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

Historical Holders from Q1 2014 to Q4 2025

Type / Class: Equity / Common Stock, $0.0001 par value
Symbol: MASI on Nasdaq
Shares outstanding: 57,447,928
Price per share: $130.06
All holders as of 30 Sep 2025: Q3 2025
Total 13F shares as of 30 Sep 2025: 56,174,327
Total reported value: $8,285,436,108
% of total 13F portfolios: 0.01%
Share change: -1,370,499
Value change: -$247,825,085
Avg buy value change: +0%
Avg sell value change: -0%
Number of holders: 350
Price from insider filings: $152.43

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 filing 13F forms. They hold 56,174,327 shares. of 57,447,928 outstanding shares (98%) .

Top 25 institutional shareholders own 83% of the company.

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	Puts Notional Value	Calls Notional Value	Price (% of par)	Investors
2025 Q4	120,831	$15,816,996	+$8,706,708			13,006.01%	17
2025 Q3	56,174,327	$8,285,436,108	-$247,825,085	$5,378,199	$5,334,856	14,755%	350
2025 Q2	57,531,263	$9,678,040,277	+$566,298,906	$3,818,594	$9,840,870	16,822%	375
2025 Q1	54,245,883	$9,034,866,701	+$448,557,473	$4,448,220	$6,747,300	16,660%	389
2024 Q4	51,387,515	$8,497,353,828	+$264,201,395	$10,801,328	$21,163,006	16,530%	358
2024 Q3	50,151,547	$6,680,755,148	+$161,351,870	$34,331,786	$39,730,208	13,333%	357
2024 Q2	49,498,741	$6,233,236,299	-$282,963,553	$36,472,224	$31,837,632	12,594%	350
2024 Q1	51,543,238	$7,569,792,681	+$49,812,373	$37,241,160	$26,175,515	14,685%	334
2023 Q4	58,510	$6,857,958	-$4,100,188			11,721%	4
2023 Q3	47,024,687	$4,123,488,986	-$32,238,615	$47,952,192	$196,233,520	8,768%	342
2023 Q2	45,388,454	$7,471,439,414	+$84,069,054	$5,728,716	$29,721,858	16,455%	399
2023 Q1	44,656,390	$8,239,558,497	+$131,662,278	$5,759,156	$25,097,200	18,454%	416
2022 Q4	44,394,132	$6,569,182,079	-$271,814,729	$7,442,060	$15,998,385	14,795%	394
2022 Q3	46,182,960	$6,520,685,231	+$325,672,401	$4,997,000	$5,787,000	14,116%	398
2022 Q2	44,007,009	$5,760,732,743	-$155,221,634	$8,101,000	$8,690,000	13,067%	384
2022 Q1	45,237,317	$6,585,408,718	-$684,278,223	$13,607,000	$25,094,000	14,553.99%	430
2021 Q4	46,268,302	$13,529,841,805	-$7,539,927	$16,279,000	$57,549,000	29,277.97%	496
2021 Q3	46,206,721	$12,497,500,704	+$153,032,704	$14,103,000	$64,038,000	27,070.93%	460
2021 Q2	43,451,957	$10,530,332,030	+$400,153,646	$20,882,080	$74,306,000	24,244.94%	441
2021 Q1	43,812,815	$10,053,919,858	-$189,229,600	$20,529,080	$44,281,000	22,965.94%	466
2020 Q4	45,872,556	$12,297,454,019	+$115,072,896	$14,599,080	$36,359,000	26,837.87%	472
2020 Q3	45,477,432	$10,728,186,547	-$6,055,390	$31,982,056	$68,449,000	23,605.99%	446
2020 Q2	45,317,797	$10,326,123,181	-$78,577,860	$39,564,056	$69,159,000	22,799%	463
2020 Q1	45,847,998	$8,124,881,963	+$50,949,721	$9,800,021	$23,659,000	17,711.97%	388
2019 Q4	44,925,099	$7,098,197,622	+$133,853,264	$6,537,011	$7,322,000	15,805.96%	374
2019 Q3	44,078,097	$6,553,885,127	-$26,548,463	$7,454,047	$6,026,000	14,878.96%	385
2019 Q2	44,159,312	$6,565,139,937	+$189,170,008	$7,783,000	$6,206,000	14,881.98%	377
2019 Q1	44,448,684	$6,143,854,819	+$93,807,123	$15,446,000	$8,407,000	13,827.91%	396
2018 Q4	43,888,247	$4,712,462,449	+$2,595,499	$5,152,000	$6,943,000	10,736.98%	359
2018 Q3	43,754,642	$5,448,868,966	+$30,127,075	$8,756,000	$6,089,000	12,453.96%	345
2018 Q2	43,661,648	$4,264,093,989	+$59,513,113	$5,674,000	$2,783,000	9,765%	332
2018 Q1	43,585,529	$3,833,364,324	+$188,144,686	$11,241,000	$14,003,000	8,794.99%	318
2017 Q4	43,914,923	$3,722,200,444	-$101,135,220	$5,741,000	$4,336,000	8,480.02%	330
2017 Q3	43,749,075	$3,784,868,786	-$3,172,979	$10,162,000	$7,393,000	8,655.99%	312
2017 Q2	43,682,265	$3,983,360,821	+$120,828,072	$8,037,000	$5,235,000	9,117.97%	328
2017 Q1	42,643,331	$3,977,379,084	+$742,965,596	$8,506,000	$13,350,000	9,326%	361
2016 Q4	40,388,723	$2,722,111,878	-$1,181,899	$1,442,000	$4,152,000	6,739.98%	306
2016 Q3	40,552,983	$2,411,632,707	+$66,512,025	$0	$1,000,000	5,948.98%	289
2016 Q2	39,051,307	$2,050,982,320	+$8,265,529	$6,302,000	$7,189,000	5,251.47%	259
2016 Q1	38,850,492	$1,624,689,704	-$4,801,479	$361,000	$2,284,000	4,184%	219
2015 Q4	39,384,664	$1,634,697,332	-$17,705,123	$1,660,000	$1,905,000	4,151%	231
2015 Q3	40,319,094	$1,554,656,307	-$9,396,442	$1,889,000	$2,784,000	3,855.99%	215
2015 Q2	40,303,816	$1,561,013,408	-$59,583,050	$1,217,000	$2,239,000	3,873.96%	197
2015 Q1	42,183,688	$1,389,342,995	+$18,560,571	$1,042,000	$36,000	3,298%	175
2014 Q4	42,045,270	$1,107,548,336	-$9,755,915	$55,000	$277,000	2,634%	177
2014 Q3	43,030,779	$915,663,226	-$53,197,821	$958,000	$6,020,000	2,128%	166
2014 Q2	45,421,118	$1,071,924,710	-$84,820,013	$0	$0	2,359.98%	176
2014 Q1	48,450,191	$1,323,072,870	+$23,846,061	$710,000	$227,000	2,730.99%	167