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
Lombard Odier Asset Management (Switzerland) SA	40,000	$9.19M	0.61%	–	–
Mitsubishi UFJ Trust & Banking Corp	39,916	$9.18M	0.02%	–	–
Bridgewater Associates, LP	38,453	$8.83M	0.08%	–	–
Cubist Systematic Strategies, LLC	38,119	$8.75M	0.11%	–	–
Texas Permanent School Fund	37,986	$8.72M	0.11%	–	–
NS Partners Ltd	37,941	$8.71M	0.50%	–	–
Forte Capital LLC	37,821	$8.69M	1.34%	–	–
Citadel Advisors LLC	36,669	$8.42M	0.01%	–	–
Gabelli Funds LLC	36,200	$8.31M	0.06%	–	–
State of Alaska, Department of Revenue	35,937	$8.25M	0.09%	–	–
Assenagon Asset Management S.A.	35,272	$8.10M	0.04%	–	–
Teacher Retirement System of Texas	34,224	$7.86M	0.04%	–	–
Erste Asset Management GmbH	34,000	$7.81M	0.19%	–	–
Royal Bank of Canada	33,823	$7.77M	0.00%	–	–
2Xideas AG	33,752	$7.75M	0.86%	–	–
Paradigm Capital Management Inc	33,553	$7.71M	0.40%	–	–
Comerica Bank	31,273	$7.70M	0.05%	–	–
State of New Jersey Common Pension Fund D	33,000	$7.58M	0.03%	–	–
Dai-Ichi Life Insurance Company, Ltd	32,788	$7.53M	0.10%	–	–
Nomura Asset Management Co Ltd	32,772	$7.53M	0.05%	–	–
Voya Investment Management LLC	31,826	$7.31M	0.01%	–	–
Russell Investments Group, Ltd.	30,652	$7.04M	0.01%	–	–
Public Employees Retirement System of Ohio	30,632	$7.04M	0.03%	–	–
Banco Santander, S.A.	28,233	$6.48M	0.05%	–	–
Price T Rowe Associates Inc	28,053	$6.44M	0.00%	–	–
LPL Financial LLC	27,296	$6.27M	0.01%	–	–
Illinois Municipal Retirement Fund	26,727	$6.14M	0.27%	–	–
Envestnet Asset Management Inc	26,274	$6.03M	0.00%	–	–
MetLife Investment Management	26,264	$6.03M	0.06%	–	–
Asset Management One Co.,Ltd.	25,324	$5.82M	0.02%	–	–
State of Wisconsin Investment Board	23,827	$5.47M	0.01%	–	–
Triasima Portfolio Management inc.	23,770	$5.46M	0.28%	–	–
Railway Pension Investments Ltd	23,500	$5.40M	0.05%	–	–
Handelsinvest Investeringsforvaltning	23,000	$5.28M	0.64%	–	–
Man Group plc	22,943	$5.27M	0.02%	–	–
State of Tennessee, Treasury Department	22,690	$5.21M	0.02%	–	–
Jane Street Group, LLC	22,251	$5.11M	0.01%	–	–
Shell Asset Management Co	22,208	$5.10M	0.10%	–	–
Oregon Public Employees Retirement Fund	21,839	$5.02M	0.06%	–	–
Advisors Asset Management, Inc.	21,736	$4.99M	0.08%	–	–
Aviva PLC	21,693	$4.98M	0.02%	–	–
McKinley Capital Management LLC /Delaware	21,330	$4.90M	0.37%	–	–
Unigestion Holding SA	21,324	$4.90M	0.17%	–	–
Qube Research & Technologies Ltd	21,134	$4.85M	0.08%	–	–
North Star Asset Management Inc	20,875	$4.79M	0.29%	–	–
Brewin Dolphin Ltd	20,857	$4.79M	0.26%	–	–
Candriam Luxembourg S.C.A.	18,179	$4.69M	0.04%	–	–
Royce & Associates LP	20,000	$4.59M	0.03%	–	–
Polar Capital Holdings Plc	19,824	$4.55M	0.03%	–	–
Vontobel Holding Ltd.	19,707	$4.53M	0.03%	–	–
