MalwareFinancial ServicesProfessional ServicesFinanceRansomwareData EncryptedTargetedGovernment IDIdentity (basic)CredentialsFinancial accountHealth (basic)BiometricHighContained

ARTHUR J. GALLAGHER & CO.

bd_4286fe2af33debe1 · schema v1 · pii pii-v1

Severity

High

Discovered

Sep 26, 2020

Filed

Jul 19, 2021

To disclose

42 weeks

Affected

14,638state residents only

Linked

41 filings

Confidence

64%

Full breach record for ARTHUR J. GALLAGHER & CO. →14 incidents on file

Arthur J. Gallagher & Co. reported a ransomware incident detected on September 26, 2020, affecting internal systems between June 3 and September 26, 2020. The breach compromised sensitive data including SSNs, driver's licenses, financial account info, medical records, and biometric data. The company engaged forensic specialists, notified law enforcement, and offered 24 months of credit monitoring.

J jump to incidentP pin to compareR raw source

South Carolina clock✓ SC CRA notice due42 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 · 115 days

discovery → filing · 42 weeks / 296 days

Jun 3, 2020

Begins

Sep 26, 2020

Discovered

Jun 30, 2021

Scope determined

Jul 19, 2021

Filed

vs. sector median

+34 wks slower

This filing is one of 41 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Delaware State AGbd_d559ecce5b3385332021-08-19 · +31dVerified by operator
New Hampshire State AGbd_7a32a3fe8539d6192021-08-23 · +35dVerified by operator
Maine State AGbd_a45fd1cf66fc40d52021-09-01 · +44dVerified by operator
New Hampshire State AGbd_e05a56a536c799dd2021-09-07 · +50dVerified by operator

Show 6 more filings ↓up to 144d gap

Maine State AGbd_c453899ab04861cb2021-09-08 · +51dVerified by operator
Maine State AGbd_29bb498af183cd332021-09-13 · +56dVerified by operator
Maine State AGbd_d79b29bc558a3c712021-09-29 · +72dVerified by operator
New Hampshire State AGbd_544b44357c05bc6c2021-10-04 · +77dVerified by operator
Maine State AGbd_2831d3281e5d09eb2021-12-06 · +140dCandidate
New Hampshire State AGbd_0995d36ed3507f492021-12-10 · +144dVerified

Showing first 10 of 40 linked disclosures.

Name: ARTHUR J. GALLAGHER & CO.
norm: arthur j gallagher

Name: ARTHUR J. GALLAGHER & CO.
norm: arthur j gallagher
Industry: Financial ServicesllmProfessional Servicesllm

Discovered: Sep 26, 2020
Breach occurred: Jun 3, 2020 – Sep 26, 2020
Undetected for: 115 daysoccurrence → discovery
Materiality determined: Jun 30, 2021
Notification sent: Jun 30, 2021
Affected individuals: 14,638state-resident count only
Data types: Government IDIdentity (basic)CredentialsFinancial accountHealth (basic)Biometric
Data elements: Social Security numberDate of birthMedical information
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Reported incident to law enforcement and regulatory authorities

During the incident: Took all systems offline as a precautionary measure
Initiated response protocols
Launched an investigation with the assistance of third-party cybersecurity and forensic specialists
Implemented business continuity plans
Reported the incident to law enforcement and regulatory authorities
Provided access to identity and credit monitoring services for twenty-four months through Kroll
Changes made: Reviewed existing security policies
Implemented additional measures and enhanced security tools
Implemented additional safeguards
Provided additional training to employees on data privacy and security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 42 weeks(296 days from discovery to filing)
Compliance flags: SC CRA notice due
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.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 4 states

View merged incident ↗

South Carolina State AGJul 19 · first · this page

Delaware State AG+31d

New Hampshire State AG+35d

Maine State AG+44d

New Hampshire State AG+50d

Maine State AG+51d

Maine State AG+56d

Maine State AG+72d

New Hampshire State AG+77d

Maine State AG+140d

New Hampshire State AG+144d

Pattern: first filing Jul 19 (SC), last Dec 10 (NH) — a 144-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 40 — the full spread may be wider.

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://consumer.sc.gov/sites/consumer/files/Documents/Business%20Resources%20Laws/Related%20Laws/Breaches/2021/ArthurJGallagher.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 19, 2021
Raw hash: b90df8dafb0c25323b858527a3add63dd8ff912c5cded082e44e9016345330fe

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityARTHUR J. GALLAGHER & CO.

Victim entityARTHUR J. GALLAGHER & CO.

Incidentdiscovered Sep 26, 2020

Stated responseTook all systems offline as a precautionary measure

ComplianceSC CRA notice due

Extraction provenanceno artifact recorded

Source provenanceconsumer.sc.gov