Blair Tripodi - Sep 23, 2025 Form 4 Insider Report for MASIMO CORP (MASI)

Role
COO, Consumer Division
Signature
/s/ Micah W. Young, Attorney-In-Fact
Stock symbol
MASI
Transactions as of
Sep 23, 2025
Transactions value $
$2,131,950
Form type
4
Date filed
9/25/2025, 06:25 PM
Previous filing
Mar 4, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Tripodi Blair COO, Consumer Division C/O MASIMO CORPORATION, 52 DISCOVERY, IRVINE /s/ Micah W. Young, Attorney-In-Fact 2025-09-25 0001947433

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MASI Common Stock Options Exercise $2.13M +15K +217.52% $142.13 21.9K Sep 23, 2025 Direct F1
transaction MASI Common Stock Tax liability $0 -8.08K -36.89% $0.00 13.8K Sep 23, 2025 Direct F2

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 -15K -100% $0.00 0 Sep 23, 2025 Common Stock 15K Direct F3, F4, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Blair Tripodi is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id Content
F1 The transaction was completed prior to the market open on September 23, 2025, and the Company used the stock price from prior day for the restricted stock unit settlement and related payroll tax purposes.
F2 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.
F3 Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of the Issuer upon vesting of the RSU.
F4 These restricted stock units were granted on March 1, 2024.
F5 On September 23, 2025, in connection with the Company's sale of its consumer audio business, Mr. Tripodi resigned from the Company for good reason, as defined in the Restricted Stock Unit Award Agreement applicable to this grant, resulting in the full acceleration of the remaining unvested restricted stock units.