Masimo Corp (MASI) Insider Ownership

Historic Insider Ownership Trends

As of June 18, 2026, Masimo's top three insider holders are Capital Management Lp Politan (Other, 4.59Mn shares), Joe E Kiani (Ceo And Chairman Of The Board, 603.92K shares), Joe E Kiani (Ceo And Chairman Of The Board, 46.82K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Craig B Reynolds - 18,371 0 01 May, 2025
William R Jellison - 4,790 0 12 Aug, 2025
Wendy E Lane - 1,383 0 01 May, 2025
Joe E Kiani Ceo And Chairman Of The Board 603,924 0 12 Aug, 2024
Julie Ann Shimer - 4,410 0 31 May, 2023
Anand Sampath Evp, Ops Clinical Research 40,909 0 30 Jan, 2026
Catherine M. Szyman Ceo 7,605 0 16 Mar, 2026
Timothy J Scannell - 1,383 0 01 May, 2025
Darlene J. S. Solomon - 1,790 0 01 May, 2025
Thomas Samuel Mcclenahan Evp, Gen Counsel Corp Sec 36,747 0 01 Mar, 2024
Adam Mikkelson - 4,108 0 31 May, 2023
Micah W Young Evp Chief Financial Officer 25,656 0 16 Mar, 2026
Tao Levy Evp, Bus Dev 26,810 0 15 Nov, 2024
Bilal Muhsin Chief Operating Officer 24,172 0 14 May, 2025
H Michael Cohen - 3,823 0 31 May, 2023
Robert A Chapek - 3,455 0 01 May, 2025
Michelle Brennan Interim Ceo 7,318 0 14 Aug, 2025
Capital Management Lp Politan - 0 4,589,648 29 Aug, 2025
Blair Tripodi Coo, Consumer Division 13,818 0 25 Sep, 2025
Omar Ahmed Ctio Evp Of Engineering 3,268 0 17 Nov, 2025

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
11 Mar, 2026 Micah W Young Common Stock A 873 $0.00 26,127 D M
11 Mar, 2026 Micah W Young Common Stock A 873 $0.00 26,127 D M
11 Mar, 2026 Catherine M. Szyman Common Stock A 2,101 $0.00 8,674 D M
11 Mar, 2026 Catherine M. Szyman Common Stock A 2,101 $0.00 8,674 D M
11 Mar, 2026 Catherine M. Szyman Common Stock D 1,069 $175.47 7,605 D F
11 Mar, 2026 Catherine M. Szyman Common Stock D 1,069 $175.47 7,605 D F
11 Mar, 2026 Micah W Young Common Stock D 471 $175.47 25,656 D F
11 Mar, 2026 Micah W Young Common Stock D 471 $175.47 25,656 D F
11 Mar, 2026 Catherine M. Szyman Restricted Stock Units D 2,101 $0.00 6,306 D M
11 Mar, 2026 Micah W Young Restricted Stock Units D 873 $0.00 2,622 D M
11 Mar, 2026 Micah W Young Restricted Stock Units D 873 $0.00 2,622 D M
11 Mar, 2026 Catherine M. Szyman Restricted Stock Units D 2,101 $0.00 6,306 D M
11 Mar, 2026 Capital Management Lp Politan Forward Sale Contract (obligation to sell) A 142,681 - 142,681 I J
11 Mar, 2026 Capital Management Lp Politan Forward Sale Contract (obligation to sell) A 142,681 - 142,681 I J
12 Mar, 2026 Capital Management Lp Politan Forward Sale Contract (obligation to sell) A 130,869 - 130,869 I J
12 Mar, 2026 Capital Management Lp Politan Forward Sale Contract (obligation to sell) A 130,869 - 130,869 I J
06 Mar, 2026 Micah W Young Restricted Stock Units A 17,671 $0.00 17,671 D A
06 Mar, 2026 Greg Allen Meehan Restricted Stock Units A 8,550 $0.00 8,550 D A
06 Mar, 2026 Elisabeth A Hellmann Restricted Stock Units A 5,985 $0.00 5,985 D A
06 Mar, 2026 Charles Dadswell Restricted Stock Units A 10,261 $0.00 10,261 D A