Making a noteworthy insider sell on October 30, Robert G Brown, 10% Owner at SPAR Group (NASDAQ:SGRP), is reported in the latest SEC filing. What Happened: According to a Form 4 filing with the U.S. Securities and Exchange Commission on Wednesday, Brown sold 21,221 shares of SPAR Group. The total transaction value is $51,991. The latest update on Thursday morning shows SPAR Group shares down by 0.0%, trading at $2.43. Discovering SPAR Group: A Closer LookSPAR Group Inc is a supplier of merchandising and other marketing services. It also provides range of services to retailers, consumer goods m…