MASIMO CORP — Director's Dealing 2013

May 30, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MASIMO CORP (MASI)
CIK: 0000937556
Period of Report: 2013-05-28

Reporting Person: KIANI JOE E (Director, CEO and Chairman of the Board)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-28	Non-qualified stock option (right to buy)	$21.97	A	300000	Acquired	2023-05-28	Common Stock (300000)	Direct

Footnotes

F1: This option was granted on May 28, 2013 and is exercisable as the option vests. This option vests over a five year period, with 20% of the shares subject to the option vesting on each anniversary of the grant date.