Clustered 6 filings across 6 jurisdictions · filing window Dec 31, 2025 → Feb 24, 2026. View entity profile → Other incidents for this victim →
incident inc_3fe25aaa07ba4c3f · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
DE IN ME NH SC TX
Time between earliest and latest filing
Not recorded for this incident
Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Sep 17, 2025
When the intrusion reportedly occurred, per the linked filings
Nov 7, 2025
Reported by MAINE AG, NEW HAMPSHIRE AG, TEXAS AG filings
Mercadien PC Certified Public Accountants, a professional services firm, reported an external system breach (hacking) that occurred on September 17, 2025. The breach was discovered on November 7, 2025. The company began notifying an undetermined number of affected Maine residents on December 1, 2025.
Mercadien PC, a CPA firm, notified the New Hampshire Department of Justice of a data security incident discovered on November 7, 2025. Unauthorized access occurred between September 17 and October 9, 2025. The investigation is ongoing, and the number of affected individuals is currently unknown. Law enforcement was notified, and forensic experts are engaged. Remediation includes password resets and deploying SentinelOne.
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.
Mercadien PC Certified Public Accountants reported a data breach to the Indiana Attorney General. The breach occurred on 2025-09-17 and was reported on 2026-02-17. 69 Indiana residents were affected. 402,741 individuals affected in total.
Affected (this filing): 402,741
Mercadien PC, a Delaware CPA firm, disclosed a cybersecurity incident involving unauthorized access to customer records. The breach exposed personally identifiable information, including Social Security numbers and names. The firm is offering 12 months of credit monitoring and advising affected individuals on IRS Identity Protection PINs. The investigation is ongoing.
South Carolina state AG breach notice filed by Mercadien PC Certified Public Accountants. The document is a standard consumer notification letter providing guidance on fraud alerts, credit freezes, and identity protection PINs. It does not contain specific details regarding the nature of the breach, the date of discovery, the number of affected individuals, or the types of data compromised.
Mercadien PC Certified Public Accountants based in Hamilton Township, New Jersey, a financial services entity reported a data breach to the Texas Attorney General. The breach was discovered on 2025-11-07 and reported on 2026-02-24. 1,323 Texas residents were affected. 402,741 individuals affected in total. Types of information involved: Name of individual;Financial Information (e.g. account number, credit or debit card number). Consumers were notified via U.S. Mail.
Affected (this filing): 1,323