MACOM is trading 4.08% up at $286 after closing at $274.80 on September 8, 2026; the catalyst remains unclear.
- No confirmed September 8 company-specific announcement, earnings release, acquisition, or analyst action was found.
- The latest major earnings catalyst was August 6, when MACOM reported strong fiscal third-quarter results and raised guidance; that news is not contemporaneous with this after-hours move.
- Broader-market direction does not clearly explain the gain.