Independent public-records tracker. Not a government website.Facts from official state, HHS and SEC filings
BreachRecord

Largest data breaches of 2026

The 100 data breaches first reported in 2026 with the most people affected, using official totals from the filings. Where no official total was filed, the number is the sum of state filings and is labelled "At least". Facts come from official filings with US state attorneys general, the U.S. Department of Health and Human Services (HHS) and the SEC; each breach page links its sources.

Updated Oct 21, 2026 · Showing 1–100 of 100

# Organization First filed People affected Information exposed Filed with
1 DriveWealthDriveWealth breach history 30,000,000Official total
  • Social Security number
  • Financial account number
  • Name
 California AG, Texas AG
2 DentaQuest, LLCDentaQuest breach history 15,000,000Official total
  • Social Security number
  • Medical information
  • Health insurance information
  • +4 more
 Washington AG, HHS, California AG, Texas AG
3 IDScan.netIDScan.net breach history 13,000,000Official total
  • Driver's license
  • Government ID number
  • Date of birth
  • +1 more
 Texas AG
4 Aesto, LLCAesto, LLC breach history 9,540,683Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +3 more
 HHS, Washington AG
5 iRhythm Technologies Inc.iRhythm Technologies Inc. breach history 8,179,772Official total
  • Medical information
  • Health insurance information
  • Date of birth
  • +3 more
 Texas AG, California AG
6 AssuranceAmerica Managing General Agency, LLCAssuranceAmerica Managing General Agency, LLC breach history 6,998,886Official total
  • Social Security number
  • Driver's license
  • Financial account number
  • +4 more
 Washington AG, California AG, Texas AG
7 TriZetto Provider SolutionsTriZetto Provider Solutions breach history 6,974,232Official total
  • Social Security number
  • Medical information
  • Financial account number
  • +5 more
 Washington AG, HHS, California AG, Texas AG
8 Carnival CorporationCarnival Corporation breach history 5,995,277Official total
  • Driver's license
  • Passport number
  • Government ID number
  • +3 more
 Washington AG, California AG, Texas AG
9 Heights Finance Holdings Co.Heights Finance Holdings Co. breach history 4,132,834Official total
  • Social Security number
  • Driver's license
  • Government ID number
  • +5 more
 Texas AG
10 AdaptHealth, LLCAdaptHealth, LLC breach history 4,115,802Official total
  • Medical information
  • Health insurance information
  • Date of birth
  • +3 more
 SEC, Washington AG, Texas AG, HHS, California AG
11 Unlimited Technology Systems, LLCUnlimited Technology Systems, LLC breach history 3,836,316Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +8 more
 Washington AG, HHS, California AG, Texas AG
12 Medtronic Inc.Medtronic Inc. breach history 3,834,294Official total
  • Social Security number
  • Medical information
  • Date of birth
  • +3 more
 Washington AG, California AG, Texas AG
13 CareCloud, Inc.CareCloud, Inc. breach history 3,756,469Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +4 more
 SEC, Washington AG, HHS, California AG
14 CareCloud, Inc.CareCloud, Inc. breach history 3,756,469Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +6 more
 Texas AG
15 Texas Parks and WildlifeTexas Parks and Wildlife breach history 3,187,000Official total
  • Social Security number
  • Driver's license
  • Government ID number
  • +4 more
 Texas AG
16 QualDerm Partners, LLCQualDerm Partners, LLC breach history 3,117,874Official total
  • Medical information
  • Health insurance information
  • Date of birth
  • +2 more
 HHS, Washington AG, California AG, Texas AG
17 Baylor GeneticsBaylor Genetics breach history 2,810,878Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +6 more
 HHS, Texas AG
18 Navia Benefit Solutions, Inc.Navia Benefit Solutions, Inc. breach history 2,697,540Official total
  • Social Security number
  • Medical information
  • Date of birth
  • +3 more
 Washington AG, HHS, California AG, Texas AG
19 Nacogdoches Memorial Hospital nNacogdoches Memorial Hospital n breach history 2,507,073Official total
  • Medical information
 HHS
20 Insightin Health, Inc.Insightin Health, Inc. breach history 1,949,534Official total
  • Medical information
 HHS
21 New York City Health and Hospitals CorporationNew York City Health & Hospitals Corporation breach history 1,800,000Official total
  • Medical information
 HHS
22 Insightin Health, Inc.Insightin Health, Inc. breach history 1,777,141Official total
  • Medical information
  • Health insurance information
  • Name
  • +1 more
 Texas AG
23 CenterPoint Energy, Inc.CenterPoint Energy, Inc. breach history 1,611,625Official total
  • Social Security number
  • Driver's license
  • Name
  • +1 more
 Texas AG
24 Strategic Education Inc.Strategic Education Inc. breach history 1,513,518Official total
  • Social Security number
  • Driver's license
  • Passport number
  • +2 more
 Washington AG, California AG, Texas AG
25 Kaplan North America, LLCKaplan North America, LLC breach history 1,403,060Official total
  • Social Security number
  • Driver's license
  • Name
 Washington AG, California AG, Texas AG
26 Everside HealthEverside Health breach history 1,389,758Official total
  • Social Security number
  • Medical information
  • Date of birth
  • +2 more
 Washington AG, California AG, Texas AG
27 DermCare ManagementDermCare Management breach history 1,367,176Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +4 more
 Texas AG
28 MCBS, LLCMCBS, LLC breach history 1,241,154Official total
  • Social Security number
  • Medical information
  • Health insurance information
  • +3 more
 HHS, California AG, Texas AG
29 Paradigm Healthcare ServicesParadigm Healthcare Services breach history 970,403Official total
  • Medical information
  • Health insurance information
  • Date of birth
  • +2 more
 HHS, California AG
30 Wilmer Cutler Pickering Hale and Dorr LLPWilmer Cutler Pickering Hale and Dorr LLP breach history 911,658Official total
  • Social Security number
  • Driver's license
  • Date of birth
  • +3 more
 California AG, Washington AG, Texas AG
31 Illinois Department of Human ServicesIllinois Department of Human Services breach history 705,017Official total
  • Medical information
 HHS
32 SitusAMC Holdings CorporationSitusAMC Holdings Corporation breach history 662,701Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +7 more
 Washington AG, California AG, Texas AG
33 Call-on-DocCall-on-Doc breach history 648,535Official total
  • Medical information
  • Name
 Texas AG
34 ApolloMD Business Services, LLCApolloMD Business Services, LLC breach history 626,540Official total
  • Medical information
 HHS
35 AssetMark, Inc.AssetMark, Inc. breach history 570,000Official total
  • Social Security number
  • Name
 Washington AG, Texas AG, California AG
36 Erie Family Health CentersErie Family Health Centers breach history 570,000Official total
  • Medical information
 HHS
37 Centers Lab NJ LLCCenters Lab NJ LLC breach history 542,377Official total
  • Medical information
 HHS
38 IMA Diligence Services, LLCIMA Diligence Services, LLC breach history 525,306Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +4 more
 Texas AG
39 AssuranceAmerica Managing General Agency, LLCAssuranceAmerica Managing General Agency, LLC breach history 489,825Official total
  • Driver's license
  • Date of birth
  • Name
  • +2 more
 Texas AG
40 Covenant Health, Inc.Covenant Health, Inc. breach history 478,188Official total
  • Social Security number
  • Medical information
  • Health insurance information
  • +2 more
 California AG, Texas AG
41 Allied Health MSO Holdco, LLCAllied Health MSO Holdco, LLC breach history 447,304Official total
  • Social Security number
  • Name
 Texas AG
42 Saber Healthcare IncSaber Healthcare Inc breach history 427,084Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +6 more
 Texas AG
43 Together Women's Health LLC (Aesto)Together Women's Health LLC breach history 416,262Official total
  • Social Security number
  • Medical information
  • Date of birth
  • +2 more
 Texas AG
44 Monmouth UniversityMonmouth University breach history 399,600Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +9 more
 California AG, Texas AG
45 District of Columbia, Department of Health Care FinanceDistrict of Columbia, Department of Health Care Finance breach history 399,086Official total
  • Medical information
 HHS
46 Business or Organization Name* Cierant CorporationBusiness or Organization Name* Cierant Corporation breach history 390,472Official total
  • Medical information
  • Health insurance information
  • Date of birth
  • +2 more
 Texas AG
47 Gulshan Management Services, Inc.Gulshan Management Services, Inc. breach history 377,082Official total
  • Social Security number
  • Driver's license
  • Government ID number
  • +3 more
 Texas AG
48 Cornerstone Staffing Solutions, Inc.Cornerstone Staffing Solutions, Inc. breach history 366,122Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +9 more
 Washington AG, California AG, Texas AG
49 Networking Technology, Inc.Networking Technology, Inc. breach history 353,844Official total
  • Social Security number
  • Medical information
  • Date of birth
  • +1 more
 Washington AG, Texas AG, HHS, California AG
50 Lennar Mortgage, LLCLennar Mortgage, LLC breach history 348,416Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +6 more
 Washington AG, Texas AG, California AG
