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Case File: Main Electric Supply Company, LLC (“MES”) Data Breach

This file collects the dated facts on record for the Main Electric Supply Company, LLC (“MES”) incident. The state report is dated September 12, 2025. The incident itself is dated July 22, 2025.

Timeline

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

  1. July 22, 2025Incident dateWhen the filing says the breach took place.
  2. September 12, 2025Report filed in CaliforniaDate the notice was lodged with the California Attorney General.

Case facts

Filing state
California
Date reported
September 12, 2025
Incident date
July 22, 2025
Receiving office
California Attorney General

Case notes

Main Electric Supply Company, LLC (MES) has submitted a filing in California concerning a data incident. The report indicates that an exposure involving personal information took place on July 22, 2025, although the specific nature of the breach and the types of data affected remain unspecified in the public record.

The company's filing, dated September 12, 2025, notes that the incident is actively under investigation. As such, further details about the scope or specifics of the compromised information have not been released at this time. This information is derived from public filings made with regulators.

While the exact categories of personal information involved are not yet known, data breaches typically carry a risk of unauthorized access to various sensitive details. Affected individuals should be aware of this potential and take general precautionary measures.

It is recommended that individuals whose data may have been involved remain vigilant for any unusual activity across their online accounts. This includes monitoring financial statements, credit card transactions, and any communications that seem suspicious or out of the ordinary.

Regularly reviewing your credit reports from the three major bureaus—Equifax, Experian, and TransUnion—is a prudent step to detect any unauthorized accounts or activity. You are entitled to a free copy of your credit report from each bureau annually.

Additionally, be wary of unsolicited emails, phone calls, or text messages that request personal information. These could be phishing attempts designed to exploit data that may have been exposed in a breach.

Questions about this case file

Where does the Main Electric Supply Company, LLC (“MES”) case file come from?
Every entry is taken from the breach report Main Electric Supply Company, LLC (“MES”) lodged with the California 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: California Attorney General