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
616
last 12 months, every source
People in US health breaches
70.4M
475 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 sectorHealthcare752 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. Healthcare752
  2. Information28
  3. Manufacturing21
  4. Professional Services19
  5. Retail18
  6. Finance, Insurance & Real Estate6
  7. Services5
  8. Technology4
  9. Transportation4
  10. Administrative3
  11. Accommodation & Food3
  12. Finance & Insurance2
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
Healthcare68461241
Information253
Manufacturing201
Professional Services181
Retail171
Finance, Insurance & Real Estate6
Services5
Technology4

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

3,216 incidents match, newest first.

DateOrganisationType of attackSectorWhereAffectedSource
2016-10-01Parker Jewish Institute for Health Care and RehabilitationInsider misuseHealthcareNY, US3 recordsVCDB
2016-09-29OptumHealthError / misconfigurationHealthcareNM, US2,006 recordsVCDB
2016-09-25Red Cross Blood ServiceError / misconfigurationHealthcareAU1.3M recordsVCDB
2016-09-24Dr. Larrie MandreckRansomwareHealthcareCA, US—VCDB
2016-09-15Pontiac Nursing HomeInsider misuseHealthcareNY, US—VCDB
2016-09-07Saint Francis Health SystemHacking / intrusionHealthcareOK, US6,000 recordsVCDB
2016-09-06Bendigo HealthError / misconfigurationHealthcareAU1 recordsVCDB
2016-09-01Kineto Rehab PHysical Therapy, PLLCTheft or lossHealthcareNew York, US665 recordsVCDB
2016-09-01Seguin Dermatology,RansomwareHealthcareTX, US—VCDB
2016-09-01Sequin DermatologyRansomwareHealthcareTX, US—VCDB
2016-09-01Wood County HospitalRansomwareHealthcareOH, US—VCDB
2016-08-31Al Zahra Private Medical CentreHacking / intrusionHealthcareAE5,044 recordsVCDB
2016-08-24Hospital Auxilio MutuoTheft or lossHealthcareNY, US—VCDB
2016-08-24Man Alive Lane Treatment CenterMalwareHealthcareMD, US860 recordsVCDB
2016-08-22Baystate HealthPhishing / social engineeringHealthcareMA, US13k recordsVCDB
2016-08-12Harbin ClinicError / misconfigurationHealthcareGA, US498 recordsVCDB
2016-08-11Napa Valley DentistryTheft or lossHealthcareCA, US—VCDB
2016-08-10Seattle Indian Health BoardHacking / intrusionHealthcareWA, US—VCDB
2016-08-04Children's Mercy HospitalTheft or lossHealthcareMO, US238 recordsVCDB
2016-08-03Rainbow Children’s ClinicRansomwareHealthcareTX, US33k recordsVCDB
2016-08-01Desert Care clinicRansomwareHealthcareAZ, US500 recordsVCDB
2016-08-01Integrity Transitional HospitalHacking / intrusionHealthcareTX, US30k recordsVCDB
2016-08-01Keck Medical Center of USCRansomwareHealthcareCA, US—VCDB
2016-08-01KidsPeaceError / misconfigurationHealthcareUS—VCDB
2016-08-01Pratap S. Kurra, M.D.Error / misconfigurationHealthcareOR, US2,029 recordsVCDB
2016-08-01Susan M. Hughes CenterRansomwareHealthcareUS11k recordsVCDB
2016-08-01Thomasville Eye CenterInsider misuseHealthcareGA, US11k recordsVCDB
2016-07-29Altamont Internal Medicine & PediatricsError / misconfigurationHealthcareUS2 recordsVCDB
2016-07-29University of Wisconsin HealthError / misconfigurationHealthcareWI, US6,923 recordsVCDB
2016-07-27McAlester Regional Health CenterError / misconfigurationHealthcareOK, US1 recordsVCDB
2016-07-25John E GonzalezTheft or lossHealthcareCA, US1,025 recordsVCDB
2016-07-22Decatur Health SystemsTheft or lossHealthcareKS, US707 recordsVCDB
2016-07-19BRIAN D. HALEVIE-GOLDMAN,Theft or lossHealthcareCA, US2,000 recordsVCDB
2016-07-18U.S. HealthworkTheft or lossHealthcareCA, US1,400 recordsVCDB
2016-07-15College Hill Health CenterError / misconfigurationHealthcareWY, US—VCDB
2016-07-13AsanteInsider misuseHealthcareOR, US2,400 recordsVCDB
2016-07-12St. Elizabeth PhysiciansError / misconfigurationHealthcareKY, US674 recordsVCDB
2016-07-11Ventura County Health Care AgencyError / misconfigurationHealthcareCA, US777 recordsVCDB
2016-07-09Cambridgeshire and Peterborough NHS Foundation TrustTheft or lossHealthcareGB200 recordsVCDB
2016-07-08Island HealthInsider misuseHealthcareCA34 recordsVCDB
2016-07-08LA County+USC Medical CenterInsider misuseHealthcareCA, US743 recordsVCDB
2016-07-07Care Quality CommissionError / misconfigurationHealthcareGB500 recordsVCDB
2016-07-07The Center for Neurosurgical and Spinal DisordersMalwareHealthcareLA, US1,134 recordsVCDB
2016-07-01Care Quality Commission'sError / misconfigurationHealthcareGB500 recordsVCDB
2016-07-01Central Ohio Urology GroupHacking / intrusionHealthcareOH, US300k recordsVCDB
2016-07-01Department of Veterans Affairs (VA) Northern Indiana Health Care System (NIHCS)Error / misconfigurationHealthcareIL, US2 recordsVCDB
2016-07-01Meritus Medical CenterInsider misuseHealthcareMD, US1,029 recordsVCDB
2016-07-01Prosthetic & Orthotic Care, Inc.Hacking / intrusionHealthcareMO, US23k recordsVCDB
2016-07-01Southwest Portland DentalHacking / intrusionHealthcareOR, US—VCDB
2016-07-01University GastroenterologyRansomwareHealthcareRI, US—VCDB

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 2026-10-14 12:44 UTC.