DisclosureLens
HackingProfessional ServicesProfessional ServicesCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumResolved

De Gruyter Brill, Inc

bd_bca15fe1e786306a · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Mar 9, 2026

To disclose

—

Affected

97state residents only

Linked

6 filings

Confidence

65%
Full breach record for De Gruyter Brill, Inc →

De Gruyter Brill, Inc. notified Massachusetts residents that an unknown intruder gained access to its computer system on February 4, 2026. Compromised data included names, addresses, dates of birth, and tax documents (W-9s and 1099s). The company notified law enforcement and is offering identity theft protection services.

Leak gap clock⏱ Leak >30d
⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Incident timeline

Feb 4, 2026

Begins

Mar 9, 2026

Filed

This filing is one of 6 about the same incident.View merged incident
A leak claim by play about this victim predates this filing by 37 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (2)

Regulatory filings (3) · sorted by filing gap

Filing propagation · 4 filings · 4 states

View merged incident ↗
Maine State AGMar 9 · first
New Hampshire State AGMar 9 · first
Massachusetts State AGMar 9 · first · this page
Indiana State AG+1d

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.