51 Blueberry PediatricsBlueberry Pediatrics breach history 340,915Official total
  • Medical information
  • Health insurance information
  • Date of birth
  • +5 more
 California AG, Texas AG
52 Cookeville Regional Medical CenterCookeville Regional Medical Center breach history 337,917Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +5 more
 Texas AG
53 ADT, Inc.ADT, Inc. breach history 331,536Official total
  • Social Security number
  • Date of birth
  • Name
  • +1 more
 Washington AG, Texas AG
54 American Addiction CentersAmerican Addiction Centers breach history 327,754Official total
  • Social Security number
  • Medical information
  • Health insurance information
  • +2 more
 Washington AG, HHS, California AG
55 MedImpact Healthcare Systems, Inc.MedImpact Healthcare Systems, Inc. breach history 327,082Official total
  • Social Security number
  • Medical information
  • Health insurance information
  • +3 more
 California AG, Texas AG
56 Check CityCheck City breach history 322,687Official total
  • Social Security number
  • Driver's license
  • Government ID number
  • +4 more
 Washington AG, California AG, Texas AG
57 Monroe UniversityMonroe University breach history 320,973Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +3 more
 California AG, Texas AG
58 Lifespan Physician Group of Massachusetts, Inc. d/b/a Brown Health Medical Group-MALifespan Physician Group of Massachusetts, Inc. breach history 311,760Official total
  • Medical information
 HHS
59 Pediatric Products, LLCPediatric Products, LLC breach history 305,187Official total
  • Medical information
  • Health insurance information
  • Date of birth
  • +1 more
 Washington AG, Texas AG, California AG
60 North Texas Behavioral Health AuthorityNorth Texas Behavioral Health Authority breach history 284,885Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +4 more
 HHS, Texas AG
61 Premier Medical Group of the Hudson Valley P.C.Premier Medical Group of the Hudson Valley P.C. breach history 282,075Official total
  • Medical information
 HHS
62 Florida Physician SpecialistsFlorida Physician Specialists breach history 276,498Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +4 more
 HHS, Texas AG
63 Radiology Associates of RichmondRadiology Associates of Richmond breach history 266,183Official total
  • Medical information
  • Government ID number
  • Financial account number
  • +1 more
 HHS, Texas AG
64 Ridgeway Pharmacy LtdRidgeway Pharmacy Ltd breach history 258,920Official total
  • Medical information
  • Financial account number
  • Payment card
  • +4 more
 HHS, California AG, Texas AG
65 Yellow Corporation and its affiliated debtors and debtors-in-possession under their jointly administered chapter 11 cases (Case No. 23-11069 (Bankr. D. Del. (CTG))Yellow Corporation and its affiliated debtors and debtors-in-possession under their jointly administered chapter 11 cases breach history 258,781Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +7 more
 California AG, Texas AG
66 Lone Star Community Health CenterLone Star Community Health Center breach history 257,102Official total
  • Social Security number
  • Medical information
  • Government ID number
  • +2 more
 Texas AG
67 Village Practice Management Company, LLCVillage Practice Management Company, LLC breach history 250,821Official total
  • Social Security number
  • Medical information
  • Date of birth
  • +1 more
 Texas AG
68 Tower Administrative Services, IncTower Administrative Services, Inc breach history 248,940Official total
  • Social Security number
  • Financial account number
  • Name
 California AG, Washington AG, Texas AG
69 Catalyst Physician GroupCatalyst Physician Group breach history 248,144Official total
  • Social Security number
  • Medical information
  • Date of birth
  • +2 more
 California AG, Texas AG
70 Poppins Payroll CompanyPoppins Payroll Company breach history 246,937Official total
  • Social Security number
  • Financial account number
  • Date of birth
  • +1 more
 California AG, Texas AG
71 World Acceptance CorporationWorld Acceptance Corporation breach history 232,401Official total
  • Social Security number
  • Driver's license
  • Name
 Texas AG
72 Iroquois Memorial HospitalIroquois Memorial Hospital breach history 217,703Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +6 more
 Texas AG
73 Suffolk Federal Credit UnionSuffolk Federal Credit Union breach history 212,873Official total
  • Social Security number
  • Financial account number
  • Name
  • +1 more
 California AG, Texas AG
74 Sheppard, Mullin, Richter & Hampton LLPSheppard, Mullin, Richter & Hampton LLP breach history 204,001Official total
  • Social Security number
  • Driver's license
  • Government ID number
  • +1 more
 California AG, Texas AG
