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. 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
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
2014-06-01University of Pennsylvania Health SystemTheft or lossHealthcarePA, US661 recordsVCDB
2014-05-30Midwest Urological GroupTheft or lossHealthcareIL, US1,000 recordsVCDB
2014-05-15Symbius MedicalInsider misuseHealthcareAZ, US—VCDB
2014-05-13Hurley Medical CenterError / misconfigurationHealthcareMI, US—VCDB
2014-05-09Options Counseling CenterTheft or lossHealthcareNJ, US2,828 recordsVCDB
2014-05-09Touchstone Medical ImagingError / misconfigurationHealthcareOR, US308k recordsVCDB
2014-05-01Bay Area Pain Medical AssociatesTheft or lossHealthcareCA, US2,780 recordsVCDB
2014-05-01Denver VA Medical CenterTheft or lossHealthcareCO, US239 recordsVCDB
2014-05-01HEATHERWOOD AND WEXHAM PARK HOSPITALS NHS FOUNDATION TRUSTError / misconfigurationHealthcareGB—VCDB
2014-05-01Midwest Womens Healthcare SpecialistsError / misconfigurationHealthcareMO, US1,532 recordsVCDB
2014-04-29Reading Health SystemError / misconfigurationHealthcarePA, US1,845 recordsVCDB
2014-04-25Iowa Medicaid EnterpriseInsider misuseHealthcareIA, US862 recordsVCDB
2014-04-25New York University Langone Medical CenterTheft or lossHealthcareNY, US500 recordsVCDB
2014-04-25The Garlands of BarringtonInsider misuseHealthcareIL, US1 recordsVCDB
2014-04-24NRAD Medical AssociatesHacking / intrusionHealthcareNY, US100k recordsVCDB
2014-04-23Boston Children's HospitalHacking / intrusionHealthcareUS—VCDB
2014-04-16Greenwood Leflore HospitalTheft or lossHealthcareMS, US3,750 recordsVCDB
2014-04-14Healthy Connections, IncError / misconfigurationHealthcareCA, US793 recordsVCDB
2014-04-11Penn State Hershey Medical CenterInsider misuseHealthcarePA, US1,800 recordsVCDB
2014-04-06Orange Community MRIHacking / intrusionHealthcareNJ, US35k recordsVCDB
2014-04-01Croydon University HospitalError / misconfigurationHealthcareGB1 recordsVCDB
2014-04-01Florida Radiology ConsultantsHacking / intrusionHealthcareFL, US9 recordsVCDB
2014-04-01Hackensack University Medical CenterInsider misuseHealthcareNJ, US—VCDB
2014-04-01Manioba HealthInsider misuseHealthcareCA1 recordsVCDB
2014-04-01ProMedica Bay Park HospitalInsider misuseHealthcareOH, US594 recordsVCDB
2014-03-31Sault Area HospitalInsider misuseHealthcareCA144 recordsVCDB
2014-03-29Sharper FutureTheft or lossHealthcareCA, US—VCDB
2014-03-27Elliot HospitalTheft or lossHealthcareNH, US1,208 recordsVCDB
2014-03-25Catholic Health InitiativesHacking / intrusionHealthcareCO, US—VCDB
2014-03-25StayWell Healthcare, Inc.Hacking / intrusionHealthcareCT, US7,140 recordsVCDB
2014-03-24Yellowstone Boys and Girls RanchTheft or lossHealthcareMT, US623k recordsVCDB
2014-03-16Hospitalists of ArizonaTheft or lossHealthcareAZ, US1,706 recordsVCDB
2014-03-13Detroit Medical Center - Harper University HospitalTheft or lossHealthcareMI, US1,087 recordsVCDB
2014-03-13Todd M. Burton, M.D.Theft or lossHealthcareTX, US5,000 recordsVCDB
2014-03-04Larsen Dental CareTheft or lossHealthcareID, US—VCDB
2014-03-04Saint Francis HospitalError / misconfigurationHealthcareOK, US—VCDB
2014-03-04University of Massachusetts Memorial Medical CenterInsider misuseHealthcareMA, US2,387 recordsVCDB
2014-03-01Buffalo Heart GroupInsider misuseHealthcareNY, US550 recordsVCDB
2014-03-01Carnival Village TrustInsider misuseHealthcareGB—VCDB
2014-03-01Coordinated HealthTheft or lossHealthcarePA, US70 recordsVCDB
2014-03-01District Medical GroupError / misconfigurationHealthcareAZ, US616 recordsVCDB
2014-03-01Molina Healthcare IncError / misconfigurationHealthcareCA, US5,261 recordsVCDB
2014-03-01TrustHCSInsider misuseHealthcareMO, US—VCDB
2014-02-26Care Advantage, Inc.Theft or lossHealthcareVA, US3,458 recordsVCDB
2014-02-24UnknownTheft or lossHealthcareCA—VCDB
2014-02-22Palomar HealthTheft or lossHealthcareCA, US5,000 recordsVCDB
2014-02-21COORDINATED HEALTH SYSTEMSTheft or lossHealthcarePA, US733 recordsVCDB
2014-02-18Shaker ClinicError / misconfigurationHealthcareOH, US617 recordsVCDB
2014-02-18St. Joseph HealthError / misconfigurationHealthcareCA, US—VCDB
2014-02-14Assisted Living Concepts LLCHacking / intrusionHealthcareIL, US44k 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 01:48 UTC.