Home › States › WisconsinWisconsin data breach notices 230 notices on file, filed under Wis. Stat. §134.98.
Governed by Wis. Stat. §134.98 . No state agency must be notified. Affected individuals must be told within 45 days, and the national credit bureaus too when 1,000 or more people are notified; DATCP lists breaches reported to it or found to affect Wisconsin consumers.
Note: the count is Wisconsin residents only when published, not a total; many notices do not include one.
Wisconsin breach-notification register ↗
Notices by year Year Notices 2026 3 2025 6 2024 9 2023 10 2022 9 2021 13 2020 7 2019 14 2018 24 2017 47 2016 18 2015 17 2014 21 2013 12 2012 7
Most recent notices Organization Reported Residents affected Wisconsin Department of Health Services 2026-06-30 8,157 Instructure, Inc. 2026-05-07 — Melzer's Fuel Service, Inc. 2026-02-26 1 700Credit, LLC 2025-11-21 87,947 University of Phoenix 2025-11-21 14,095 Engelson & Associates Ltd. 2025-04-25 — Conduent Business Services LLC 2025-01-22 — Powerschool 2025-01-07 — Green Bay Packers, Inc. 2025-01-06 — Insurance Agency Marketing Services, Inc. 2024-09-20 2,045 National Public Data 2024-08-12 6,410 Compex Legal Services 2024-07-24 109 First Choice Dental 2024-07-12 — Change Healthcare (CHC) a unit of UnitedHealthcare Group (UHG) 2024-06-20 — Power Test LLC 2024-06-13 975 Ascension 2024-05-09 — AT&T 2024-03-30 — Group Health Cooperative of South Central Wisconsin (GHC-SCW) 2024-02-09 — Advarra, Inc. 2023-11-01 278 Navvis & Company, LLC 2023-09-22 316,043 Medica Community Health; Dean Health Plan; & Dean Health Service Company (branded as WellFirst Health) 2023-07-21 540 HCA Healthcare 2023-07-10 4,600 University of Illinois 2023-05-02 1 Fortra 2023-04-07 21 Chippewa County Human Services 2023-04-05 842 New Glarus School District 2023-03-08 2,003 Fortra 2023-03-06 — T-Mobile 2023-01-19 — Emmaus Road Church 2022-12-07 180 Camping World / Good Sam 2022-11-07 — Metropolitan Associates 2022-11-07 16,888 APG Media Group of Southern Wisconsin, LLC 2022-10-25 4,415 Advocate Aurora Health 2022-10-21 — MMA Operations 2022-09-01 — RR Donnelly 2022-08-05 — Lakeview Loan Servicing, LLC 2022-01-31 — Horizon Actuarial Services, LLC 2022-01-13 271 ISO Claims Services, Inc. 2021-11-19 — PAL Card Minnesota, LLC (Pawn America) 2021-11-19 — Robinhood Markets, Inc. 2021-11-08 — Neiman Marcus Group LTD LLC 2021-09-30 — T-Mobile USA, Inc. 2021-08-16 — Forefront Dermatology 2021-07-08 — Progrexion ASG, Inc. 2021-06-16 — Volkswagen Group of America, Inc. 2021-06-11 — Arnoff Moving & Storage 2021-06-10 — Ultratec Inc. / Captel Inc. 2021-05-04 — GEICO - Government Employees Insurance Company 2021-04-09 — Flagstar Bank, FSB 2021-03-15 — The Kroger Co. 2021-02-19 —
Top organizations by notices Organization Notices T-Mobile USA, Inc. 3 Advocate Aurora Health 2 AT&T 2 Fortra 2 Medical College of Wisconsin 2 Office of Personnel Management 2 UnityPoint Health 2 UW Health 2 Yahoo! Inc. 2 21st Century Oncology 1 5CA (a third-party service provider for Discord) 1 700Credit, LLC 1 A lere Home Monitorin g 1 Access Group Education Lending 1 ACTIVE Network, LLC 1 Adams County, WI 1 Adobe 1 Advanced Data Processing, Inc. (ADPI) 1 Advarra, Inc. 1 Allrecipes.com 1 American Airlines, Inc. 1 American Dairy Queen Corp. 1 Anthem, Inc. 1 Anthem, Inc./Launchpoint Ventures 1 APG Media Group of Southern Wisconsin, LLC 1 Arby's 1 Arnoff Moving & Storage 1 Ascension 1 Barron Area School District 1 bebe stores, inc. 1 Bed Bath & Beyond 1 Beer Capitol Distributing 1 Best Buy Co, Inc. 1 Blackbaud, Inc. 1 BMO Harris Bank 1 Briggs & Stratton 1 Brooks Brothers 1 Bruegger’s Bagels 1 Brunswick Corporation, DBA Mercury Marine 1 CafePress, Inc. 1 Camping World / Good Sam 1 Canyon Bakehouse, LLC 1 Capital First Trust Company 1 Capital One 1 Caribou Coffee Co. 1 Change Healthcare (CHC) a unit of UnitedHealthcare Group (UHG) 1 Charge Anywhere LLC 1 Chipotle 1 Chippewa County Human Services 1 Cloudflare 1
Questions and answers How many Wisconsin breach notices are on file? 230 notices are on file for Wisconsin, tied to a confirmed, visible incident on Breach Census.
When does the Wisconsin register on this site start? The earliest notice on file for Wisconsin on Breach Census was reported in 2012.
What does the affected-resident count mean for a Wisconsin notice? For a Wisconsin notice, the count is Wisconsin residents only when published, not a total; many notices do not include one.
Where do these Wisconsin notices come from? Notices are ingested directly from Wisconsin's own breach-notification register at https://datcp.wi.gov/Pages/Programs_Services/DataBreaches.aspx.