HackingFinancial ServicesTechnologyFinanceData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

SITUSAMC HOLDINGS CORPORATION

bd_75b585487f6fa356 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 12, 2025

Filed

Apr 6, 2026

To disclose

21 weeks

Affected

51state residents only

Linked

17 filings

Confidence

66%

Full breach record for SITUSAMC HOLDINGS CORPORATION →

SitusAMC Holdings Corporation notified the New Hampshire Attorney General of a data security incident affecting 51 New Hampshire residents. Unauthorized access occurred between November 13 and 21, 2025. Personal information, including names, SSNs, driver's license numbers, and financial account data, was accessed. SitusAMC engaged third-party experts, notified law enforcement, and offered 24 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

Nov 13, 2025

Begins

Apr 6, 2026

Filed

vs. sector median

+12 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

Texas State AGbd_4b06c2519a61551f2026-04-06Verified
California State AGbd_9fd5d288eb9921f42026-04-03 · +3dVerified
Maine State AGbd_e18d1724ef30fa6f2026-04-03 · +3dVerified
Oregon State AGbd_0cbe44e43d4d6e6f2026-03-23 · +14dVerified

Show 6 more filings ↓up to 45d gap

Montana State AGbd_28507ebc876b8c8d2026-03-10 · +27dVerified
Indiana State AGbd_70a785f4cf612d8c2026-03-10 · +27dVerified
Indiana State AGbd_8485960cdfce7d6c2026-03-10 · +27dVerified
California State AGbd_c52f9d050e7058e12026-03-10 · +27dVerified
California State AGbd_6a4691fada8d391e2026-02-20 · +45dVerified
Washington State AGbd_7916a021a8a6b3d52026-02-20 · +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: 51state-resident count only
Data types: Identity (basic)Government IDFinancial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: Notified Office of the New Hampshire Attorney General
Initial access: exploit_public_facing

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
Taking measures to further harden and enhance its security
Offering free credit monitoring and identity protection services for 24 months
Changes made: Taking measures to further harden and enhance its security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 21 weeks(145 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 · 8 states

View merged incident ↗

California State AGFeb 20 · first

Washington State AGFeb 20 · first

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 · this page

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://mm.nh.gov/files/uploads/doj/remote-docs/situsamc-holdings-20260406.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 6, 2026
Raw hash: bb878cc818c50efa3ecb0cbdf0d76dba53519299aebaf82ea0fa9532aee3c639

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 provenancemm.nh.gov