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

Largest data breaches of 2025

The 44 data breaches first reported in 2025 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 1–44 of 44

# Organization First filed People affected Information exposed Filed with
1 Conduent Business Services, LLCConduent Business Services, LLC breach history 62,486,662Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +5 more
 HHS, California AG, Washington AG, Texas AG
2 Aflac IncorporatedAflac Incorporated breach history 22,653,844Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +6 more
 California AG, Texas AG
3 Aflac Incorporated (“Aflac”)Aflac Incorporated breach history 13,924,906Official total
  • Medical information
 HHS
4 Prosper Marketplace, IncProsper Marketplace, Inc breach history 13,076,476Official total
  • Social Security number
  • Government ID number
  • Financial account number
  • +3 more
 Washington AG, California AG, Texas AG
5 Episource, LLCEpisource, LLC breach history 6,725,572Official total
  • Social Security number
  • Medical information
  • Health insurance information
  • +3 more
 Washington AG, HHS, California AG, Texas AG
6 700Credit, LLC700Credit, LLC breach history 5,836,521Official total
  • Social Security number
  • Date of birth
  • Name
  • +1 more
 Washington AG, California AG, Texas AG
7 Blue Shield of CaliforniaBlue Shield of California breach history 4,700,000Official total
  • Medical information
 HHS, California AG
8 University of Phoenix, Inc.University of Phoenix, Inc. breach history 3,489,274Official total
  • Social Security number
  • Financial account number
  • Date of birth
  • +2 more
 Washington AG, California AG, Texas AG
9 Columbia UniversityColumbia University breach history 3,067,242Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +7 more
 Washington AG, California AG, Texas AG
10 DaVita Inc.DaVita Inc. breach history 2,689,826Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +4 more
 Washington AG, HHS
11 Veradigm LLCVeradigm LLC breach history 2,672,036Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +6 more
 Washington AG, California AG, Texas AG
12 Veradigm LLCVeradigm LLC breach history 2,672,036Official total
  • Medical information
 HHS, California AG
13 Anne Arundel DermatologyAnne Arundel Dermatology breach history 1,905,000Official total
  • Medical information
 HHS, California AG
14 Radiology Associates of Richmond, Inc.Radiology Associates of Richmond breach history 1,419,091Official total
  • Social Security number
  • Medical information
  • Financial account number
  • +3 more
 Washington AG, HHS, California AG
15 Farmers Insurance Exchange, Farmers Group, Inc. (its attorney-in fact), and their subsidiaries and affiliatesFarmers Insurance Exchange, Farmers Group, Inc. , and their subsidiaries and affiliates breach history 1,071,300Official total
  • Driver's license
  • Date of birth
  • Name
  • +1 more
 California AG, Texas AG
16 People's Community ClinicPeople's Community Clinic breach history 700,000Official total
  • Social Security number
  • Medical information
  • Health insurance information
  • +3 more
 Texas AG, HHS
17 Marquis Software SolutionsMarquis Software Solutions breach history At least 624,062Sum of state filings
  • Social Security number
  • Financial account number
  • Date of birth
  • +2 more
 Washington AG, Texas AG, California AG
18 The University of PennsylvaniaThe University of Pennsylvania breach history 442,500Official total
  • Social Security number
  • Financial account number
  • Name
  • +1 more
 Washington AG, California AG, Texas AG
19 VITAS Hospice Services, LLCVITAS Hospice Services, LLC breach history 319,177Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +4 more
 California AG, Texas AG, HHS
20 CareNexa, LLC, dba Molecular Testing Labs (“MTL”)CareNexa, LLC breach history 258,874Official total
  • Social Security number
  • Medical information
  • Address
 California AG, Texas AG
21 Outcomes One, Inc.Outcomes One, Inc. breach history 256,031Official total
  • Medical information
  • Health insurance information
  • Name
 Washington AG, HHS, California AG, Texas AG
22 Sax LLPSax LLP breach history 228,876Official total
