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MasTec: data breach filings, state by state

MasTec has 3 data breach filings on record in 3 government portals. The latest was reported to Massachusetts OCABR on Jun 9, 2026, with 142 Massachusetts residents. Data exposed, as filed: Social Security number, Driver's license / state ID, Financial / bank account, Date of birth, Postal address.

4,977residents counted in 3 states (MA, TX, VT). Latest filing per state, last twelve months
25,220people in total, as reported to Texas AG on Jun 9, 2026
3filings in 3 government portals
Jun 9, 2026latest filing, Massachusetts OCABR

By portal

PortalFilingsLatest reportPeople in the latest filing
Massachusetts OCABR1Jun 9, 2026142 Massachusetts residents
Texas AG1Jun 9, 20264,827 Texas residents
Vermont AG1Jun 5, 20268 Vermont residents

Counts are the organization's own, as filed with each agency. Most state portals count their own residents only, so no single state shows the whole incident. An organization can file more than once for the same incident, and for different ones.

The next state to file on MasTec reaches subscribers within the hour. With the count, the data exposed and the letter. The Team plan follows the companies and vendors you name in every state. Start a 14-day free trial.
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Every filing

OrganizationSourceStateReportedResidents affectedData exposed
MasTec Massachusetts OCABR MA Jun 9, 2026 142 Social Security numberDriver's license / state ID
MasTec, Inc. Texas AG TX Jun 9, 2026 4,827 Social Security numberFinancial / bank accountDate of birthPostal address+1
MasTec, Inc. Vermont AG VT Jun 5, 2026 8 Social Security numberFinancial / bank account

Data reproduced from public government filings. Each row opens the record with the agency link. Spot an error? Email support@breachtally.com with the page link. Corrections are applied and noted.