The result of the 2017 SDM 100 was upbeat: Collectively, the industry’s 100 largest security dealers grew their recurring monthly revenue (RMR) 18.4 percent, from $612 million to $725 million, last year. They grew their subscriber base by more than 1 million customers; and they grew total annual revenue 6.2 percent in 2016. The SDM 100 is a ranking by RMR of the largest U.S. security installation and monitoring companies. Among the top 100, there were 88 dealers who individually improved their RMR rate in 2016 over 2015.