David Whitney, VP at McGrath RentCorp (NASDAQ:MGRC), reported an insider sell on October 31, according to a new SEC filing. What Happened: After conducting a thorough analysis, Whitney sold 5,176 shares of McGrath RentCorp. This information was disclosed in a Form 4 filing with the U.S. Securities and Exchange Commission on Thursday. The total transaction value is $605,581. The latest market snapshot at Thursday morning reveals McGrath RentCorp shares down by 0.0%, trading at $116.26. Unveiling the Story Behind McGrath RentCorpMcGrath RentCorp is a rental company. It is comprised of four repor…