STOCK TITAN

[Form 4] Masimo Corporation Insider Trading Activity

Filing Impact
(Neutral)
Filing Sentiment
(Positive)
Form Type
4
Rhea-AI Filing Summary

Masimo Corporation director William R. Jellison reported an open-market purchase of common stock on 08/11/2025. The Form 4 shows a purchase of 3,000 shares at a weighted average price of $145.98 per share; the reported purchase prices ranged from $145.84 to $146.00. After the transaction the reporting person beneficially owned 4,790 shares, held in a direct form of ownership.

The filing includes an explanation that the reported price is a weighted average of open market trades and the reporting person offers to provide full transaction details on request. The transaction is recorded with code P indicating a purchase; no derivative transactions are reported.

Il membro del consiglio di amministrazione di Masimo Corporation, William R. Jellison, ha dichiarato un acquisto in mercato aperto di azioni ordinarie in data 08/11/2025. Il Form 4 indica l'acquisto di 3,000 azioni a un prezzo medio ponderato di $145.98 per azione; i prezzi riportati variano da $145.84 a $146.00. Dopo la transazione la persona che ha presentato la comunicazione possedeva beneficiariamente 4,790 azioni, detenute in forma di proprietà diretta.

La dichiarazione specifica che il prezzo segnalato è una media ponderata delle operazioni sul mercato aperto e che la persona che ha presentato l'informativa si rende disponibile a fornire i dettagli completi della transazione su richiesta. L'operazione è registrata con il codice P, che indica un acquisto; non sono riportate transazioni con derivati.

El director de Masimo Corporation, William R. Jellison, informó una compra en mercado abierto de acciones ordinarias el 08/11/2025. El Form 4 muestra la compra de 3,000 acciones a un precio medio ponderado de $145.98 por acción; los precios informados oscilaron entre $145.84 y $146.00. Tras la operación, la persona informante poseía beneficiariamente 4,790 acciones, en forma de propiedad directa.

La presentación incluye la explicación de que el precio informado es un promedio ponderado de operaciones en el mercado abierto y que la persona informante se ofrece a facilitar los detalles completos de la transacción si se solicitan. La operación está registrada con el código P, que indica una compra; no se informan transacciones con derivados.

Masimo Corporation 이사 William R. Jellison08/11/2025에 보통주를 공개시장 매수했다고 보고했습니다. Form 4에는 주당 가중평균 가격 $145.983,000주를 매수한 것으로 기재되어 있으며, 보고된 매수 가격은 $145.84에서 $146.00 사이입니다. 거래 후 보고인은 직접 소유 형태로 4,790주를 실질적으로 보유하게 되었습니다.

신고서에는 보고된 가격이 공개시장 거래의 가중평균임을 설명하고 있으며, 보고인은 요청 시 전체 거래 내역을 제공하겠다고 밝혔습니다. 이 거래는 매수를 나타내는 코드 P로 기록되어 있으며, 파생상품 거래는 보고되지 않았습니다.

Le dirigeant de Masimo Corporation, William R. Jellison, a déclaré un achat en marché ouvert d'actions ordinaires le 08/11/2025. Le Form 4 indique l'achat de 3,000 actions à un prix moyen pondéré de $145.98 par action ; les prix déclarés variaient de $145.84 à $146.00. Après la transaction, la personne déclarante détenait en bénéficiaire 4,790 actions, en propriété directe.

Le dépôt précise que le prix déclaré est une moyenne pondérée des transactions sur le marché ouvert et que la personne déclarante se propose de fournir les détails complets de la transaction sur demande. La transaction est enregistrée avec le code P indiquant un achat ; aucune opération sur produits dérivés n'est déclarée.

Masimo Corporation-Direktor William R. Jellison meldete einen Freiverkehrskauf von Stammaktien am 08/11/2025. Das Form 4 weist den Erwerb von 3,000 Aktien zu einem gewogenen Durchschnittspreis von $145.98 pro Aktie aus; die gemeldeten Kaufpreise lagen zwischen $145.84 und $146.00. Nach der Transaktion besaß die meldende Person wirtschaftlich 4,790 Aktien, gehalten in unmittelbarem Eigentum.

Die Meldung erklärt, dass der angegebene Preis ein gewogener Durchschnitt von Trades im offenen Markt ist, und die meldende Person bietet an, auf Anfrage vollständige Transaktionsdetails bereitzustellen. Die Transaktion ist mit dem Code P erfasst, der einen Kauf kennzeichnet; derivative Transaktionen werden nicht gemeldet.

Positive
  • Director William R. Jellison purchased 3,000 shares, increasing direct beneficial ownership to 4,790 shares.
  • Transaction pricing disclosed with a weighted average of $145.98 and per-trade range of $145.84–$146.00.
Negative
  • None.

Insights

TL;DR: A director executed an open-market purchase of 3,000 MASI shares at about $146, modest insider buying that increases direct stake to 4,790 shares.

The Form 4 documents an open-market purchase (transaction code "P") of 3,000 common shares on 08/11/2025 with a weighted average price of $145.98 and individual trade prices between $145.84 and $146.00. The purchase raised direct beneficial ownership to 4,790 shares. The filer supplies the weighted-average price and offers to provide detailed trade-level information on request. There are no derivative transactions disclosed.

TL;DR: Director-level insider buying recorded; disclosure is routine and complete for an open-market purchase, showing direct ownership increase.

