Masimo Corp
MASIDelisted- Industry
- Electromedical & Electrotherapeutic Apparatus
- SEC CIK
- 0000937556
Masimo Corp was delisted in 2026; its insiders filed their last Form 4 on Jun 12, 2026; 451 institutions reported holding it in 13F filings for Q1 2026, worth $9.69B in total; Soros Fund Management was the only superinvestor holding it.
Key figures
- Insider buys
- 0
- Open market, last 90 days
- Insider sells
- 0
- Open market, last 90 days
- 13F holders
- 451
- Q1 2026, +65 vs. previous quarter
- 13F value
- $9.69B
- Reported value at the end of Q1 2026
- Superinvestors holding
- 1
- At the end of Q1 2026
Superinvestors holding MASI, Q1 2026
1 superinvestor reports holding Masimo Corp on Form 13F. Percentages are the stock's share of each portfolio.
Latest insider trades
Open-market purchases and sales by Masimo Corp insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Jan 30, 2026 (view filing) | Jan 28 | 2 days | Sampath AnandEVP, Ops & Clinical Research | SSale | −18.7K | $136.81 | −$2.56M | −31.3%40.9K after | 3 lots |
| Aug 14, 2025 (view filing) | Aug 12-13 | 2 days | Brennan MichelleDirector, Other: Chairman of the Board | PPurchase | +200 | $152.80 | +$30.6K | +2.8%7.32K after | 2 lots |
| Aug 12, 2025 (view filing) | Aug 11 | 1 day | Jellison William RDirector | PPurchase | +3.00K | $145.98 | +$437.9K | +167.6%4.79K after | |
| May 14, 2025 (view filing) | May 12 | 2 days | Muhsin BilalChief Operating Officer | SSale | −10.0K | $163.28 | −$1.63M | −29.3%24.2K after | 3 lots |
| Mar 14, 2025 (view filing) | Mar 14 | Same day | Reynolds Craig BDirector | SSale | −2.05K | $166.13 | −$341.1K | −11.0%16.6K after | 10b5-1 |
| Mar 12, 2025 (view filing) | Mar 10 | 2 days | Muhsin BilalChief Operating Officer | SSale | −30.0K | $167.49 | −$5.02M | −55.4%24.2K after | 8 lots10b5-1 |
| Apr 30, 2024 (view filing) | Apr 26 | 4 days | Reynolds Craig BDirector | SSale | −40.0K | $136.17 | −$5.45M | −84.4%7.41K after | 10b5-1 |
| May 30, 2023 (view filing) | May 25 | 5 days | Kiani Joe ECEO and Chairman of the Board | PPurchase | +6.37K | $157.16 | +$1.00M | +1.8%366.1K after | 3 lots |
| Dec 19, 2022 (view filing) | Dec 15 | 4 days | Kiani Joe ECEO and Chairman of the Board | PPurchase | +7.04K | $144.80 | +$1.02M | +17.7%46.8K after | 4 lots |
| Nov 15, 2022 (view filing) | Nov 14 | 1 day | Kiani Joe ECEO and Chairman of the Board | PPurchase | +32.0K | $124.00 | +$3.97M | +411.0%39.8K after | 3 lots |
Top 10 13F holders, Q1 2026
The largest institutional positions in Masimo Corp at the end of Q1 2026; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 4,644,578 | $826.1M | 0.01% | −4,211,041−47.6% | Reduced |
| Politan Capital Management LP | 4,589,648 | $816.4M | 82.89% | 00.0% | Unchanged |
| Pentwater Capital Management LP | 3,176,000 | $564.9M | 4.01% | +3,176,000 | New |
| Barclays PLC | 2,743,985 | $488.1M | 0.17% | +2,685,627+4,602.0% | Added |
| HBK Investments L P | 2,576,109 | $458.2M | 5.77% | +2,576,109 | New |
| Massachusetts Financial Services Co | 2,342,790 | $416.7M | 0.14% | −321,085−12.1% | Reduced |
| Vanguard Capital Management LLC | 2,050,045 | $364.6M | 0.01% | +2,050,045 | New |
| Vanguard Portfolio Management LLC | 2,006,861 | $357.0M | 0.02% | +2,006,861 | New |
| FMR LLC | 1,450,823 | $258.1M | 0.01% | −6,413,341−81.6% | Reduced |
| State Street Corp | 1,437,724 | $255.7M | 0.01% | +22,528+1.6% | Added |