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
Metropolitan Life Insurance Co	12,138	$2.79M	0.04%	–	–
Storebrand Asset Management AS	12,142	$2.79M	0.01%	–	–
Arcadia Investment Management Corp	12,370	$2.84M	0.57%	–	–
Fiera Capital Corp	12,783	$2.94M	0.01%	–	–
Louisiana State Employees Retirement System	13,200	$3.03M	0.08%	–	–
Security Asset Management	13,248	$3.04M	1.25%	–	–
Employees Retirement System of Texas	13,400	$3.08M	0.04%	–	–
Cardinal Capital Management	13,543	$3.11M	0.69%	–	–
Thrivent Financial for Lutherans	13,686	$3.14M	0.01%	–	–
De Burlo Group Inc	13,752	$3.16M	0.57%	–	–
Ameritas Investment Partners, Inc.	13,999	$3.21M	0.12%	–	–
Royal London Asset Management Ltd	14,109	$3.24M	0.01%	–	–
Fjarde Ap-Fonden /Fourth Swedish National Pension Fund	14,300	$3.28M	0.03%	–	–
Ascent Wealth Partners, LLC	14,605	$3.35M	0.73%	–	–
BNP Paribas Arbitrage, SA	14,636	$3.36M	0.01%	–	–
Arizona State Retirement System	15,080	$3.46M	0.03%	–	–
Carmignac Gestion	16,101	$3.68M	0.04%	–	–
Stifel Financial Corp	16,213	$3.72M	0.01%	–	–
Autus Asset Management, LLC	16,353	$3.76M	0.44%	–	–
Prudential Financial Inc	16,418	$3.77M	0.01%	–	–
Susquehanna International Group, LLP	16,507	$3.79M	0.00%	–	–
Commonwealth of Pennsylvania Public School Empls Retrmt Sys	16,963	$3.90M	0.05%	–	–
Personal Capital Advisors Corp	17,010	$3.91M	0.02%	–	–
Brewin Dolphin Wealth Management Ltd	17,190	$3.95M	0.60%	–	–
Mandatum Life Insurance Co Ltd	17,279	$3.97M	0.79%	–	–
Nomura Holdings Inc	17,310	$3.98M	0.03%	–	–
Mitsubishi UFJ Kokusai Asset Management Co., Ltd.	18,422	$4.23M	0.03%	–	–
Treasurer of the State of North Carolina	18,702	$4.29M	0.03%	–	–
HSBC Holdings PLC	19,126	$4.38M	0.01%	–	–
KBC Group NV	19,148	$4.40M	0.02%	–	–
Pictet Asset Management Ltd	19,600	$4.50M	0.01%	–	–
Vontobel Holding Ltd.	19,707	$4.53M	0.03%	–	–
Polar Capital Holdings Plc	19,824	$4.55M	0.03%	–	–
Royce & Associates LP	20,000	$4.59M	0.03%	–	–
Candriam Luxembourg S.C.A.	18,179	$4.69M	0.04%	–	–
Brewin Dolphin Ltd	20,857	$4.79M	0.26%	–	–
North Star Asset Management Inc	20,875	$4.79M	0.29%	–	–
Qube Research & Technologies Ltd	21,134	$4.85M	0.08%	–	–
Unigestion Holding SA	21,324	$4.90M	0.17%	–	–
McKinley Capital Management LLC /Delaware	21,330	$4.90M	0.37%	–	–
Aviva PLC	21,693	$4.98M	0.02%	–	–
Advisors Asset Management, Inc.	21,736	$4.99M	0.08%	–	–
Oregon Public Employees Retirement Fund	21,839	$5.02M	0.06%	–	–
Shell Asset Management Co	22,208	$5.10M	0.10%	–	–
Jane Street Group, LLC	22,251	$5.11M	0.01%	–	–
State of Tennessee, Treasury Department	22,690	$5.21M	0.02%	–	–
Man Group plc	22,943	$5.27M	0.02%	–	–
Handelsinvest Investeringsforvaltning	23,000	$5.28M	0.64%	–	–
Railway Pension Investments Ltd	23,500	$5.40M	0.05%	–	–
