MASIMO CORP — Director's Dealing 2019

May 17, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MASIMO CORP (MASI)
CIK: 0000937556
Period of Report: 2019-05-16

Reporting Person: Barker Steven (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-05-16	Common Stock	M	10000	$21.97	Acquired	74832	Direct
2019-05-16	Common Stock	S	10000	$145	Disposed	64832	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-05-16	Non-Qualified Stock Option (Right to Buy)	$21.97	M	10000	Disposed	2023-05-28	Common Stock (10000.0)	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 March 1, 2019, and amended on March 13, 2019, which is intended to comply with Rule 10b5-1 promulgated under the Securities Exchange Act of 1934, as amended.

F2: This option was granted on May 28, 2013 and is exercisable as the option vests. This option vested over a five year period, with 20% of the shares subject to the option vesting on each anniversary of the grant date.