It was reported on October 30, that Karthik Kuppusamy, SVP at Quest Diagnostics (NYSE:DGX) executed a significant insider sell, according to an SEC filing. What Happened: Kuppusamy’s recent move involves selling 1,775 shares of Quest Diagnostics. This information is documented in a Form 4 filing with the U.S. Securities and Exchange Commission on Wednesday. The total value is $278,525. Quest Diagnostics’s shares are actively trading at $155.52, experiencing a down of 0.28% during Thursday’s morning session. Delving into Quest Diagnostics’s BackgroundQuest Diagnostics is a leading independent p…