Revealing a significant insider sell on October 23, Robert G Brown, 10% Owner at SPAR Group (NASDAQ:SGRP), as per the latest SEC filing. What Happened: Brown’s decision to sell 43,834 shares of SPAR Group was revealed in a Form 4 filing with the U.S. Securities and Exchange Commission on Wednesday. The total value of the sale is $106,078. At Thursday morning, SPAR Group shares are up by 0.83%, 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 manufact…