Institutional Ownership Masimo Corp (MASI)
This table provides information about the institutional ownership of Masimo Corp (MASI). We have compiled data on the 419 institutions that hold shares in the stock, with a total of 48.2 Million shares, which have been reported (via 13F filing form) to have a value of $6.64 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
|
$1.29 Billion
0.03% of portfolio
|
Q2 2024
Added 18.66%
|
|
|
Politan Capital Management LP
New York, NY |
Aug 14, 2025 Q2 2025 |
4,716,536
shares
|
$650 Million
57.03% of portfolio
|
Q2 2025
Added 0.04%
|
|
|
Vanguard Group Inc
Valley Forge, PA |
Aug 11, 2025 Q2 2025 |
4,638,135
shares
|
$639 Million
0.01% of portfolio
|
Q2 2025
Added 1.2%
|
|
|
T. Rowe Price Investment Management, Inc.
Baltimore, MD |
Aug 14, 2025 Q2 2025 |
2,500,144
shares
|
$344 Million
0.27% of portfolio
|
Q2 2025
Added 49.42%
|
|
|
Massachusetts Financial Services CO
Boston, MA |
Aug 08, 2025 Q2 2025 |
2,470,393
shares
|
$340 Million
0.14% of portfolio
|
Q2 2025
Added 25.54%
|
|
|
Capital Research Global Investors
Los Angeles, CA |
Aug 13, 2025 Q2 2025 |
1,855,670
shares
|
$256 Million
0.07% of portfolio
|
Q2 2025
Reduced 9.75%
|
|
|
State Street Corp
Boston, MA |
Aug 14, 2025 Q2 2025 |
1,486,394
shares
|
$205 Million
0.01% of portfolio
|
Q2 2025
Added 0.7%
|
|
|
Holocene Advisors, LP
New York, NY |
Aug 14, 2025 Q2 2025 |
1,243,607
shares
|
$171 Million
0.55% of portfolio
|
Q2 2025
Reduced 6.73%
|
|
|
Durable Capital Partners LP
Bethesda, MD |
Aug 14, 2025 Q2 2025 |
1,163,898
shares
|
$160 Million
1.54% of portfolio
|
Q2 2025
Added 3.4%
|
|
|
Alyeska Investment Group, L.P.
Chicago, IL |
Aug 14, 2025 Q2 2025 |
1,134,490
shares
|
$156 Million
0.75% of portfolio
|
Q2 2025
Added 57.02%
|
|
|
Geode Capital Management, LLC
Boston, MA |
Aug 08, 2025 Q2 2025 |
896,418
shares
|
$123 Million
0.01% of portfolio
|
Q2 2025
Added 6.17%
|
|
|
Alliancebernstein L.P.
New York, NY |
Aug 14, 2025 Q2 2025 |
844,067
shares
|
$116 Million
0.05% of portfolio
|
Q2 2025
Reduced 2.52%
|
|
|
Viking Global Investors LP
|
Aug 14, 2025 Q2 2025 |
767,426
shares
|
$106 Million
0.41% of portfolio
|
Q2 2025
New holding
|
|
|
Morgan Stanley
New York, NY |
Aug 15, 2025 Q2 2025 |
767,375
shares
|
$106 Million
0.01% of portfolio
|
Q2 2025
Added 4.29%
|
|
|
Rtw Investments, LP
New York, NY |
Aug 14, 2025 Q2 2025 |
683,294
shares
|
$94.1 Million
1.77% of portfolio
|
Q4 2024
Reduced 53.28%
|
|
|
Westfield Capital Management CO LP
Boston, MA |
May 09, 2025 Q1 2025 |
671,479
shares
|
$92.5 Million
0.58% of portfolio
|
Q1 2025
Reduced 12.67%
|
|
|
Dimensional Fund Advisors LP
Austin, TX |
Aug 12, 2025 Q2 2025 |
523,226
shares
|
$72.1 Million
0.02% of portfolio
|
Q2 2025
Reduced 25.61%
|
|
|
Goldman Sachs Group Inc
New York, NY |
Aug 14, 2025 Q2 2025 |
471,525
shares
|
$64.9 Million
0.01% of portfolio
|
Q2 2025
Added 68.25%
|
|
|
Sumitomo Mitsui Trust Holdings, Inc.
|
Jul 31, 2025 Q2 2025 |
471,041
shares
|
$64.9 Million
0.05% of portfolio
|
Q2 2025
Added 26.29%
|
|
|
Schroder Investment Management Group
London, X0 |
Aug 13, 2025 Q2 2025 |
448,501
shares
|
$61.8 Million
0.07% of portfolio
|
Q2 2025
Added 2.97%
|
|
|
Price T Rowe Associates Inc
Baltimore, MD |
Aug 14, 2025 Q2 2025 |
405,460
shares
|
$55.8 Million
0.01% of portfolio
|
Q2 2025
Added 43.46%
|
|
|
Ameriprise Financial Inc
Minneapolis, MN |
Aug 14, 2025 Q2 2025 |
394,487
shares
|
$54.3 Million
0.02% of portfolio
|
Q2 2025
Added 86.27%
|
|
|
Northern Trust Corp
Chicago, IL |
Aug 13, 2025 Q2 2025 |
388,542
shares
|
$53.5 Million
0.01% of portfolio
|
Q2 2025
Added 1.35%
|
|
|
Bamco Inc
New York, NY |
Aug 14, 2025 Q2 2025 |
384,589
shares
|
$53 Million
0.18% of portfolio
|
Q2 2025
Added 21.21%
|
|
|
Charles Schwab Investment Management Inc
San Francisco, CA |
Aug 12, 2025 Q2 2025 |
370,734
shares
|
$51.1 Million
0.01% of portfolio
|
Q2 2025
Reduced 1.68%
|