Triasima Portfolio Management inc.	23,770	$5.46M	0.28%	–	–
State of Wisconsin Investment Board	23,827	$5.47M	0.01%	–	–
Asset Management One Co.,Ltd.	25,324	$5.82M	0.02%	–	–
MetLife Investment Management	26,264	$6.03M	0.06%	–	–
Envestnet Asset Management Inc	26,274	$6.03M	0.00%	–	–
Illinois Municipal Retirement Fund	26,727	$6.14M	0.27%	–	–
LPL Financial LLC	27,296	$6.27M	0.01%	–	–
Price T Rowe Associates Inc	28,053	$6.44M	0.00%	–	–
Banco Santander, S.A.	28,233	$6.48M	0.05%	–	–
Public Employees Retirement System of Ohio	30,632	$7.04M	0.03%	–	–
Russell Investments Group, Ltd.	30,652	$7.04M	0.01%	–	–
Voya Investment Management LLC	31,826	$7.31M	0.01%	–	–
Nomura Asset Management Co Ltd	32,772	$7.53M	0.05%	–	–
Dai-Ichi Life Insurance Company, Ltd	32,788	$7.53M	0.10%	–	–
State of New Jersey Common Pension Fund D	33,000	$7.58M	0.03%	–	–
Comerica Bank	31,273	$7.70M	0.05%	–	–
Paradigm Capital Management Inc	33,553	$7.71M	0.40%	–	–
2Xideas AG	33,752	$7.75M	0.86%	–	–
Royal Bank of Canada	33,823	$7.77M	0.00%	–	–
Erste Asset Management GmbH	34,000	$7.81M	0.19%	–	–
Teacher Retirement System of Texas	34,224	$7.86M	0.04%	–	–
Assenagon Asset Management S.A.	35,272	$8.10M	0.04%	–	–
State of Alaska, Department of Revenue	35,937	$8.25M	0.09%	–	–
Gabelli Funds LLC	36,200	$8.31M	0.06%	–	–
Citadel Advisors LLC	36,669	$8.42M	0.01%	–	–
Forte Capital LLC	37,821	$8.69M	1.34%	–	–
NS Partners Ltd	37,941	$8.71M	0.50%	–	–
Texas Permanent School Fund	37,986	$8.72M	0.11%	–	–
Cubist Systematic Strategies, LLC	38,119	$8.75M	0.11%	–	–
Bridgewater Associates, LP	38,453	$8.83M	0.08%	–	–
Mitsubishi UFJ Trust & Banking Corp	39,916	$9.18M	0.02%	–	–
Lombard Odier Asset Management (Switzerland) SA	40,000	$9.19M	0.61%	–	–
Eaton Vance Management	40,877	$9.39M	0.01%	–	–
Two Sigma Advisers, LP	41,800	$9.60M	0.03%	–	–
Ensign Peak Advisors, Inc	44,566	$10.2M	0.02%	–	–
Mutual of America Capital Management LLC	45,601	$10.5M	0.11%	–	–
Brown Capital Management LLC	46,665	$10.7M	0.08%	–	–
SEI Investments Co	45,289	$10.7M	0.03%	–	–
Bank of Nova Scotia	48,592	$11.2M	0.02%	–	–
AQR Capital Management LLC	51,558	$11.7M	0.02%	–	–
Great West Life Assurance Co	52,751	$12.1M	0.03%	–	–
British Columbia Investment Management Corp	56,263	$12.9M	0.09%	–	–
Logan Capital Management Inc	56,755	$13.0M	0.65%	–	–
Millennium Management LLC	57,540	$13.2M	0.02%	–	–
AXA S.A.	58,576	$13.5M	0.04%	–	–
New York State Teachers Retirement System	60,780	$14.0M	0.03%	–	–
Barclays PLC	60,946	$14.0M	0.01%	–	–
Two Sigma Investments, LP	61,736	$14.2M	0.04%	–	–
New York State Common Retirement Fund	62,335	$14.3M	0.02%	–	–
Federated Hermes, Inc.	64,158	$14.7M	0.03%	–	–
Bank of Montreal	63,355	$15.0M	0.01%	–	–