Masimo Corporation (MASI) Ownership

168.12 ↑2.82 (1.70%)

As of December 31, 1969, 7:00pm EST.

Institutions
Mutual Funds

Institutional Ownership

BlackRock Inc is the biggest individual institutional holder of Masimo Corporation (MASI), owning a total of 9.4 million shares. Combined, the top 45 institutional holders of MASI own 108.09% of the company with a total of 57.7 million shares.

In the latest ownership report on September 30th 2024, the top 45 institutional holders increased their combined ownership of MASI by 3.4 million shares. 13 institutions bought 4,101,009 total additional shares and increased their ownership by an average of 25.78%. However 4 institutions sold 689,320 total shares and decreased their ownership by an average of 12.95%.

Overall this is a positive sign as the number of shares owned by the top 20 institutional holders of Masimo Corporation increased by a net total of 3,411,689 in the latest quarter.

Institution Ownership Chart

Latest Institutional Ownership Changes

Owner	Percent Owned	Percent Change	Shares Owned	Share Change	Date Reported
FMR Inc	12.620%	41.183%	6,756,618	1,970,883	2024-09-30
Politan Capital Management LP	8.806%	0.000%	4,714,746	0	2024-09-30
Vanguard Group Inc	8.443%	-4.578%	4,520,487	-216,864	2024-09-30
T. Rowe Price Investment Management,Inc.	2.851%	32.238%	1,526,488	372,137	2024-09-30
RTW INVESTMENTS, LLC	2.731%	0.000%	1,462,400	0	2024-09-30
State Street Corp	2.687%	0.713%	1,438,814	10,179	2024-09-30
Westfield Capital Management Company, L.P.	2.604%	23.184%	1,394,056	262,370	2024-09-30
Westfield Capital Management Company, LP	2.604%	23.184%	1,394,056	262,370	2024-09-30
Capital Research Global Investors	2.541%	28.681%	1,360,328	303,192	2024-09-30
Farallon Capital Management, L.L.C.	2.351%	12.416%	1,258,563	139,000	2024-09-30
Ace Management Global Ltd.	1.803%	-8.994%	965,504	-95,415	2024-09-30
Holocene Advisors, LP	1.635%	-15.643%	875,159	-162,291	2024-09-30
Liontrust Investment Partners LLP	1.510%	0.000%	808,693	0	2024-09-30
Geode Capital Management, LLC	1.481%	1.535%	792,886	11,984	2024-09-30
Massachusetts Financial Services Company	1.480%	9.760%	792,166	70,440	2024-09-30
Alyeska Investment Group, L.P.	1.392%	72.911%	745,127	314,196	2024-09-30
Morgan Stanley - Brokerage Accounts	1.376%	-22.567%	736,856	-214,750	2024-09-30
Schroder Investment Management Group	1.368%	38.591%	732,621	203,998	2024-09-30
Dimensional Fund Advisors, Inc.	1.116%	13.719%	597,698	72,104	2024-09-30
Man Group PLC	0.747%	37.067%	399,945	108,156	2024-09-30

