Masimo
MASI
MASI
355 hedge funds and large institutions have $8.29B invested in Masimo in 2025 Q3 according to their latest regulatory filings, with 46 funds opening new positions, 117 increasing their positions, 121 reducing their positions, and 64 closing their positions.
New
Increased
Maintained
Reduced
Closed
more funds holding in top 10
Funds holding in top 10: →
less call options, than puts
Call options by funds: $ | Put options by funds: $
less repeat investments, than reductions
Existing positions increased: | Existing positions reduced:
less ownership
Funds ownership: →
6% less funds holding
Funds holding: 376 → 355 (-21)
14% less capital invested
Capital invested by funds: $9.67B → $8.29B (-$1.39B)
28% less first-time investments, than exits
New positions opened: 46 | Existing positions closed: 64
Holders
355
Holding in Top 10
4
Calls
$5.51M
Puts
$5.53M
Top Buyers
| 1 | +$82.8M | |
| 2 | +$46.3M | |
| 3 | +$41.3M | |
| 4 |
Alyeska Investment Group
Chicago,
Illinois
|
+$37.3M |
| 5 |
Westfield Capital Management
Boston,
Massachusetts
|
+$36M |
Top Sellers
| 1 | -$209M | |
| 2 | -$120M | |
| 3 | -$82.2M | |
| 4 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$56.5M |
| 5 |
Dimensional Fund Advisors
Austin,
Texas
|
-$39.9M |
