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Illinois Data Breaches — Page 3
Browse data breaches affecting Illinois residents in 2026. Stay informed about security incidents and protect your personal information.
Showing 10 breaches affecting Illinois
Walgreen Co.
Discovered Jul 14, 2025
Walgreen Co. experienced a data breach in 2025 involving the protected health information of 2,708 individuals in Illinois.
You may be entitled to compensation
The Washington Post
Discovered Jul 10, 2025
The Washington Post experienced a regulator-confirmed data breach in 2025 involving unauthorized access to its Oracle E-Business Suite environment. State filings report 9,720 affected individuals, with potentially exposed information including Social Security numbers, financial account data, medical information, and health insurance information.
You may be entitled to compensation
WEL Companies, Inc.
Discovered Jan 30, 2025
WEL Companies, Inc. experienced a data breach in 2025 where personally identifiable employment and regulatory data of 122,960 individuals were reportedly exposed.
You may be entitled to compensation
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.
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.
Trinity Health
Discovered Oct 1, 2023
Trinity Health experienced a potential data breach in March 2026, which may have exposed patient identifiers and clinical information.
You may be entitled to compensation
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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