Markel Insurance

Disclosed Jul 2, 20264,220 affectedConfirmed

What is known

People affected	4,220 (as reported by the organization)
Disclosed	Jul 2, 2026
Discovered	Mar 18, 2026
Happened	Mar 17, 2026
Attack	Not stated
Data exposed	Social Security numbersHealth
Sector	Insurance · US
Status	Confirmed

Sources

Official noticeoag.ca.gov

California Attorney General breach notice: Markel Insurance

Official noticeoag.my.site.com

Texas Attorney General data security breach report BR-0005162: Markel Insurance

Official noticein.gov

Indiana Attorney General 2026 data breach report: Markel Insurance

Notices filed

Residents of CAJul 2

California AGCount not stated

History of this record

source2026-10-07

empty to https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/files/DB-October-Year-to-Date-Report-2026.pdfby weeklySource

data_types2026-09-25

[] to ["ssn","health"]by backfillSource

records_basis2026-09-25

empty to organizationby backfillSource

records2026-09-25

empty to 4220by backfillSource

discovered2026-09-25

empty to 2026-03-18by backfillSource

Added2026-09-25

First recordedby backfillSource

First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.

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