MASI
insider transactionsMASIMO CORP — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
No open-market buys or sells this period. The trades below are grants, option exercises and gifts, which carry no market price.
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Other·D
Director
—
1.1K sh
Own -100%
-
Other·D
Director
$542.7K
3.0K sh · $180.00
Own -100%
-
Other·D
Director
—
1.1K sh
Own -100%
-
Other·D
Director
$469.4K
2.6K sh · $180.00
Own -100%
-
Other·D
EVP, Operations
$86.6K
3.9K sh · $22.47
Own -100%
-
Other·D
EVP, Operations
$2.6K
4.4K sh · $0.58
Own -100%
-
Other·D
EVP, Operations
$336.4K
7.2K sh · $46.50
Own -100%
-
Other·D
EVP, Operations
$930.5K
10.0K sh · $93.05
Own -100%
-
Other·D
EVP, Operations
$891.3K
10.0K sh · $89.13
Own -100%
-
Other·D
EVP, Operations
—
6.8K sh
Own -100%
-
Other·D
EVP, Operations
—
4.8K sh
Own -100%
-
Other·D
EVP, Operations
—
5.2K sh
Own -100%
-
Other·D
EVP, Operations
—
1.8K sh
Own -100%
-
Other·D
EVP, Operations
$6.1M
33.9K sh · $180.00
Own -100%
-
Other·D
Chief Commercial Officer
$1.0M
5.8K sh · $180.00
Own -100%
-
Other·D
Chief Commercial Officer
$107.1K
4.3K sh · $24.87
Own -100%
-
Other·D
Chief Commercial Officer
—
8.6K sh
Own -100%
-
Other·D
Chief Commercial Officer
—
1.9K sh
Own -100%
-
Other·D
Micah W Young KEY
EVP, Chief Financial Officer
$1.9M
10.5K sh · $180.00
Own -100%
-
Other·D
Micah W Young KEY
EVP, Chief Financial Officer
$3.0M
16.9K sh · $180.00
Own -100%
-
Other·D
Micah W Young KEY
EVP, Chief Financial Officer
$104.3K
7.7K sh · $13.48
Own -100%
-
Other·D
Micah W Young KEY
EVP, Chief Financial Officer
$639.7K
12.0K sh · $53.51
Own -100%
-
Other·D
Micah W Young KEY
EVP, Chief Financial Officer
$143.0K
6.4K sh · $22.47
Own -100%
-
Other·D
Micah W Young KEY
EVP, Chief Financial Officer
$3.8K
6.6K sh · $0.58
Own -100%
-
Other·D
Micah W Young KEY
EVP, Chief Financial Officer
$269.1K
5.8K sh · $46.50
Own -100%
-
Other·D
Micah W Young KEY
EVP, Chief Financial Officer
$388.5K
4.2K sh · $93.05
Own -100%
-
Other·D
Micah W Young KEY
EVP, Chief Financial Officer
$1.9M
20.0K sh · $95.03
Own -100%
-
Other·D
Micah W Young KEY
EVP, Chief Financial Officer
—
17.7K sh
Own -100%
-
Other·D
Micah W Young KEY
EVP, Chief Financial Officer
—
2.6K sh
Own -100%
-
Other·D
Micah W Young KEY
EVP, Chief Financial Officer
$4.6M
25.7K sh · $180.00
Own -100%
-
Other·D
Chief Executive Officer
$8.9M
49.2K sh · $180.00
Own -100%
-
Other·D
Chief Executive Officer
$251.0K
18.6K sh · $13.48
Own -100%
-
Other·D
Chief Executive Officer
—
39.9K sh
Own -100%
-
Other·D
Chief Executive Officer
—
6.3K sh
Own -100%
-
Other·D
Chief Executive Officer
—
22.3K sh
Own -100%
-
Other·D
Chief Executive Officer
$1.4M
7.6K sh · $180.00
Own -100%
-
Other·D
Director
—
1.1K sh
Own -100%
-
Other·D
Director
$469.4K
2.6K sh · $180.00
Own -100%
-
Other·J
-
Other·J
-
Other·D
-
Other·D
$826.4M
4.6M sh · $180.00
Own -100%
-
Other·D
Chief Human Resources Officer
$723.6K
4.0K sh · $180.00
Own -100%
-
Other·D
Chief Human Resources Officer
$88.4K
2.9K sh · $30.76
Own -100%
-
Other·D
Chief Human Resources Officer
—
6.0K sh
Own -100%
-
Other·D
Chief Human Resources Officer
—
1.0K sh
Own -100%
-
Other·D
Chief Human Resources Officer
$38.5K
214 sh · $180.00
Own -100%