  • Social Security number
  • Driver's license
  • Government ID number
  • +1 more
 California AG, Texas AG
23 Activehours, Inc. d/b/a EarnInActivehours, Inc. breach history 202,480Official total
  • Social Security number
  • Date of birth
  • Name
  • +2 more
 Washington AG, Texas AG
24 Payactiv, Inc.Payactiv, Inc. breach history 202,194Official total
  • Social Security number
  • Date of birth
  • Name
 Washington AG, California AG, Texas AG
25 Modernizing Medicine, Inc.Modernizing Medicine, Inc. breach history 198,795Official total
  • Medical information
 HHS
26 Delta Dental of VirginiaDelta Dental of Virginia breach history 145,918Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +6 more
 Texas AG, HHS, California AG
27 WEL Companies, Inc.WEL Companies, Inc. breach history 122,960Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +5 more
 Washington AG, California AG, Texas AG
28 CNHI, LLCCNHI, LLC breach history 117,049Official total
  • Social Security number
  • Driver's license
  • Government ID number
  • +2 more
 California AG, Texas AG
29 Dartmouth CollegeDartmouth College breach history 98,990Official total
  • Social Security number
  • Financial account number
  • Date of birth
  • +1 more
 Washington AG, California AG, Texas AG
30 CPAP Medical Supplies and Services Inc.CPAP Medical Supplies and Services Inc. breach history 90,133Official total
  • Social Security number
  • Medical information
  • Financial account number
  • +3 more
 Washington AG, HHS, California AG
31 Healthcare Interactive, Inc.Healthcare Interactive, Inc. breach history 87,565Official total
  • Social Security number
  • Medical information
  • Health insurance information
  • +3 more
 California AG, Texas AG, Washington AG
32 Discord Inc.Discord Inc. breach history 74,729Official total
  • Driver's license
  • Government ID number
  • Date of birth
  • +2 more
 California AG, Texas AG
33 Anchorage Neighborhood Health CenterAnchorage Neighborhood Health Center breach history 70,555Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +4 more
 HHS, California AG, Texas AG, Washington AG
34 Parexel International, LLC (“Parexel”)Parexel International, LLC breach history 65,587Official total
  • Social Security number
  • Financial account number
  • Date of birth
  • +1 more
 Texas AG, California AG
35 SSL and ACL and their current and former affiliatesSSL and ACL and their current and former affiliates breach history 57,253Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +2 more
 California AG, Texas AG
36 Brevard Skin and Cancer CenterBrevard Skin and Cancer Center breach history 54,570Official total
  • Medical information
 HHS
37 Baker UniversityBaker University breach history 53,624Official total
  • Social Security number
  • Medical information
  • Government ID number
  • +3 more
 California AG, Texas AG
38 Rockrose Development L.L.C.Rockrose Development L.L.C. breach history 47,392Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +4 more
 Texas AG, California AG
39 Southern Graphics Inc.Southern Graphics Inc. breach history 31,480Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +6 more
 California AG, Texas AG
40 Susan B. Allen Memorial HospitalSusan B. Allen Memorial Hospital breach history 11,866Official total
  • Medical information
 HHS
41 Inotiv, Inc.Inotiv, Inc. breach history 10,482Official total
  • Social Security number
  • Medical information
  • Driver's license
  • +7 more
 California AG, Texas AG
42 Albany College of Pharmacy and Health SciencesAlbany College of Pharmacy and Health Sciences breach history At least 3,245Sum of state filings
  • Social Security number
  • Medical information
  • Driver's license
  • +3 more
 Washington AG, California AG
43 Eisner Advisory Group LLCEisner Advisory Group LLC breach history At least 2,121Sum of state filings
  • Social Security number
  • Medical information
  • Driver's license
  • +5 more
 Washington AG, California AG
44 Finastra Technology, Inc.Finastra Technology, Inc. breach history At least 679Sum of state filings
  • Social Security number
  • Date of birth
  • Name
 Washington AG, California 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.