Masimo Corp
MASIDelisted Jun 10, 2026- Industry
- Electromedical & Electrotherapeutic Apparatus
- SEC CIK
- 0000937556
Masimo Corp was delisted on Jun 10, 2026; its insiders filed their last Form 4 on Jun 12, 2026; 453 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
- Market cap
- –
- Not available
- Insider buys
- 0
- Open market, last 90 days
- Insider sells
- 0
- Open market, last 90 days
- 13F holders
- 453
- 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
Financials
See financial statementsFrom SEC filings, in USD.
- Revenue, FY2025
- $1.53B
- −27.1% year over year
- Net income, FY2025
- -$151.5M
- No comparable prior period
- Free cash flow, FY2025
- $198.4M
- +12.5% year over year
- Revenue, Q1 FY2026
- $403.6M
- +8.5% year over year
Revenue flow, FY2025
Green is profit; orange is costs, expenses and taxes. Percentages are shares of revenue.
Net loss for FY2025: $151.5M (9.9% of revenue).
Short interest
See short dataFrom FINRA, settlement date May 29, 2026.
- Short interest
- 3.50M
- Shares sold short
- Change
- −228.5K
- −6.1% vs. previous
- Days to cover
- 3.65
- At average daily volume
Superinvestors holding MASI, Q1 2026
Go to the superinvestors tab1 superinvestor reports holding Masimo Corp on Form 13F. Percentages are the stock's share of each portfolio.
Latest insider trades
See all insider tradesOpen-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
See all 453 holdersThe 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 |
Holders of 5% or more of MASI
See all 3 holders and filingsHolders whose latest Schedule 13D or 13G filing reports 5% or more of Masimo Corp.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 7.90%4.23M shares | – | Feb 7, 20251 filing | Feb 7, 2025 | SEC |
| Kiani Joe E | 13G/A | 6.50%3.66M shares | −3.80 ppfrom 10.30% | Feb 12, 20219 filings | May 14, 2026 | SEC |
| Barclays PLC | 13G | 5.54%2.89M shares | New | May 14, 20261 filing | May 14, 2026 | SEC |
Politician trades
All politician trades in MASI2 members of Congress reported 6 trades in Masimo Corp since 2020. Newest filings:
| Filed | Politician | Type | Amount |
|---|---|---|---|
| Oct 16, 2025 |  Kevin Hern House · OK | Sell | $15K-$50K |
| Jan 13, 2023 | Kevin Hern House · OK | Sell | $50K-$100K |
| Nov 10, 2022 |  Tommy Tuberville Senate · AL | Sell (full) | $1K-$15K |
| Apr 8, 2022 | Tommy Tuberville Senate · AL | Buy | $1K-$15K |
| Jul 14, 2021 | Kevin Hern House · OK | Buy | $100K-$250K |
House · OK · Oct 16, 2025
Sell$15K-$50K
House · OK · Jan 13, 2023
Sell$50K-$100K
Senate · AL · Nov 10, 2022
Sell (full)$1K-$15K
Senate · AL · Apr 8, 2022
Buy$1K-$15K
House · OK · Jul 14, 2021
Buy$100K-$250K