MASIMO CORP - Common Stock, $0.0001 par value (MASI)

Historical Holders from Q1 2014 to Q4 2025

Symbol
MASI on Nasdaq
Type / Class
Equity / Common Stock, $0.0001 par value
Shares outstanding
57,447,928
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares, excl. options
56,174,327
Holdings value
$8,285,436,108
% of all portfolios
0.01%
Number of holders
350
Number of buys
159
Number of sells
187
Average buys %
+0%
Average sells %
-0%
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of MASIMO CORP - Common Stock, $0.0001 par value (MASI) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
FMR LLC 15% $1,321,675,379 8,031,083 FMR LLC 31 Dec 2024
KIANI JOE E 11% -2.7% $940,885,036 -$30,552,146 6,376,720 -3.1% Joe Kiani 30 Sep 2025
BlackRock Portfolio Management LLC 10% $911,186,897 5,536,774 BlackRock Portfolio Management LLC 28 Feb 2025
BlackRock, Inc. 7.9% $696,319,039 4,231,142 BlackRock, Inc. 31 Jan 2025
As of 30 Sep 2025 MASIMO CORP - Common Stock, $0.0001 par value (MASI) has 350 institutional shareholders that have filed 13F forms with the Securities Exchange Commission (SEC). These institutions hold a total of 56,174,327 shares of 57,447,928 outstanding shares and own 98% of the company stock as of 30 Sep 2025.

Top 25 institutional shareholders of MASIMO CORP - Common Stock, $0.0001 par value (MASI) own 83% of the company based on 13F filings as of 30 Sep 2025

Filer Ownership Nb Shares Share Change % Portfolio % Holdings Value
BlackRock, Inc. 18% 10,361,091 -1.4% 0.03% $1,528,779,050
FMR LLC 14% 8,213,721 +0.4% 0.06% $1,211,934,519
VANGUARD GROUP INC 8.4% 4,810,011 +3.7% 0.01% $709,717,123
Politan Capital Management LP 8% 4,589,648 -2.7% 62% $677,202,562
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 4.6% 2,619,960 +6.1% 0.12% $386,575,098
T. Rowe Price Investment Management, Inc. 3.7% 2,126,763 -15% 0.19% $313,804,000
Capital Research Global Investors 3.2% 1,854,128 -0.08% 0.05% $273,576,586
STATE STREET CORP 2.6% 1,484,471 -0.13% 0.01% $219,033,696
WESTFIELD CAPITAL MANAGEMENT CO LP 2.5% 1,419,250 +20% 0.88% $209,410,274
Alyeska Investment Group, L.P. 2.4% 1,381,085 +22% 0.62% $203,779,092
VIKING GLOBAL INVESTORS LP 1.9% 1,073,433 +40% 0.41% $158,385,039
GEODE CAPITAL MANAGEMENT, LLC 1.6% 942,439 +5.1% 0.01% $139,080,035
GOLDMAN SACHS GROUP INC 1.3% 744,402 +58% 0.02% $109,836,515
MORGAN STANLEY 1.2% 690,601 -10% 0.01% $101,898,663
RTW INVESTMENTS, LP 1.2% 683,294 0% 1.2% $100,820,030
Liontrust Investment Partners LLP 1.2% 681,895 -3.7% 1.5% $100,613,607
Squarepoint Ops LLC 1.1% 620,932 +739% 0.2% $91,618,517
Durable Capital Partners LP 1.1% 620,619 -47% 0.68% $91,572,333
PRICE T ROWE ASSOCIATES INC /MD/ 0.9% 514,946 +27% 0.01% $75,981,000
AMERIPRISE FINANCIAL INC 0.8% 460,951 +17% 0.02% $68,013,321
BANK OF AMERICA CORP /DE/ 0.71% 405,061 +113% 0% $59,766,751
Sumitomo Mitsui Trust Group, Inc. 0.69% 397,248 -16% 0.03% $58,613,942
NORTHERN TRUST CORP 0.68% 392,142 +0.93% 0.01% $57,860,553
BAMCO INC /NY/ 0.68% 388,747 +1.1% 0.15% $57,359,620
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.63% 364,457 -1.7% 0.01% $53,775,630

Institutional Holders of MASIMO CORP - Common Stock, $0.0001 par value (MASI) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price Investors
2025 Q4 5,040 $655,321 -$79,466 $130.06 6
2025 Q3 56,174,327 $8,285,436,108 -$247,825,085 $147.55 350
2025 Q2 57,531,263 $9,678,040,277 +$566,298,906 $168.22 375
2025 Q1 54,245,883 $9,034,866,701 +$448,557,473 $166.60 389
2024 Q4 51,387,515 $8,497,353,828 +$264,201,395 $165.30 358
2024 Q3 50,151,547 $6,680,755,148 +$161,351,870 $133.33 357
2024 Q2 49,498,741 $6,233,236,299 -$282,963,553 $125.94 350
2024 Q1 51,543,238 $7,569,792,681 +$49,812,373 $146.85 334
2023 Q4 58,510 $6,857,958 -$4,100,188 $117.21 4
2023 Q3 47,024,687 $4,123,488,986 -$32,238,615 $87.68 342
2023 Q2 45,388,454 $7,471,439,414 +$84,069,054 $164.55 399
2023 Q1 44,656,390 $8,239,558,497 +$131,662,278 $184.54 416
2022 Q4 44,394,132 $6,569,182,079 -$271,814,729 $147.95 394
2022 Q3 46,182,960 $6,520,685,231 +$325,672,401 $141.16 398
2022 Q2 44,007,009 $5,760,732,743 -$155,221,634 $130.67 384
2022 Q1 45,237,317 $6,585,408,718 -$684,278,223 $145.54 430
2021 Q4 46,268,302 $13,529,841,805 -$7,539,927 $292.78 496
2021 Q3 46,206,721 $12,497,500,704 +$153,032,704 $270.71 460
2021 Q2 43,451,957 $10,530,332,030 +$400,153,646 $242.45 441
2021 Q1 43,812,815 $10,053,919,858 -$189,229,600 $229.66 466
2020 Q4 45,872,556 $12,297,454,019 +$115,072,896 $268.38 472
2020 Q3 45,477,432 $10,728,186,547 -$6,055,390 $236.06 446
2020 Q2 45,317,797 $10,326,123,181 -$78,577,860 $227.99 463
2020 Q1 45,847,998 $8,124,881,963 +$50,949,721 $177.12 388
2019 Q4 44,925,099 $7,098,197,622 +$133,853,264 $158.06 374
2019 Q3 44,078,097 $6,553,885,127 -$26,548,463 $148.79 385
2019 Q2 44,159,312 $6,565,139,937 +$189,170,008 $148.82 377
2019 Q1 44,448,684 $6,143,854,819 +$93,807,123 $138.28 396
2018 Q4 43,888,247 $4,712,462,449 +$2,595,499 $107.37 359
2018 Q3 43,754,642 $5,448,868,966 +$30,127,075 $124.54 345
2018 Q2 43,661,648 $4,264,093,989 +$59,513,113 $97.65 332
2018 Q1 43,585,529 $3,833,364,324 +$188,144,686 $87.95 318
2017 Q4 43,914,923 $3,722,200,444 -$101,135,220 $84.80 330
2017 Q3 43,749,075 $3,784,868,786 -$3,172,979 $86.56 312
2017 Q2 43,682,265 $3,983,360,821 +$120,828,072 $91.18 328
2017 Q1 42,643,331 $3,977,379,084 +$742,965,596 $93.26 361
2016 Q4 40,388,723 $2,722,111,878 -$1,181,899 $67.40 306
2016 Q3 40,552,983 $2,411,632,707 +$66,512,025 $59.49 289
2016 Q2 39,051,307 $2,050,982,320 +$8,265,529 $52.51 259
2016 Q1 38,850,492 $1,624,689,704 -$4,801,479 $41.84 219
2015 Q4 39,384,664 $1,634,697,332 -$17,705,123 $41.51 231
2015 Q3 40,319,094 $1,554,656,307 -$9,396,442 $38.56 215
2015 Q2 40,303,816 $1,561,013,408 -$59,583,050 $38.74 197
2015 Q1 42,183,688 $1,389,342,995 +$18,560,571 $32.98 175
2014 Q4 42,045,270 $1,107,548,336 -$9,755,915 $26.34 177
2014 Q3 43,030,779 $915,663,226 -$53,197,821 $21.28 166
2014 Q2 45,421,118 $1,071,924,710 -$84,820,013 $23.60 176
2014 Q1 48,450,191 $1,323,072,870 +$23,846,061 $27.31 167