Shares of Coherent jumped 8.8% in afternoon trading after rival Lumentum Holdings reported fiscal fourth-quarter revenue and earnings that beat Wall Street forecasts and issued stronger-than-expected sales guidance for the upcoming quarter. The upbeat results reinforced expectations of robust demand for optical networking equipment, lifting peers across the sector ahead of Coherent's own fiscal fourth-quarter results scheduled for release after the market close the same day. Analysts expected Coherent to report significant growth fueled by surging demand for optical components used in artificial intelligence data centers. Coherent shares are up 83.5% since the beginning of the year but remain 16.5% below their 52-week high of $426.89 from June 2026.
