PDCO – Patterson Companies Invest with Canada's low cost leader. Sign up for Questrade and get $50 in free trades.Click here to get started! Stock Price PDCO Quotes by TradingView Stock Description PDCO is the stock symbol for Patterson Companies on the NASDAQ Stock Market (NASDAQ). PDCO Profile by TradingView Stock Chart PDCO Quotes by TradingView Technical Analysis Technical Analysis for PDCO by TradingView NASDAQ StocksNASDAQ Stocks PStocks