[Form 3] Masimo Corporation Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

Tim Benner, Chief Marketing Officer of Masimo Corporation (MASI), reports initial equity awards granted June 9, 2025. He holds a non‑qualified stock option for 2,537 shares with an exercise price of $171.88 that vests 20% on each anniversary over five years, and 1,163 restricted stock units that vest 25% on each anniversary over four years. Each RSU converts to one share upon vesting.

Insights

Compensation Analyst

TL;DR: Executive equity awards with staged vesting are standard retention incentives; grant sizes and exercise price are disclosed.

The Form 3 discloses a June 9, 2025 grant comprising a non‑qualified option for 2,537 shares at an exercise price of $171.88 and 1,163 RSUs. The option vests 20% annually over five years while the RSUs vest 25% annually over four years. These multi‑year schedules are typical for senior hires and serve to align the officer's incentives with shareholder value over time. The disclosure shows direct beneficial ownership and contains no unusual acceleration or conversion terms.

Corporate Governance Expert

TL;DR: Routine Form 3 filing documenting initial insider holdings and standard vesting; compliance and signature present.

The filing is an initial statement of beneficial ownership for CMO Tim Benner reporting equity grants dated June 9, 2025. It records direct ownership of option and RSU awards and explains vesting mechanics; each RSU represents the contingent right to one share upon vesting. The form is signed via attorney‑in‑fact, with the signature dated 08/11/2025. There are no disclosures here of material transactions beyond the grant terms and no indications of amendments or unusual governance items.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Benner Tim

(Last) (First) (Middle)

C/O MASIMO CORPORATION

52 DISCOVERY

(Street)

IRVINE CA 92618

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
07/31/2025

3. Issuer Name and Ticker or Trading Symbol
MASIMO CORP [ MASI ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Marketing Officer

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Non-Qualified Stock Option (Right to Buy)	(1)	06/09/2035	Common Stock	2,537	$171.88	D
Restricted Stock Units	(2)	06/09/2035	Common Stock	1,163	(3)	D

Explanation of Responses:

1. This option was granted on June 9, 2025 and is exercisable as the option vests. The option vests over a five year period, with 20% of the shares subject to the option vesting on each anniversary of the grant date.

2. This RSU award was granted on June 9, 2025 and will vest ratably over four years, with 25% of the award vesting on each anniversary of the grant date.

3. Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of the Issuer upon vesting of the RSU.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Micah W. Young, Attorney-In-Fact	08/11/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Tim Benner disclose on the MASI Form 3?

He disclosed a non‑qualified stock option for 2,537 shares at an exercise price of $171.88 and 1,163 restricted stock units, both granted June 9, 2025.

What are the vesting terms for the grants reported on MASI Form 3?

The option vests 20% on each anniversary over five years; the RSUs vest 25% on each anniversary over four years.

When is the event requiring the Form 3 statement for MASI?

The Date of Event Requiring Statement is 07/31/2025.

Are the reported holdings direct or indirect in the MASI Form 3?

Both the non‑qualified option and the RSUs are reported as Direct (D) beneficial ownership.

Who signed the MASI Form 3 and when?

The Form 3 was signed by Micah W. Young, Attorney‑In‑Fact on 08/11/2025.