Optical component supplier Lumentum saw its stock climb 21% over the last five trading days. The company achieved record revenue of $808 million in fiscal Q3 2026, marking a 90% year-over-year increase. Management noted that the supply of EML laser chips lags demand by over 30%, with pump and narrow linewidth lasers even more constrained, keeping shipments well below customer demand. Lumentum guided fiscal Q4 2026 revenue to a range of $960 million to $1.01 billion.