MASIMO CORP — Director's Dealing 2010

Mar 11, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MASIMO CORP (MASI)
CIK: 0000937556
Period of Report: 2010-03-09

Reporting Person: CAHILL EDWARD L (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-03-09	Common Stock	M	64800	$2.75	Acquired	99800	Direct
2010-03-09	Common Stock	M	30000	$11.5567	Acquired	129800	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-03-09	Non-qualified Stock Option (right to buy)	$2.75	M	64800	Disposed	2013-05-22	Common Stock (64800)	Direct
2010-03-09	Non-qualified Stock Option (right to buy)	$11.5567	M	30000	Disposed	2016-10-02	Common Stock (30000)	Direct

Footnotes

F1: 64,800 shares are vested and exerciseable as of 3/9/2010.

F2: 30,000 shares are vested and exerciseable as of 3/9/2010.