unchanged
August 30, 2026	weak (single draw, outside the three-draw protocol)	unchanged

Frequently asked questions

What is the verdict for Soitec SA as of 02/09/2026?

The signal is weak, with a vote of 3/3 and a deterministic momentum-volatility score of -1.00. The technical structure remains bullish above the moving averages, but the volatility penalty, carried by the cm-taleb rule, dominates the assessment. The fundamental layer remains silent, for lack of recent verified accounting data.

Why is the deterministic score negative despite a bullish technical structure?

The momentum-volatility score stands at -1.00, dominated by the cm-taleb rule which penalizes excessive volatility at -1.5. The price of 110.55 EUR as of 01/09/2026, at 39.1 % above the MM200, supports the technical reading, but this parameter does not offset the volatility-related penalty. The two layers therefore diverge.

Which catalysts can move the situation?

The calendar is dense: AVGO on 02/09/2026, the CLARITY vote on 15/09, the TSM detachment on 16/09 and an accommodative BCE on 10/09. The accounting publication of T2 FY27 is expected around the end of October 2026. These events can clarify the trajectory of FD-SOI 18 nm and that of RF filters in POI.

What are the main risks identified?

The risks concern the capital intensity of the Belvédère project in 300 mm, the dependence on the semiconductor cycle and the geopolitical tensions over exports of advanced substrates to China. The correlation of 0.39 with ASML and the beta of 1.32 increase sensitivity to the sector. The hybrid profile also pulls toward the export and automotive zone, penalized by the macro table.

How is Soitec exposed to artificial intelligence?

The company derives its exposure from the FD-SOI process in 18 nm and from POI intended for RF filters, two technologies oriented toward AI and 5G. This orientation places the stock in the semis and AI category favored by the macro table. The bullish scenario, with a 25 % probability, moreover assumes the ramp-up of FD-SOI 18 nm confirmed by the T2 FY27 results.

Sources

The official filings below are the issuer's own, matched to this stock by its identifier (LEI, CIK or ISIN). The figures quoted above come from an automated arbitration: they have not been re-checked one by one.

September 7, 2026 — SOITEC - INFORMATION RELATING TO THE TOTAL NUMBER OF VOTING RIGHTS AND SHARES FORMING THE SHARE CAPITAL (AMF · Informations réglementées continues)
September 7, 2026 — SOITEC - INFORMATION RELATIVE AU NOMBRE TOTAL DE DROITS DE VOTE ET D’ACTIONS COMPOSANT LE CAPITAL SOCIAL (AMF · Informations réglementées continues)
September 2, 2026 — Point sur l’activité de Soitec (AMF · Informations réglementées continues)
September 2, 2026 — Soitec Trading Update (AMF · Informations réglementées continues)
August 25, 2026 — Franchissement de seuil (AMF · Informations réglementées continues)

Automated AI analysis: limitations and transparency

This content is an automated analysis produced using artificial intelligence. Personal analysis for information purposes — no personalised investment advice. MMR content consists of general research. It does not take account of your financial circumstances, objectives or risk tolerance. Data, analyses and results, including those produced using artificial intelligence, may contain errors, be incomplete or become outdated. No return or outcome is guaranteed. All investments carry a risk of partial or total loss of capital. Past performance and simulations do not predict future results. Before making any decision, check information against original sources and, where necessary, consult an authorised professional. You remain responsible for your investment decisions. This notice does not exclude or limit any liability that cannot legally be excluded or limited.
Tool and analysis: QDNA, Aurélien Ambert.
Analysis (arbitration) completed on September 2, 2026; this page was completed on September 3, 2026 at 23:09 (UTC).
Interests: no position in the stock analysed (SOI.PA) is recorded in the data consulted on September 12, 2026 (UTC). This does not confirm the absence of holdings or other interests. The situation at the analysis publication date has not been reconstructed.
This declaration covers only recorded positions in this stock; it is not an exhaustive verification of other interests or remuneration.
Methodology: analysis chain, score formula and scale described on the public methodology page.
Analysis horizon: 2035.