Masimo Corporation

Historical 13F Holders

Symbol
MASI
CUSIP
574795100
All holders as of
Q2 2026
Type
Equity
Class
COM
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 574795100 since 12/18/2024, newest first.

Filer % of Class Filed
Pentwater Capital Management LP 13G/A Amendment 1
0% 8/14/2026
Event 6/30/2026
Politan Capital Management LP 13D/A Amendment 17
0% 6/11/2026
Event 6/10/2026
Pentwater Capital Management LP 13G
6.1% 5/15/2026
Event 3/31/2026
Kiani Joe E 13G/A Amendment 21 6.5% 5/14/2026
Event 3/31/2026
Barclays PLC 13G 5.5% 5/14/2026
Event 3/31/2026
BlackRock Portfolio Management LLC 13G/A Amendment 2 0.2% 4/30/2026
Event 3/31/2026
Vanguard Group Inc 13G/A Amendment 12 0% 3/27/2026
Event 3/13/2026
FMR LLC 13G/A Amendment 3
4.5% 3/6/2026
Event 2/27/2026
Politan Capital Management LP 13D/A Amendment 16
6.2% 2/17/2026
Event 2/16/2026
Kiani Joe E 13G/A Amendment 20 10.3% 2/13/2026
Event 12/31/2025
BlackRock Portfolio Management LLC 13G/A Amendment 1 8.2% 1/21/2026
Event 12/31/2025
Kiani Joe E 13G/A Amendment 19 11.1% 11/12/2025
Event 9/30/2025
Kiani Joe E 13G/A Amendment 18 11.4% 8/12/2025
Event 6/30/2025
Kiani Joe E 13G/A Amendment 17 13.2% 4/22/2025
Event 3/31/2025
BlackRock Portfolio Management LLC 13G 10.3% 3/4/2025
Event 2/28/2025
FMR LLC 13G/A Amendment 2
15.0% 2/12/2025
Event 12/31/2024
BlackRock, Inc. 13G/A Amendment 5 7.9% 2/7/2025
Event 1/31/2025

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q2 2 90.0 $16.2 k
2026 Q1 477 54.6 M $9.69 B
2025 Q4 405 56.3 M $7.32 B
2025 Q3 370 56.3 M $8.31 B
2025 Q2 391 57.6 M $9.69 B
2025 Q1 407 54.3 M $9.04 B
2024 Q4 384 51.4 M $8.51 B
2024 Q3 389 50.7 M $6.75 B
2024 Q2 379 50.2 M $6.32 B
2024 Q1 373 53.0 M $7.79 B
2023 Q4 377 51.4 M $6.02 B
2023 Q3 395 47.8 M $4.19 B
2023 Q2 435 46.0 M $7.57 B
2023 Q1 447 45.0 M $8.31 B
2022 Q4 426 46.2 M $6.83 B
2022 Q3 435 46.4 M $6.55 B
2022 Q2 436 44.3 M $5.81 B
2022 Q1 477 46.3 M $6.74 B
2021 Q4 539 46.4 M $13.6 B
2021 Q3 493 46.3 M $12.5 B
2021 Q2 485 45.9 M $11.1 B
2021 Q1 504 45.1 M $10.3 B
2020 Q4 519 46.6 M $12.5 B
2020 Q3 487 45.6 M $10.8 B
2020 Q2 501 45.9 M $10.5 B
2020 Q1 417 47.1 M $8.34 B
2019 Q4 399 45.9 M $7.26 B
2019 Q3 405 44.7 M $6.65 B
2019 Q2 406 45.5 M $6.77 B
2019 Q1 424 45.3 M $6.26 B
2018 Q4 388 45.1 M $4.84 B
2018 Q3 374 46.1 M $5.75 B
2018 Q2 350 45.0 M $4.42 B
2018 Q1 338 44.2 M $3.89 B
2017 Q4 352 44.1 M $3.74 B
2017 Q3 335 44.0 M $3.80 B
2017 Q2 349 44.0 M $4.01 B
2017 Q1 382 43.5 M $4.06 B
2016 Q4 329 41.3 M $2.80 B
2016 Q3 297 40.6 M $2.41 B
2016 Q2 272 39.5 M $2.08 B
2016 Q1 238 39.7 M $1.66 B
2015 Q4 243 40.4 M $1.68 B
2015 Q3 230 43.3 M $1.68 B
2015 Q2 205 40.9 M $1.58 B
2015 Q1 181 42.6 M $1.41 B
2014 Q4 183 42.8 M $1.13 B
2014 Q3 179 43.2 M $920 M
2014 Q2 181 46.9 M $1.11 B
2014 Q1 176 48.5 M $1.33 B