The 2018 SDM 100 ranks U.S. companies that provide electronic security systems and services to both residential and non-residential customers. This ranking is based on information provided to or, in few cases, estimated by SDM. Ranked companies were asked to submit either an audited or reviewed financial statement, or a copy of their income tax return showing total gross receipts for the stated period. The vast majority of the firms ranked are privately held.
Read the full article here: https://www.sdmmag.com/2018-SDM-100-Rankings#top