HackingFinancial ServicesTechnologyFinanceData ExfiltratedCustomer Data InvolvedFinancial accountIdentity (basic)Government IDMinorPHIHealth (basic)HighContained

SITUSAMC HOLDINGS CORPORATION

bd_7916a021a8a6b3d5 · schema v1 · pii pii-v1

Severity

High

Discovered

Nov 12, 2025

Filed

Feb 20, 2026

To disclose

14 weeks

Affected

20,456state residents only

Linked

17 filings

Confidence

70%

Full breach record for SITUSAMC HOLDINGS CORPORATION →

SitusAMC Holdings Corporation filed a supplemental notice with the Washington AG regarding a cyberattack where unauthorized access occurred Nov 13-21, 2025. The incident exposed PII including names, SSNs, driver's licenses, and financial account data for 20,456 Washington residents. Notices were mailed by March 10, 2026, offering 24 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Washington clock✗ WA AG >90d14 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

Nov 13, 2025

Begins

Feb 20, 2026

Filed

vs. sector median

+6 wks slower

This filing is one of 17 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

California State AGbd_6a4691fada8d391e2026-02-20Verified
Montana State AGbd_28507ebc876b8c8d2026-03-10 · +18dVerified
Indiana State AGbd_70a785f4cf612d8c2026-03-10 · +18dVerified
Indiana State AGbd_8485960cdfce7d6c2026-03-10 · +18dVerified

Show 6 more filings ↓up to 45d gap

California State AGbd_c52f9d050e7058e12026-03-10 · +18dVerified
Oregon State AGbd_0cbe44e43d4d6e6f2026-03-23 · +31dVerified
California State AGbd_9fd5d288eb9921f42026-04-03 · +42dVerified
Maine State AGbd_e18d1724ef30fa6f2026-04-03 · +42dVerified
Texas State AGbd_4b06c2519a61551f2026-04-06 · +45dVerified
New Hampshire State AGbd_75b585487f6fa3562026-04-06 · +45dVerified

Showing first 10 of 16 linked disclosures.

Name: SITUSAMC HOLDINGS CORPORATION
norm: situsamc holdings
Domain: situsamc.com

Name: SITUSAMC HOLDINGS CORPORATION
norm: situsamc holdings
Domain: situsamc.com
Industry: Financial ServicesllmTechnologyllm

Discovered: Nov 12, 2025
Breach occurred: Nov 13, 2025 – Nov 21, 2025
Materiality determined: —
Notification sent: Mar 10, 2026
Affected individuals: 20,456state-resident count only
Data types: Identity (basic)Government IDFinancial accountMinor
Data elements: NameSocial Security numberDriver's licence numberFinancial account numberDate of birthMilitary ID numberPassport numberHealth insurance IDMedical information
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoing
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: Notified Washington Attorney General

During the incident: Commenced an investigation with the assistance of third-party experts
Notified certain law enforcement and governmental authorities
Began taking measures to assess and contain the incident
Offering identity theft protection services through IDX
Changes made: Took measures to further harden and enhance our security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 weeks(100 days from discovery to filing)
Compliance flags: WA AG >90d
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.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 8 states

View merged incident ↗

California State AGFeb 20 · first

Washington State AGFeb 20 · first · this page

Montana State AG+18d

Indiana State AG+18d

California State AG+18d

Oregon State AG+31d

California State AG+42d

Maine State AG+42d

Texas State AG+45d

New Hampshire State AG+45d

Pattern: first filing Feb 20 (CA), last Apr 6 (NH) — a 45-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 16 — 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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA36744.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 20, 2026
Raw hash: fe8ca104c3bde43df5b3652562e1ac82c9d2bbf2c65190be10644998f0e4cc6d

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entitySITUSAMC HOLDINGS CORPORATION

Victim entitySITUSAMC HOLDINGS CORPORATION

Incidentdiscovered Nov 12, 2025

Stated responseCommenced an investigation with the assistance of third-party experts

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com