Omar Ahmed - 13 Nov 2025 Form 4 Insider Report for MASIMO CORP (MASI)

Role
CTIO & EVP of Engineering
Signature
/s/ Micah W. Young, Attorney-In-Fact
Issuer symbol
MASI
Transactions as of
13 Nov 2025
Transactions value $
$377,112
Form type
4
Filing time
17 Nov 2025, 21:41:07
Previous filing
11 Aug 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Ahmed Omar CTIO & EVP of Engineering C/O MASIMO CORPORATION, 52 DISCOVERY, IRVINE /s/ Micah W. Young, Attorney-In-Fact 17 Nov 2025 0002077034

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MASI Common Stock Options Exercise $377K +2.47K +139.93% $152.43 4.24K 13 Nov 2025 Direct
transaction MASI Common Stock Tax liability $0 -974 -22.96% $0.00 3.27K 13 Nov 2025 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MASI Restricted Stock Units Options Exercise $0 -2.47K -100% $0.00 0 13 Nov 2025 Common Stock 2.47K Direct F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 These shares were withheld by the Issuer in order to satisfy certain tax withholding obligations in connection with the issuance of shares upon the vesting of certain restricted stock units.
F2 Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of the Issuer upon vesting of the RSU.
F3 This RSU award was granted on November 13, 2024 and vested in full on November 13, 2025.