MasTec, Inc. experienced an external system breach detected on April 23, 2026, that occurred on August 9, 2025. The company notified consumers of the incident on June 5, 2026. This information was disclosed through a data breach notice submitted to the Maine Attorney General.
The breach involved names and other personal identifiers. It is estimated that 25,220 individuals were affected, including 11 Maine residents. The specific types of "other personal identifiers" have not been publicly confirmed. MasTec, Inc. offered identity theft protection services through CyEx Financial Shield.
Additional details about the breach, such as whether financial or medical data were involved, or if regulatory investigations are open in other states, remain unclear. Information regarding the full scope of individuals affected and potentially compromised data types may emerge.