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. Administrative3
  11. Accommodation & Food3
  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
2009-10-01Jackson Health SystemUnknownHealthcareFL, US1,562 recordsVCDB
2009-09-01BOLTON NHS FOUNDATION TRUSTError / misconfigurationHealthcareGB—VCDB
2009-09-01UnityPoint HealthInsider misuseHealthcareIA, US1,620 recordsVCDB
2009-08-27Martin Luther King Jr. Health CenterError / misconfigurationHealthcareNY, US37k recordsVCDB
2009-08-15TennCareInsider misuseHealthcareTN, US197 recordsVCDB
2009-07-01University of Maryland Medical CenterInsider misuseHealthcareMD, US—VCDB
2009-06-01Providence Physician Services CompanyInsider misuseHealthcareWA, US—VCDB
2009-03-20Northeast Rehabilitation HospitalTheft or lossHealthcareNH, US8 recordsVCDB
2009-03-01Unnamed organisationError / misconfigurationHealthcareUnknown—VCDB
2009-02-01Mercy Walworth Medical CenterInsider misuseHealthcareWI, US1 recordsVCDB
2009-01-01Arkansas Childrens HospitalInsider misuseHealthcareAR, US—VCDB
2009-01-01BOLTON NHS FOUNDATION TRUSTError / misconfigurationHealthcareGB1,300 recordsVCDB
2009-01-01Carrell ClinicHacking / intrusionHealthcareTX, US—VCDB
2009-01-01Dr. Linda GreenPhishing / social engineeringHealthcareFL, US—VCDB
2009-01-01HCA InternationalError / misconfigurationHealthcareGB—VCDB
2009-01-01Holmes Regional Medical CenterInsider misuseHealthcareFL, US—VCDB
2009-01-01Kaiser Permante Bellflower Medical CenterInsider misuseHealthcareCA, US1 recordsVCDB
2009-01-01LabMD, Inc.Insider misuseHealthcareGA, US1,178 recordsVCDB
2009-01-01Letterkenny General HospitalError / misconfigurationHealthcareGB3 recordsVCDB
2009-01-01Massachusetts General HospitalInsider misuseHealthcareMA, US192 recordsVCDB
2009-01-01Phoenix Medical GroupInsider misuseHealthcareNJ, US—VCDB
2009-01-01Prairie North Regional Health AuthorityInsider misuseHealthcareCA151 recordsVCDB
2009-01-01Regina Qu'Appelle Regional Health AuthorityInsider misuseHealthcareCA1 recordsVCDB
2009-01-01Torrance Memorial Medical CenterInsider misuseHealthcareCA, US—VCDB
2008-12-01Sinai Medical Center of Jersey City LLCInsider misuseHealthcareNJ, US—VCDB
2008-11-21Bon Secours Regional Medical CenterInsider misuseHealthcareVA, US—VCDB
2008-11-01Jacksonville Medical CenterInsider misuseHealthcareFL, US1 recordsVCDB
2008-10-01St. Vincent Medical CenterInsider misuseHealthcareAR, US1 recordsVCDB
2008-09-01Murfreesboro Ambulance ServiceInsider misuseHealthcareTN, US—VCDB
2008-06-02University of Utah Hospitals & ClinicsTheft or lossHealthcareUT, US2.2M recordsVCDB
2008-01-31A Caring Hand Home Health Care Services, Inc.Insider misuseHealthcareVA, US30 recordsVCDB
2008-01-01Boulder Community HealthError / misconfigurationHealthcareCO, US178 recordsVCDB
2008-01-01Community Hospital of Upland, PATheft or lossHealthcarePA, US144 recordsVCDB
2008-01-01Healing HeartsInsider misuseHealthcareNC, US—VCDB
2008-01-01LincareError / misconfigurationHealthcareAK, US278 recordsVCDB
2008-01-01Regina Qu'Appelle Regional Health AuthorityInsider misuseHealthcareCA1 recordsVCDB
2008-01-01South Shore Physicians, PCInsider misuseHealthcareNY, US80 recordsVCDB
2008-01-01The PolyclinicInsider misuseHealthcareWA, US14 recordsVCDB
2008-01-01UCLA Health SystemInsider misuseHealthcareCA, US—VCDB
2008-01-01UnknownInsider misuseHealthcareUS—VCDB
2008-01-01Valley cosmetic surgeryInsider misuseHealthcareCA, US31 recordsVCDB
2007-12-01Memorial Hermann Healthcare SystemInsider misuseHealthcareTX, US11k recordsVCDB
2007-10-31Sequoia HospitalError / misconfigurationHealthcareCA, US391 recordsVCDB
2007-10-01Bon Secours DePaul Medical CenterPhishing / social engineeringHealthcareVA, US2 recordsVCDB
2007-10-01Palisades Medical CenterInsider misuseHealthcareNJ, US1 recordsVCDB
2007-07-03Phoenix Cardiac Surgery GroupError / misconfigurationHealthcareAZ, US1,000 recordsVCDB
2007-01-01AetnaInsider misuseHealthcareFL, US50 recordsVCDB
2007-01-01Columbia-St. Mary's Ozaukee HospitalInsider misuseHealthcareWI, US—VCDB
2007-01-01Kings County HospitalInsider misuseHealthcareNY, US1 recordsVCDB
2007-01-01Temple Street Children's HospitalTheft or lossHealthcareIE1.0M 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 23:44 UTC.