Exhibit 99.1 Masimo Reports Third Quarter 2025 Results Irvine, California, November 4, 2025 - Masimo Corporation (Nasdaq: MASI) today announced its financial results for the third quarter ended September 27, 2025. Third Quarter 2025 Results From Continuing Operations : (1) Katie Szyman, Chief Executive Officer of Masimo, said, "In the third quarter, we saw continued positive momentum across our core healthcare business, driven by the power of our innovative products. Revenues grew 8%, operating margin impro ...