Where does the Stephen Mathias & Co case file come from?

Every entry is taken from the breach report Stephen Mathias & Co lodged with the Illinois 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.

Case file

Case File: Stephen Mathias & Co Data Breach

This file collects the dated facts on record for the Stephen Mathias & Co incident. The state report is dated June 4, 2026.

Timeline

June 4, 2026Report filed in IllinoisDate the notice was lodged with the Illinois Attorney General.

Case facts

Filing state: Illinois
Date reported: June 4, 2026
Receiving office: Illinois Attorney General

Case notes

Stephen Mathias & Co, a firm operating in Illinois, officially reported a data security incident to the state's Attorney General on June 4, 2026. This filing indicates that unauthorized access to systems containing personal information occurred, though specific details about the nature of the breach remain under investigation. The firm has stated it is actively looking into the scope and impact of the event.

The official report from Stephen Mathias & Co does not specify the exact type of security incident that took place or the precise categories of personal information that may have been exposed. Similarly, the number of individuals potentially affected by this incident has not been publicly disclosed in the filing. The date when the breach initially occurred is also currently unknown.

As a professional legal services firm, Stephen Mathias & Co handles a broad range of sensitive data in its operations. While the specific data involved in this incident is not detailed, any compromise of personal information can carry risks for those affected. Individuals who receive direct notification from Stephen Mathias & Co should review the provided information carefully.

In response to any data security incident, general precautions are recommended. Individuals should remain vigilant for any unusual activity across their online accounts and financial statements. It is advisable to be cautious of unsolicited communications, especially those requesting personal details, as these could be phishing attempts. Regularly reviewing account statements and credit reports can help detect any potential misuse of personal information.

This official filing with the Illinois Attorney General serves as a public record of the reported security event. Stephen Mathias & Co continues its investigation, and additional information may become available as their assessment progresses and as required by regulatory obligations.

Questions about this case file

Where does the Stephen Mathias & Co case file come from?: Every entry is taken from the breach report Stephen Mathias & Co lodged with the Illinois 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.

Illinois data breaches

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Timeline

Case facts

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