The nation’s 1,000 largest brokerages increased their market share to 52.2 percent by 2020 sales volume, according to the 2021 Mega 1000. That represents a growth of 16.2 percent from their 2017 share. The U.S.’s 10 largest brokerages grew share at an even higher rate over that time period – increasing it 34.8 percent to 31.0 percent total share. T3 Sixty data continues to show, again and again, the largest companies in real estate are getting larger, and doing more business. The industry is in an arms race as the big aim to get bigger.