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
Westpac Banking Corp	3,952	$907.6K	0.01%	–	–
Trexquant Investment LP	4,002	$919.0K	0.08%	–	–
Moneta Group Investment Advisors LLC	4,219	$969.0K	0.05%	–	–
Raymond James Financial Services Advisors, Inc.	4,347	$998.0K	0.00%	–	–
Martingale Asset Management L P	4,403	$1.01M	0.01%	–	–
Davidson Capital Management Inc.	4,425	$1.02M	0.53%	–	–
Paloma Partners Management Co	4,449	$1.02M	0.03%	–	–
STRS Ohio	4,487	$1.03M	0.00%	–	–
QS Investors, LLC	4,501	$1.03M	0.01%	–	–
Commonwealth Equity Services, LLC	4,570	$1.05M	0.00%	–	–
US Bancorp	4,796	$1.10M	0.00%	–	–
Diversified Trust Co	4,795	$1.10M	0.04%	–	–
Securian Asset Management, Inc	4,801	$1.10M	0.02%	–	–
Occudo Quantitative Strategies LP	4,825	$1.11M	0.24%	–	–
Pitcairn Co	4,847	$1.11M	0.08%	–	–
Assetmark, Inc	4,867	$1.12M	0.01%	–	–
ProShare Advisors LLC	4,867	$1.12M	0.00%	–	–
Duality Advisers, LP	5,083	$1.17M	0.10%	–	–
Aptus Capital Advisors, LLC	5,150	$1.18M	0.06%	–	–
ExodusPoint Capital Management, LP	5,224	$1.20M	0.02%	–	–
Vestcor Inc	5,237	$1.20M	0.05%	–	–
Standard Life Aberdeen plc	5,281	$1.21M	0.00%	–	–
IFM Investors Pty Ltd	5,335	$1.23M	0.03%	–	–
Altman Advisors, Inc.	5,360	$1.23M	0.79%	–	–
Nissay Asset Management Corp	5,403	$1.24M	0.01%	–	–
MML Investors Services, LLC	5,412	$1.24M	0.01%	–	–
Pacer Advisors, Inc.	5,422	$1.25M	0.02%	–	–
CIBC World Markets Corp	5,460	$1.25M	0.01%	–	–
Marshall Wace North America L.P.	5,551	$1.27M	0.01%	–	–
Andra AP-fonden	5,600	$1.29M	0.03%	–	–
OPSEU Pension Plan Trust Fund	5,591	$1.30M	0.34%	–	–
Truist Financial Corp	5,708	$1.31M	0.00%	–	–
Brown Advisory Inc	5,708	$1.31M	0.00%	–	–
Crossmark Global Holdings, Inc.	5,906	$1.36M	0.03%	–	–
DekaBank Deutsche Girozentrale	6,086	$1.37M	0.00%	–	–
Allianz Asset Management GmbH	6,025	$1.38M	0.00%	–	–
Janney Montgomery Scott LLC	6,059	$1.39M	0.01%	–	–
Aigen Investment Management, LP	6,060	$1.39M	0.18%	–	–
Robeco Institutional Asset Management B.V.	6,070	$1.39M	0.00%	–	–
Private Advisor Group, LLC	6,172	$1.42M	0.01%	–	–
Fort, L.P.	6,245	$1.43M	0.40%	–	–
Mitsubishi UFJ Asset Management (UK) Ltd.	6,300	$1.45M	0.64%	–	–
Hancock Whitney Corp	6,327	$1.45M	0.05%	–	–
Landsberg, Bennett, & Dubbaneh LLC	6,227	$1.46M	0.21%	–	–
Rathbone Brothers plc	6,600	$1.52M	0.02%	–	–
American Century Companies Inc	6,715	$1.54M	0.00%	–	–
Tower Research Capital LLC (TRC)	6,995	$1.61M	0.03%	–	–
Toronto Dominion Bank	7,065	$1.62M	0.00%	–	–
Doliver Advisors, LP	7,071	$1.62M	0.60%	–	–
Congress Asset Management Co	7,101	$1.63M	0.01%	–	–
