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Case File: Sentinel Security Life Insurance Company and Atlantic Coast Life Insurance Company Data Breach

This file collects the dated facts on record for the Sentinel Security Life Insurance Company and Atlantic Coast Life Insurance Company incident. The state report is dated December 30, 2025. The incident itself is dated April 7, 2025.

Timeline

267 days separate the incident date from the date it was reported.

  1. April 7, 2025Incident dateWhen the filing says the breach took place.
  2. December 30, 2025Report filed in MontanaDate the notice was lodged with the Montana Attorney General.

Case facts

Filing state
Montana
Date reported
December 30, 2025
Incident date
April 7, 2025
Receiving office
Montana Attorney General

Case notes

Sentinel Security Life Insurance Company and Atlantic Coast Life Insurance Company submitted a data breach notification to Montana authorities on December 30, 2025. This filing, made publicly available, indicates an incident that occurred on April 7, 2025, potentially involving sensitive personal information.

While the specific nature of the data breach and the number of individuals affected remain unspecified in the public record, the notification confirms that certain personal information was exposed. Both companies are currently investigating the full scope and impact of this security incident.

Individuals who receive a direct notification letter from Sentinel Security Life Insurance Company or Atlantic Coast Life Insurance Company should carefully review it. The letter will contain specific details relevant to their situation and any compromised information, as confirmed by the companies.

As a general precaution following any data exposure, it is advisable to remain vigilant against potential identity theft or fraud. This includes monitoring financial statements and credit reports for unusual activity, placing fraud alerts, and being cautious of unsolicited communications that might attempt to phish for additional personal details.

DataBreachCaseFile.com presents this information based strictly on official filings made by the companies with regulatory bodies. This summary serves to document the reported event as it appears in public records, providing a factual overview without speculation.

Questions about this case file

Where does the Sentinel Security Life Insurance Company and Atlantic Coast Life Insurance Company case file come from?
Every entry is taken from the breach report Sentinel Security Life Insurance Company and Atlantic Coast Life Insurance Company lodged with the Montana Attorney General. Nothing here is estimated.
Why do the incident date and the report date differ?
Companies usually investigate before they report. The gap between the two dates shows how long that took.
What does the records-affected figure count?
It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.
Does this case file change over time?
Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

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Filing source: Montana Attorney General