FEDERALItem 8.01 · voluntaryHackingManufacturingManufacturingLowActive

MASIMO CORPORATION

bd_4282cdeea6b17643 · schema v1 · pii pii-v1

Severity

Low

Discovered

Apr 27, 2025

Filed

May 6, 2025

To disclose

9 days

Affected

Not disclosed

Confidence

67%

Full breach record for MASIMO CORPORATION →2 incidents on file

Masimo Corporation (CIK 0000937556) filed an 8-K on May 6, 2025, reporting unauthorized activity on its on-premise network identified on April 27, 2025. The incident impacted manufacturing operations and order fulfillment. The company activated incident response protocols, isolated systems, engaged third-party cybersecurity professionals, and notified law enforcement. The investigation is ongoing, and the full scope is not yet known.

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Incident timeline

discovery → filing · 9 days

Apr 27, 2025

Discovered

May 6, 2025

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: MASIMO CORPORATION
norm: masimo
SEC CIK: 0000937556

Name: MASIMO CORPORATION
norm: masimo
SEC CIK: 0000937556
Industry: Manufacturingllm

Discovered: Apr 27, 2025
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: —
Attack vector: Unauthorized Access
Regulator citations: notified and is coordinating with law enforcement

During the incident: Activated our incident response protocols
Implemented containment measures, including proactively isolating impacted systems
Promptly commenced an investigation
Working to assess, mitigate, and remediate the incident with the assistance of third-party cybersecurity professionals
Notified and is coordinating with law enforcement
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 days(9 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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 filing

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statementThis record

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.sec.gov/Archives/edgar/data/937556/000110465925045035/tm2514064d1_8k.htm
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: May 6, 2025
Raw hash: 52bfe5d5b2c3b4a142cf2734f5ce13a4eea45d6d71ad2233011eecc222aeaa5e

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Reporting entityMASIMO CORPORATION

Victim entityMASIMO CORPORATION

Incidentdiscovered Apr 27, 2025

Stated responseActivated our incident response protocols

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.sec.gov

Source filing