MASIMO CORP (MASI)

Latest Insider Confidence Score

2026Q1

50.6
Bullish

Company insider confidence (by quarter)

2015Q1 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Koffey Quentin — 4,589,648 Aug 29, 2025
Politan Capital Management LP — 4,589,648 Aug 29, 2025
Politan Capital Management GP LLC — 4,589,648 Aug 29, 2025
Politan Capital Partners GP LLC — 4,589,648 Aug 29, 2025
Kiani Joe E CEO 378,674 Feb 14, 2023

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Feb 27, 2026 Mar 3, 2026 Young Micah W CFO Sell 100.0 +6,907 37.65% ✗ $1.4M
Feb 26, 2026 Feb 26, 2026 Young Micah W CFO Sell 90.0 +911 5.22% ✗ $196.8K
Feb 12, 2026 Feb 13, 2026 Szyman Catherine M. CEO Neutral 47.5 -4,568 -41.00% ✗ -
Jan 28, 2026 Jan 30, 2026 Sampath Anand EVP, Ops & Clinical Research Sell 8.8 -18,680 -31.35% ✓ $2.6M
Nov 13, 2025 Nov 17, 2025 Ahmed Omar CTIO & EVP of Engineering Neutral 47.5 -974 -22.96% ✗ -
Sep 23, 2025 Sep 25, 2025 Tripodi Blair COO Neutral 47.5 -8,078 -36.89% ✗ -
Sep 3, 2025 Dadswell Charles Director Neutral 52.5 - 0.00% ✗ -
Sep 3, 2025 Dadswell Charles Director Neutral 52.5 - 0.00% ✗ -
Aug 29, 2025 Aug 29, 2025 Politan Capital Management LP Other Neutral 27.5 -126,888 -2.69% ✗ -
Aug 12, 2025 Aug 14, 2025 Brennan Michelle Director Buy 83.8 +200 2.81% ✗ $30.6K
Aug 11, 2025 Aug 12, 2025 Jellison William R Director Buy 97.5 +3,000 167.60% ✗ $437.9K
Aug 11, 2025 Ahmed Omar CTIO & EVP of Engineering Neutral 52.5 - 0.00% ✗ -
Aug 11, 2025 Meehan Greg Allen Chief Commerical Officer Neutral 52.5 - 0.00% ✗ -
Aug 11, 2025 Benner Tim Chief Marketing Officer Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 Aug 11, 2025 Brennan Michelle Director Neutral 52.5 - 0.00% ✗ -
May 12, 2025 May 14, 2025 Muhsin Bilal COO Sell 5.0 -10,000 -29.26% ✓ $1.6M
Apr 29, 2025 May 2, 2025 Solomon Darlene J. S. Director Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 2, 2025 Scannell Timothy J Director Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 2, 2025 LANE WENDY E Director Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 2, 2025 Jellison William R Director Neutral 90.0 +1,790 100.00% ✗ -
Apr 29, 2025 May 1, 2025 Brennan Michelle Director Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 REYNOLDS CRAIG B Director Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Chapek Robert A Director Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Politan Capital Management LP Other Neutral 52.5 - 0.00% ✗ -
Apr 21, 2025 Apr 23, 2025 Hellmann Elisabeth A Chief Human Resources Officer Neutral 52.5 - 0.00% ✗ -
Apr 23, 2025 Hellmann Elisabeth A Chief Human Resources Officer Neutral 52.5 - 0.00% ✗ -
Mar 13, 2025 Mar 14, 2025 Muhsin Bilal COO Neutral 52.5 - 0.00% ✗ -
Mar 14, 2025 Mar 14, 2025 REYNOLDS CRAIG B Director Sell 22.5 -2,053 -11.02% ✓ $341.1K
Mar 11, 2025 Mar 13, 2025 Szyman Catherine M. CEO Neutral 52.5 - 0.00% ✗ -
Mar 11, 2025 Mar 13, 2025 Young Micah W CFO Neutral 52.5 - 0.00% ✗ -
Mar 10, 2025 Mar 12, 2025 Muhsin Bilal COO Sell 3.8 -30,000 -55.38% ✓ $5M
Mar 1, 2025 Mar 4, 2025 Tripodi Blair COO Sell 37.5 -8,104 -54.03% ✗ $1.5M
Mar 1, 2025 Mar 4, 2025 Muhsin Bilal COO Sell 37.5 -8,098 -25.09% ✗ $1.5M
Mar 1, 2025 Mar 4, 2025 Young Micah W CFO Sell 37.5 -8,100 -31.72% ✗ $1.5M
Feb 12, 2025 Feb 14, 2025 Brennan Michelle CEO Sell 97.5 +4,100 333.88% ✗ $864.5K
Feb 12, 2025 Feb 14, 2025 Szyman Catherine M. CEO Neutral 52.5 - 0.00% ✗ -
Feb 14, 2025 Szyman Catherine M. CEO Neutral 52.5 - 0.00% ✗ -
Jan 15, 2025 Jan 17, 2025 Chapek Robert A Director Neutral 52.5 - 0.00% ✗ -
Nov 13, 2024 Nov 15, 2024 Levy Tao EVP, Bus Dev Sell 37.5 -14,398 -34.94% ✗ $2.3M
Nov 11, 2024 Nov 13, 2024 Brennan Michelle CEO Neutral 52.5 - 0.00% ✗ -
Oct 16, 2024 Oct 18, 2024 Scannell Timothy J Director Neutral 52.5 - 0.00% ✗ -
Oct 18, 2024 Scannell Timothy J Director Neutral 52.5 - 0.00% ✗ -
Oct 16, 2024 Oct 18, 2024 LANE WENDY E Director Neutral 52.5 - 0.00% ✗ -
Oct 18, 2024 LANE WENDY E Director Neutral 52.5 - 0.00% ✗ -
Jun 26, 2024 Sep 23, 2024 Politan Capital Management LP Other Neutral 52.5 - 0.00% ✗ -
Sep 19, 2024 Sep 23, 2024 Solomon Darlene J. S. Director Neutral 52.5 - 0.00% ✗ -
Sep 23, 2024 Solomon Darlene J. S. Director Neutral 52.5 - 0.00% ✗ -
Sep 19, 2024 Sep 23, 2024 Jellison William R Director Neutral 52.5 - 0.00% ✗ -
Sep 23, 2024 Jellison William R Director Neutral 52.5 - 0.00% ✗ -
Jun 26, 2024 Sep 23, 2024 Brennan Michelle Director Neutral 52.5 - 0.00% ✗ -
Sep 19, 2024 Sep 23, 2024 REYNOLDS CRAIG B Director Neutral 52.5 - 0.00% ✗ -
Sep 19, 2024 Sep 23, 2024 Chapek Robert A Director Neutral 52.5 - 0.00% ✗ -
Aug 8, 2024 Aug 12, 2024 KIANI JOE E CEO Neutral 52.5 - 0.00% ✗ -
Jun 26, 2024 Jun 28, 2024 REYNOLDS CRAIG B Director Neutral 52.5 - 0.00% ✗ -
May 1, 2024 May 3, 2024 REYNOLDS CRAIG B Director Neutral 58.8 - 0.00% ✓ -
Apr 26, 2024 Apr 30, 2024 REYNOLDS CRAIG B Director Sell 3.8 -40,000 -84.38% ✓ $5.4M
Mar 1, 2024 Mar 1, 2024 Tripodi Blair COO Neutral 52.5 - 0.00% ✗ -
Feb 28, 2024 Mar 1, 2024 Muhsin Bilal COO Sell 90.0 +1,265 7.90% ✗ $95.9K
Feb 28, 2024 Mar 1, 2024 Levy Tao EVP, BUS DEV Sell 90.0 +603 5.69% ✗ $51.6K
Feb 28, 2024 Mar 1, 2024 Young Micah W CFO Sell 86.3 +616 6.21% ✗ $49.9K
Feb 28, 2024 Mar 1, 2024 KIANI JOE E CEO Sell 62.5 +6,121 0.18% ✗ $505.7K
Feb 28, 2024 Mar 1, 2024 McClenahan Thomas Samuel EVP, GEN COUNSEL & CORP SEC Sell 82.5 +610 1.69% ✗ $50.7K
Jan 16, 2024 Jan 16, 2024 Chapek Robert A Director Neutral 52.5 - 0.00% ✗ -
Jan 16, 2024 Chapek Robert A Director Neutral 52.5 - 0.00% ✗ -
Dec 19, 2023 Dec 21, 2023 CLASSON ROLF A Director Neutral 52.5 - 0.00% ✗ -
Nov 7, 2023 CLASSON ROLF A Director Neutral 52.5 - 0.00% ✗ -
Aug 11, 2023 Aug 11, 2023 MASIMO CORP 10% Owner Neutral 52.5 - 0.00% ✗ -
Aug 10, 2023 Aug 10, 2023 MASIMO CORP 10% Owner Neutral 52.5 - 0.00% ✗ -
Aug 8, 2023 MASIMO CORP 10% Owner Neutral 52.5 - 0.00% ✗ -
Jun 26, 2023 Jul 6, 2023 Politan Capital Management LP Other Neutral 52.5 - 0.00% ✗ -
Jul 6, 2023 Politan Capital Management LP Other Neutral 52.5 - 0.00% ✗ -
Jun 26, 2023 Jun 29, 2023 Brennan Michelle Director Neutral 52.5 - 0.00% ✗ -
Jun 29, 2023 Brennan Michelle Director Neutral 52.5 - 0.00% ✗ -
Jun 26, 2023 Jun 28, 2023 Mikkelson Adam Director Neutral 52.5 - 0.00% ✗ -
Jun 26, 2023 Jun 28, 2023 REYNOLDS CRAIG B Director Neutral 52.5 - 0.00% ✗ -
May 26, 2023 May 31, 2023 Shimer Julie Ann Director Neutral 52.5 - 0.00% ✗ -
May 26, 2023 May 31, 2023 REYNOLDS CRAIG B Director Neutral 52.5 - 0.00% ✗ -
May 26, 2023 May 31, 2023 Cohen H Michael Director Neutral 52.5 - 0.00% ✗ -
May 26, 2023 May 31, 2023 Mikkelson Adam Director Neutral 52.5 - 0.00% ✗ -
May 25, 2023 May 30, 2023 KIANI JOE E CEO Buy 65.0 +6,365 0.19% ✗ $1M
Mar 17, 2023 Mar 17, 2023 KIANI JOE E CEO Neutral 52.5 - 0.00% ✗ -
Mar 3, 2023 Mar 7, 2023 KIANI JOE E CEO Sell 77.5 +23,751 0.70% ✗ $4.8M
Mar 3, 2023 Mar 7, 2023 Young Micah W CFO Sell 97.5 +2,353 11.65% ✗ $485.8K
Mar 3, 2023 Mar 7, 2023 Muhsin Bilal COO Sell 97.5 +4,730 19.79% ✗ $967.2K
Mar 3, 2023 Mar 7, 2023 McClenahan Thomas Samuel EVP, GEN COUNSEL & CORP SEC Sell 92.5 +2,348 6.95% ✗ $486.7K
Mar 3, 2023 Mar 7, 2023 Levy Tao EVP, Bus Dev Sell 97.5 +2,344 11.22% ✗ $487.5K
Mar 3, 2023 Mar 7, 2023 Tripodi Blair COO Neutral 52.5 - 0.00% ✗ -
Feb 28, 2023 Hataishi Paul SVP, Chief Accounting Officer Neutral 52.5 - 0.00% ✗ -
Feb 14, 2022 Feb 14, 2023 KIANI JOE E CEO Neutral 47.5 -48,982 -11.45% ✗ -
Dec 15, 2022 Dec 19, 2022 KIANI JOE E CEO Buy 87.5 +7,040 1.45% ✗ $1M
Nov 14, 2022 Nov 15, 2022 KIANI JOE E CEO Buy 95.0 +31,994 7.03% ✗ $4M
Nov 11, 2022 Nov 15, 2022 KIANI JOE E CEO Buy 87.5 +7,784 1.74% ✗ $1M
Sep 26, 2022 Tripodi Blair COO Neutral 52.5 - 0.00% ✗ -
May 26, 2022 May 31, 2022 Shimer Julie Ann Director Neutral 52.5 - 0.00% ✗ -
May 26, 2022 May 31, 2022 REYNOLDS CRAIG B Director Neutral 52.5 - 0.00% ✗ -
May 26, 2022 May 31, 2022 Mikkelson Adam Director Neutral 52.5 - 0.00% ✗ -
May 26, 2022 May 31, 2022 Cohen H Michael Director Neutral 52.5 - 0.00% ✗ -
Apr 11, 2022 Apr 14, 2022 Duffy Kevin P President Neutral 52.5 - 0.00% ✗ -
Apr 14, 2022 Duffy Kevin P President Neutral 52.5 - 0.00% ✗ -
Feb 22, 2022 Feb 24, 2022 Levy Tao EVP, Bus Dev Neutral 52.5 - 0.00% ✗ -