Serenity, the "white haired stock god": Private optical companies can gain growth exposure through publicly traded stocks Odaily Planet Daily News: Serenity stated in an article on X platform that OpenLight, a private company, seems to be continuously expanding in scale. If you pay attention to its public ecosystem outside of Advantest, related targets include JBL and its partner SIVE for expanding photonic integrated circuits, MRVL and MXL for digital signal processors, TSEM for wafer foundry, and packaging and sub component services provided by TFC Optical 300394.SZ. If not a qualified investor, private growth exposure can usually be obtained through public stocks, and participants in the optical field are closely connected.