HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedSupply Chain (3P Vendor)Financial accountIdentity (basic)Government IDMediumContained

Marble Harbor Investment Counsel

bd_bf068749598f5e68 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 23, 2026

Filed

May 21, 2026

To disclose

28 days

Affected

67state residents only

Linked

2 filings

Confidence

66%

Full breach record for Marble Harbor Investment Counsel →

Marble Harbor Investment Counsel, LLC notified clients of unauthorized access to a brokerage platform between April 13 and April 23, 2026. An unauthorized actor accessed client accounts, potentially exposing names and government identifiers. The company worked with its broker-dealer, notified law enforcement, and provided 24 months of credit monitoring and fraud assistance to affected individuals, including 2 Rhode Island residents.

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Massachusetts clock✓ MA AG ≤30d28 days discovery → filing

Incident timeline

undetected · 10 days

discovery → filing · 28 days

Apr 13, 2026

Begins

Apr 23, 2026

Discovered

May 21, 2026

Filed

vs. sector median

4 wks faster

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

New Hampshire State AGbd_c8714f176ae0295d2026-05-21Verified

Name: Marble Harbor Investment Counsel
norm: marble harbor investment counsel
Domain: marbleharboric.com

Name: Marble Harbor Investment Counsel
norm: marble harbor investment counsel
Domain: marbleharboric.com
Industry: Financial Servicesllm

Discovered: Apr 23, 2026
Breach occurred: Apr 13, 2026 – Apr 23, 2026
Undetected for: 10 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 21, 2026
Affected individuals: 67state-resident count only
Data types: Financial accountIdentity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Worked with the broker dealer to investigate the nature and scope of the unauthorized activity
Notified law enforcement
Provided 24 months of Triple Bureau Credit Monitoring
Provided proactive fraud assistance through IDX
Changes made: Conducted a comprehensive review of all information that could have been subject to access
Actively reviewed and continue to monitor vigilantly all account activity
Work collaboratively with the broker dealer in support of security efforts
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 28 days(28 days from discovery to filing)
Compliance flags: MA AG ≤30d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

New Hampshire State AGMay 21 · first

Massachusetts State AGMay 21 · 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/2026-831-marble-harbor-investment-counsel-llc/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 21, 2026
Raw hash: 7a8b4794225bc93ea1b2861e3664a72e51148eea7f844018d1d0b872419d6538

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMarble Harbor Investment Counsel

Victim entityMarble Harbor Investment Counsel

Incidentdiscovered Apr 23, 2026

Stated responseWorked with the broker dealer to investigate the nature and scope of the unauthorized activity

ComplianceMA AG ≤30d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov