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

Historical Holders from Q1 2014 to Q3 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: 56,174,259
Holdings value: $8,285,426,272
% of all portfolios: 0.011%
Number of holders: 349
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)

Filer	Ownership	Change %	Holdings Value	Net Change	Nb Shares	Change %	Reporting Name	Report Period
FMR LLC	15%		$1,315,009,580		8,031,083		FMR LLC	31 Dec 2024
KIANI JOE E	11.1%	-2.7%	$940,885,036	-$30,552,146	6,376,720	-3.1%	Joe Kiani	30 Sep 2025
BlackRock Portfolio Management LLC	10.3%		$906,591,375		5,536,774		BlackRock Portfolio Management LLC	28 Feb 2025
BlackRock, Inc.	7.9%		$692,807,191		4,231,142		BlackRock, Inc.	31 Jan 2025

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

Period	Reported Shares, Excl. Options	Value, Excl. Options	Change	Puts Notional Value	Calls Notional Value	Price	Investors
2025 Q3	56,174,259	$8,285,426,272	-$247,825,073	$5,378,199	$5,334,856	$147.55	349
2025 Q2	57,531,263	$9,678,040,277	+$566,298,917	$3,818,594	$9,840,870	$168.22	375
2025 Q1	54,245,883	$9,034,866,757	+$448,557,462	$4,448,220	$6,747,300	$166.6	389
2024 Q4	51,411,548	$8,501,447,911	+$221,294,182	$10,801,328	$21,163,006	$165.3	362
2024 Q3	50,430,653	$6,717,968,664	+$195,557,848	$34,331,786	$39,730,208	$133.33	357
2024 Q2	49,545,428	$6,238,873,009	-$289,595,358	$36,472,224	$31,837,632	$125.94	350
2024 Q1	51,603,603	$7,578,656,800	+$54,858,314	$37,241,160	$25,757,215	$146.85	330
2023 Q4	50,338,512	$5,900,007,837	+$429,947,280	$46,790,232	$111,337,861	$117.21	333
2023 Q3	47,611,421	$4,174,934,463	-$49,427,852	$47,952,192	$196,233,520	$87.68	349
2023 Q2	45,905,078	$7,556,450,399	+$147,455,979	$5,728,716	$29,721,858	$164.55	406
2023 Q1	44,980,748	$8,299,415,764	+$131,407,346	$5,759,156	$25,097,200	$184.54	422
2022 Q4	44,446,198	$6,576,885,382	-$261,109,381	$7,442,060	$15,948,385	$147.95	399
2022 Q3	46,357,468	$6,545,831,305	+$305,043,460	$4,997,000	$5,787,000	$141.16	405
2022 Q2	44,331,887	$5,805,221,289	-$135,171,216	$11,198,000	$8,951,000	$130.67	394
2022 Q1	45,258,877	$6,588,554,196	-$700,651,716	$13,607,000	$25,091,000	$145.54	435
2021 Q4	46,324,863	$13,546,650,154	-$6,634,536	$16,279,000	$57,549,000	$292.78	502
2021 Q3	46,260,495	$12,512,067,827	+$159,621,988	$14,103,000	$63,995,000	$270.71	457
2021 Q2	45,755,768	$11,088,901,374	+$303,542,126	$20,640,000	$74,064,000	$242.45	447
2021 Q1	45,034,445	$10,334,233,469	-$154,653,705	$20,529,000	$44,281,000	$229.66	469
2020 Q4	46,134,675	$12,367,769,029	+$118,456,546	$14,599,000	$36,359,000	$268.38	480
2020 Q3	45,513,746	$10,736,770,297	-$426,567	$31,982,000	$68,449,000	$236.06	449
2020 Q2	45,565,863	$10,382,684,886	-$45,339,410	$39,564,000	$69,136,000	$227.99	467
2020 Q1	45,927,274	$8,139,877,716	+$51,831,017	$9,800,000	$23,659,000	$177.12	394
2019 Q4	44,938,202	$7,100,269,622	+$134,499,433	$6,537,000	$7,322,000	$158.06	376
2019 Q3	44,078,987	$6,554,014,971	-$26,539,658	$7,454,000	$6,026,000	$148.79	387
2019 Q2	44,253,000	$6,579,080,937	+$87,334,220	$7,783,000	$6,206,000	$148.82	380
2019 Q1	44,448,873	$6,143,880,819	+$95,355,328	$15,446,000	$8,407,000	$138.28	397
2018 Q4	43,916,003	$4,715,440,176	+$4,670,131	$5,152,000	$6,943,000	$107.37	362
2018 Q3	43,758,851	$5,449,391,811	+$30,553,990	$8,756,000	$6,089,000	$124.54	347
2018 Q2	43,689,354	$4,266,798,989	+$9,236,648	$5,674,000	$2,783,000	$97.65	334
2018 Q1	43,588,229	$3,833,601,534	+$188,073,886	$11,241,000	$14,003,000	$87.95	319
2017 Q4	43,928,863	$3,723,381,823	-$101,698,184	$5,741,000	$4,325,000	$84.8	333
2017 Q3	43,964,692	$3,803,529,775	-$1,695,010	$10,162,000	$7,393,000	$86.56	316
2017 Q2	43,952,421	$4,007,992,911	+$119,093,443	$8,050,000	$5,252,000	$91.18	330
2017 Q1	42,650,521	$3,978,048,815	+$842,907,910	$8,506,000	$13,350,000	$93.26	363
2016 Q4	40,449,406	$2,726,201,878	-$2,875,693	$1,442,000	$4,152,000	$67.4	308
2016 Q3	40,553,020	$2,411,634,707	+$66,436,055	$0	$1,000,000	$59.49	290
2016 Q2	39,482,461	$2,073,623,320	+$7,155,965	$6,302,000	$7,189,000	$52.51	261
2016 Q1	39,653,579	$1,658,291,704	-$7,451,543	$360,000	$2,284,000	$41.84	223
2015 Q4	39,855,135	$1,654,226,332	-$19,334,090	$1,660,000	$1,905,000	$41.51	234
2015 Q3	40,350,761	$1,555,877,307	-$10,152,670	$1,889,000	$2,784,000	$38.56	216
2015 Q2	40,873,752	$1,583,092,408	-$59,576,606	$1,217,000	$2,239,000	$38.74	198
2015 Q1	42,183,688	$1,389,342,995	+$18,569,076	$1,042,000	$36,000	$32.98	174
2014 Q4	42,045,270	$1,107,548,336	-$9,241,122	$55,000	$277,000	$26.34	177
2014 Q3	43,030,779	$915,663,226	-$56,283,952	$958,000	$6,020,000	$21.28	166
2014 Q2	45,421,118	$1,071,924,710	-$84,818,879	$0	$0	$23.6	176
2014 Q1	48,536,107	$1,325,418,870	+$23,725,182	$710,000	$227,000	$27.31	168