Top Institutions

Owner	Percent Owned	Percent Change	Shares Owned	Share Change	Date Reported
BlackRock Inc	17.466%	18.665%	9,351,239	1,470,865	2024-06-30
FMR Inc	12.620%	41.183%	6,756,618	1,970,883	2024-09-30
Politan Capital Management LP	8.806%	0.000%	4,714,746	0	2024-09-30
Vanguard Group Inc	8.443%	-4.578%	4,520,487	-216,864	2024-09-30
T. Rowe Price Investment Management,Inc.	2.851%	32.238%	1,526,488	372,137	2024-09-30
RTW INVESTMENTS, LLC	2.731%	0.000%	1,462,400	0	2024-09-30
State Street Corp	2.687%	0.713%	1,438,814	10,179	2024-09-30
Westfield Capital Management Company, L.P.	2.604%	23.184%	1,394,056	262,370	2024-09-30
Westfield Capital Management Company, LP	2.604%	23.184%	1,394,056	262,370	2024-09-30
Capital Research Global Investors	2.541%	28.681%	1,360,328	303,192	2024-09-30
State Street Corporation	2.557%	0.215%	1,360,322	2,920	2024-03-31
Farallon Capital Management, L.L.C.	2.351%	12.416%	1,258,563	139,000	2024-09-30
Thrivent Financial For Lutherans	2.274%	42.072%	1,217,357	360,497	2024-06-30
Eminence Capital LLC	1.961%	0.000%	1,036,253	1,036,253	2023-09-30
Ace Management Global Ltd.	1.803%	-8.994%	965,504	-95,415	2024-09-30
Champlain Investment Partners, LLC	1.778%	-1.784%	934,762	-16,980	2022-09-30
Holocene Advisors, LP	1.635%	-15.643%	875,159	-162,291	2024-09-30
Liontrust Investment Partners LLP	1.510%	0.000%	808,693	0	2024-09-30
Geode Capital Management, LLC	1.481%	1.535%	792,886	11,984	2024-09-30
Massachusetts Financial Services Company	1.480%	9.760%	792,166	70,440	2024-09-30
Jackson Square Partners, LLC	1.444%	-11.533%	762,329	-99,379	2023-12-31
Millennium Management LLC	1.408%	117.207%	753,743	406,727	2024-06-30
Alyeska Investment Group, L.P.	1.392%	72.911%	745,127	314,196	2024-09-30
Morgan Stanley - Brokerage Accounts	1.376%	-22.567%	736,856	-214,750	2024-09-30
Schroder Investment Management Group	1.368%	38.591%	732,621	203,998	2024-09-30
Fundsmith LLP	1.382%	-4.441%	730,377	-33,942	2023-06-30
Goldman Sachs Group Inc	1.386%	-14.945%	728,634	-128,030	2022-09-30
Point72 Asset Management, L.P.	1.266%	107.778%	677,677	351,523	2024-06-30
Sachem Head Capital Management LP	1.200%	0.000%	634,100	634,100	2023-09-30
Citigroup Inc	1.186%	12.397%	623,851	68,808	2022-09-30
Dimensional Fund Advisors, Inc.	1.116%	13.719%	597,698	72,104	2024-09-30
Hawk Ridge Management LLC	1.073%	124.411%	567,765	314,763	2023-09-30
Neuberger Berman Group LLC	0.955%	-5.750%	502,190	-30,639	2022-09-30
MARTIN CURRIE LTD	0.939%	-1.226%	495,910	-6,153	2023-09-30
Deutsche Bank AG	0.933%	88.094%	490,339	229,651	2022-06-30
T. Rowe Price Associates, Inc.	0.855%	2,148.120%	451,939	431,836	2023-09-30
ArrowMark Colorado Holdings, LLC (ArrowMark Partne	0.807%	40.569%	425,713	122,862	2023-12-31
Northern Trust Corp	0.790%	-9.766%	417,544	-45,190	2023-06-30
Man Group PLC	0.747%	37.067%	399,945	108,156	2024-09-30
BNP Paribas Investment Partners SA	0.746%	-5.193%	393,907	-21,577	2023-06-30
Sumitomo Mitsui Trust Holdings Inc	0.735%	-0.220%	391,026	-863	2024-06-30
Bank of New York Mellon Corp	0.733%	-0.297%	389,764	-1,161	2024-06-30
MIG Capital, LLC	0.718%	-14.655%	381,732	-65,547	2024-03-31
Two Sigma Advisers, LLC	0.680%	-8.860%	359,000	-34,900	2022-12-31
Charles Schwab Investment Management Inc	0.676%	-0.207%	357,134	-740	2023-06-30

Mutual Fund Ownership

Vanguard Total Stock Mkt Idx Inv is the biggest individual fund holder of Masimo Corporation (MASI), owning a total of 1.5 million shares. Combined, the top 56 mutual fund holders of MASI own 68.13% of the company with a total of 36.3 million shares.

