HackingTechnologyInformationCustomer Data InvolvedIdentity (basic)Government IDMediumContained

De Gruyter Brill, Inc

bd_455f45ef52b1b583 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 4, 2026

Filed

Mar 9, 2026

To disclose

5 weeks

Affected · nationwide

2632 in this filing

Linked

6 filings

Confidence

66%

Full breach record for De Gruyter Brill, Inc →

De Gruyter Brill, Inc. reported an external system breach (hacking) on February 4, 2026, affecting 263 individuals, including 2 Maine residents. Compromised data included names, addresses, dates of birth, and W-9/1099 forms. The company notified law enforcement and offered 24 months of credit monitoring via IDX.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Feb 4, 2026 → Filed with AG Mar 9, 202633d ⏱ ME AG >30d5 weeks discovery → filing

⚠ occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Incident timeline

discovery → filing · 5 weeks / 33 days

Feb 4, 2026

Begins

Feb 4, 2026

Discovered

Mar 9, 2026

Filed

vs. sector median

14 wks faster

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)

Leak Siteplaybd_418d8a094ba8d25a2026-02-04 · +33dVerified by operator
Leak Siteplaybd_a35b4b53d97c16082026-01-31 · +37dVerified by operator

Regulatory filings (3) · sorted by filing gap

Massachusetts State AGbd_bca15fe1e786306a2026-03-09Verified by operator
New Hampshire State AGbd_de408cbc36b2697a2026-03-09Verified
Indiana State AGbd_717b85126fa22b832026-03-10 · +1dVerified by operator

Name: De Gruyter Brill, Inc
norm: de gruyter brill
Domain: degruyterbrill.com

Name: De Gruyter Brill, Inc
norm: de gruyter brill
Domain: degruyterbrill.com
Industry: Technologyllm

Discovered: Feb 4, 2026
Breach occurred: Feb 4, 2026
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 10, 2026
Affected individuals: 263state + nationwide
Data types: Identity (basic)Government ID
Data elements: Date of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: External
Regulator citations: Notified local police and the FBI
Initial access: exploit_public_facing

During the incident: Notified local police and the FBI
Offering identity theft protection services through IDX
Changes made: Working to improve security, mitigate risk and protect from further unauthorized access
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(33 days from discovery to filing)
Compliance flags: ME AG >30d · 33dLeak >30d
Discovery-date grounding: occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Feb 4, 2026
→ Filed with AG: Mar 9, 2026
33d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Feb 4, 2026 → Filed with AG: Mar 9, 2026	33d	30 days (soft)	ME AG >30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Massachusetts State AGMar 9 · first

New Hampshire State AGMar 9 · first

Maine 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.

Source URL: https://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/e1e39816-f492-4871-9ad3-a561793e3186.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 9, 2026
Raw hash: 547c63beb189a33d1ef33f4fdc3b0e93622bfccef68bfc0acfb64120daa16605

Linked disclosures

Ransomware claims (2)

Regulatory filings (3) · sorted by filing gap

Reporting entityDe Gruyter Brill, Inc

Victim entityDe Gruyter Brill, Inc

Incidentdiscovered Feb 4, 2026

Stated responseNotified local police and the FBI

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov