We came across a bullish thesis on Quest Diagnostics Incorporated on Valueinvestorsclub.com by cuyler1903. In this article, we will summarize the bulls’ thesis on DGX. Quest Diagnostics Incorporated 's share was trading at $180.14 as of September 10th. DGX’s trailing and forward P/E were 21.57 and 17.06 respectively according to Yahoo Finance. 5 Highest Paying Countries for Neurosurgeons sfam_photo/Shutterstock.com Quest Diagnostics, Inc. (DGX), based in Secaucus, New Jersey, is a leading provider of di ...