BreachCensus

Massachusetts Mutual Life Insurance Company

United States of America

Massachusetts Mutual Life Insurance Company is an organisation in California. It appears on the Massachusetts Attorney General breach-notification register, the California Attorney General breach-notification register and the Vermont Attorney General breach-notification register with 9 confirmed incidents (10 filings); the most recent notice was filed on May 5, 2026.

Data as of September 16, 2026.

Confirmed incident

Filed in MA and VT

The same incident was filed separately with 2 jurisdictions within a few days of each other (MA and VT) — shown here as one incident.

Disclosed
May 5, 2026

Timeline

  1. May 4, 2026
    Reported to regulator Regulator

    VT AG breach notification: 1 Vermont residents affected

    source
  2. May 5, 2026
    Reported to regulator Regulator

    MA AG breach notification: 41 Massachusetts residents affected

    source
What a Massachusetts notice means

Governed by M.G.L. c. 93H. Notice to the Attorney General is required for a breach affecting any number of Massachusetts residents' personal information -- the statute sets no minimum count.

Note: the count is Massachusetts residents only, not a total.

Massachusetts breach-notification register ↗

What a Vermont notice means

Governed by 9 V.S.A. §2435. Notification to the Attorney General is required.

Note: the count is Vermont residents.

Vermont breach-notification register ↗

Confirmed incident

US-MA

Disclosed
December 4, 2025

Timeline

  1. December 4, 2025
    Reported to regulator Regulator

    MA AG breach notification: 56 Massachusetts residents affected

    source
Confirmed incident

US-CA

Occurred
October 29, 2023
Disclosed
March 21, 2024

Timeline

  1. March 21, 2024
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
What a California notice means

Governed by Cal. Civ. Code §1798.82. A copy of the notification must be sent to the Attorney General when a single breach requires notifying more than 500 California residents.

Note: no affected-count is published on this register.

California breach-notification register ↗

Confirmed incident

US-CA

Occurred
August 17, 2017
Disclosed
August 29, 2017

Timeline

  1. August 29, 2017
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
Confirmed incident

US-CA

Occurred
December 3, 2013
Disclosed
December 16, 2013

Timeline

  1. December 16, 2013
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
Confirmed incident

US-CA

Occurred
September 13, 2013
Disclosed
October 4, 2013

Timeline

  1. October 4, 2013
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
Confirmed incident

US-CA

Occurred
May 8, 2013
Disclosed
June 4, 2013

Timeline

  1. June 4, 2013
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
Confirmed incident

US-CA

Occurred
January 30, 2013
Disclosed
March 6, 2013

Timeline

  1. March 6, 2013
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
Confirmed incident

US-CA

Occurred
July 13, 2012
Disclosed
July 31, 2012

Timeline

  1. July 11, 2012
    Litigation filed Court

    RECAP docket 1:12-cv-11280 (mad): Bacchi v. Massachusetts Mutual Life Insurance Company

    source
  2. July 31, 2012
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source

Litigation