Lumentum is trading 4.7% down at $923.04, with no clear overnight catalyst identified.
- Lumentum closed at $968.90 on August 17, 2026.
- Recent earnings and stronger fiscal 2027 guidance supported prior gains but do not explain the decline.
- An investor conference is scheduled for August 18, 2026, at 5:00 p.m. Pacific Time, after the pre-market session.