[144] MASIMO CORP SEC Filing

Rhea-AI Filing Summary

Form 144 notice for MASIMO CORP (MASI) indicates a proposed sale of 50,000 common shares acquired and to be sold on 09/26/2025 following an employee stock option exercise. The broker listed is Charles Schwab & Co., Inc. with an aggregate market value of $7,093,910.00 and the issuer's shares outstanding reported as 54,324,812. The filing shows a prior sale by the same person on 09/23/2025 of 25,000 shares for gross proceeds of $3,518,983.00. The filer certifies they are unaware of undisclosed material adverse information.

Insights

Securities Analyst

TL;DR: Routine insider sale following option exercise; size is modest relative to outstanding shares.

The notice documents a planned sale of 50,000 common shares acquired through an employee option exercise on the same date, with proceeds represented by a cashless exercise via broker Charles Schwab. The aggregate market value reported is $7,093,910 against 54.3 million shares outstanding, representing approximately 0.09% of outstanding shares, indicating limited dilution or market impact. A prior sale of 25,000 shares on 09/23/2025 produced $3,518,983 in gross proceeds, consistent with routine liquidity events by insiders.

Compliance/Risk Analyst

TL;DR: Filing appears compliant and includes required representations; no material nonpublic information is disclosed.

The form contains the standard attestation that the seller does not possess undisclosed material adverse information and identifies the broker, sale date, acquisition method, and payment type (cashless exercise). The record of a recent sale within three days is provided. No regulatory exceptions or anomalies are evident in the submitted fields shown.

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	50000	7093910.00	54324812	09/26/2025	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	09/26/2025	Employee Stock Option Exercise	MASIMO CORPORATION			50000	09/26/2025	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Bilal Muhsin 52 DISCOVERY IRVINE CA 92618	MASIMO CORP	09/23/2025	25000	3518983.00

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)