MASIMO CORP — Director's Dealing 2011

Mar 24, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MASIMO CORP (MASI)
CIK: 0000937556
Period of Report: 2011-03-22

Reporting Person: Barker Steven (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-03-22	Common Stock	S	10000	$32.00	Disposed	0	Direct
2011-03-22	Common Stock	M	10000	$4.6667	Acquired	10000	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-03-22	Non-Qualified Stock Option (Right to Buy)	$4.6667	M	10000	Acquired	2015-10-10	Common Stock (10000)	Direct

Footnotes

F1: The shares covered by this Form 4 have been sold pursuant to a Rule 10b5-1 Sales Plan dated as of December 16, 2010, which is intended to comply with Rule 10b5-1 promulgated under the Securities Exchange Act of 1934, as amended.

F2: This option, issued 10/10/2005, is fully exerciseable.