Disclosed on October 30, William Dawson, Board Member at McGrath RentCorp (NASDAQ:MGRC), executed a substantial insider sell as per the latest SEC filing. What Happened: Dawson’s decision to sell 20,000 shares of McGrath RentCorp was revealed in a Form 4 filing with the U.S. Securities and Exchange Commission on Wednesday. The total value of the sale is $2,300,052. As of Thursday morning, McGrath RentCorp shares are down by 0.0%, currently priced at $116.26. Get to Know McGrath RentCorp BetterMcGrath RentCorp is a rental company. It is comprised of four reportable business segments: Modular bu…