[144] MASIMO CORP SEC Filing

Rhea-AI Filing Summary

Form 144 filed for MASIMO CORPORATION (MASI): An individual proposes selling 25,000 common shares acquired the same day via an employee stock option exercise. The filing lists an aggregate market value of $3,518,983.00 and identifies Charles Schwab & Co., Inc. as the broker. The planned sale date is 09/23/2025 on NASDAQ.

The filing states the payment was handled by the broker as a cashless exercise. The filer reports no securities sold in the past three months and affirms they are not aware of undisclosed material adverse information about the issuer.

Positive

• Complete transaction disclosure: Form includes class, share amount, aggregate market value, broker, and planned sale date.
• Clear acquisition and payment method: Identifies the shares were obtained via employee stock option exercise and paid through a broker cashless exercise.
• No recent dispositions: Filing states "Nothing to Report" for securities sold during the past three months.

Negative

• Insider sale proposed: 25,000 shares are planned for sale, with an aggregate market value of $3,518,983.00.
• Timing concentration: Acquisition and proposed sale dates are the same (09/23/2025), indicating immediate disposition after exercise.

Insights

Securities Analyst

TL;DR: Routine insider sale following an employee option exercise, executed via cashless broker arrangement; not a standalone material event.

The transaction described is a standard post-exercise disposition: 25,000 common shares acquired and proposed for sale on the same date, with a reported aggregate market value of $3,518,983.00. Use of a broker for a cashless exercise is common and indicates the filer monetized option proceeds through immediate sale rather than an out-of-pocket cash purchase. The filing discloses no other recent dispositions and includes the filer's representation about lack of undisclosed material information, which is a required attestation.

Corporate Governance Expert

TL;DR: Compliance-focused notice consistent with Rule 144 requirements; contains required attestations and transaction detail.

This Form 144 provides the issuer, broker, class, number of shares, aggregate value, acquisition method (employee stock option exercise), and payment method (broker cashless exercise), fulfilling standard disclosure elements. The filer also affirms absence of material nonpublic information. There are no indications of accelerated insider selling patterns in the filing itself, and the form reports no sales in the prior three months.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Charles Schwab & Co., Inc. 3000 Schwab Way, Westlake TX 76262	25000	3518983.00	54324812	09/23/2025	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/23/2025	Employee Stock Option Exercise	MASIMO CORPORATION			25000	09/23/2025	Broker Payment for Cashless Exercise

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the MASI Form 144 disclose about the proposed sale?

The filing discloses a proposed sale of 25,000 common shares with an aggregate market value of $3,518,983.00, planned for 09/23/2025 on NASDAQ through Charles Schwab & Co., Inc.

How were the MASI shares acquired according to the filing?

The shares were acquired on 09/23/2025 via an employee stock option exercise and the payment was processed by the broker as a cashless exercise.

Does the filer report any securities sold in the past three months for MASI?

No. The filing explicitly states "Nothing to Report" for securities sold during the past three months.

Which broker is handling the proposed sale in the MASI Form 144?

The broker named is Charles Schwab & Co., Inc. located at 3000 Schwab Way, Westlake TX 76262.

Does the filer attest to possession of material nonpublic information in the MASI filing?

The filer represents by signing the notice that they do not know any material adverse information about the issuer that has not been publicly disclosed.