Soitec (Euronext Paris: SOI) closed up 11.6% at €137.30 in Tuesday's Paris session — Saxo's morning wrap logged the move at +13.4% — after JPMorgan moved the French wafer maker from Neutral to Overweight and doubled its price target from €98 to €200.

An upgrade on its own doesn't do that. The revisions underneath it do. Analyst Craig McDowell raised his FY28 revenue forecast by nearly 32% to €1.057bn and took adjusted EPS to €6.63 from €1.42 — that's a 4.7x change to the earnings line, not a nudge.

The whole case is one segment

Silicon photonics. McDowell sees Photonics-SOI revenue clearing €1bn by fiscal 2030, hitting a ~€450m run rate by the end of FY27, at a contribution margin above 75%. And it's not purely a model: Soitec has signed Capacity Reservation Agreements with photonics customers that lock in committed volumes with floating pricing. Management had already lifted Q2 FY27 revenue growth guidance to ~50% year-on-year, up from ~30%, citing hyperscalers building AI infrastructure. That's the same guidance raise that drove July's ~23% pop.

The bill attached: serving that likely means expanding Singapore — roughly €700m of capex over two years to add about 1m more SOI wafers. The €200 target assumes Soitec spends it and fills it.

The half getting less attention: mobile. McDowell expects RF-SOI to decline faster than consensus and sees Mobile capped under €400m a year through the forecast window. So this is photonics carrying a shrinking phone business — not both compounding.

Who else is exposed

US optics names ran the same session — Lumentum +9.6% and Coherent +6.9% — but 24/7 Wall St attributed that to an oversold bounce and short covering after a month-long slide, not to the Soitec note. Different trigger, same underlying question. The link that does matter is sequencing: photonics substrates sit upstream of the optical engines these firms ship, so a wafer maker locking committed volumes is an early demand tell. The sources don't name Soitec's photonics customers, so read it as a signal about the order pipeline, not as a supply contract between these companies. More moves on the movers page.

What flips it

Q2 FY27 revenue lands 18 November (calendar). Management has promised roughly 50% growth. If photonics prints short of that while RF-SOI falls faster than guided, the €200 target is the first thing to be cut — the entire re-rating rests on a run rate that has not been reported yet.

As of 17 Sep 2026, 14:35 IST / 05:05 ET; prices are the 16 Sep close as reported. Sources: Investing.com, Investing.com (upgrade detail), Saxo Market Quick Take, MarketScreener calendar. For discussion and education only — not investment advice. Verify before acting.