HackingManufacturingIdentity (basic)Government IDPIIMediumContained

Diamond Chemical Co, LLC

bd_0f61c03452e26218 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

May 5, 2026

To disclose

—

Affected

5state residents only

Linked

5 filings

Confidence

68%

Full breach record for Diamond Chemical Co, LLC →

Diamond Chemical Co, LLC reported a data security event in Massachusetts involving unauthorized access to customer information. The breach impacted names and other personal data. The company notified law enforcement and state regulators, engaged in remediation reviews, and provided 24 months of complimentary credit monitoring via Kroll to affected individuals.

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Incident timeline — partial

? — ?

Breach window unknown

May 5, 2026

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

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

New Hampshire State AGbd_22c10446cef5bf092026-05-05Verified
Maine State AGbd_307f772b015554692026-05-05Verified
Vermont State AGbd_8ccfe8ade1a101ad2026-05-05Verified
Indiana State AGbd_b3fb986e92f2d2672026-05-05Verified

Name: Diamond Chemical Co, LLC
norm: diamond chemical

Name: Diamond Chemical Co, LLC
norm: diamond chemical

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 5state-resident count only
Data types: Identity (basic)Government IDPII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified the appropriate state regulators
Initial access: valid_credentials

During the incident: Notified law enforcement
Offering of credit monitoring for twenty-four (24) months through Kroll
Changes made: Reviewing protocols, policies, and procedures in an attempt to reduce the likelihood of a similar event reoccurring
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

New Hampshire State AGMay 5 · first

Maine State AGMay 5 · first

Vermont State AGMay 5 · first

Indiana State AGMay 5 · first

Massachusetts 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.mass.gov/doc/2026-702-diamond-chemical-co-llc/download
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: 1d5781000e392347d1c085bd8367a34895d66b3561393e1637e52093f32585fd

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityDiamond Chemical Co, LLC

Victim entityDiamond Chemical Co, LLC

IncidentUnauthorized Access

Stated responseNotified law enforcement

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov