Breaches & incidents

The victims' side of the threat pictureWho is being attacked

Data breaches and cyber incidents made public — reported to regulators, disclosed by the companies themselves, or catalogued after a leak. Who was hit, when, how, and how many people or accounts were affected.

Incidents disclosed
618
last 12 months, every source
People in US health breaches
70.5M
477 breaches reported to HHS
Material incidents, US listed firms
23
SEC 8-K Item 1.05, 12 months
Accounts in new breach records
522.5M
126 breaches added to HIBP

Coverage. Mostly the United States: the cleanest public records of named victims come from US regulators. Ransomware victims worldwide, India included, are on the ransomware victims page. Every count is a lower bound — only disclosed incidents appear.

1Key findings

  • Most common attackHacking / intrusion78% of named-victim incidents in the last 24 months
  • Most targeted sectorHealthcare754 incidents in the last 24 months
  • Most people affectedConduent Business Services LLC62.2M people · 8 Oct 2025
  • Most accounts exposed1win96.2M accounts · 2 Nov 2024
  • Named most oftenFieldtex Products, Inc.in 5 disclosures, 20 Nov 2025 – 12 Dec 2025
  • Latest disclosurePark Dental Partners, Inc.Hacking / intrusion · 7 Oct 2026 · SEC 8-K

3Sectors

Who the incidents hit, where the source names a sector, and how each sector was attacked.

Most affected sectorsLast 24 months. Select one to list its incidents.
  1. Healthcare754
  2. Information28
  3. Manufacturing21
  4. Professional Services19
  5. Retail18
  6. Finance, Insurance & Real Estate6
  7. Services5
  8. Transportation4
  9. Technology4
  10. Accommodation & Food3
  11. Administrative3
  12. Other Services2
Sector against type of attackIncidents per sector (rows) and attack type (columns). Darker means more.
  • In healthcare, 91% of incidents were hacking / intrusion.
Hacking / intrusionData breach (cause not stated)Unauthorised access or disclosureRansomwareTheft or lossError / misconfiguration
Healthcare68562241
Information253
Manufacturing201
Professional Services181
Retail171
Finance, Insurance & Real Estate6
Services5
Transportation4

4Largest incidents

The last 24 months. People and accounts are counted apart: an account list can hold one person many times. Credential compilations, which name no victim, are left out.

By people affected
  1. 1
    Conduent Business Services LLC62.2M people
    8 Oct 2025 · Hacking / intrusion · Healthcare · HHS
  2. 2
    DentaQuest, LLC15.0M people
    16 Jul 2026 · Hacking / intrusion · Healthcare · HHS
  3. 3
    Aflac Incorporated (“Aflac”)13.9M people
    8 Aug 2025 · Hacking / intrusion · Healthcare · HHS
  4. 4
    Aesto, LLC9.5M people
    31 Jul 2026 · Hacking / intrusion · Healthcare · HHS
  5. 5
    Episource, LLC6.7M people
    6 Jun 2025 · Hacking / intrusion · Healthcare · HHS
  6. 6
    AdaptHealth, LLC4.1M people
    14 Aug 2026 · Hacking / intrusion · Healthcare · HHS
  7. 7
    Unlimited Technology Systems, LLC3.8M people
    21 Jul 2026 · Hacking / intrusion · Healthcare · HHS
  8. 8
    CareCloud, Inc.3.8M people
    24 Jul 2026 · Hacking / intrusion · Healthcare · HHS
By accounts exposed
  1. 1
    1win96.2M accounts
    2 Nov 2024 · Data breach (cause not stated) · HIBP
  2. 2
    Under Armour72.7M accounts
    17 Nov 2025 · Data breach (cause not stated) · HIBP
  3. 3
    Suno55.3M accounts
    25 Nov 2025 · Data breach (cause not stated) · HIBP
  4. 4
    Canadian Tire38.3M accounts
    2 Oct 2025 · Data breach (cause not stated) · HIBP
  5. 5
    Addi34.5M accounts
    25 Mar 2026 · Data breach (cause not stated) · HIBP
  6. 6
    SoundCloud29.8M accounts
    15 Dec 2025 · Data breach (cause not stated) · HIBP
  7. 7
    Speedio27.5M accounts
    24 Dec 2024 · Data breach (cause not stated) · HIBP
  8. 8
    Paidwork23.3M accounts
    29 Mar 2026 · Data breach (cause not stated) · HIBP

5Hit more than once

Organisations named in more than one disclosure in the last 5 years (30 in all). That can be separate attacks, or one incident reported to more than one place — a regulator and investors, or on behalf of several clients.

OrganisationDisclosuresFirst – latestTypes of attackSources
Fieldtex Products, Inc. · Healthcare520 Nov 2025 – 12 Dec 2025Hacking / intrusionHHS
AltaMed Health Services Corporation · Healthcare31 Jun 2023 – 26 Feb 2026Hacking / intrusionRansomwareUnauthorised access or disclosureHHS, VCDB
United Healthcare Student Resources · Finance & Insurance31 Jun 2023 – 1 Jun 2023RansomwareVCDB
DentaQuest, LLC · Healthcare223 May 2026 – 16 Jul 2026Data breach (cause not stated)Hacking / intrusionHHS, HIBP
CarMax · Retail22 May 2025 – 24 Jan 2026Data breach (cause not stated)Hacking / intrusionHIBP, VCDB
Park Dental Partners, Inc. · Healthcare228 Aug 2026 – 7 Oct 2026Hacking / intrusionSEC 8-K
WindRose Health Network · Healthcare227 Jan 2026 – 16 Sept 2026Hacking / intrusionHHS
AdaptHealth, LLC · Healthcare227 Jun 2026 – 14 Aug 2026Hacking / intrusionHHS, SEC 8-K
CareCloud, Inc. · Healthcare224 Mar 2026 – 24 Jul 2026Hacking / intrusionHHS, SEC 8-K
Clinical Registry Solutions · Healthcare29 Apr 2026 – 12 Jun 2026Hacking / intrusionHHS, VCDB
Open Arms Care Corporation · Healthcare21 Jun 2025 – 11 Jun 2026Hacking / intrusionHHS, VCDB
Gastro Health · Healthcare222 May 2026 – 22 May 2026Hacking / intrusionHHS

6All incidents

Clear

3,218 incidents match, newest first.

