Masimo
MASI · NASDAQ
Price unavailable right now.
No price history for this range.
Who owns MASI
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 7.3% of MASI’s shares.
- Kiani (Joe E)5.8%
- Columbia Wanger Asset Management, LLC0.6%
- Ossiam0.3%
- Cibra Capital Ltd0.2%
- Next 6 largest institutions0.4%
- All other shareholders92.7%
| Holder | Shares | % of shares |
|---|---|---|
| Kiani (Joe E) | 3.05M | 5.81% |
| Columbia Wanger Asset Management, LLC | 298.57K | 0.57% |
| Ossiam | 182.49K | 0.35% |
| Cibra Capital Ltd | 90.38K | 0.17% |
| Vest Financial, LLC | 65.42K | 0.12% |
| UBS Fund Management (Switzerland) AG | 34.74K | 0.07% |
| Carson Wealth Management Group | 34.69K | 0.07% |
| Baird Investment Management | 25.10K | 0.05% |
| Muhsin (Bilal) | 24.17K | 0.05% |
| Keyridge Asset Management Limited | 21.17K | 0.04% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Event Driven Equity Fund | 971.82K | 1.86% |
| BlackRock Global Unconstrained Equity Fund (UK) | 410.96K | 0.78% |
| First Trust Merger Arbitrage Fund | 402.12K | 0.77% |
| NexPoint Merger Arbitrage Fund | 297.50K | 0.57% |
| Aon Hewitt Demo Small Cap Value Fund | 258.07K | 0.49% |
Insider trades
Form 4 filings by officers, directors and large holders
Insiders made no open-market buys or sales of MASI in the last 6 months.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Meehan Greg Allen | Other | 5.80K | $1.04M |
| Meehan Greg Allen | Other | 4.31K | $107.09K |
| Meehan Greg Allen | Other | 8.55K | — |
| Meehan Greg Allen | Other | 1.93K | — |
| Hataishi Paul | Other | 3.13K | — |
| Hataishi Paul | Other | 3.38K | — |
| Hataishi Paul | Other | 3.22K | — |
| Hataishi Paul | Other | 910 | — |
| Hataishi Paul | Other | 627 | — |
| Hataishi Paul | Other | 13.32K | $2.40M |
Short interest
Settled May 29, 2026
- Shares short
- 3.50M
- Days to cover
- 3.65
- % of shares outstanding
- 6.69%
- Average daily volume
- 958.55K
- Change since last report
- −6.1%
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