RKLY - Why Rockley Photonics Stock Is Rocking Today September, 09 2021 02:27 PM Rockley Photonics Holdings Limited Shares of Rockley Photonics (NYSE: RKLY) , a specialty maker of semiconductors for the healthcare industry, jumped 5.5% as of 2 p.m. EDT Thursday. You can thank Cowen for that. Image source: Getty Images. Continue reading For further details see: Why Rockley Photonics Stock Is Rocking Today