Companies / Masimo Corporation / Activity
Activity — Masimo Corporation
40 moves.
Top impactInsider · CEO movesInsider · biggest buysInsider · biggest sellsInstitution · biggest movesInstitution · new positions
| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q1 2026 as of | Hbk Investments L P 13F manager | New | Common stock | $458.21M | +2.6M | 2,576,109 4.92% of shares | high |
| Q1 2026 as of | Balyasny Asset Management L.P. 13F manager | New | Common stock | $137.14M | +771K | 770,986 1.47% of shares | high |
| Q1 2026 as of | AQR Arbitrage LLC 13F manager | New | Common stock | $73.87M | +417K | 416,956 0.80% of shares | high |
| Q1 2026 as of | Hudson Bay Capital Management LP 13F manager | New | Common stock | $58.82M | +331K | 330,679 0.63% of shares | high |
| Q1 2026 as of | Whitebox Advisors LLC 13F manager | New | Common stock | $48.03M | +270K | 270,001 0.52% of shares | medium |
| Q1 2026 as of | Polar Asset Management Partners Inc. 13F manager | New | Common stock | $41.27M | +232K | 232,026 0.44% of shares | medium |
| Q1 2026 as of | Water Island Capital LLC 13F manager | New | Common stock | $34.54M | +194K | 194,197 0.37% of shares | medium |
| Q1 2026 as of | Alpine Associates Management Inc. 13F manager | New | Common stock | $33.62M | +189K | 189,000 0.36% of shares | medium |
| Q1 2026 as of | Arrowstreet Capital, Limited Partnership 13F manager | New | Common stock | $30.70M | +173K | 172,588 0.33% of shares | medium |
| Q1 2026 as of | Champlain Investment Partners, LLC 13F manager | New | Common stock | $25.13M | +141K | 141,284 0.27% of shares | medium |
| Q1 2026 as of | TIG Advisors, LLC 13F manager | New | Common stock | $24.05M | +135K | 135,197 0.26% of shares | medium |
| Q1 2026 as of | Weiss Asset Management LP 13F manager | New | Common stock | $20.03M | +113K | 112,600 0.22% of shares | medium |
| Q1 2026 as of | Nomura Holdings Inc 13F manager | New | Common stock | $19.46M | +109K | 109,390 0.21% of shares | medium |
| Q1 2026 as of | Soros Fund Management LLC 13F manager | New | Common stock | $17.94M | +101K | 100,838 0.19% of shares | medium |
| Q1 2026 as of | Fortress Investment Group LLC 13F manager | New | Common stock | $6.39M | +36K | 35,900 0.07% of shares | medium |
| Q1 2026 as of | Credit Industriel Et Commercial 13F manager | New | Common stock | $4.10M | +23K | 23,050 0.04% of shares | low |
| Q1 2026 as of | New York Life Investment Management LLC 13F manager | New | Common stock | $3.95M | +22K | 22,191 0.04% of shares | low |
| Q1 2026 as of | ING Groep NV 13F manager | New | Common stock | $3.86M | +22K | 21,700 0.04% of shares | low |
| Q1 2026 as of | P Schoenfeld Asset Management LP 13F manager | New | Common stock | $2.67M | +15K | 15,000 0.03% of shares | low |
| Q1 2026 as of | Harvest Management LLC 13F manager | New | Common stock | $1.96M | +11K | 11,000 0.02% of shares | low |
| Q1 2026 as of | Blackstone Inc 13F manager | New | Common stock | $1.67M | +9K | 9,383 0.02% of shares | low |
| Q1 2026 as of | Brighton Jones LLC 13F manager | New | Common stock | $939.3K | +5K | 5,281 0.01% of shares | low |
| Q1 2026 as of | Prelude Capital Management, LLC 13F manager | New | Common stock | $841.7K | +5K | 4,732 <0.01% of shares | low |
| Q1 2026 as of | Wolverine Asset Management, LLC 13F manager | New | Common stock | $809.1K | +5K | 4,549 <0.01% of shares | low |
| Q1 2026 as of | Evergreen Capital Management LLC 13F manager | New | Common stock | $738.0K | +4K | 4,149 <0.01% of shares | low |
| Q1 2026 as of | Calamos Advisors LLC 13F manager | New | Common stock | $268.8K | +2K | 1,511 <0.01% of shares | low |
| Q1 2026 as of | Guggenheim Capital LLC 13F manager | New | Common stock | $250.3K | +1K | 1,407 <0.01% of shares | low |
| Q1 2026 as of | Keel Point, LLC 13F manager | New | Common stock | $218.4K | +1K | 1,228 <0.01% of shares | low |
| Q4 2025 as of | Sanctuary Advisors, LLC 13F manager | New | Common stock | $217.4K | +2K | 1,672 <0.01% of shares | low |
| Q1 2026 as of | Ballentine Partners, LLC 13F manager | New | Common stock | $209.4K | +1K | 1,177 <0.01% of shares | low |
| Q1 2026 as of | Walleye Trading LLC 13F manager | New | Common stock | $195.7K | +1K | 1,100 <0.01% of shares | low |
| Q1 2021 as of | Leonteq Securities AG 13F manager | New | Common stock | $91.9K | +400 | 400 <0.01% of shares | low |
| Q1 2026 as of | Longfellow Investment Management Co LLC 13F manager | New | Common stock | $76.3K | +429 | 429 <0.01% of shares | low |
| Q3 2024 as of | Danske Bank A/S 13F manager | New | Common stock | $66.7K | +500 | 500 <0.01% of shares | low |
| Q4 2025 as of | Danske Bank A/S 13F manager | New | Common stock | $52.0K | +400 | 400 <0.01% of shares | low |
| Q1 2026 as of | Glazer Capital, LLC 13F manager | New | Common stock | $28.1K | +158K | 157,858 0.30% of shares | low |
| Q1 2026 as of | Zions Bancorporation, National Association /Ut 13F manager | New | Common stock | $2.0K | +11 | 11 <0.01% of shares | low |
| Q1 2026 as of | Marquette Asset Management, LLC 13F manager | New | Common stock | $1.4K | +8 | 8 <0.01% of shares | low |
| Q3 2024 as of | Prestige Wealth Management Group LLC 13F manager | New | Common stock | $534 | +4 | 4 <0.01% of shares | low |
| Q1 2026 as of | Praxis Investment Management Inc 13F manager | New | Common stock | $315 | +2K | 1,773 <0.01% of shares | low |