HackingFinancial ServicesFinanceData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

SITUSAMC HOLDINGS CORPORATION

bd_dcf64a81d6209b11 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 12, 2025

Filed

Jan 28, 2026

To disclose

11 weeks

Affected

Not disclosed

Linked

17 filings

Confidence

64%

Full breach record for SITUSAMC HOLDINGS CORPORATION →

SitusAMC Holdings Corporation notified the California Attorney General of unauthorized access to its IT network between November 12-19, 2025. An external actor acquired data including names, addresses, dates of birth, and Social Security numbers. The company engaged third-party experts, notified law enforcement, and contained the incident. Identity theft protection services are being offered to affected individuals.

J jump to incidentP pin to compareR raw source

Incident timeline

discovery → filing · 11 weeks / 77 days

Nov 12, 2025

Begins

Nov 12, 2025

Discovered

Jan 28, 2026

Filed

vs. sector median

+3 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_6a4691fada8d391e2026-02-20 · +23dVerified
Montana State AGbd_28507ebc876b8c8d2026-03-10 · +41dVerified
Indiana State AGbd_70a785f4cf612d8c2026-03-10 · +41dVerified
Indiana State AGbd_8485960cdfce7d6c2026-03-10 · +41dVerified

Show 6 more filings ↓up to 68d gap

California State AGbd_c52f9d050e7058e12026-03-10 · +41dVerified
Oregon State AGbd_0cbe44e43d4d6e6f2026-03-23 · +54dVerified
California State AGbd_9fd5d288eb9921f42026-04-03 · +65dVerified
Maine State AGbd_e18d1724ef30fa6f2026-04-03 · +65dVerified
Texas State AGbd_4b06c2519a61551f2026-04-06 · +68dVerified
New Hampshire State AGbd_75b585487f6fa3562026-04-06 · +68dVerified

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 Servicesllm

Discovered: Nov 12, 2025
Breach occurred: Nov 12, 2025 – Nov 19, 2025
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 28, 2026
Affected individuals: Not disclosed
Data types: Identity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Unknown
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified certain law enforcement and governmental authorities

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
Took measures to further harden and enhance our security
Changes made: Offering identity theft protection services through IDX
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(77 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 7 states

View merged incident ↗

California State AGJan 28 · first · this page

California State AG+23d

Montana State AG+41d

Indiana State AG+41d

California State AG+41d

Oregon State AG+54d

California State AG+65d

Maine State AG+65d

Texas State AG+68d

New Hampshire State AG+68d

Pattern: first filing Jan 28 (CA), last Apr 6 (NH) — a 68-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://oag.ca.gov/ecrime/databreach/reports/sb24-617785
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 28, 2026
Raw hash: d35e78d8d6857bd16ddaf7238f496cb3e94371c22fad44508b7b546f2a895658

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

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov