144 0002077034 XXXXXXXX LIVE 0000937556 MASIMO CORP 001-33642 52 DISCOVERY IRVINE CA 92618 949-297-7000 Ahmed Omar Officer Common Charles Schwab & Co., Inc.

3000 Schwab Way Westlake TX 76262

3229 461069.00 53713949 11/28/2025 NASDAQ Common 03/22/2025 Restricted Stock Lapse MASIMO CORPORATION N 1729 03/22/2025 Equity Compensation Common 11/13/2025 Restricted Stock Lapse MASIMO CORPORATION N 1500 11/13/2025 Equity Compensation Y 11/28/2025 08/29/2025 Omar Ahmed