MASIMO CORP — Director's Dealing 2025

Aug 12, 2025

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: MASIMO CORP (MASI)
CIK: 0000937556
Period of Report: 2025-07-31

Reporting Person: Meehan Greg Allen (Chief Commerical Officer)

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Non-Qualified Stock Option (Right to Buy)	$155.13	2035-07-21	Common Stock (4306)		Direct
Restricted Stock Units	$	2035-07-21	Common Stock (1933)		Direct

Footnotes

F1: This option was granted on July 21, 2025 and is exercisable as the option vests. The option vests over a five year period, with 20% of the shares subject to the option vesting on each anniversary of the grant date.

F2: This RSU award was granted on July 21, 2025 and will vest ratably over four years, with 25% of the award vesting on each anniversary of the grant date.

F3: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of the Issuer upon vesting of the RSU.