BreachCensus

The Northwestern Mutual Life Insurance Company

United States of America

The Northwestern Mutual Life Insurance Company is an organisation in Massachusetts. It appears on the Massachusetts Attorney General breach-notification register, the California Attorney General breach-notification register, the Washington State Attorney General breach-notification register and the Iowa Attorney General security breach notification list with 4 confirmed incidents (6 filings); the most recent notice was filed on February 29, 2024.

Data as of September 24, 2026.

Confirmed incident

Filed in IA, MA, WA and CA — Ransomware Attack

The same incident was filed separately with 4 jurisdictions within a few days of each other (IA, MA, WA and CA) — shown here as one incident.

Occurred
October 29, 2023
Disclosed
February 29, 2024

Timeline

  1. February 16, 2024
    Reported to regulator Regulator

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

    source
  2. February 29, 2024
    Reported to regulator Regulator

    MA AG breach notification: an unknown number of Massachusetts residents affected

    source
  3. February 29, 2024
    Reported to regulator Regulator

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

    source
  4. February 29, 2024
    Reported to regulator Regulator

    WA AG breach notification: 1,025 Washington residents affected

    source
  5. February 29, 2024
    Reported to regulator Regulator

    IA AG breach notification: an unknown number of Iowa residents affected

    source
  6. February 29, 2024
    Reported to regulator Regulator

    MA AG breach notification: 1,289 Massachusetts residents affected

    source
  7. June 27, 2024
    Reported to regulator Regulator

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

    source
What a Iowa notice means

Governed by Iowa Code §715C.2. Notice to the Attorney General is required within five business days of notifying consumers, for a breach requiring notification to more than 500 Iowa residents.

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

Iowa breach-notification register ↗

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 Washington notice means

Governed by RCW 19.255.010. Notice to the Attorney General is required when a breach affects more than 500 Washington residents.

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

Washington breach-notification register ↗

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-MA

Disclosed
February 16, 2024

Timeline

  1. February 16, 2024
    Reported to regulator Regulator

    MA AG breach notification: an unknown number of Massachusetts residents affected

    source
  2. February 16, 2024
    Reported to regulator Regulator

    MA AG breach notification: 475 Massachusetts residents affected

    source
Confirmed incident

US-MA

Disclosed
February 7, 2024

Timeline

  1. February 7, 2024
    Reported to regulator Regulator

    MA AG breach notification: 31 Massachusetts residents affected

    source
Confirmed incident

US-CA

Occurred
August 31, 2017
Disclosed
October 3, 2017

Timeline

  1. October 3, 2017
    Reported to regulator Regulator

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

    source