HackingPIIIdentity (basic)LowContained

Lincoln Holdings LLC

bd_e76036550d2f6d4c · schema v1 · pii pii-v1

Severity

Low

Discovered

Dec 9, 2025

Filed

Apr 28, 2026

To disclose

—

Affected

Not disclosed

Linked

6 filings

Confidence

65%

Full breach record for Lincoln Holdings LLC →

Lincoln Holdings LLC d/b/a Monumental Sports & Entertainment notified Nebraska residents of a security incident detected on December 9, 2025. An external party gained unauthorized access to systems and exfiltrated personal information between December 8 and 9, 2025. The company determined the scope of the breach on April 7, 2026, and sent notification letters to affected individuals. No identity misuse has been identified. The company engaged external cybersecurity specialists and law enforcement, and is offering 24 months of complimentary identity monitoring via Kroll.

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Incident timeline

undetected · 1 days

Dec 8, 2025

Begins

Dec 9, 2025

Discovered

Apr 28, 2026

Filed

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Indiana State AGbd_e3b87a3238d35fe42026-04-28Verified
New Hampshire State AGbd_358f46ea97aa73ac2026-04-27 · +1dVerified
Maine State AGbd_88360644771077932026-04-27 · +1dCandidate
Massachusetts State AGbd_8eec767369f522342026-04-27 · +1dVerified

Show 1 more filing ↓up to 1d gap

Vermont State AGbd_c84e5c9c10c44bf12026-04-27 · +1dVerified

Name: Lincoln Holdings LLC
norm: lincoln holdings

Name: Lincoln Holdings LLC
norm: lincoln holdings
Also named: Lincoln Holdings LLCdba oflegal entity
Monumental Sports & Entertainmentdba oftrade name

Discovered: Dec 9, 2025
Breach occurred: Dec 8, 2025 – Dec 9, 2025
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Apr 7, 2026
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: worked closely with law enforcement
Initial access: exploit_public_facing

During the incident: Activated our incident response protocols
Initiated an investigation
Took steps to contain it
Launched an investigation with the support of external cybersecurity specialists
Worked closely with law enforcement
Changes made: Offering individuals complimentary identity monitoring services through Kroll for 24 months
Enhance our security measures to protect your data
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 6 states

View merged incident ↗

New Hampshire State AGApr 27 · first

Maine State AGApr 27 · first

Massachusetts State AGApr 27 · first

Vermont State AGApr 27 · first

Indiana State AG+1d

Nebraska State AG+1d · 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://nebraska.gov/ago/data-breach/documents/b623b8c9-af6c-46b6-ba38-1a17e075b627.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 28, 2026
Raw hash: f4b8e968af2f4abeeb48beae90475e930c1b389fe5a556af83f1ce4c4a9f63bc

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityLincoln Holdings LLC

Victim entityLincoln Holdings LLC

Incidentdiscovered Dec 9, 2025

Stated responseActivated our incident response protocols

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov