Institutional Ownership Masimo Corp (MASI)
This table provides information about the institutional ownership of Masimo Corp (MASI). We have compiled data on the 399 institutions that hold shares in the stock, with a total of 47.1 Million shares, which have been reported (via 13F filing form) to have a value of $7.11 Billion.
| Holding | Report Date | shares Held | Holding Value (Reported) | Last Trade | Trade History |
|---|---|---|---|---|---|
|
Black Rock Inc.
New York, NY |
Aug 13, 2024 Q2 2024 |
9,351,239
shares
|
$1.41 Billion
0.03% of portfolio
|
Q2 2024
Added 18.66%
|
|
|
Vanguard Group Inc
Valley Forge, PA |
Nov 07, 2025 Q3 2025 |
4,810,011
shares
|
$727 Million
0.01% of portfolio
|
Q3 2025
Added 3.71%
|
|
|
Politan Capital Management LP
New York, NY |
Nov 14, 2025 Q3 2025 |
4,589,648
shares
|
$694 Million
61.61% of portfolio
|
Q3 2025
Reduced 2.69%
|
|
|
Massachusetts Financial Services CO
Boston, MA |
Oct 29, 2025 Q3 2025 |
2,619,960
shares
|
$396 Million
0.13% of portfolio
|
Q3 2025
Added 6.05%
|
|
|
T. Rowe Price Investment Management, Inc.
Baltimore, MD |
Nov 14, 2025 Q3 2025 |
2,126,763
shares
|
$321 Million
0.19% of portfolio
|
Q3 2025
Reduced 14.93%
|
|
|
Capital Research Global Investors
Los Angeles, CA |
Nov 13, 2025 Q3 2025 |
1,854,128
shares
|
$280 Million
0.05% of portfolio
|
Q3 2025
Reduced 0.08%
|
|
|
State Street Corp
Boston, MA |
Nov 14, 2025 Q3 2025 |
1,484,471
shares
|
$224 Million
0.01% of portfolio
|
Q3 2025
Reduced 0.13%
|
|
|
Westfield Capital Management CO LP
Boston, MA |
Nov 10, 2025 Q3 2025 |
1,419,250
shares
|
$214 Million
0.95% of portfolio
|
Q3 2025
Added 111.36%
|
|
|
Alyeska Investment Group, L.P.
Chicago, IL |
Nov 14, 2025 Q3 2025 |
1,381,085
shares
|
$209 Million
0.68% of portfolio
|
Q3 2025
Added 21.74%
|
|
|
Viking Global Investors LP
|
Nov 14, 2025 Q3 2025 |
1,073,433
shares
|
$162 Million
0.45% of portfolio
|
Q3 2025
Added 39.87%
|
|
|
Geode Capital Management, LLC
Boston, MA |
Nov 12, 2025 Q3 2025 |
942,439
shares
|
$142 Million
0.01% of portfolio
|
Q3 2025
Added 5.13%
|
|
|
Goldman Sachs Group Inc
New York, NY |
Nov 14, 2025 Q3 2025 |
744,402
shares
|
$112 Million
0.01% of portfolio
|
Q3 2025
Added 57.87%
|
|
|
Morgan Stanley
New York, NY |
Nov 14, 2025 Q3 2025 |
690,601
shares
|
$104 Million
0.01% of portfolio
|
Q3 2025
Reduced 10.0%
|
|
|
Rtw Investments, LP
New York, NY |
Nov 14, 2025 Q3 2025 |
683,294
shares
|
$103 Million
1.35% of portfolio
|
Q4 2024
Reduced 53.28%
|
|
|
Squarepoint Ops LLC
New York, NY |
Nov 14, 2025 Q3 2025 |
620,932
shares
|
$93.8 Million
0.1% of portfolio
|
Q3 2025
Added 738.79%
|
|
|
Durable Capital Partners LP
Bethesda, MD |
Nov 14, 2025 Q3 2025 |
620,619
shares
|
$93.8 Million
0.75% of portfolio
|
Q3 2025
Reduced 46.68%
|
|
|
Price T Rowe Associates Inc
Baltimore, MD |
Nov 14, 2025 Q3 2025 |
514,946
shares
|
$77.8 Million
0.01% of portfolio
|
Q3 2025
Added 27.0%
|
|
|
Ameriprise Financial Inc
Minneapolis, MN |
Nov 14, 2025 Q3 2025 |
460,951
shares
|
$69.7 Million
0.02% of portfolio
|
Q3 2025
Added 16.85%
|
|
|
Bank Of America Corp
Charlotte, NC |
Nov 14, 2025 Q3 2025 |
405,061
shares
|
$61.2 Million
0.0% of portfolio
|
Q3 2025
Added 112.99%
|
|
|
Sumitomo Mitsui Trust Holdings, Inc.
|
Oct 27, 2025 Q3 2025 |
397,248
shares
|
$60 Million
0.03% of portfolio
|
Q3 2025
Reduced 15.67%
|
|
|
Northern Trust Corp
Chicago, IL |
Nov 14, 2025 Q3 2025 |
392,142
shares
|
$59.3 Million
0.01% of portfolio
|
Q3 2025
Added 0.93%
|
|
|
Bamco Inc
New York, NY |
Nov 14, 2025 Q3 2025 |
388,747
shares
|
$58.7 Million
0.16% of portfolio
|
Q3 2025
Added 1.08%
|
|
|
Charles Schwab Investment Management Inc
San Francisco, CA |
Nov 10, 2025 Q3 2025 |
364,457
shares
|
$55.1 Million
0.01% of portfolio
|
Q3 2025
Reduced 1.69%
|
|
|
Ensemble Capital
Ensemble Capital Management, LLC | San Francisco, Ca
|
Nov 12, 2024 Q3 2024 |
340,355
shares
|
$51.4 Million
3.85% of portfolio
|
Q3 2024
Reduced 16.4%
|
|
|
Schroder Investment Management Group
London, X0 |
Nov 12, 2025 Q3 2025 |
336,650
shares
|
$50.9 Million
0.04% of portfolio
|
Q3 2025
Reduced 24.94%
|
|