The filing clearly identifies the reporting person as a director and records the acquisition as a direct purchase. It provides the weighted average and the per-trade price range, and reports the resulting beneficial ownership of 4,790 shares. The form contains required explanatory language about the reported weighted average price. No 10b5-1 plan or derivative activity is described in the transaction tables.

Il membro del consiglio di amministrazione di Masimo Corporation, William R. Jellison, ha dichiarato un acquisto in mercato aperto di azioni ordinarie in data 08/11/2025. Il Form 4 indica l'acquisto di 3,000 azioni a un prezzo medio ponderato di $145.98 per azione; i prezzi riportati variano da $145.84 a $146.00. Dopo la transazione la persona che ha presentato la comunicazione possedeva beneficiariamente 4,790 azioni, detenute in forma di proprietà diretta.

La dichiarazione specifica che il prezzo segnalato è una media ponderata delle operazioni sul mercato aperto e che la persona che ha presentato l'informativa si rende disponibile a fornire i dettagli completi della transazione su richiesta. L'operazione è registrata con il codice P, che indica un acquisto; non sono riportate transazioni con derivati.

El director de Masimo Corporation, William R. Jellison, informó una compra en mercado abierto de acciones ordinarias el 08/11/2025. El Form 4 muestra la compra de 3,000 acciones a un precio medio ponderado de $145.98 por acción; los precios informados oscilaron entre $145.84 y $146.00. Tras la operación, la persona informante poseía beneficiariamente 4,790 acciones, en forma de propiedad directa.

La presentación incluye la explicación de que el precio informado es un promedio ponderado de operaciones en el mercado abierto y que la persona informante se ofrece a facilitar los detalles completos de la transacción si se solicitan. La operación está registrada con el código P, que indica una compra; no se informan transacciones con derivados.

Masimo Corporation 이사 William R. Jellison08/11/2025에 보통주를 공개시장 매수했다고 보고했습니다. Form 4에는 주당 가중평균 가격 $145.983,000주를 매수한 것으로 기재되어 있으며, 보고된 매수 가격은 $145.84에서 $146.00 사이입니다. 거래 후 보고인은 직접 소유 형태로 4,790주를 실질적으로 보유하게 되었습니다.

신고서에는 보고된 가격이 공개시장 거래의 가중평균임을 설명하고 있으며, 보고인은 요청 시 전체 거래 내역을 제공하겠다고 밝혔습니다. 이 거래는 매수를 나타내는 코드 P로 기록되어 있으며, 파생상품 거래는 보고되지 않았습니다.

Le dirigeant de Masimo Corporation, William R. Jellison, a déclaré un achat en marché ouvert d'actions ordinaires le 08/11/2025. Le Form 4 indique l'achat de 3,000 actions à un prix moyen pondéré de $145.98 par action ; les prix déclarés variaient de $145.84 à $146.00. Après la transaction, la personne déclarante détenait en bénéficiaire 4,790 actions, en propriété directe.

Le dépôt précise que le prix déclaré est une moyenne pondérée des transactions sur le marché ouvert et que la personne déclarante se propose de fournir les détails complets de la transaction sur demande. La transaction est enregistrée avec le code P indiquant un achat ; aucune opération sur produits dérivés n'est déclarée.

Masimo Corporation-Direktor William R. Jellison meldete einen Freiverkehrskauf von Stammaktien am 08/11/2025. Das Form 4 weist den Erwerb von 3,000 Aktien zu einem gewogenen Durchschnittspreis von $145.98 pro Aktie aus; die gemeldeten Kaufpreise lagen zwischen $145.84 und $146.00. Nach der Transaktion besaß die meldende Person wirtschaftlich 4,790 Aktien, gehalten in unmittelbarem Eigentum.

Die Meldung erklärt, dass der angegebene Preis ein gewogener Durchschnitt von Trades im offenen Markt ist, und die meldende Person bietet an, auf Anfrage vollständige Transaktionsdetails bereitzustellen. Die Transaktion ist mit dem Code P erfasst, der einen Kauf kennzeichnet; derivative Transaktionen werden nicht gemeldet.

SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Jellison William R

(Last) (First) (Middle)
C/O MASIMO CORPORATION
52 DISCOVERY

(Street)
IRVINE CA 92618

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
MASIMO CORP [ MASI ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
08/11/2025
4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 08/11/2025 P 3,000 A $145.98(1) 4,790 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
1. The price reported in Column 4 represents the weighted average price per share of open market purchase transactions. The actual purchase prices ranged from a low of $145.84 per share to a high of $146.00 per share. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.
Remarks:
/s/ Micah W. Young, Attorney-In-Fact 08/12/2025
** 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 4 (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 transaction did the Masimo (MASI) Form 4 disclose?

The Form 4 reports an open-market purchase (transaction code P) of 3,000 common shares on 08/11/2025.

Who is the reporting person on the MASI Form 4?

The reporting person is William R. Jellison, identified in the filing as a Director.

What price was paid per share in the MASI insider purchase?

The weighted average price reported is $145.98 per share; individual purchase prices ranged from $145.84 to $146.00.

How many MASI shares does the reporting person own after the transaction?

Following the purchase the reporting person beneficially owned 4,790 shares, held directly.

Were any derivative securities reported on the MASI Form 4?

No derivative securities are listed in Table II; only a non-derivative purchase of common stock is reported.
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