MASIMO CORP
Total Trades
16
Buys
4
Sells
8
Largest Trade
$1M+
Insiders
5
Institutional Funds
317
Inst. Value
$1M+
Activist Filings
38
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Sampath Anand | EVP | EXERCISE | $1M+ | 30K | $37.84 | Jan 31, 2026 |
| Sampath Anand | EVP | SELL | $1M+ | 19K | $136.81 | Jan 31, 2026 |
| Muhsin Bilal | COO | SELL | $1M+ | 10K | $163.28 | May 14, 2025 |
| Muhsin Bilal | COO | EXERCISE | $100K–$500K | 10K | $34.51 | May 14, 2025 |
| REYNOLDS CRAIG B | Director | SELL | $100K–$500K | 2K | $166.13 | Mar 14, 2025 |
| Muhsin Bilal | COO | EXERCISE | $1M+ | 30K | $37.84 | Mar 13, 2025 |
| Muhsin Bilal | COO | SELL | $1M+ | 30K | $167.49 | Mar 13, 2025 |
| REYNOLDS CRAIG B | Director | SELL | $1M+ | 40K | $136.17 | May 1, 2024 |
| REYNOLDS CRAIG B | Director | EXERCISE | $500K+ | 40K | $23.04 | May 1, 2024 |
| KIANI JOE E | CEO and Chairman o… | BUY | $1M+ | 6K | $157.16 | May 31, 2023 |
| KIANI JOE E | CEO and Chairman o… | BUY | $1M+ | 7K | $144.79 | Dec 19, 2022 |
| KIANI JOE E | CEO and Chairman o… | BUY | $1M+ | 32K | $123.99 | Nov 16, 2022 |
| KIANI JOE E | CEO and Chairman o… | BUY | $1M+ | 8K | $129.27 | Nov 16, 2022 |
| Mikkelson Adam | Director | SELL | $100K–$500K | 600 | $214.80 | Jan 26, 2022 |
| Mikkelson Adam | Director | SELL | $100K–$500K | 600 | $228.70 | Jan 20, 2022 |
| Mikkelson Adam | Director | SELL | $100K–$500K | 600 | $250.01 | Jan 12, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 317 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| Politan Capital Management LP | 4.6M | $1M+ | SH |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 2.1M | $1M+ | SH |
| NAYA CAPITAL MANAGEMENT UK LTD | 1.6M | $1M+ | SH |
| WESTFIELD CAPITAL MANAGEMENT CO LP | 1.5M | $1M+ | SH |
| STATE STREET CORP | 1.4M | $1M+ | SH |
| Alyeska Investment Group, L.P. | 1.3M | $1M+ | SH |
| AQR CAPITAL MANAGEMENT LLC | 1.1M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 802K | $1M+ | SH |
| Capital Research Global Investors | 638K | $1M+ | SH |
| Squarepoint Ops LLC | 584K | $1M+ | SH |
| VIKING GLOBAL INVESTORS LP | 514K | $1M+ | SH |
| SCHRODER INVESTMENT MANAGEMENT GROUP | 476K | $1M+ | SH |
| NORGES BANK | 377K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 362K | $1M+ | SH |
| Schonfeld Strategic Advisors LLC | 265K | $1M+ | SH |
| Erste Asset Management GmbH | 200K | $1M+ | SH |
| AMERICAN CENTURY COMPANIES INC | 179K | $1M+ | SH |
| RAYMOND JAMES FINANCIAL INC | 171K | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 158K | $1M+ | SH |
| DF DENT & CO INC | 143K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Mar 6, 2026
4.5%
2.3M shares
SC 13D/A · Feb 18, 2026
6.2%
4.6M shares
SC 13G/A · Feb 14, 2026
10.3%
5.9M shares
BlackRock Portfolio Management LLC
SC 13G/A · Jan 21, 2026
8.2%
4.4M shares
SC 13G/A · Nov 13, 2025
11.1%
6.4M shares
SC 13G/A · Aug 12, 2025
11.4%
6.6M shares
SC 13G/A · Apr 23, 2025
13.2%
7.6M shares
BlackRock Portfolio Management LLC
SC 13G · Mar 4, 2025
10.3%
5.5M shares
SC 13G/A · Feb 12, 2025
15.0%
8.0M shares
SC 13G/A · Feb 7, 2025
7.9%
4.2M shares
SC 13D/A · Sep 25, 2024
8.8%
4.7M shares
SC 13D/A · Aug 30, 2024
8.8%
4.7M shares
SC 13D/A · Jul 17, 2024
8.9%
4.7M shares
SC 13D/A · Jul 15, 2024
8.9%
4.7M shares
SC 13D/A · Jul 12, 2024
8.9%
4.7M shares
SC 13D/A · Jul 8, 2024
8.9%
4.7M shares
SC 13G/A · Jun 7, 2024
16.0%
8.5M shares
SC 13D/A · May 9, 2024
8.9%
4.7M shares
SC 13D/A · May 8, 2024
8.9%
4.7M shares
SC 13D/A · Mar 27, 2024
8.9%
4.7M shares
SC 13G/A · Feb 14, 2024
9.2%
5.0M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
9.1%
4.8M shares
SC 13G/A · Jan 24, 2024
10.7%
5.7M shares
SC 13D/A · Jun 30, 2023
8.9%
4.7M shares
SC 13D/A · May 1, 2023
9.0%
4.7M shares
SC 13D/A · Mar 13, 2023
9.0%
4.7M shares
SC 13D/A · Mar 6, 2023
9.0%
4.7M shares
SC 13G/A · Feb 14, 2023
9.3%
5.0M shares
SC 13G/A · Jan 26, 2023
11.3%
6.0M shares
SC 13G/A · Jan 20, 2023
11.3%
6.0M shares
SC 13G · Jan 10, 2023
10.4%
5.5M shares
SC 13D/A · Oct 21, 2022
8.8%
4.6M shares
SC 13D/A · Sep 27, 2022
8.8%
4.6M shares
SC 13D · Aug 16, 2022
8.4%
4.4M shares
SC 13G · Jun 9, 2022
10.9%
6.1M shares
SC 13G/A · Feb 14, 2022
8.5%
4.8M shares
SC 13G/A · Jan 27, 2022
16.3%
9.0M shares
SC 13G · Jan 25, 2022
16.3%
9.0M shares