Nvidia invested in Corning for their optical fiber and glass. Their revenue will explode in the future as data centers scale out and require more efficient data transfer.
Lumentum provides essential laser chips for datacenters.
Lumentum is becoming the Nvidia of laser chips, growing revenue over 100% a year with a 26-27 forward PE. Nvidia invested in them because data centers need laser chips instead of copper wiring to transfer data efficiently.
Micron is no longer a cyclical stock and is bottlenecked beyond belief. It trades at a very cheap 5 forward PE and generates massive profits, making it a strong long-term hold.