Paul Stephen E. 4

4 · MASIMO CORP · Filed May 4, 2011

Form 4

Period: 2011-05-02

President, US Acute Care

Transactions

Exercise/Conversion
Non-Qualified Stock Option (Right to buy)
2011-05-02−6,000→ 6,000 total
Exercise: $28.50Exp: 2018-03-17→ Common Stock (6,000 underlying)
Sale
Common Stock
2011-05-02$35.00/sh−9,000$315,000→ 0 total
Exercise/Conversion
Common Stock
2011-05-02$24.68/sh+1,000$24,680→ 9,000 total
Exercise/Conversion
Common Stock
2011-05-02$23.14/sh+2,000$46,280→ 8,000 total
Exercise/Conversion
Non-Qualified Stock Option (Right to buy)
2011-05-02−2,000→ 2,000 total
Exercise: $23.14Exp: 2019-03-04→ Common Stock (2,000 underlying)
Exercise/Conversion
Common Stock
2011-05-02$28.50/sh+6,000$171,000→ 6,000 total
Exercise/Conversion
Non-Qualified Stock Option (Right to buy)
2011-05-02−1,000→ 1,000 total
Exercise: $24.68Exp: 2019-08-17→ Common Stock (1,000 underlying)

Footnotes (4)

[F1]The shares covered by this Form 4 have been sold pursuant to a Rule 10b5-1 Sales Plan dated December 17, 2010, 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 August 17, 2009 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.
[F3]This option was granted on March 4, 2009 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.
[F4]This option was granted on March 17, 2008 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.

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