HackingManufacturingManufacturingData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Diamond Chemical Co, LLC

bd_307f772b01555469 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 2, 2025

Filed

May 5, 2026

To disclose

35 weeks

Affected

1state residents only

Linked

5 filings

Confidence

66%

Full breach record for Diamond Chemical Co, LLC →

Diamond Chemical Co, LLC reported an external system breach (hacking) occurring between July 26, 2025, and September 2, 2025. The incident involved unauthorized access and file copying, affecting one Maine resident's name and Social Security Number. The company notified law enforcement, engaged third-party specialists, and provided 12 months of credit monitoring through Kroll.

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Maine clockDiscovered Sep 2, 2025 → Filed with AG May 5, 2026245d ✗ ME AG >90d35 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 38 days

discovery → filing · 35 weeks / 245 days

Jul 26, 2025

Begins

Sep 2, 2025

Discovered

May 5, 2026

Filed

vs. sector median

+24 wks slower

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Massachusetts State AGbd_0f61c03452e262182026-05-05Candidate
New Hampshire State AGbd_22c10446cef5bf092026-05-05Verified
Vermont State AGbd_8ccfe8ade1a101ad2026-05-05Verified
Indiana State AGbd_b3fb986e92f2d2672026-05-05Verified

Name: Diamond Chemical Co, LLC
norm: diamond chemical
Domain: diamondchem.com
Industry: Other Commercial

Name: Diamond Chemical Co, LLC
norm: diamond chemical
Domain: diamondchem.com
Industry: Other Commercial
Industry: Manufacturingllm

Discovered: Sep 2, 2025
Breach occurred: Jul 26, 2025 – Sep 2, 2025
Undetected for: 38 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 5, 2026
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Providing written notice of this incident to relevant state and federal regulators
Initial access: exploit_public_facing

During the incident: Began an investigation with the assistance of third-party specialists
Moved quickly to limit the suspicious activity
Notified federal law enforcement regarding the event
Changes made: Reviewing its protocol, policies, and procedures in an attempt to reduce the likelihood of a similar event reoccurring
Providing access to credit monitoring services for twelve (12) months, through Kroll
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 35 weeks(245 days from discovery to filing)
Compliance flags: ME AG >90d · 245dME resident >60d · 245d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Sep 2, 2025
→ Filed with AG: May 5, 2026
245d 90 days ME AG >90d
Maine
Discovered: Sep 2, 2025
→ Notified: May 5, 2026
245d 60 days (analyst band; statutory cap is 30 days) ME resident >60d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Sep 2, 2025 → Filed with AG: May 5, 2026	245d	90 days	ME AG >90d
Maine	Discovered: Sep 2, 2025 → Notified: May 5, 2026	245d	60 days (analyst band; statutory cap is 30 days)	ME resident >60d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Massachusetts State AGMay 5 · first

New Hampshire State AGMay 5 · first

Vermont State AGMay 5 · first

Indiana State AGMay 5 · first

Maine State AGMay 5 · first · this page

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/aeaff3dd-331f-4833-8830-f13ccdd99e3b.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 5, 2026
Raw hash: 837a6b0adc20738572349c81c20ce98215e515c22ac6bf0595f1be85bbb35639

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityDiamond Chemical Co, LLC

Victim entityDiamond Chemical Co, LLC

Incidentdiscovered Sep 2, 2025

Stated responseBegan an investigation with the assistance of third-party specialists

ComplianceME AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov