There have been 50 recent insider transactions recorded for Masimo Corporation (MASI), including 19 buys and 25 sells. Total insider buying was valued at $468.5K and total insider selling at $4.68M.
Notable insiders with recent activity include Politan Capital Management Lp, Szyman Catherine M., Young Micah W. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — MASI
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-03-12 |
Politan Capital Management Lp |
Other: Director By Deputization |
Other (Buy) |
130,869 |
- |
- |
130,869 |
| 2026-03-11 |
Politan Capital Management Lp |
Other: Director By Deputization |
Other (Buy) |
142,681 |
- |
- |
142,681 |
| 2026-03-11 |
Szyman Catherine M. |
CEO |
Option Exercise (Sell) |
2,101 |
- |
- |
6,306 |
| 2026-03-11 |
Young Micah W |
EVP & Chief Financial Officer |
Option Exercise (Sell) |
873 |
- |
- |
2,622 |
| 2026-03-06 |
Sampath Anand |
EVP, Operations |
RSU Award |
6,840 |
- |
- |
6,840 |
| 2026-03-06 |
Szyman Catherine M. |
CEO |
RSU Award |
39,904 |
- |
- |
39,904 |
| 2026-03-06 |
Dadswell Charles |
EVP, General Counsel |
RSU Award |
10,261 |
- |
- |
10,261 |
| 2026-03-06 |
Young Micah W |
EVP & Chief Financial Officer |
RSU Award |
17,671 |
- |
- |
17,671 |
| 2026-03-06 |
Benner Tim |
Chief Marketing Officer |
RSU Award |
6,128 |
- |
- |
6,128 |
| 2026-03-06 |
Hellmann Elisabeth A |
Chief Human Resources Officer |
RSU Award |
5,985 |
- |
- |
5,985 |
| 2026-03-06 |
Meehan Greg Allen |
Chief Commerical Officer |
RSU Award |
8,550 |
- |
- |
8,550 |
| 2026-02-27 |
Young Micah W |
EVP & Chief Financial Officer |
Option Exercise (Sell) |
15,000 |
- |
- |
- |
| 2026-02-26 |
Young Micah W |
EVP & Chief Financial Officer |
Tax Withholding of RSU |
1,123 |
$175.22 |
$196.77K |
18,347 |
| 2026-02-12 |
Szyman Catherine M. |
CEO |
Tax Withholding of RSU |
4,568 |
- |
- |
6,573 |
| 2026-01-28 |
Sampath Anand |
EVP, Ops & Clinical Research |
Option Exercise (Sell) |
30,000 |
$37.84 |
$1.14M |
- |
| 2025-11-13 |
Ahmed Omar |
Ctio & EVP of Engineering |
Option Exercise (Sell) |
2,474 |
- |
- |
- |
| 2025-09-23 |
Tripodi Blair |
COO, Consumer Division |
Option Exercise (Sell) |
15,000 |
- |
- |
- |
| 2025-08-29 |
Politan Capital Management Lp |
Other: Director By Deputization |
Other (Sell) |
126,888 |
- |
- |
4,589,648 |
| 2025-08-18 |
Dadswell Charles |
Director |
Unknown |
- |
- |
- |
- |
| 2025-08-13 |
Brennan Michelle |
Other: Chairman of the Board |
Informative Buy |
100 |
$155.25 |
$15.53K |
7,318 |
| 2025-08-12 |
Brennan Michelle |
Other: Chairman of the Board |
Informative Buy |
100 |
$150.35 |
$15.04K |
7,218 |
| 2025-08-11 |
Jellison William R |
Director |
Informative Buy |
3,000 |
$145.98 |
$437.94K |
4,790 |
| 2025-07-31 |
Benner Tim |
Chief Marketing Officer |
Unknown |
1,163 |
- |
- |
- |
| 2025-07-31 |
Ahmed Omar |
Ctio & EVP of Engineering |
Unknown |
1,316 |
- |
- |
- |
| 2025-07-31 |
Meehan Greg Allen |
Chief Commerical Officer |
Unknown |
1,933 |
- |
- |
- |
| 2025-05-12 |
Muhsin Bilal |
Chief Operating Officer |
Option Exercise (Sell) |
10,000 |
$34.51 |
$345.1K |
- |
| 2025-04-29 |
Brennan Michelle |
Other: Chairman of the Board |
RSU Award |
766 |
- |
- |
766 |
| 2025-04-29 |
Reynolds Craig B |
Director |
Option Exercise (Sell) |
1,790 |
- |
- |
- |
| 2025-04-29 |
Chapek Robert A |
Director |
Option Exercise (Sell) |
1,790 |
- |
- |
- |
| 2025-04-29 |
Brennan Michelle |
Other: Chairman of the Board |
Option Exercise (Sell) |
1,790 |
- |
- |
- |
| 2025-04-29 |
Politan Capital Management Lp |
Other: Director By Deputization |
Option Exercise (Sell) |
1,790 |
- |
- |
- |
| 2025-04-29 |
Jellison William R |
Director |
Option Exercise (Sell) |
1,790 |
- |
- |
- |
| 2025-04-29 |
Lane Wendy E |
Director |
Option Exercise (Sell) |
1,383 |
- |
- |
- |
| 2025-04-29 |
Scannell Timothy J |
Director |
Option Exercise (Sell) |
1,383 |
- |
- |
- |
| 2025-04-29 |
Solomon Darlene J. S. |
Director |
Option Exercise (Sell) |
1,790 |
- |
- |
- |
| 2025-04-21 |
Hellmann Elisabeth A |
Officer |
Unknown |
- |
- |
- |
- |
| 2025-04-21 |
Hellmann Elisabeth A |
Chief Human Resources Officer |
RSU Award |
1,340 |
- |
- |
1,340 |
| 2025-03-14 |
Reynolds Craig B |
Director |
Informative Sell |
2,053 |
$166.13 |
$341.07K |
16,581 |
| 2025-03-13 |
Muhsin Bilal |
Chief Operating Officer |
RSU Award |
3,512 |
- |
- |
3,512 |
| 2025-03-11 |
Szyman Catherine M. |
CEO |
RSU Award |
8,407 |
- |
- |
8,407 |
| 2025-03-11 |
Young Micah W |
EVP & Chief Financial Officer |
RSU Award |
3,495 |
- |
- |
3,495 |
| 2025-03-10 |
Muhsin Bilal |
Chief Operating Officer |
Option Exercise (Sell) |
30,000 |
$37.84 |
$1.14M |
- |
| 2025-03-01 |
Young Micah W |
EVP & Chief Financial Officer |
Option Exercise (Sell) |
15,000 |
- |
- |
15,000 |
| 2025-03-01 |
Muhsin Bilal |
Chief Operating Officer |
Option Exercise (Sell) |
15,000 |
- |
- |
15,000 |
| 2025-03-01 |
Tripodi Blair |
COO, Consumer Division |
Tax Withholding of RSU |
8,104 |
$188.77 |
$1.53M |
6,896 |
| 2025-02-12 |
Szyman Catherine M. |
CEO |
Unknown |
- |
- |
- |
- |
| 2025-02-12 |
Szyman Catherine M. |
CEO |
RSU Award |
33,424 |
- |
- |
33,424 |
| 2025-02-12 |
Brennan Michelle |
Interim CEO |
Option Exercise (Sell) |
8,916 |
- |
- |
- |
| 2025-01-15 |
Chapek Robert A |
Director |
Option Exercise |
1,665 |
- |
- |
1,665 |
| 2024-11-13 |
Levy Tao |
EVP, Bus Dev |
Option Exercise (Sell) |
30,000 |
- |
- |
- |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
