MASI Stock Ownership Activity

MASIMO CORP 13F holders

1 value investing guru has made changes to the MASIMO CORP (MASI) position according to the gurus' latest SEC quarterly report(s). MASI has been completely sold out by 1 guru(s)

Which gurus or hedge funds are buying MASI now?

According to the latest SEC filing(s) MASIMO CORP (MASI) has not been purchased by any super investor.

To see more about who is investing in MASIMO CORP (MASI), please go to the MASI ownership page.

2026 Q1 (1 result)
Ole Andreas Halvorsen
-100.00%
-514,340
-0.19%
0.00%
Reported price*: $130.06
2025 Q4 (2 results)
Ole Andreas Halvorsen
-52.08%
-559,093
-0.19%
0.00%
Henry Ellenbogen
-100.00%
-620,619
-0.87%
0.00%
AVG reported price*: $138.80
2025 Q3 (2 results)
Ole Andreas Halvorsen
+39.87%
+306,007
+0.12%
0.41%
Henry Ellenbogen
-46.68%
-543,279
-0.59%
0.00%
AVG reported price*: $147.55
2025 Q2 (2 results)
Ole Andreas Halvorsen
buy
+767,426
+0.37%
0.37%
Henry Ellenbogen
+3.40%
+38,279
+0.05%
1.48%
AVG reported price*: $168.22
2025 Q1 (1 result)
Henry Ellenbogen
buy
+1,125,619
+1.68%
1.68%
Reported price*: $166.60
2023 Q3 (1 result)
Terry Smith
-100.00%
-730,377
-0.55%
0.00%
Reported price*: $164.55
2023 Q2 (1 result)
Terry Smith
-4.44%
-33,942
-0.02%
0.00%
Reported price*: $164.55
2022 Q4 (1 result)
Terry Smith
-0.11%
-842
-0.00%
0.52%
Reported price*: $147.95
2022 Q3 (1 result)
Terry Smith
+1.17%
+8,848
+0.01%
0.51%
Reported price*: $141.16
2022 Q2 (1 result)
Terry Smith
-0.63%
-4,783
-0.00%
0.44%
Reported price*: $130.67
2022 Q1 (1 result)
Terry Smith
+74.59%
+325,159
+0.16%
0.38%
Reported price*: $145.54
2021 Q4 (1 result)
Terry Smith
+0.21%
+927
+0.00%
0.31%
Reported price*: $292.78
2021 Q3 (1 result)
Terry Smith
+0.36%
+1,572
+0.00%
0.33%
Reported price*: $270.71
2021 Q2 (1 result)
Terry Smith
+0.55%
+2,375
+0.00%
0.29%
Reported price*: $242.45
2021 Q1 (1 result)
Terry Smith
+0.42%
+1,809
+0.00%
0.31%
Reported price*: $229.66
2020 Q4 (2 results)
Terry Smith
+0.08%
+357
+0.00%
0.38%
David M. Polen
-100.00%
-18,414
-0.01%
0.00%
AVG reported price*: $268.38
2020 Q3 (1 result)
David M. Polen
+17.36%
+2,724
+0.00%
0.00%
Reported price*: $236.07
2020 Q2 (2 results)
David M. Polen
+48.95%
+5,156
+0.00%
0.01%
Terry Smith
-9.87%
-46,956
-0.05%
0.43%
AVG reported price*: $227.98
2020 Q1 (2 results)
David M. Polen
+37.83%
+2,891
+0.00%
0.01%
Terry Smith
-17.24%
-99,110
-0.10%
0.47%
AVG reported price*: $177.13
2019 Q4 (1 result)
David M. Polen
+15.66%
+1,035
+0.00%
0.00%
Reported price*: $158.05
2019 Q3 (1 result)
David M. Polen
+1.57%
+102
+0.00%
0.00%
Reported price*: $148.76
2019 Q2 (2 results)
Terry Smith
+17.18%
+84,300
+0.07%
0.45%
David M. Polen
+7.11%
+432
+0.00%
0.00%
AVG reported price*: $148.80
2019 Q1 (2 results)
David M. Polen
+6.13%
+351
+0.00%
0.00%
Terry Smith
+2.36%
+11,291
+0.01%
0.39%
AVG reported price*: $138.29
2018 Q4 (2 results)
Terry Smith
buy
+479,372
+0.33%
0.33%
David M. Polen
+47.73%
+1,849
+0.00%
0.00%
AVG reported price*: $107.33
2018 Q3 (1 result)
David M. Polen
+9.07%
+322
+0.00%
0.00%
Reported price*: $124.42
2018 Q2 (1 result)
David M. Polen
+12.12%
+384
+0.00%
0.00%
Reported price*: $97.69
2018 Q1 (1 result)
David M. Polen
buy
+3,168
+0.00%
0.00%
Reported price*: $88.07
2016 Q2 (1 result)
Eric H. Schoenstein
-100.00%
-10,260
-0.01%
0.00%
Reported price*: $41.81
2016 Q1 (1 result)
Eric H. Schoenstein
buy
+10,260
+0.01%
0.00%
Reported price*: $41.81
2014 Q1 (1 result)
Brian Bares
-100.00%
-2,153,144
-5.05%
0.00%
Reported price*: $29.23
2013 Q4 (1 result)
Brian Bares
-9.93%
-237,262
-0.61%
0.00%
Reported price*: $29.23
2013 Q3 (1 result)
Brian Bares
-21.30%
-647,065
-1.65%
6.09%
Reported price*: $26.64
2013 Q2 (1 result)
Brian Bares
buy
+3,037,471
+6.48%
6.48%
Reported price*: $21.20
42 of 42

Shares, change to shares, sold shares - split-adjusted.

Reported price - this doesn't represent the actual buy or sell price.
It is the split-adjusted price of the security as of the last day of the reported period.

Value or Price - If the security is completely sold out, we show the reported value (or price) prior to the actual period.