Masimo Corp

MASIDelisted Jun 10, 2026

Industry: Electromedical & Electrotherapeutic Apparatus
SEC CIK: 0000937556

SEC filings (opens in a new tab)

Masimo Corp was delisted on Jun 10, 2026; its insiders filed their last Form 4 on Jun 12, 2026; 451 institutions reported holding it in 13F filings for Q1 2026, worth $9.69B in total; Soros Fund Management was the only superinvestor holding it.

13F holders, Q1 2021

Institutional positions in Masimo Corp as of Mar 31, 2021. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders: 481; No complete 13F data for Q4 2020
Shares held: 45.1M; No complete 13F data for Q4 2020
Total value: $10.3B; No complete 13F data for Q4 2020

Holders and value by quarter

Institutions reporting MASI on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2021: 481 institutions

Value heldQ1 2021: $10.3B

Institutions holding MASI and their total value by quarter
Quarter	Holders	Value
Q2 2026	2	$16.2K
Q1 2026	451	$9.69B
Q4 2025	392	$7.20B
Q3 2025	358	$8.29B
Q2 2025	379	$9.68B
Q1 2025	393	$9.02B
Q4 2024	366	$8.50B
Q3 2024	362	$6.72B
Q2 2024	352	$6.24B
Q1 2024	339	$7.59B
Q4 2023	342	$5.91B
Q3 2023	357	$4.18B
Q2 2023	415	$7.56B
Q1 2023	428	$8.30B
Q4 2022	405	$6.58B
Q3 2022	418	$6.54B
Q2 2022	417	$5.81B
Q1 2022	457	$6.61B
Q4 2021	520	$13.6B
Q3 2021	475	$12.5B
Q2 2021	459	$11.1B
Q1 2021	481	$10.3B

Institutions, Q1 2021

Shares, value and share of portfolio for each institution holding Masimo Corp.

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.