Pictet Asset Management Ltd	19,600	$4.50M	0.01%	–	–
KBC Group NV	19,148	$4.40M	0.02%	–	–
HSBC Holdings PLC	19,126	$4.38M	0.01%	–	–
Treasurer of the State of North Carolina	18,702	$4.29M	0.03%	–	–
Mitsubishi UFJ Kokusai Asset Management Co., Ltd.	18,422	$4.23M	0.03%	–	–
Nomura Holdings Inc	17,310	$3.98M	0.03%	–	–
Mandatum Life Insurance Co Ltd	17,279	$3.97M	0.79%	–	–
Brewin Dolphin Wealth Management Ltd	17,190	$3.95M	0.60%	–	–
Personal Capital Advisors Corp	17,010	$3.91M	0.02%	–	–
Commonwealth of Pennsylvania Public School Empls Retrmt Sys	16,963	$3.90M	0.05%	–	–
Susquehanna International Group, LLP	16,507	$3.79M	0.00%	–	–
Prudential Financial Inc	16,418	$3.77M	0.01%	–	–
Autus Asset Management, LLC	16,353	$3.76M	0.44%	–	–
Stifel Financial Corp	16,213	$3.72M	0.01%	–	–
Carmignac Gestion	16,101	$3.68M	0.04%	–	–
Arizona State Retirement System	15,080	$3.46M	0.03%	–	–
BNP Paribas Arbitrage, SA	14,636	$3.36M	0.01%	–	–
Ascent Wealth Partners, LLC	14,605	$3.35M	0.73%	–	–
Fjarde Ap-Fonden /Fourth Swedish National Pension Fund	14,300	$3.28M	0.03%	–	–
Royal London Asset Management Ltd	14,109	$3.24M	0.01%	–	–
Ameritas Investment Partners, Inc.	13,999	$3.21M	0.12%	–	–
De Burlo Group Inc	13,752	$3.16M	0.57%	–	–
Thrivent Financial for Lutherans	13,686	$3.14M	0.01%	–	–
Cardinal Capital Management	13,543	$3.11M	0.69%	–	–
Employees Retirement System of Texas	13,400	$3.08M	0.04%	–	–
Security Asset Management	13,248	$3.04M	1.25%	–	–
Louisiana State Employees Retirement System	13,200	$3.03M	0.08%	–	–
Fiera Capital Corp	12,783	$2.94M	0.01%	–	–
Arcadia Investment Management Corp	12,370	$2.84M	0.57%	–	–
Storebrand Asset Management AS	12,142	$2.79M	0.01%	–	–
Metropolitan Life Insurance Co	12,138	$2.79M	0.04%	–	–
Korea Investment CORP	12,100	$2.78M	0.01%	–	–
Skandinaviska Enskilda Banken AB (publ)	12,007	$2.76M	0.02%	–	–
Tudor Investment Corp Et Al	11,958	$2.75M	0.06%	–	–
Capital Impact Advisors, LLC	11,850	$2.72M	0.95%	–	–
Summit Global Investments	11,785	$2.71M	0.17%	–	–
Forsta Ap-Fonden	11,500	$2.64M	0.04%	–	–
Waverton Investment Management Ltd	11,462	$2.63M	0.12%	–	–
Seeyond	11,380	$2.61M	0.26%	–	–
Exchange Traded Concepts, LLC	11,368	$2.61M	0.10%	–	–
Capitolis Advisors LLC	11,358	$2.61M	0.05%	–	–
Guggenheim Capital LLC	10,941	$2.51M	0.02%	–	–
AMP Capital Investors Ltd	10,746	$2.46M	0.01%	–	–
Gulf International Bank (UK) Ltd	10,545	$2.42M	0.03%	–	–
Xponance, Inc.	10,397	$2.39M	0.05%	–	–
HighTower Advisors, LLC	10,188	$2.34M	0.01%	–	–
Northwest & Ethical Investments L.P.	9,965	$2.29M	0.08%	–	–
Magnetar Financial LLC	9,772	$2.24M	0.02%	–	–
Engineers Gate Manager LP	9,715	$2.23M	0.11%	–	–
Advisor Group Holdings, Inc.	9,584	$2.20M	0.01%	–	–