COHR gains 7.21% on 2026-05-13 — AI explainer

What happened

On May 13, 2026, Coherent Corp (COHR) opened approximately 7.46% higher and closed the session up more than 7.2%, as a wave of buying swept through the optical components and photonics sector.

• Applied Optoelectronics surged roughly 8% on the same session, while Lumentum and Coherent each rose around 4–7%, signaling broad sector momentum.
• Coherent is a key supplier of optical transceivers and laser components used in data center and AI networking infrastructure.
• The simultaneous gains across multiple optics names suggest the move was driven by sector-level sentiment rather than a single company-specific event.
• Coherent is frequently cited as a bellwether for optical communications demand, particularly as AI workloads drive increased data center buildout.

Investors and analysts track COHR closely given its exposure to high-growth end markets including cloud computing, 5G, and artificial intelligence infrastructure. The May 13 rally reflects renewed attention to the optical supply chain.