Institutions holding MASI in Q1 2021
Institution	Shares	Value	% of portfolio	Change in shares	Action
Eukles Asset Management	9,546	$2.19M	1.42%	–	–
Twinbeech Capital LP	9,439	$2.17M	0.32%	–	–
Zurcher Kantonalbank (Zurich Cantonalbank)	9,391	$2.16M	0.01%	–	–
CIBC Asset Management Inc	9,354	$2.15M	0.01%	–	–
South Dakota Investment Council	9,355	$2.15M	0.04%	–	–
Utah Retirement Systems	9,321	$2.14M	0.03%	–	–
Voloridge Investment Management, LLC	9,106	$2.09M	0.02%	–	–
The PNC Financial Services Group, Inc.	9,019	$2.07M	0.00%	–	–
Holocene Advisors, LP	9,017	$2.07M	0.01%	–	–
New Mexico Educational Retirement Board	8,900	$2.04M	0.08%	–	–
Creative Planning	8,874	$2.04M	0.00%	–	–
EFG Asset Management (Americas) Corp.	8,815	$2.02M	0.41%	–	–
Tributary Capital Management, LLC	8,800	$2.02M	0.16%	–	–
Terry L. Blaker	8,688	$2.00M	0.13%	–	–
Baird Financial Group, Inc.	8,610	$1.98M	0.01%	–	–
Mirae Asset Global Investments Co., Ltd.	8,536	$1.96M	0.01%	–	–
Northwestern Mutual Investment Management Company, LLC	8,481	$1.95M	0.03%	–	–
HRT Financial LP	8,392	$1.93M	0.02%	–	–
Prudential PLC	8,318	$1.91M	0.01%	–	–
Birchview Capital, LP	8,000	$1.84M	1.09%	–	–
Crown Advisors Management, Inc.	8,000	$1.84M	1.44%	–	–
Fortis Capital Management LLC	8,000	$1.84M	1.06%	–	–
Brinker Capital Investments, LLC	7,980	$1.83M	0.03%	–	–
SG Americas Securities, LLC	7,903	$1.81M	0.01%	–	–
Brown Advisory Securities, LLC	7,861	$1.80M	0.31%	–	–
Kornitzer Capital Management Inc	7,720	$1.77M	0.03%	–	–
Public Employees Retirement Association of Colorado	7,537	$1.73M	0.01%	–	–
Point72 Hong Kong Ltd	7,451	$1.71M	0.14%	–	–
Azzad Asset Management Inc	7,341	$1.69M	0.28%	–	–
Teachers Retirement System of the State of Kentucky	7,326	$1.68M	0.02%	–	–
Congress Asset Management Co	7,101	$1.63M	0.01%	–	–
Alberta Investment Management Corp	7,100	$1.63M	0.01%	–	–
Doliver Advisors, LP	7,071	$1.62M	0.60%	–	–
Toronto Dominion Bank	7,065	$1.62M	0.00%	–	–
Tower Research Capital LLC (TRC)	6,995	$1.61M	0.03%	–	–
American Century Companies Inc	6,715	$1.54M	0.00%	–	–
Rathbone Brothers plc	6,600	$1.52M	0.02%	–	–
Landsberg, Bennett, & Dubbaneh LLC	6,227	$1.46M	0.21%	–	–
Hancock Whitney Corp	6,327	$1.45M	0.05%	–	–
Mitsubishi UFJ Asset Management (UK) Ltd.	6,300	$1.45M	0.64%	–	–
Fort, L.P.	6,245	$1.43M	0.40%	–	–
Private Advisor Group, LLC	6,172	$1.42M	0.01%	–	–
Robeco Institutional Asset Management B.V.	6,070	$1.39M	0.00%	–	–
Janney Montgomery Scott LLC	6,059	$1.39M	0.01%	–	–
Aigen Investment Management, LP	6,060	$1.39M	0.18%	–	–
Allianz Asset Management GmbH	6,025	$1.38M	0.00%	–	–
DekaBank Deutsche Girozentrale	6,086	$1.37M	0.00%	–	–
Crossmark Global Holdings, Inc.	5,906	$1.36M	0.03%	–	–
Brown Advisory Inc	5,708	$1.31M	0.00%	–	–
Truist Financial Corp	5,708	$1.31M	0.00%	–	–
OPSEU Pension Plan Trust Fund	5,591	$1.30M	0.34%	–	–
Andra AP-fonden	5,600	$1.29M	0.03%	–	–
Marshall Wace North America L.P.	5,551	$1.27M	0.01%	–	–
CIBC World Markets Corp	5,460	$1.25M	0.01%	–	–
Pacer Advisors, Inc.	5,422	$1.25M	0.02%	–	–
MML Investors Services, LLC	5,412	$1.24M	0.01%	–	–
Nissay Asset Management Corp	5,403	$1.24M	0.01%	–	–
Altman Advisors, Inc.	5,360	$1.23M	0.79%	–	–
IFM Investors Pty Ltd	5,335	$1.23M	0.03%	–	–
Standard Life Aberdeen plc	5,281	$1.21M	0.00%	–	–
Vestcor Inc	5,237	$1.20M	0.05%	–	–
ExodusPoint Capital Management, LP	5,224	$1.20M	0.02%	–	–
Aptus Capital Advisors, LLC	5,150	$1.18M	0.06%	–	–
Duality Advisers, LP	5,083	$1.17M	0.10%	–	–
Assetmark, Inc	4,867	$1.12M	0.01%	–	–
ProShare Advisors LLC	4,867	$1.12M	0.00%	–	–
Pitcairn Co	4,847	$1.11M	0.08%	–	–
Occudo Quantitative Strategies LP	4,825	$1.11M	0.24%	–	–
Securian Asset Management, Inc	4,801	$1.10M	0.02%	–	–
US Bancorp	4,796	$1.10M	0.00%	–	–
Diversified Trust Co	4,795	$1.10M	0.04%	–	–
Commonwealth Equity Services, LLC	4,570	$1.05M	0.00%	–	–
QS Investors, LLC	4,501	$1.03M	0.01%	–	–
STRS Ohio	4,487	$1.03M	0.00%	–	–
Paloma Partners Management Co	4,449	$1.02M	0.03%	–	–
Davidson Capital Management Inc.	4,425	$1.02M	0.53%	–	–
Martingale Asset Management L P	4,403	$1.01M	0.01%	–	–
Raymond James Financial Services Advisors, Inc.	4,347	$998.0K	0.00%	–	–
Moneta Group Investment Advisors LLC	4,219	$969.0K	0.05%	–	–
Trexquant Investment LP	4,002	$919.0K	0.08%	–	–
Westpac Banking Corp	3,952	$907.6K	0.01%	–	–
Nisa Investment Advisors, LLC	3,917	$900.0K	0.01%	–	–
Prescott Group Capital Management, L.L.C.	3,759	$863.0K	0.25%	–	–
Maryland State Retirement & Pension System	3,736	$858.0K	0.03%	–	–
Sumitomo Mitsui DS Asset Management Company, Ltd	3,684	$846.0K	0.02%	–	–
Institutional & Family Asset Management, LLC	3,650	$838.0K	0.16%	–	–
Meiji Yasuda Asset Management Co Ltd.	3,485	$800.0K	0.06%	–	–
Canada Pension Plan Investment Board	3,467	$796.0K	0.00%	–	–
Fosun International Ltd	3,500	$791.0K	0.06%	–	–
Oxford Financial Group Ltd	3,430	$788.0K	0.11%	–	–
Profund Advisors LLC	3,398	$780.0K	0.03%	–	–
Macquarie Group Ltd	3,385	$778.0K	0.00%	–	–
PEAK6 Investments LLC	3,384	$777.0K	0.02%	–	–
Arthur M. Cohen & Associates, LLC	3,341	$767.0K	0.18%	–	–
AlphaCrest Capital Management LLC	3,216	$739.0K	0.04%	–	–
Bridgefront Capital, LLC	3,205	$736.0K	0.23%	–	–
Marshall Wace, LLP	3,074	$706.0K	0.00%	–	–
Wolverine Asset Management LLC	3,009	$691.0K	0.01%	–	–
Bluestein R H & Co	3,000	$689.0K	0.03%	–	–
DAFNA Capital Management LLC	3,000	$689.0K	0.16%	–	–