Exhibit 99.1 Masimo Reports First Quarter 2024 Financial Results First Quarter 2024 Highlights: • Consolidated revenue was $492.8 million; • Healthcare revenue was$339.6 million; • Non-healthcare revenue was $153.2 million; • GAAP net income per diluted share was$0.35; and • Non-GAAP net income per diluted share was $0.77. Irvine, California, May 7, 2024 - Masimo Corporation (Nasdaq: MASI) today announced its financial results for the first quarter ended March 30, 2024. First Quarter 2024 Results: Consoli ...