Sei Investments CO Masimo Corp Transaction History

Sei Investments CO

  • $89.6 Billion
  • Q3 2025

A detailed history of Sei Investments CO transactions in Masimo Corp stock. As of the latest transaction made, Sei Investments CO holds 21,655 shares of MASI stock, worth $3.27 Million. This represents 0.0% of its overall portfolio holdings.

Number of Shares
21,655
Previous 30,506 29.01%
Holding current value
$3.27 Million
Previous $5.13 Million 37.73%
% of portfolio
0.0%
Previous 0.01%

Shares

36 transactions
Quarter Operation Price Per share shares change shares Held SEC Form
Q3 2025

Nov 13, 2025
SELL
$136.77 - $171.34 $1.21 Million - $1.52 Million
-8,851 Reduced 29.01%
21,655 $3.2 Million
Q2 2025

Aug 14, 2025
SELL
$144.4 - $171.97 $2.72 Million - $3.24 Million
-18,859 Reduced 38.2%
30,506 $5.13 Million
Q1 2025

May 14, 2025
BUY
$163.55 - $190.63 $3.04 Million - $3.55 Million
18,610 Added 60.51%
49,365 $8.22 Million
Q1 2025

May 13, 2025
BUY
$163.55 - $190.63 $679,386 - $791,877
4,154 Added 15.62%
30,755 $5.12 Million
Q4 2024

Feb 11, 2025
SELL
$132.43 - $177.7 $196,128 - $263,173
-1,481 Reduced 5.27%
26,601 $4.4 Million
Q3 2024

Nov 12, 2024
BUY
$104.79 - $133.77 $470,297 - $600,359
4,488 Added 19.02%
28,082 $3.74 Million
Q2 2024

Aug 13, 2024
SELL
$115.24 - $144.91 $8.3 Million - $10.4 Million
-72,048 Reduced 75.33%
23,594 $2.97 Million
Q1 2024

May 07, 2024
SELL
$109.17 - $146.85 $9.28 Million - $12.5 Million
-84,986 Reduced 47.05%
95,642 $14 Million
Q4 2023

Feb 14, 2024
SELL
$76.73 - $120.62 $254,129 - $399,493
-3,312 Reduced 1.8%
180,628 $21.2 Million
Q3 2023

Nov 14, 2023
BUY
$84.17 - $161.17 $10.7 Million - $20.5 Million
127,249 Added 224.46%
183,940 $16.1 Million
Q2 2023

Aug 11, 2023
BUY
$155.24 - $196.47 $2.28 Million - $2.89 Million
14,686 Added 34.96%
56,691 $9.33 Million
Q1 2023

May 12, 2023
BUY
$146.03 - $184.54 $2.55 Million - $3.22 Million
17,434 Added 70.95%
42,005 $7.75 Million
Q4 2022

Feb 10, 2023
SELL
$110.88 - $150.36 $3.01 Million - $4.08 Million
-27,128 Reduced 52.47%
24,571 $3.64 Million
Q3 2022

Nov 14, 2022
BUY
$125.58 - $169.38 $658,667 - $888,398
5,245 Added 11.29%
51,699 $7.3 Million
Q2 2022

Aug 15, 2022
BUY
$112.97 - $151.71 $827,166 - $1.11 Million
7,322 Added 18.71%
46,454 $6.1 Million
Q1 2022

May 13, 2022
SELL
$135.71 - $284.87 $459,649 - $964,854
-3,387 Reduced 7.97%
39,132 $5.66 Million
Q4 2021

Feb 14, 2022
BUY
$266.41 - $303.29 $915,651 - $1.04 Million
3,437 Added 8.79%
42,519 $12.4 Million
Q3 2021

Nov 12, 2021
SELL
$249.0 - $285.24 $606,066 - $694,274
-2,434 Reduced 5.86%
39,082 $10.6 Million
Q2 2021