DateOrganisationType of attackSectorWhereAffectedSource
2012-01-01Palo Verde HospitaInsider misuseHealthcareUS—VCDB
2012-01-01Peterborough Regional Health CentreInsider misuseHealthcareCA280 recordsVCDB
2012-01-01Philip P Corneliuson, DDS, Inc.Theft or lossHealthcareCA, US980 recordsVCDB
2012-01-01Planned ParenthoodInsider misuseHealthcareCA, US1 recordsVCDB
2012-01-01Prince Albert Parkland Health RegionInsider misuseHealthcareCA2 recordsVCDB
2012-01-01Providence Holy CrossInsider misuseHealthcareCA, US1 recordsVCDB
2012-01-01Quest DiagnosticsInsider misuseHealthcareNJ, US—VCDB
2012-01-01River Falls Medical ClinicTheft or lossHealthcareWI, US2,400 recordsVCDB
2012-01-01Riverside Health SystemInsider misuseHealthcareIL, US2,318 recordsVCDB
2012-01-01Roseway HospitalInsider misuseHealthcareCA—VCDB
2012-01-01SHIELDS For FamiliesTheft or lossHealthcareCA, US961 recordsVCDB
2012-01-01Sarasota Memorial HospitalInsider misuseHealthcareFL, US—VCDB
2012-01-01Select Rehabilitation Inc.Insider misuseHealthcareIL, US—VCDB
2012-01-01South London Healthcare TrustError / misconfigurationHealthcareGB600 recordsVCDB
2012-01-01South London Healthcare TrustError / misconfigurationHealthcareGB3 recordsVCDB
2012-01-01Surgeons of Lake CountyHacking / intrusionHealthcareIL, US—VCDB
2012-01-01Tampa General HospitalInsider misuseHealthcareFL, US—VCDB
2012-01-01Temple Community HospitalTheft or lossHealthcareCA, US600 recordsVCDB
2012-01-01The Kirkbride CenterTheft or lossHealthcareFL, US922 recordsVCDB
2012-01-01University of Florida Shands Medical CenterPhishing / social engineeringHealthcareFL, US14k recordsVCDB
2012-01-01University of North Carolina Lineberger Cancer CenterHacking / intrusionHealthcareNC, US3,500 recordsVCDB
2012-01-01UnknownHacking / intrusionHealthcareGB—VCDB
2012-01-01UnknownInsider misuseHealthcareGB1 recordsVCDB
2012-01-01UnknownInsider misuseHealthcareVA, US130 recordsVCDB
2012-01-01Unnamed organisationInsider misuseHealthcareUA1 recordsVCDB
2012-01-01Unnamed organisationInsider misuseHealthcareCA, US1 recordsVCDB
2012-01-01Unnamed organisationInsider misuseHealthcareUS5,000 recordsVCDB
2012-01-01Unnamed organisationPhishing / social engineeringHealthcareTN, US—VCDB
2012-01-01Vancouver Coastal HealthInsider misuseHealthcareCA—VCDB
2012-01-01Walking on Air ClinicTheft or lossHealthcareGB1,500 recordsVCDB
2012-01-01Wayne Memorial HospitalInsider misuseHealthcarePA, US400 recordsVCDB
2012-01-01WestCoast Children's ClinicError / misconfigurationHealthcareCA, US—VCDB
2012-01-01Western Memorial Regional HospitalInsider misuseHealthcareCA1,043 recordsVCDB
2012-01-01www.fixasmile.comInsider misuseHealthcareVA, US—VCDB
2011-12-31Impairment ResourcesTheft or lossHealthcareCA, US—VCDB
2011-12-28Sleep HealthCenters LLCTheft or lossHealthcareMA, US2,988 recordsVCDB
2011-12-23Soundpath Health, IncHacking / intrusionHealthcareWA, US7,581 recordsVCDB
2011-12-20Anchorage Community Mental Health Services Inc.MalwareHealthcareAK, US2,743 recordsVCDB
2011-12-15Paul C. Brown, MD, PSTheft or lossHealthcareWA, US4,693 recordsVCDB
2011-12-13Prime Healthcare ServicesInsider misuseHealthcareCA, US1 recordsVCDB
2011-12-08Dallas County Hospital District dba Parkland Health & Hospital SystemUnknownHealthcareTX, US2,464 recordsVCDB
2011-12-08Good Samaritan HospitalTheft or lossHealthcareMD, US1,500 recordsVCDB
2011-12-08Lankenau Medical CenterTheft or lossHealthcarePA, US500 recordsVCDB
2011-12-08Lebanon Internal Medicine AssociatesError / misconfigurationHealthcarePA, US55k recordsVCDB
2011-12-08Logan County Emergency Ambulance Service AuthorityError / misconfigurationHealthcareWV, US13k recordsVCDB
2011-12-08Medcenter OneTheft or lossHealthcareND, US650 recordsVCDB
2011-12-05Jay C. Platt, DDSTheft or lossHealthcareIN, US11k recordsVCDB
2011-12-01Cleveland Clinic FloridaError / misconfigurationHealthcareFL, US772 recordsVCDB
2011-12-01Memorial HealthcarePhishing / social engineeringHealthcareFL, US—VCDB
2011-11-18Amerigroup Community Care of New Mexico, IncTheft or lossHealthcareNM, US1,537 recordsVCDB

Sources: US HHS breach portal, SEC EDGAR, Have I Been Pwned (CC BY 4.0) and the VERIS Community Database (CC BY-SA 4.0). Updated 2026-10-15 15:28 UTC.