UnitedHealthcare

Disclosed Jun 9, 20233 years agoConfirmed

Official notice

What is known

People affected	Not stated in the sources we have
Disclosed	Jun 9, 2023
Discovered	Dec 29, 2022
Happened	Dec 1, 2022
Attack	Hacking
Data exposed	Names
Sector	Finance · US
Status	Confirmed

Sources

Source	Kind
California Attorney General breach notice: UnitedHealthcareoag.ca.gov · Official notice	Official notice
Washington Attorney General breach notice: UnitedHealthcareatg.wa.gov · Official notice	Official notice
Delaware DOJ breach notice: UnitedHealthcareattorneygeneral.delaware.gov · Official notice	Official notice
Oregon DOJ breach notice: UnitedHealthcarejustice.oregon.gov · Official notice	Official notice

Notices filed

Where	Filed	People
Oregon DOJresidents of OR	Jun 9, 2023	16,844
California AGresidents of CA	Aug 31, 2023
Washington AGresidents of WA	Aug 31, 2023	18,418
Oregon DOJresidents of OR	Aug 31, 2023	315,915
Delaware DOJresidents of DE	Sep 22, 2023	470

Other breaches at UnitedHealthcare

Breach	Disclosed	Attack	Sector	Status	Affected
Disclosed Aug 12, 2025Aug 12, 20251 year agoInsider	Aug 12, 20251 year ago	Insider	Insurance	Confirmed	3,215

History of this record

2026-09-25 · disclosed: 2023-08-31 to 2023-06-09 · backfill source
2026-09-25 · data_types: [] to ["names"] · backfill source
2026-09-25 · sector: other to finance · backfill source
2026-09-25 · attack: unknown to hacking · backfill source
2026-09-25 · discovered: empty to 2022-12-29 · backfill source
2026-09-25 · added · backfill source

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

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