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

Reporting relationship: COO, Consumer Division
Issuer ticker: MASI
Reported as of: 23 Sep 2025
Net transaction value: +$2,131,950
SEC form: 4
Accepted by SEC: 25 Sep 2025, 18:25:25 UTC
Prior SEC filing: 04 Mar 2025
Source filing: View source filing
Reporting owner signature: /s/ Micah W. Young, Attorney-In-Fact

Key filing fact

Blair Tripodi filed Form 4 for MASIMO CORP (MASI) on 25 Sep 2025.

Key facts

This page summarizes Blair Tripodi's Form 4 filing for MASIMO CORP (MASI).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 25 Sep 2025, 18:25.

Change

Previous filing in this sequence was filed on 04 Mar 2025.
Current net transaction value: +$2,131,950.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001947433 Primary reporting owner

Tripodi Blair

Relationship: COO, Consumer Division
Address: C/O MASIMO CORPORATION, 52 DISCOVERY, IRVINE
Signature: /s/ Micah W. Young, Attorney-In-Fact
Signature date: 25 Sep 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MASI transaction

Common Stock

Options Exercise

Transaction value: $2,131,950
Shares: +15,000
Change %: +218%
Price: $142.13
Shares after: 21,896
Date: 23 Sep 2025
Ownership: Direct
Footnotes: F1

MASI transaction

Common Stock

Tax liability

Transaction value: $0
Shares: -8,078
Change %: -37%
Price: $0.000000
Shares after: 13,818
Date: 23 Sep 2025
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MASI transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value: $0
Shares: -15,000
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 23 Sep 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 15,000
Exercise price
Footnotes: F3, F4, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Blair Tripodi is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 5 footnotes

Footnote 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.

Footnote 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.

Footnote 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.

Footnote F4

These restricted stock units were granted on March 1, 2024.

Footnote 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.