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47 disclosed this week · 26,367 on record

Aon

Disclosed May 26, 2022129,682 affectedConfirmed

Official notice

Aon, a business associate (BA) and covered entity (CE), reported that it experienced a ransomware incident that affected the protected health information (PHI) of 129,682 individuals. The PHI involved included names, dates of birth, Social Security numbers, drivers’ license numbers, health insurance information, and other treatment information. The BA/CE notified HHS, affected individuals, and the media. In response to the breach, the BA/CE offered complimentary credit monitoring and identity theft protection services and implemented additional administrative and technical safeguards. Staff were also retrained on protecting and securing PHI.

What is known

People affected129,682 (as reported to HHS)
DisclosedMay 26, 2022
DiscoveredFeb 25, 2022
HappenedMay 29, 2020
AttackHacking
Data exposedNamesHealth
SectorTech · US
StatusConfirmed

Sources

Notices filed

Other breaches at Aon

History of this record
data_types2026-09-25
[] to ["names","health"]by backfillSource
records_basis2026-09-25
organization to hhsby backfillSource
records2026-09-25
31799 to 129682by backfillSource
summary2026-09-25
empty to Aon, a business associate (BA) and covered entity (CE), reported that it experienced a ransomware incident that affected the protected health information (PHI) of 129,682 individuals. The PHI involved included names, dates of birth, Social by backfillSource
records_basis2026-09-25
empty to organizationby backfillSource
records2026-09-25
empty to 31799by backfillSource
attack2026-09-25
unknown to hackingby backfillSource
discovered2026-09-25
empty to 2022-02-25by 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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