In the latest ownership report on November 30th 2024, the top 56 fund holders increased their combined ownership of MASI by 135 thousand shares. 4 funds bought 105,909 total additional shares and increased their ownership by an average of 3.03%. However 3 funds sold 240,532 total shares and decreased their ownership by an average of 10.35%.

Overall this is a negative sign as the number of shares owned by the top 20 mutual funds holding Masimo Corporation decreased by a net total of -134,623 in the latest report.

Mutual Funds Chart

Latest Mutual Fund Ownership Changes

Owner	Percent Owned	Percent Change	Shares Owned	Share Change	Date Reported
Vanguard Total Stock Mkt Idx Inv	2.832%	-0.606%	1,516,249	-9,243	2024-11-30
iShares Core S&P Mid-Cap ETF	2.649%	0.000%	1,418,025	0	2024-11-30
Vanguard Small Cap Index	2.268%	0.584%	1,214,025	7,050	2024-11-30
BlackRock Mid-Cap Growth Equity Instl	1.812%	10.370%	970,331	91,166	2024-11-30
BlackRock Global Uncons Eq Z USD Acc	1.536%	-13.565%	822,498	-129,083	2024-11-30
Vanguard Small Cap Growth Index Inv	1.248%	0.688%	668,041	4,566	2024-11-30
Vanguard Institutional Extnd Mkt Idx Tr	1.235%	0.475%	661,044	3,127	2024-11-30
BlackRock GlbUncons Eq Fd (UK) Z GBPAcc	0.939%	-16.892%	502,847	-102,206	2024-11-30

Top Mutual Funds

Owner	Percent Owned	Percent Change	Shares Owned	Share Change	Date Reported
Vanguard Total Stock Mkt Idx Inv	2.832%	-0.606%	1,516,249	-9,243	2024-11-30
Vanguard Instl Ttl Stck Mkt Idx Tr	2.779%	-3.348%	1,468,169	-50,860	2023-03-31
iShares Core S&P Mid-Cap ETF	2.649%	0.000%	1,418,025	0	2024-11-30
Fidelity Select Medical Tech and Devcs	2.485%	9.089%	1,330,278	110,840	2024-10-31
Fidelity Select Health Care	2.465%	24.925%	1,320,000	263,369	2024-10-31
Vanguard Small Cap Index	2.268%	0.584%	1,214,025	7,050	2024-11-30
Select Medical Tech and Devcs	2.271%	4.348%	1,200,000	50,000	2023-11-30
Capital Group AMCAP Composite	2.244%	-0.131%	1,193,342	-1,559	2024-03-31
VA CollegeAmerica Amcap 529A	2.244%	-0.131%	1,193,342	-1,559	2024-03-31
American Funds SMALLCAP World A	2.195%	28.942%	1,175,334	263,811	2024-09-30
MFS Mid Cap Growth A	2.161%	90.240%	1,157,081	548,859	2024-10-31
Fidelity® Select Medical Tech and Devcs	2.176%	-17.857%	1,150,000	-250,000	2023-10-31
BlackRock Mid-Cap Growth Equity Instl	1.812%	10.370%	970,331	91,166	2024-11-30
BlackRock Global Uncons Eq Z USD Acc	1.536%	-13.565%	822,498	-129,083	2024-11-30
Fidelity Advisor Health Care I	1.494%	22.542%	800,000	147,161	2024-10-31
Fidelity® Select Health Care	1.514%	-24.679%	800,000	-262,123	2023-10-31
Select Health Care	1.514%	-24.679%	800,000	-262,123	2023-10-31
T. Rowe Price Small-Cap Stock	1.414%	10.132%	757,298	69,667	2024-10-31
Smithson Investment Trust Ord	1.308%	0.000%	691,140	0	2023-08-31
T. Rowe Price US Small-Cap Core Equity	1.284%	31.084%	687,631	163,059	2024-09-30
Vanguard Extended Market Index Investor	1.284%	0.353%	678,403	2,387	2023-08-31
Strategic Advisers Fidelity US TtlStk	1.260%	11.580%	674,500	70,000	2024-10-31
Vanguard Small Cap Growth Index Inv	1.248%	0.688%	668,041	4,566	2024-11-30
Vanguard Institutional Extnd Mkt Idx Tr	1.235%	0.475%	661,044	3,127	2024-11-30
MFS Mid Cap Growth Equity	1.136%	9.961%	608,222	55,097	2024-09-30
Fidelity Advisor® Health Care I	1.088%	8.491%	575,000	45,000	2023-11-30
VIP Growth Initial	0.978%	263.221%	516,500	374,300	2023-11-30
Thrivent Mid Cap Stock A	0.948%	3.163%	507,210	15,550	2024-06-30
BlackRock GlbUncons Eq Fd (UK) Z GBPAcc	0.939%	-16.892%	502,847	-102,206	2024-11-30
Fidelity Advisor® Equity Growth I	0.901%	273.333%	476,000	348,500	2023-11-30
BlackRock Unconstrained Equity Instl	0.868%	4.277%	464,905	19,069	2024-09-30
Fidelity® Puritan®	0.874%	60.942%	461,420	174,720	2023-05-31
Champlain Mid Cap Adv	0.809%	-1.163%	425,000	-5,000	2022-09-30
Fidelity VIP Mid Cap Initial	0.743%	37.955%	398,000	109,500	2024-10-31
Fidelity VIP Growth Initial	0.746%	-16.255%	396,200	-76,900	2024-03-31
BGF World Healthscience A2	0.718%	0.000%	384,569	0	2024-07-31
Fidelity Advisor Equity Growth I	0.709%	-13.377%	376,227	-58,100	2024-03-31
T. Rowe Price Instl Small-Cap Stock	0.699%	9.738%	374,132	33,200	2024-10-31
Fidelity® Growth Strategies	0.705%	1.085%	372,600	4,000	2023-10-31
Fidelity Capital Appreciation	0.663%	0.000%	350,600	0	2024-01-31
Fidelity® Capital Appreciation	0.664%	263.316%	350,600	254,100	2023-11-30
SPDR® S&P MIDCAP 400 ETF Trust	0.649%	-1.452%	347,282	-5,117	2024-10-31
Fidelity Mid-Cap Stock	0.638%	0.000%	341,244	0	2024-08-31
iShares S&P Mid-Cap 400 Growth ETF	0.637%	-0.202%	334,674	-676	2022-11-30
Fidelity® Mid-Cap Stock	0.590%	-0.765%	311,725	-2,402	2023-10-31
Fidelity® Balanced	0.585%	8.732%	308,823	24,800	2023-05-31
Strategic Advisers® Fidelity US TtlStk	0.576%	3.051%	304,000	9,000	2023-08-31
iShares US Medical Devices ETF	0.568%	0.098%	300,103	294	2023-10-31
American Funds Growth Fund of Amer A	0.558%	-0.334%	295,012	-988	2023-09-30
Capital Group Growth Fnd of Amer Comp	0.558%	-0.334%	295,012	-988	2023-09-30
Liontrust Sust Fut Glbl Gr 3 Net Acc	0.554%	0.000%	292,594	0	2023-07-31
Liontrust Sust Fut Mgd 3 Net Inc	0.515%	0.000%	271,567	0	2023-05-31
State St S&P Midcap® Indx SL Cl II	0.486%	-0.892%	255,668	-2,300	2023-03-31
Fidelity® Extended Market Index	0.460%	0.000%	241,582	0	2022-11-30
BNP Paribas Disrpt Tech Cl D	0.451%	2.393%	237,239	5,544	2022-11-30
State St Russell Sm/Mid Cp® Indx NL Cl C	0.446%	-9.666%	234,555	-25,098	2022-12-31