Soitec is trading 4.51% down at €139.75, with profit-taking after its sharp advance a plausible but unconfirmed explanation.
- On September 8, Soitec rose 14.07% to €146.35 after an improved fiscal 2027 revenue-growth outlook, including stronger Photonics-SOI expectations.
- No new company-specific negative announcement for September 9 was identified; the decline remains unresolved.