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Wisconsin Data Breaches — Page 2
Browse data breaches affecting Wisconsin residents in 2026. Stay informed about security incidents and protect your personal information.
Showing 7 breaches affecting Wisconsin
Southeast Series of Lockton Companies, LLC
Discovered Nov 20, 2024
The Southeast Series of Lockton Companies, LLC data breach was discovered on November 20, 2024, and regulator records identify the incident as affecting approximately one million people. Reported data types include names, dates of birth, Social Security numbers, health information, and medical information.
You may be entitled to compensation
Centers for Medicare & Medicaid Services
Discovered Nov 5, 2024
A data incident involving Medicare.gov accounts operated by the Centers for Medicare & Medicaid Services (CMS) may have impacted approximately 103,000 Medicare beneficiaries, not Aetna, with notifications sent in 2023 or 2024.
EMPIRE Distribution Inc.
Discovered Oct 21, 2024
Conduent Business Services, a vendor for The Empire Plan, experienced a data breach discovered in January 2025, impacting over 62 million individuals.
Healthcare Services Group, Inc
Discovered Sep 1, 2024
Healthcare Services Group, Inc. experienced a data breach in 2024 that impacted over 624,000 individuals across 48 U.S. states.
You may be entitled to compensation
Landmark Admin, LLC
Discovered May 13, 2024
Landmark Admin, LLC experienced a 2024 data breach affecting approximately 1.6 million people. Reported exposed information included Social Security numbers and financial information; the incident involved Landmark Admin’s administration of information for Liberty Bankers Insurance Group and Accendo Insurance Company.
Medusind, Inc.
Discovered Dec 29, 2023
Medusind, Inc. experienced a regulator-confirmed data breach on December 29, 2023, involving personal, medical, insurance, payment, and government-identification information. The number of affected individuals has not been publicly identified in the sources reviewed.
Hospital Sisters Health System
Discovered Aug 16, 2023
Hospital Sisters Health System experienced a regulator-confirmed data breach beginning August 16, 2023, involving accessed files that may have contained personal and health information. The number of affected individuals has not been publicly disclosed in the sources reviewed.
You may be entitled to compensation
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