Aug 06, 2021
SELL
$208.49 - $248.2 $786,632 - $936,458
-3,773 Reduced 8.33%
41,516 $10.1 Million
Q1 2021

May 12, 2021
BUY
$220.31 - $283.75 $1.1 Million - $1.42 Million
5,007 Added 12.43%
45,289 $10.7 Million
Q4 2020

Feb 08, 2021
SELL
$223.82 - $271.35 $626,696 - $759,780
-2,800 Reduced 6.5%
40,282 $10.9 Million
Q3 2020

Dec 04, 2020
SELL
$209.49 - $246.81 $100,974 - $118,962
-482 Reduced 1.11%
43,082 $10.1 Million
Q3 2020

Nov 06, 2020
BUY
$209.49 - $246.81 $2.22 Million - $2.62 Million
10,609 Added 32.19%
43,564 $10.3 Million
Q2 2020

Aug 17, 2020
SELL
$178.49 - $250.39 $1.21 Million - $1.7 Million
-6,805 Reduced 17.12%
32,955 $7.54 Million
Q2 2020

Aug 11, 2020
BUY
$178.49 - $250.39 $1.98 Million - $2.78 Million
11,116 Added 38.81%
39,760 $7.15 Million
Q1 2020

May 14, 2020
SELL
$148.38 - $186.78 $1.03 Million - $1.3 Million
-6,954 Reduced 19.53%
28,644 $5.08 Million
Q4 2019

Feb 06, 2020
SELL
$140.81 - $159.49 $2.61 Million - $2.96 Million
-18,555 Reduced 34.26%
35,598 $5.63 Million
Q3 2019

Nov 12, 2019
SELL
$145.61 - $159.87 $1.62 Million - $1.78 Million
-11,119 Reduced 17.03%
54,153 $8.02 Million
Q2 2019

Aug 14, 2019
SELL
$122.29 - $148.82 $164,602 - $200,311
-1,346 Reduced 2.02%
65,272 $9.7 Million
Q1 2019

May 15, 2019
BUY
$102.78 - $138.28 $1.46 Million - $1.97 Million
14,236 Added 27.18%
66,618 $9.22 Million
Q4 2018

Feb 13, 2019
BUY
$98.38 - $125.32 $1.86 Million - $2.36 Million
18,858 Added 56.25%
52,382 $6.17 Million
Q3 2018

Nov 08, 2018
SELL
$97.19 - $124.54 $1.42 Million - $1.82 Million
-14,608 Reduced 30.35%
33,524 $4.17 Million
Q2 2018

Aug 03, 2018
BUY
$83.88 - $102.21 $370,581 - $451,563
4,418 Added 10.11%
48,132 $4.7 Million
Q1 2018

May 11, 2018
BUY
$82.06 - $95.19 $1.3 Million - $1.51 Million
15,898 Added 57.15%
43,714 $3.85 Million
Q4 2017

Feb 08, 2018
SELL
$84.49 - $90.09 $220,096 - $234,684
-2,605 Reduced 8.56%
27,816 $2.36 Million
Q3 2017

Nov 06, 2017
BUY
$81.79 - $96.62 $2.49 Million - $2.94 Million
30,421
30,421 $2.63 Million

Others Institutions Holding MASI

# of Institutions
395
Shares Held
47.1M
Call Options Held
36.2K
Put Options Held
72.4K
View Full List

About MASIMO CORP

MASI Quotes by TradingView
  • Ticker MASI
  • Exchange NASDAQ
  • Sector Healthcare
  • Industry Medical Instruments & Supplies
  • Shares Outstandng 52,530,200
  • Market Cap $7.94B
  • Description
  • Masimo Corporation develops, manufactures, and markets noninvasive monitoring technologies and hospital automation solutions worldwide. The company offers masimo signal extraction technology (SET) pulse oximetry with measure-through motion and low perfusion pulse oximetry monitoring to address the primary limitations of conventional pulse oximet...
More about MASI
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