Mercadien P.C., CPAs data breach
Mercadien P.C., CPAs appears in 5 breach notices filed with California AG, Oregon DOJ and New Hampshire DOJ, most recently reported on October 20, 2026.
Also listed as: Mercadien, P.C. CPAs
Breach notices filed with regulators
| Reported | Filed with | Breach date(s) | People affected | Data involved | Source |
|---|---|---|---|---|---|
| Oct 20, 2026 | California AG | Sep 17, 2025 | Not listed | Not listed | Notice ↗ |
| Oct 12, 2026 | California AG | Not listed | Not listed | Not listed | Notice ↗ |
| Oct 12, 2026 | Oregon DOJ | Sep 17, 2025 – Oct 9, 2025 | 0 Oregon residents | Not listed | Oregon DOJ list ↗ |
| Oct 12, 2026 | New Hampshire DOJ | Not listed | Not listed | Not listed | Notice ↗ |
| Jul 20, 2026 | New Hampshire DOJ | Not listed | Not listed | Not listed | Notice ↗ |
Each row is a notice as published by the agency. For state lists, the number affected counts only that state's residents; HHS lists the total reported. SEC rows are Form 8-K Item 1.05 filings, which usually don't give a count. A notice does not mean a settlement exists, and a settlement may cover a different incident than a given notice.
Is there a settlement?
We don't track an open class-action settlement for Mercadien P.C., CPAs right now. Settlements usually come months or years after a breach. Get an email when new settlements are announced.
What you can do now
- Read the notice letter if you got one. It says what data was involved and may offer free credit monitoring with an enrollment deadline.
- Consider a free credit freeze at Equifax, Experian and TransUnion, especially if your Social Security number was involved.
- Change reused passwords and turn on two-factor authentication.
- Watch your bank, card and insurance statements for activity you don't recognize.
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