Alberta Investment Management Corp	7,100	$1.63M	0.01%	–	–
Teachers Retirement System of the State of Kentucky	7,326	$1.68M	0.02%	–	–
Azzad Asset Management Inc	7,341	$1.69M	0.28%	–	–
Point72 Hong Kong Ltd	7,451	$1.71M	0.14%	–	–
Public Employees Retirement Association of Colorado	7,537	$1.73M	0.01%	–	–
Kornitzer Capital Management Inc	7,720	$1.77M	0.03%	–	–
Brown Advisory Securities, LLC	7,861	$1.80M	0.31%	–	–
SG Americas Securities, LLC	7,903	$1.81M	0.01%	–	–
Brinker Capital Investments, LLC	7,980	$1.83M	0.03%	–	–
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%	–	–
Prudential PLC	8,318	$1.91M	0.01%	–	–
HRT Financial LP	8,392	$1.93M	0.02%	–	–
Northwestern Mutual Investment Management Company, LLC	8,481	$1.95M	0.03%	–	–
Mirae Asset Global Investments Co., Ltd.	8,536	$1.96M	0.01%	–	–
Baird Financial Group, Inc.	8,610	$1.98M	0.01%	–	–
Terry L. Blaker	8,688	$2.00M	0.13%	–	–
Tributary Capital Management, LLC	8,800	$2.02M	0.16%	–	–
EFG Asset Management (Americas) Corp.	8,815	$2.02M	0.41%	–	–
Creative Planning	8,874	$2.04M	0.00%	–	–
New Mexico Educational Retirement Board	8,900	$2.04M	0.08%	–	–
The PNC Financial Services Group, Inc.	9,019	$2.07M	0.00%	–	–
Holocene Advisors, LP	9,017	$2.07M	0.01%	–	–
Voloridge Investment Management, LLC	9,106	$2.09M	0.02%	–	–
Utah Retirement Systems	9,321	$2.14M	0.03%	–	–
CIBC Asset Management Inc	9,354	$2.15M	0.01%	–	–
South Dakota Investment Council	9,355	$2.15M	0.04%	–	–
Zurcher Kantonalbank (Zurich Cantonalbank)	9,391	$2.16M	0.01%	–	–
Twinbeech Capital LP	9,439	$2.17M	0.32%	–	–
Eukles Asset Management	9,546	$2.19M	1.42%	–	–
Advisor Group Holdings, Inc.	9,584	$2.20M	0.01%	–	–
Engineers Gate Manager LP	9,715	$2.23M	0.11%	–	–
Magnetar Financial LLC	9,772	$2.24M	0.02%	–	–
Northwest & Ethical Investments L.P.	9,965	$2.29M	0.08%	–	–
HighTower Advisors, LLC	10,188	$2.34M	0.01%	–	–
Xponance, Inc.	10,397	$2.39M	0.05%	–	–
Gulf International Bank (UK) Ltd	10,545	$2.42M	0.03%	–	–
AMP Capital Investors Ltd	10,746	$2.46M	0.01%	–	–
Guggenheim Capital LLC	10,941	$2.51M	0.02%	–	–
Capitolis Advisors LLC	11,358	$2.61M	0.05%	–	–
Exchange Traded Concepts, LLC	11,368	$2.61M	0.10%	–	–
Seeyond	11,380	$2.61M	0.26%	–	–
Waverton Investment Management Ltd	11,462	$2.63M	0.12%	–	–
Forsta Ap-Fonden	11,500	$2.64M	0.04%	–	–
Summit Global Investments	11,785	$2.71M	0.17%	–	–
Capital Impact Advisors, LLC	11,850	$2.72M	0.95%	–	–
Tudor Investment Corp Et Al	11,958	$2.75M	0.06%	–	–
Skandinaviska Enskilda Banken AB (publ)	12,007	$2.76M	0.02%	–	–
Korea Investment CORP	12,100	$2.78M	0.01%	–	–