Operadora de Sites Mexicanos is a Mexican company that builds, installs, maintains, operates and sells several types of passive telecommunications infrastructure, including towers, support structures, physical spaces and other non-electronic elements. With approximately 23,000 towers distributed across the nine regions of Mexico, it is currently the main supplier of this type of infrastructure in the country. Moreover, the company has presence in Costa Rica with a portfolio of 310 towers.

Operadora de Sites Mexicanos, S.A.B. de C.V. has the following participation in two entities: