Masimo identifies unauthorized network activity on April 27; manufacturing and shipping operations impacted.

MASIMO CORP

Discovered unauthorized activity on on-premise network on April 27, 2025; activated incident response and containment protocols.
Certain manufacturing facilities operating at reduced levels; order processing and shipping temporarily disrupted.
Company believes incident not affecting cloud-based systems; investigation ongoing with third-party experts and law enforcement.
Full scope, nature, and impact not yet known; forward-looking statements cite potential legal, reputational, and financial risks.

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