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Latest / California / March 2024

Massachusetts Mutual Life Insurance Company

Massachusetts Mutual Life Insurance Company notified California AG on Mar 21, 2024 of a data breach, which occurred on Oct 29, 2023. Data exposed: Social Security number.

All 9 filings by Massachusetts Mutual Life Insurance Company, state by state · Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization
Massachusetts Mutual Life Insurance Company
Source
California AG · source record
Date reported
Mar 21, 2024
Date(s) of breach
Sunday, October 29, 2023
Residents affected
Not published by this source
Data exposed
Social Security number
Notice letter
Sample notice (PDF)
Days to notice
144 days from the end of the breach window (Oct 29, 2023, no discovery date in the letter) to the California record (Mar 21, 2024). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
Offered in the letter
24 months of credit or identity monitoring through Experian
First seen by BreachTally
2026-10-30 15:41 UTC

Dates and counts as filed by the organization with the agency. The breach window and the report date often differ by months.

First seen by BreachTally at 15:41 UTC on Oct 30, 2026. New filings reach paid subscribers within 30 minutes of the agency posting, with the count, the data exposed and the letter. Start a 14-day free trial. We email you two days before the first charge and you cancel in one click.
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Other filings by Massachusetts Mutual Life Insurance Company

OrganizationSourceStateReportedResidents affectedData exposed
Massachusetts Mutual Life Insurance Company Massachusetts OCABR MA May 5, 2026 41 Social Security numberMedical / health informationFinancial / bank account
Massachusetts Mutual Life Insurance Company Vermont AG VT May 4, 2026 1 Social Security numberMedical / health information
Massachusetts Mutual Life Insurance Company California AG CA Aug 29, 2017 Not published Social Security numberFinancial / bank accountDate of birthPhone number+2
Massachusetts Mutual Life Insurance Company California AG CA Dec 16, 2013 Not published Social Security numberFinancial / bank accountDate of birthUsernames / passwords+4
Massachusetts Mutual Life Insurance Company California AG CA Oct 4, 2013 Not published In the letter (PDF)
Massachusetts Mutual Life Insurance Company California AG CA Jun 4, 2013 Not published Social Security numberFinancial / bank accountDate of birthUsernames / passwords+4
Massachusetts Mutual Life Insurance Company California AG CA Mar 6, 2013 Not published Social Security numberFinancial / bank accountMedical / health informationHealth insurance+4
Massachusetts Mutual Life Insurance Company California AG CA Jul 31, 2012 Not published Social Security numberFinancial / bank accountDate of birthUsernames / passwords+4

Data reproduced from a public government filing. Spot an error? Email support@breachtally.com with the record link. Corrections are applied and noted.