MASIMO CORP — Director's Dealing 2025

Mar 4, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MASIMO CORP (MASI)
CIK: 0000937556
Period of Report: 2025-03-01

Reporting Person: Tripodi Blair (COO, Consumer Division)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-03-01	Common Stock	M	15000	—	Acquired	15000	Direct
2025-03-01	Common Stock	F	8104	$188.77	Disposed	6896	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-03-01	Restricted Stock Units	$	M	15000	Disposed		Common Stock (15000)	Direct

Footnotes

F1: These shares were withheld by the Issuer in order to satisfy certain tax withholding obligations in connection with the issuance of shares upon the vesting of certain performance restricted stock units.

F2: For the vesting that occurred on March 1, 2025, the Company calculated the number of vested shares and shares withheld for tax liability based on the Company's closing stock price on the immediately preceding business day. As a result, the Reporting person received 6,896 shares of common stock, as shown in Table I.

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.

F4: As previously reported, the reporting person was granted 30,000 restricted stock units on March 1, 2024, 50% of which will vest on March 1, 2025 and 50% of which will vest on March 1, 2026. The remaining 15,000 restricted stock units are shown in table II and are scheduled to vest on March 1, 2026.