HackingTechnologyManufacturingInformationTargetedIdentity (basic)Government IDMediumContained

OSI SYSTEMS, INC.

bd_0a97f13a9774839c · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 25, 2025

Filed

Mar 11, 2026

To disclose

11 weeks

Affected

126state residents only

Linked

10 filings

Confidence

66%

Full breach record for OSI SYSTEMS, INC. →

OSI Systems, Inc. notified the New Hampshire AG of a data event affecting 126 NH residents. Suspicious activity was detected on Dec 25, 2025, leading to an investigation by third-party forensic specialists. Unauthorized access to files containing names and SSNs was confirmed. Notices were sent on March 11, 2026, offering 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >30d11 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

discovery → filing · 11 weeks / 76 days

Dec 25, 2025

Discovered

Mar 11, 2026

Filed

vs. sector median

8 wks faster

This filing is one of 10 about the same incident.View merged incident

A leak claim by inc_ransom about this victim predates this filing by 71 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteinc_ransombd_0fe82859b7e740312025-12-30 · +71dVerified

Regulatory filings (8) · sorted by filing gap

Nebraska State AGbd_03b6bd32acad77302026-03-11Verified
Maine State AGbd_1be6cf685a8a18642026-03-11Verified
Washington State AGbd_5de9a0ae9cba56792026-03-11Verified by operator
Indiana State AGbd_70c902ae9bbbfa9f2026-03-11Verified

Show 4 more filings ↓up to 1d gap

Massachusetts State AGbd_7bfa9894135dbf542026-03-11Verified by operator
California State AGbd_f9015384334e14fd2026-03-11Verified
Texas State AGbd_a5c9fc36c25a18cd2026-03-12 · +1dVerified
Vermont State AGbd_c9de4de82a0958042026-03-10 · +1dVerified by operator

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: OSI SYSTEMS, INC.
norm: osi systems
Domain: osi-systems.com
Industry: TechnologyllmManufacturingllm

Discovered: Dec 25, 2025
Materiality determined: —
Notification sent: Mar 11, 2026
Affected individuals: 126state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified Office of the New Hampshire Attorney GeneralProviding written notice of this event to appropriate state regulators and the three major credit reporting agencies

During the incident: Initiated an investigation into the nature and scope of the activity with the assistance of third-party forensic specialists
Notified federal law enforcement regarding the event
Providing access to credit monitoring services for twelve (12) months, through IDX, to individuals whose personal information was potentially affected by this incident, at no cost to these individuals
Providing written notice of this event to appropriate state regulators and the three major credit reporting agencies, Equifax, Experian, and TransUnion
Changes made: Implementing additional security measures to further protect against similar incidents occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(76 days from discovery to filing)
Compliance flags: Leak >30d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 9 filings · 9 states

View merged incident ↗

Vermont State AGMar 10 · first

Nebraska State AG+1d

Maine State AG+1d

Washington State AG+1d

Indiana State AG+1d

Massachusetts State AG+1d

California State AG+1d

New Hampshire State AG+1d · this page

Texas State AG+2d

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/osi-systems-20260311.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 11, 2026
Raw hash: 18f0ab5f031ab9c4a0e53309bd78a2b9cbf1110e48db9ebfd85f9be5156a5e52

Linked disclosures

Ransomware claims (1)

Regulatory filings (8) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityOSI SYSTEMS, INC.

Incidentdiscovered Dec 25, 2025

Stated responseInitiated an investigation into the nature and scope of the activity with the assistance of third-party forensic specialists

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov