HackingProfessional ServicesProfessional ServicesData ExfiltratedCustomer Data InvolvedIdentity (basic)Financial accountHighContained

ARTHUR J. GALLAGHER & CO.

bd_a45fd1cf66fc40d5 · schema v1 · pii pii-v1

Severity

High

Discovered

Jun 23, 2021

Filed

Sep 1, 2021

To disclose

10 weeks

Affected · nationwide

111,317322 in this filing

Confidence

65%

Full breach record for ARTHUR J. GALLAGHER & CO. →31 incidents on file

Arthur J. Gallagher & Co. reported an external system breach (hacking) occurring on June 3, 2020, discovered on June 23, 2021. The incident affected 111,317 individuals, including 322 in Maine. Acquired data included names and financial account or credit/debit card numbers (with security codes/PINs). The company provided written notification on September 1, 2021, and offered 24 months of identity theft protection services via Kroll.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Jun 23, 2021 → Filed with AG Sep 1, 202170d ⏱ ME AG >30d10 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 385 days

discovery → filing · 10 weeks / 70 days

Jun 3, 2020

Begins

Jun 23, 2021

Discovered

Sep 1, 2021

Filed

vs. sector median

8 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed111,317 affectedView incident

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

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

Discovered: Jun 23, 2021
Breach occurred: Jun 3, 2020
Undetected for: 385 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 1, 2021
Affected individuals: 111,317state + nationwide
Data types: Identity (basic)Financial account
Data elements: Financial account number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: ExternalFinancial
Regulator citations: Filed data breach notice with Maine Attorney General
Initial access: exploit_public_facing

During the incident: Sent written notification to affected consumers
Offered 24 months of identity theft protection services through Kroll
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(70 days from discovery to filing)
Compliance flags: ME AG >30d · 70d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Jun 23, 2021
→ Filed with AG: Sep 1, 2021
70d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Jun 23, 2021 → Filed with AG: Sep 1, 2021	70d	30 days (soft)	ME AG >30d

Status: No extraction artifact recorded for this disclosure.

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-a1252b4f8318/20ff736e-3734-4e8b-ba37-6e4936bf1b7e.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 1, 2021
Raw hash: cddf3c27292d60b7e3cef6afba6eb1e8fcfaaa348465f14305c701ad1097a4d8

Reporting entityARTHUR J. GALLAGHER & CO.

Victim entityARTHUR J. GALLAGHER & CO.

Incidentdiscovered Jun 23, 2021

Stated responseSent written notification to affected consumers

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov