MASIMO CORP — Director's Dealing 2011

Jul 21, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MASIMO CORP (MASI)
CIK: 0000937556
Period of Report: 2011-07-19

Reporting Person: Lee Yongsam (EVP, CIO, Regulatory Affairs)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-07-19	Common Stock	S	9000	$30.6373	Disposed	58000	Direct
2011-07-19	Common Stock	M	9000	$2.75	Acquired	67000	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-07-19	Incentive Stock Option	$2.75	M	9000	Disposed	2011-07-19	Common Stock (9000)	Direct

Footnotes

F1: This option was granted on July 19, 2001 and was 100% exercisable as of July 19, 2006.

F2: The shares covered by this Form 4 have been sold pursuant to a Rule 10b5-1 Sales Plan dated June 15, 2011, which is intended to comply with Rule 10b5-1 promulgated under the Securities Exchange Act of 1934, as amended.