Masimo hit by massive cyberattack as it sells audio brands Denon, Polk to Samsung

Masimo Corporation, a global medtech company specialising in noninvasive monitoring technologies, disclosed a cyberattack that severely disrupted its activities. At the same time, Masimo said it is selling its audio products business, including world-class audio brands Bowers & Wilkins, Denon, Marantz, Polk, and others.

Masimo disclosed a cybersecurity incident in a filing with the Securities and Exchange Commission (SEC) alongside its quarterly earnings report and announcement of the sale of its consumer audio business, “Sound United,” for an aggregate purchase price of $350,000,000.

The company said it identified unauthorized activity on the on-premise network on April 27th, 2025.

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