HackingFinancial ServicesFinanceStolen CredentialsSupply Chain (3P Vendor)Customer Data InvolvedGovernment IDIdentity (basic)MediumContained

Boston Capital Holdings LP

bd_0f1ccf31ebc47b7f · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 12, 2026

Filed

May 18, 2026

To disclose

14 weeks

Affected

112state residents only

Linked

11 filings

Confidence

65%

Full breach record for Boston Capital Holdings LP →2 incidents on file

Boston Capital Holdings LP notified the New Hampshire Attorney General on May 18, 2026, of a data event affecting 112 NH residents. Unauthorized access occurred Jan 16-22, 2026, via a sophisticated actor exploiting third-party cloud systems to gain access. Data involved names and Social Security numbers. The company notified law enforcement, provided 12 months of credit monitoring, and notified consumer reporting agencies.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 27 days

discovery → filing · 14 weeks / 95 days

Jan 16, 2026

Begins

Feb 12, 2026

Discovered

May 18, 2026

Filed

vs. sector median

+4 wks slower

This filing is one of 11 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Vermont State AGbd_22628c792696357d2026-05-18Verified
Montana State AGbd_2c85d337145785ca2026-05-18Verified
Indiana State AGbd_2e06c1f7553bb4ca2026-05-18Verified
Maine State AGbd_7b5266914026165f2026-05-18Verified by operator

Show 6 more filings ↓up to 17d gap

Oregon State AGbd_966984c8bec10ad52026-05-18Verified by operator
Nebraska State AGbd_a6390d3a72deefb12026-05-18Verified
California State AGbd_cdd5e07e39628f062026-05-18Verified by operator
Massachusetts State AGbd_d48a16fe689f76b02026-05-18Candidate
Texas State AGbd_2e07299b6adc24342026-05-19 · +1dVerified by operator
Illinois State AGbd_1d81a40d96eaf5e62026-05-01 · +17dVerified

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: Boston Capital Holdings LP
norm: boston capital
Domain: bostoncapital.com
Industry: Financial Servicesllm

Discovered: Feb 12, 2026
Breach occurred: Jan 16, 2026 – Jan 22, 2026
Undetected for: 27 daysoccurrence → discovery
Materiality determined: May 18, 2026
Notification sent: May 18, 2026
Affected individuals: 112state-resident count only
Data types: Government IDIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1195 Supply Chain CompromiseT1078 Valid Accounts
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General Consumer Protection & Antitrust Bureau
Initial access: supply_chain

During the incident: Notified federal law enforcement regarding the event
Providing access to credit monitoring services for twelve (12) months, through Cyberscout, a TransUnion company, to notified individuals at no cost
Providing notified individuals with guidance on how to better protect against identity theft and fraud
Providing written notice of this matter to the three major consumer reporting agencies, Equifax, Experian, and TransUnion
Changes made: Evaluating additional technical measures
Reviewing staff training and supervision practices
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 weeks(95 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 · 11 states

View merged incident ↗

Illinois State AGMay 1 · first

Vermont State AG+17d

Montana State AG+17d

Indiana State AG+17d

Maine State AG+17d

Oregon State AG+17d

Nebraska State AG+17d

California State AG+17d

Massachusetts State AG+17d

New Hampshire State AG+17d · this page

Texas State AG+18d

Pattern: first filing May 1 (IL), last May 19 (TX) — a 18-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/boston-capital-holdings-20260518.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 18, 2026
Raw hash: 755fc1eb1273b73761b59cce0ea231097d34eb578ff719b7426c544dd6cbe2b9

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityBoston Capital Holdings LP

Incidentdiscovered Feb 12, 2026

Stated responseNotified federal law enforcement regarding the event

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov