Massachusetts Mutual Life Insurance Company data breach
Massachusetts Mutual Life Insurance Company appears in 19 breach notices filed with Vermont AG, Indiana AG, Maryland AG, California AG and Montana DOJ, most recently reported on May 4, 2026.
Also listed as: Massachusetts Mutual Life Insurance Company ("MassMutual"); Massachusetts Mutual Life Insurance Company (MassMutual)
Breach notices filed with regulators
| Reported | Filed with | Breach date(s) | People affected | Data involved | Source |
|---|---|---|---|---|---|
| May 4, 2026 | Vermont AG | Not listed | 1 Vermont residents | Social Security NumbersHealth Records | Vermont AG list ↗ |
| May 1, 2026 | Indiana AG | Mar 2, 2025 | 2 Indiana residents | Not listed | Indiana AG list ↗ |
| Feb 13, 2026 | Indiana AG | Apr 7, 2025 | 14 Indiana residents | Not listed | Indiana AG list ↗ |
| Aug 15, 2024 | Maryland AG | Not listed | 11 Maryland residents | NameSocial Security numberDate of birthEmail addressAddressPhone number | Notice ↗ |
| Apr 26, 2024 | Maryland AG | Not listed | 18 Maryland residents | NameSocial Security numberDate of birthMedical informationAddress | Notice ↗ |
| Mar 21, 2024 | California AG | Oct 29, 2023 | Not listed | Not listed | California AG list ↗ |
| Mar 21, 2024 | Maryland AG | Not listed | 225 Maryland residents | NameSocial Security numberDate of birthAddress | Notice ↗ |
| Aug 10, 2023 | Maryland AG | Not listed | 1 Maryland residents | NameSocial Security number | Notice ↗ |
| Jul 20, 2023 | Maryland AG | Not listed | 2 Maryland residents | NameSocial Security numberDate of birthAddress | Notice ↗ |
| Apr 27, 2023 | California AG | Feb 1, 2023 | Not listed | Not listed | California AG list ↗ |
| Apr 27, 2023 | Montana DOJ | Feb 1, 2023 | 1 Montana residents | Not listed | Notice ↗ |
| Apr 26, 2023 | Maryland AG | Not listed | 11 Maryland residents | NameSocial Security numberFinancial account informationMedical information | Notice ↗ |
| Jun 4, 2019 | Montana DOJ | May 20, 2019 | 1 Montana residents | Not listed | Notice ↗ |
| Aug 29, 2017 | California AG | Aug 17, 2017 | Not listed | Not listed | California AG list ↗ |
| Dec 16, 2013 | California AG | Dec 3, 2013 | Not listed | Not listed | California AG list ↗ |
| Oct 4, 2013 | California AG | Sep 13, 2013 | Not listed | Not listed | California AG list ↗ |
| Jun 4, 2013 | California AG | May 8, 2013 | Not listed | Not listed | California AG list ↗ |
| Mar 6, 2013 | California AG | Jan 30, 2013 | Not listed | Not listed | California AG list ↗ |
| Jul 31, 2012 | California AG | Jul 13, 2012 | Not listed | Not listed | California AG list ↗ |
Each row is a notice as published by the agency. For state lists, the number affected counts only that state's residents; HHS lists the total reported. SEC rows are Form 8-K Item 1.05 filings, which usually don't give a count. A notice does not mean a settlement exists, and a settlement may cover a different incident than a given notice.
Is there a settlement?
We don't track an open class-action settlement for Massachusetts Mutual Life Insurance Company right now. Settlements usually come months or years after a breach. Get an email when new settlements are announced.
What you can do now
- Read the notice letter if you got one. It says what data was involved and may offer free credit monitoring with an enrollment deadline.
- Consider a free credit freeze at Equifax, Experian and TransUnion, especially if your Social Security number was involved.
- Change reused passwords and turn on two-factor authentication.
- Watch your bank, card and insurance statements for activity you don't recognize.
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