75 Deaconess Health SystemDeaconess Health System breach history 203,874Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +3 more
 Texas AG
76 Boston Healthcare for the Homeless ProgramBoston Healthcare for the Homeless Program breach history 201,260Official total
  • Social Security number
  • Medical information
  • Health insurance information
  • +1 more
 California AG, Texas AG, HHS
77 Educational Employees Credit UnionEducational Employees Credit Union breach history 201,185Official total
  • Social Security number
  • Driver's license
  • Financial account number
  • +2 more
 California AG, Texas AG
78 Frost BankFrost Bank breach history 200,271Official total
  • Social Security number
  • Financial account number
  • Date of birth
  • +2 more
 Texas AG, California AG
79 Eyemart Express, LLCEyemart Express, LLC breach history 189,450Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +7 more
 Texas AG, Washington AG, California AG
80 Quatrro Business Support Services, Inc.Quatrro Business Support Services, Inc. breach history 188,218Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +4 more
 Washington AG, California AG, Texas AG
81 Catalyst Brands LLCCatalyst Brands LLC breach history 187,341Official total
  • Social Security number
  • Driver's license
  • Passport number
  • +8 more
 Washington AG, California AG, Texas AG
82 Heritage BankHeritage Bank breach history 185,288Official total
  • Social Security number
  • Government ID number
  • Financial account number
 California AG, Texas AG
83 Fried, Frank, Harris, Shriver & Jacobson LLPFried, Frank, Harris, Shriver & Jacobson LLP breach history 179,613Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +7 more
 Washington AG, California AG, Texas AG
84 Fairwinds Credit UnionFairwinds Credit Union breach history 172,566Official total
  • Social Security number
  • Driver's license
  • Name
  • +1 more
 California AG, Texas AG
85 Anatomic and Clinical Laboratory Associates, P.C.Anatomic and Clinical Laboratory Associates, P.C. breach history 169,626Official total
  • Medical information
 HHS
86 Sandhills Medical Foundation , Inc.Sandhills Medical Foundation breach history 169,017Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +4 more
 Texas AG
87 Lake Region HealthcareLake Region Healthcare breach history 167,617Official total
  • Social Security number
  • Medical information
  • Health insurance information
  • +3 more
 HHS, Texas AG
88 LHC Group, Inc.LHC Group breach history 162,578Official total
  • Social Security number
  • Medical information
  • Financial account number
  • +4 more
 Washington AG, Texas AG, HHS
89 The Beacon Mutual Insurance CompanyThe Beacon Mutual Insurance Company breach history 162,439Official total
  • Social Security number
  • Medical information
  • Health insurance information
  • +1 more
 California AG, Texas AG
90 Oklahoma Tax CommissionOklahoma Tax Commission breach history 160,830Official total
  • Social Security number
  • Name
 California AG, Texas AG
91 Fiesta Insurance Franchise CorporationFiesta Insurance Franchise Corporation breach history 160,151Official total
  • Social Security number
  • Driver's license
  • Financial account number
  • +2 more
 California AG, Texas AG
92 City of Suffolk, VirginiaCity of Suffolk, Virginia breach history 157,725Official total
  • Social Security number
  • Financial account number
  • Name
 Texas AG
93 The Moody Bible Institute of ChicagoThe Moody Bible Institute of Chicago breach history 155,226Official total
  • Social Security number
  • Driver's license
  • Government ID number
  • +4 more
 California AG, Texas AG
94 One Medical Group, Inc.One Medical Group, Inc. breach history 153,174Official total
  • Medical information
 HHS
95 Madera Community HospitalMadera Community Hospital breach history 150,810Official total
  • Medical information
 HHS, California AG
96 Greenberg Traurig, LLP (“GT”)Greenberg Traurig, LLP breach history 150,000Official total
  • Social Security number
  • Date of birth
  • Name
  • +1 more
 California AG, Texas AG
97 Operation PAR, Inc.Operation PAR, Inc. breach history 145,714Official total
  • Medical information
 HHS
98 Laurel Eye ClinicLaurel Eye Clinic breach history 145,221Official total
  • Medical information
 HHS
99 Innovative Scientific Solutions, LLCInnovative Scientific Solutions, LLC breach history 143,842Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +3 more
 HHS, Texas AG
100 Mercer Advisors Inc.Mercer Advisors Inc. breach history 143,104Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +9 more
 Washington AG, California AG, Texas AG

Other years

People affected is the official total from a filing, or “At least” the sum of state filings where no total was filed. Spotted an error? Report a correction.