MASIMO CORP — Director's Dealing 2026

Jan 30, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MASIMO CORP (MASI)
CIK: 0000937556
Period of Report: 2026-01-28

Reporting Person: Sampath Anand (EVP, Ops & Clinical Research)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-01-28	Common Stock	M	30000	$37.84	Acquired	59589	Direct
2026-01-28	Common Stock	S	11924	$136.56	Disposed	47665	Direct
2026-01-28	Common Stock	S	6560	$137.22	Disposed	41105	Direct
2026-01-28	Common Stock	S	196	$138.09	Disposed	40909	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-01-28	Non-Qualified Stock Option (Right to Buy)	$37.84	M	30000	Disposed	2026-03-01	Common Stock (30000)	Direct

Footnotes

F1: The shares covered by this Form 4 were exercised and sold pursuant to a Rule 10b5-1 Sales Plan dated as of September 12, 2025, which is intended to comply with Rule 10b5-1 promulgated under the Securities Exchange Act of 1934, as amended.

F2: The price reported in Column 4 represents the weighted average purchase price per share. The actual sale prices ranged from a low of $135.94 per share to a high of $136.94 per share. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F3: The price reported in Column 4 represents the weighted average purchase price per share. The actual sale prices ranged from a low of $136.95 per share to a high of $137.89 per share. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F4: The price reported in Column 4 represents the weighted average purchase price per share. The actual sale prices ranged from a low of $138.07 per share to a high of $138.12 per share. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F5: This option was granted on February 29, 2016 and is exercisable as the option vests. The option vested over a 5 year period, with 20% of the shares subject to the option vesting on each anniversary of the grant date.