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. 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
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
2016-01-18City of Hope HospitalHacking / intrusionHealthcareCA, US4 recordsVCDB
2016-01-15Hurley Medical CenterMalwareHealthcareMI, US—VCDB
2016-01-14Vidant HealthHacking / intrusionHealthcareNC, US897 recordsVCDB
2016-01-04Premier HealthcareTheft or lossHealthcareIN, US206k recordsVCDB
2016-01-01Access Health Care PhysiciansTheft or lossHealthcareFL, US2,500 recordsVCDB
2016-01-01Ailsa Hospital and University Hospital AyrError / misconfigurationHealthcareGB8 recordsVCDB
2016-01-01Anhui Women and Children Health HospitalHacking / intrusionHealthcareCN6,000 recordsVCDB
2016-01-01Apria HealthcareHacking / intrusionHealthcareCA, US912 recordsVCDB
2016-01-01Arkansas State HospitalInsider misuseHealthcareAK, US—VCDB
2016-01-01Ascension Parish Health UnitPhishing / social engineeringHealthcareLA, US400 recordsVCDB
2016-01-01Banner Boswell HospitalInsider misuseHealthcareAZ, US—VCDB
2016-01-01Bay Area Children's AssociationMalwareHealthcareCA, US—VCDB
2016-01-01Baystate HealthMalwareHealthcareMA, US13k recordsVCDB
2016-01-01Beaufort Delta Health AuthorityInsider misuseHealthcareCA67 recordsVCDB
2016-01-01Brant County Health UnitError / misconfigurationHealthcareCA498 recordsVCDB
2016-01-01CHI Good SamaritanUnknownHealthcareNE, US—VCDB
2016-01-01California Correctional Health Care Services (CCHCS)Theft or lossHealthcareCA, US400k recordsVCDB
2016-01-01Carolina Neurosurgery & Spine AssociatesInsider misuseHealthcareNC, US150 recordsVCDB
2016-01-01Charleston Area Medical CenterInsider misuseHealthcareWV, US1 recordsVCDB
2016-01-01Derriford HospitalInsider misuseHealthcareGB37 recordsVCDB
2016-01-01Derriford HospitalRansomwareHealthcareGB—VCDB
2016-01-01Dr. Ronald SchultzError / misconfigurationHealthcareUS—VCDB
2016-01-01East Riding Clinical Commissioning GroupError / misconfigurationHealthcareGB—VCDB
2016-01-01Eastern HealthInsider misuseHealthcareCA11 recordsVCDB
2016-01-01Emergency Medicine AssociatesTheft or lossHealthcareUS1,000 recordsVCDB
2016-01-01Family and Child Services of Lanark, Leeds and GrenvilleHacking / intrusionHealthcareGB285 recordsVCDB
2016-01-01Florida HospitalError / misconfigurationHealthcareFL, US6,000 recordsVCDB
2016-01-01Gold Coast HealthError / misconfigurationHealthcareAU1 recordsVCDB
2016-01-01Grand Street Medical AssociatesError / misconfigurationHealthcareNY, US15k recordsVCDB
2016-01-01Innovative Services NWInsider misuseHealthcareCA—VCDB
2016-01-01Island HealthInsider misuseHealthcareCA197 recordsVCDB
2016-01-01Janeway Children's HospitalError / misconfigurationHealthcareCA19 recordsVCDB
2016-01-01Jefferson Medical AssociatesError / misconfigurationHealthcareMS, US10k recordsVCDB
2016-01-01Kansas Heart HospitalRansomwareHealthcareKS, US—VCDB
2016-01-01Karmanos Cancer CenterError / misconfigurationHealthcareMI, US2,808 recordsVCDB
2016-01-01Lukas HospitalRansomwareHealthcareDE—VCDB
2016-01-01Magnolia Ridge Care and Rehabilitation CenterInsider misuseHealthcareAL, US8 recordsVCDB
2016-01-01Main Line Health Inc. Insider misuseHealthcarePA, US2 recordsVCDB
2016-01-01Manitoba HealthInsider misuseHealthcareCA197 recordsVCDB
2016-01-01Mercy Hospital & Medical CenterError / misconfigurationHealthcareIL, US547 recordsVCDB
2016-01-01Midland Memorial HospitalError / misconfigurationHealthcareTX, US1,468 recordsVCDB
2016-01-01Midland Women's ClinicError / misconfigurationHealthcareTX, US717 recordsVCDB
2016-01-01Modern Home Health CareError / misconfigurationHealthcareCA, US—VCDB
2016-01-01Mount Carmel Medical GroupTheft or lossHealthcareOH, Unknown4,000 recordsVCDB
2016-01-01Mountaintop Area Medical CenterTheft or lossHealthcarePA, US—VCDB
2016-01-01Musgrove Park HospitalInsider misuseHealthcareGB1 recordsVCDB
2016-01-01NSW AmbulanceInsider misuseHealthcareAU130 recordsVCDB
2016-01-01Ottawa HospitalRansomwareHealthcareCA—VCDB
2016-01-01Our Lady of Lourdes HospitalError / misconfigurationHealthcareIE—VCDB
2016-01-01P&O CareRansomwareHealthcareMO, US24k 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 2026-10-14 15:44 UTC.