PLAB - Photronics inc (PLAB) Q4 2021 Earnings Call Transcript December, 08 2021 12:00 PM Photronics Inc. Image source: The Motley Fool. Photronics, inc (NASDAQ: PLAB) Q4 2021 Earnings Call Dec 8, 2021 , 8:30 a.m. ET Operator Continue reading For further details see: Photronics, inc (PLAB) Q4 2021 Earnings Call Transcript