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Confirmed breach

Main Electric Supply Company, LLC (“MES”) data breach

USUnited States

Main Electric Supply Company, LLC (“MES”) (United States) notified the California Attorney General of a data breach on 12 September 2025. The breach began on 22 July 2025, 52 days before it was reported.

Status
Confirmed breach
People affected
Not reported yet
Reported
12 September 2025
Breach began
22 July 2025
Time to tell
52 days (the median in California’s notices over the last year: 154 days)

What was exposed

The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.

Before the notice: the ransomware gang Sinobi named Main Electric Supply Company, LLC (“MES”) on its leak site on 8 August 2025, 35 days before this was reported. Matched by the organisation’s name: the notice itself does not say who the attacker was.

Sources

Official notices are read by code from the regulator’s own register. More notices to California. · Corrections and changes

If Main Electric Supply Company, LLC (“MES”) had your data

  1. Look for Main Electric Supply Company, LLC (“MES”)’s own notice or letter: it should say what of yours was involved. Keep it.
  2. The register’s list does not say what was exposed; the notice it links to (under Sources) usually does. If Main Electric Supply Company, LLC (“MES”) has a password of yours, change it now to be safe.
  3. Expect scams that use your details: calls, texts or emails pretending to be Main Electric Supply Company, LLC (“MES”), your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

One email to confirm first. We use your address only for this alert, and one click deletes it.

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From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.