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Data breach cases: companies starting with M
77 cases. Amounts are what the settlement paid at most per person, or the size of the fund when no per-person figure was published.
- Macys$1,500closed April 6, 2020
- Magellan Health$1,430,000closed December 15, 2022
- Magmutualbeing investigated
- Manatee County Florida School District Employee$500closed October 18, 2019
- Mankato Clinicbeing investigated
- Mapco Express$500closed January 26, 2017
- Marietta Health$5,050closed October 15, 2023
- Marinemax$7,000closed June 13, 2025
- Marriott$52 milliontotal fund
- Marshall Melhorn$5,070closed December 23, 2024
- Marymount Manhattan College$8,250closed August 15, 2023
- Mason Tenders District Council$2,950closed October 3, 2023
- Maxim Healthcare Services$5,000closed July 24, 2023
- Mcewen And Associatesbeing investigated
- Mcg Health$11,500closed September 30, 2024
- Mcgrath Rentcorp$5,500closed November 6, 2023
- Mckenzie Memorial Hospitalin litigation
- Mckesson Corporation in our checkbeing investigated
- Mclaren Health Care$14 milliontotal fund
- Mclaren Health Care Corp$5,000closed April 26, 2026
- Mclean Mortgage Corporationin litigation
- Mcleod Healthbeing investigated
- Mcpherson Hospital$5,400closed January 29, 2025
- Med Data$5,000closed May 21, 2024
- Medevolvebeing investigated
- Mediant Communications$10,000closed November 21, 2022
- Medical Arts Chemists And Surgicalsbeing investigated
- Medical Associates Of Brevard Llc$1,500per person
- Medical Healthcare Solutions$5,150closed February 5, 2024
- Medical Review Institute Of America$700closed July 20, 2023
- Medimpact Healthcare Systemsbeing investigated
- Medlink Georgiabeing investigated
- Medstar$3,080closed February 23, 2024
- Medusind$5,000closed December 29, 2025
- Medusind Inc$5 milliontotal fund
- Membersource Credit Unionbeing investigated
- Membersown Credit Unionbeing investigated
- Mental Health Associationin litigation
- Mercer University$5,950closed March 18, 2025
- Mercy Health$390closed June 10, 2024
- Meridian Health Plan Of Illinoisbeing investigated
- Mers Missouri Goodwill Industries$5,500closed July 7, 2025
- Methodist Hospitals$3,300closed October 6, 2022
- Metromile$5,000closed December 21, 2023
- Mgm Resorts in our check$15,000closed June 3, 2025
- Michigan Avenue Immediate Care$2,500closed August 3, 2023
- Midwest Spine And Brain Institutebeing investigated
- Mile Bluff Medical Centerbeing investigated
- Miles Partnershipbeing investigated
- Millennium Partners Managementbeing investigated
- Millstone Medical Outsourcingbeing investigated
- Mindpath Health$50closed January 5, 2026
- Minidoka Memorial Hospitalbeing investigated
- Minnesota Entbeing investigated
- Minnesota Epilepsy Groupbeing investigated
- Minted in our check$43closed September 16, 2021
- Mission Community Hospital$1,546,409total fund
- Mission Pet Healthbeing investigated
- Mizuno$5,000closed June 15, 2026
- Mizuno Usain litigation
- Mngi Digestive Health$2.8 milliontotal fund
- Mondelez$7,000closed February 10, 2025
- Montlick Associates Pc$1.3 milliontotal fund
- Moody Bible Institute in our checkbeing investigated
- Morgan Stanley$60 millionclosed August 11, 2022
- Morley Companies$4.3 millionclosed March 20, 2023
- Morris Hospital$5,000closed October 28, 2025
- Morrison Community Hospital$5,000closed February 5, 2025
- Morselife Health Systembeing investigated
- Motility Software Solutions$4,949,500total fund
- Mount Sinai Medical Center$20closed September 28, 2026
- Mt Baker Imaging And Northwest Radiologists$5,000closed August 19, 2026
- Mt Baker Imaging Northwest Radiologists$3.3 milliontotal fund
- Mu Health Care$150closed January 14, 2025
- Mulkay Cardiology Consultants$5,000closed February 22, 2025
- Murfreesboro Medical Clinic$500closed April 14, 2026
- Mystic Valley Elder Services$520,000total fund