-
Other·D
SVP, Chief Accounting Officer
—
3.1K sh
Own -100%
-
Other·D
SVP, Chief Accounting Officer
—
3.4K sh
Own -100%
-
Other·D
SVP, Chief Accounting Officer
—
3.2K sh
Own -100%
-
Other·D
SVP, Chief Accounting Officer
—
910 sh
Own -100%
-
Other·D
SVP, Chief Accounting Officer
—
627 sh
Own -100%
-
Other·D
SVP, Chief Accounting Officer
$2.4M
13.3K sh · $180.00
Own -100%
-
Other·D
EVP, General Counsel
—
10.3K sh
Own -100%
-
Other·D
EVP, General Counsel
—
11.9K sh
Own -100%
-
Other·D
Director
—
1.1K sh
Own -100%
-
Other·D
Director
$1.7M
9.3K sh · $180.00
Own -100%
-
Other·D
Chief Marketing Officer
$628.2K
3.5K sh · $180.00
Own -100%
-
Other·D
Chief Marketing Officer
$20.6K
2.5K sh · $8.12
Own -100%
-
Other·D
Chief Marketing Officer
—
6.1K sh
Own -100%
-
Other·D
Chief Marketing Officer
—
1.2K sh
Own -100%
-
Exercise·M
Director
$0
1.2K sh
Own New
-
Exercise·M
Director
$0
1.2K sh
Own +89%
-
Exercise·M
Director
$0
1.2K sh
Own New
-
Exercise·M
Director
$0
1.2K sh
Own +89%
-
Exercise·M
Director
$0
1.2K sh
Own New
-
Exercise·M
Director
$0
1.2K sh
Own +17%
-
Grant·A
Director
$200.0K
1.1K sh · $178.71
Own +100%
-
Grant·A
Director
$200.0K
1.1K sh · $178.71
Own +100%
-
Grant·A
Director
$200.0K
1.1K sh · $178.71
Own +100%
-
Exercise·M
Chief Human Resources Officer
$0
335 sh
Own +50%
-
Other·F
Chief Human Resources Officer
$21.6K
121 sh · $178.43
Own -36%
-
Exercise·M
Chief Human Resources Officer
$0
335 sh
Own New
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 10, 2026 | Darlene J. S. Solomon | Other D | 1.1K | — |
| Jun 10, 2026 | Darlene J. S. Solomon | Other D | 3.0K | $542.7K |
| Jun 10, 2026 | Timothy J Scannell | Other D | 1.1K | — |
| Jun 10, 2026 | Timothy J Scannell | Other D | 2.6K | $469.4K |
| Jun 10, 2026 | Anand Sampath | Other D | 3.9K | $86.6K |
| Jun 10, 2026 | Anand Sampath | Other D | 4.4K | $2.6K |
| Jun 10, 2026 | Anand Sampath | Other D | 7.2K | $336.4K |
| Jun 10, 2026 | Anand Sampath | Other D | 10.0K | $930.5K |
| Jun 10, 2026 | Anand Sampath | Other D | 10.0K | $891.3K |
| Jun 10, 2026 | Anand Sampath | Other D | 6.8K | — |
| Jun 10, 2026 | Anand Sampath | Other D | 4.8K | — |
| Jun 10, 2026 | Anand Sampath | Other D | 5.2K | — |
| Jun 10, 2026 | Anand Sampath | Other D | 1.8K | — |
| Jun 10, 2026 | Anand Sampath | Other D | 33.9K | $6.1M |
| Jun 10, 2026 | Greg Allen Meehan | Other D | 5.8K | $1.0M |
| Jun 10, 2026 | Greg Allen Meehan | Other D | 4.3K | $107.1K |
| Jun 10, 2026 | Greg Allen Meehan | Other D | 8.6K | — |
| Jun 10, 2026 | Greg Allen Meehan | Other D | 1.9K | — |
| Jun 10, 2026 | Micah W Young KEY | Other D | 10.5K | $1.9M |
| Jun 10, 2026 | Micah W Young KEY | Other D | 16.9K | $3.0M |
| Jun 10, 2026 | Micah W Young KEY | Other D | 7.7K | $104.3K |
| Jun 10, 2026 | Micah W Young KEY | Other D | 12.0K | $639.7K |
| Jun 10, 2026 | Micah W Young KEY | Other D | 6.4K | $143.0K |
| Jun 10, 2026 | Micah W Young KEY | Other D | 6.6K | $3.8K |
| Jun 10, 2026 | Micah W Young KEY | Other D | 5.8K | $269.1K |
| Jun 10, 2026 | Micah W Young KEY | Other D | 4.2K | $388.5K |
| Jun 10, 2026 | Micah W Young KEY | Other D | 20.0K | $1.9M |
| Jun 10, 2026 | Micah W Young KEY | Other D | 17.7K | — |
| Jun 10, 2026 | Micah W Young KEY | Other D | 2.6K | — |
