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Marathon Health: data breach filings, state by state

Marathon Health has 4 data breach filings on record in 4 government portals. The latest was reported to Vermont AG on Oct 30, 2026, with 8,858 Vermont residents. Data exposed, as filed: Social Security number, Medical / health information, Health insurance, Date of birth, Postal address.

272,467residents counted in 3 states (VT, TX, MA). Latest filing per state, last twelve months
5,684,735people in total, as reported to Texas AG on Oct 30, 2026
4filings in 4 government portals
Oct 30, 2026latest filing, Vermont AG

By portal

PortalFilingsLatest reportPeople in the latest filing
Vermont AG1Oct 30, 20268,858 Vermont residents
Texas AG1Oct 30, 2026234,534 Texas residents
Massachusetts OCABR1Oct 30, 202629,075 Massachusetts residents
California AG1Oct 29, 2026Not published

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.

Case file

Breach window
Aug 24, 2026
Discovered
No discovery date stated in the letters we read
Offered to those affected
credit or identity monitoring through Experian (term not stated in the letter we read)
Third party named
No

Open the case fileWord document

Every filing with the agency links, each state's record against its statutory period with the citation, what the letter offers, prior incidents. Letter facts are quoted so you can check them.

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Every filing

OrganizationSourceStateReportedResidents affectedData exposed
Marathon Health Vermont AG VT Oct 30, 2026 8,858 Social Security numberMedical / health information
Marathon Health Texas AG TX Oct 30, 2026 234,534 Social Security numberMedical / health informationHealth insuranceDate of birth+2
Marathon Health Massachusetts OCABR MA Oct 30, 2026 29,075 Social Security numberMedical / health information
Marathon Health California AG CA Oct 29, 2026 Not published Postal addressName

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.