| Jun 10, 2026 | Micah W Young KEY | Other D | 25.7K | $4.6M |
| Jun 10, 2026 | Catherine M. Szyman KEY | Other D | 49.2K | $8.9M |
| Jun 10, 2026 | Catherine M. Szyman KEY | Other D | 18.6K | $251.0K |
| Jun 10, 2026 | Catherine M. Szyman KEY | Other D | 39.9K | — |
| Jun 10, 2026 | Catherine M. Szyman KEY | Other D | 6.3K | — |
| Jun 10, 2026 | Catherine M. Szyman KEY | Other D | 22.3K | — |
| Jun 10, 2026 | Catherine M. Szyman KEY | Other D | 7.6K | $1.4M |
| Jun 10, 2026 | Wendy E Lane | Other D | 1.1K | — |
| Jun 10, 2026 | Wendy E Lane | Other D | 2.6K | $469.4K |
| Jun 10, 2026 | Politan Capital Management LP / Politan Capital Management GP LLC / Politan Capital Partners GP LLC / Quentin Koffey | Other J | 130.9K | — |
| Jun 10, 2026 | Politan Capital Management LP / Politan Capital Management GP LLC / Politan Capital Partners GP LLC / Quentin Koffey | Other J | 142.7K | — |
| Jun 10, 2026 | Politan Capital Management LP / Quentin Koffey / Politan Capital Partners GP LLC / Politan Capital Management GP LLC | Other D | 1.1K | — |
| Jun 10, 2026 | Politan Capital Management LP / Quentin Koffey / Politan Capital Partners GP LLC / Politan Capital Management GP LLC | Other D | 4.6M | $826.4M |
| Jun 10, 2026 | Elisabeth A Hellmann | Other D | 4.0K | $723.6K |
| Jun 10, 2026 | Elisabeth A Hellmann | Other D | 2.9K | $88.4K |
| Jun 10, 2026 | Elisabeth A Hellmann | Other D | 6.0K | — |
| Jun 10, 2026 | Elisabeth A Hellmann | Other D | 1.0K | — |
| Jun 10, 2026 | Elisabeth A Hellmann | Other D | 214 | $38.5K |
| Jun 10, 2026 | Paul Hataishi | Other D | 3.1K | — |
| Jun 10, 2026 | Paul Hataishi | Other D | 3.4K | — |
| Jun 10, 2026 | Paul Hataishi | Other D | 3.2K | — |
| Jun 10, 2026 | Paul Hataishi | Other D | 910 | — |
| Jun 10, 2026 | Paul Hataishi | Other D | 627 | — |
| Jun 10, 2026 | Paul Hataishi | Other D | 13.3K | $2.4M |
| Jun 10, 2026 | Charles Dadswell | Other D | 10.3K | — |
| Jun 10, 2026 | Charles Dadswell | Other D | 11.9K | — |
| Jun 10, 2026 | Michelle Brennan | Other D | 1.1K | — |
| Jun 10, 2026 | Michelle Brennan | Other D | 9.3K | $1.7M |
| Jun 10, 2026 | Tim Benner | Other D | 3.5K | $628.2K |
| Jun 10, 2026 | Tim Benner | Other D | 2.5K | $20.6K |
| Jun 10, 2026 | Tim Benner | Other D | 6.1K | — |
| Jun 10, 2026 | Tim Benner | Other D | 1.2K | — |
| Apr 29, 2026 | Timothy J Scannell | Exercise M | 1.2K | $0 |
| Apr 29, 2026 | Timothy J Scannell | Exercise M | 1.2K | $0 |
| Apr 29, 2026 | Wendy E Lane | Exercise M | 1.2K | $0 |
| Apr 29, 2026 | Wendy E Lane | Exercise M | 1.2K | $0 |
| Apr 29, 2026 | Michelle Brennan | Exercise M | 1.2K | $0 |
| Apr 29, 2026 | Michelle Brennan | Exercise M | 1.2K | $0 |
| Apr 23, 2026 | Timothy J Scannell | Grant A | 1.1K | $200.0K |
| Apr 23, 2026 | Wendy E Lane | Grant A | 1.1K | $200.0K |
| Apr 23, 2026 | Michelle Brennan | Grant A | 1.1K | $200.0K |
| Apr 21, 2026 | Elisabeth A Hellmann | Exercise M | 335 | $0 |
| Apr 21, 2026 | Elisabeth A Hellmann | Other F | 121 | $21.6K |
| Apr 21, 2026 | Elisabeth A Hellmann | Exercise M | 335 | $0 |
About MASI insider trading
This page tracks insider transactions for MASIMO CORP (MASI) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.