What does CUSIP 574795100 represent in this 13F holders report?

CUSIP 574795100 is the security identifier for MASI - MASIMO CORP - Common Stock used to aggregate holder disclosures.

How many institutions held MASI - MASIMO CORP - Common Stock in Q1 2021?

469 institutional investors reported MASI - MASIMO CORP - Common Stock for Q1 2021. Use the holders table for investor-level position and value details.

MASIMO CORP - Common Stock (MASI)

CUSIP: 574795100

Q1 2021 13F Holders as of 31 Mar 2021

Type / Class: Equity / Common Stock
Shares outstanding: 52,221,656
Total 13F shares: 45,034,445
Share change: -619,333
Total reported value: $10,334,233,469
Put/Call ratio: 46%
Price per share: $229.66
Number of holders: 469
Value change: -$154,653,705
Number of buys: 229
Number of sells: 222

Quarterly Holders Quick Answers

What is CUSIP 574795100?
CUSIP 574795100 identifies MASI - MASIMO CORP - Common Stock in SEC institutional holdings data.

Need full ownership history?
Open the full security ownership history page.

Related Filing Research

Latest 13F filings for newly reported positions.
Latest Schedule 13D/13G reports for ownership changes outside 13F cadence.
Latest 10-Q/10-K reports for financial context tied to this issuer.
Recent insider transactions for executive and insider activity.
SEC investors directory and top value investors for manager drilldown.
Back to full security ownership history.

Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q2 2021
Previous quarter: Q4 2020

Recent filing periods for CUSIP 574795100:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of MASI - MASIMO CORP - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
BlackRock Finance, Inc.	13F	Company	16%	8,316,524	$2,231,987,000	—	31 Dec 2020	13F
VANGUARD GROUP INC	13F	Company	8.8%	4,600,906	$1,234,791,000	—	31 Dec 2020	13F
FMR LLC	13F	Company	7.3%	3,827,971	$1,027,350,000	—	31 Dec 2020	13F
Ownership Capital B.V.	13F	Company	3.3%	1,733,989	$465,368,000	—	31 Dec 2020	13F
STATE STREET CORP	13F	Company	3.2%	1,667,049	$447,403,000	—	31 Dec 2020	13F
Invesco Ltd.	13F	Company	2.9%	1,493,400	$400,799,000	—	31 Dec 2020	13F
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	13F	Company	1.9%	1,002,772	$269,123,000	—	31 Dec 2020	13F
Bank of New York Mellon Corp	13F	Company	1.6%	847,210	$227,373,000	—	31 Dec 2020	13F
Champlain Investment Partners, LLC	13F	Company	1.6%	837,302	$224,715,000	—	31 Dec 2020	13F
CREDIT SUISSE AG/	13F	Company	1.5%	769,881	$206,620,000	—	31 Dec 2020	13F
AMERIPRISE FINANCIAL INC	13F	Company	1.3%	669,387	$179,652,000	—	31 Dec 2020	13F
Neuberger Berman Group LLC	13F	Company	1.3%	665,271	$178,327,000	—	31 Dec 2020	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.1%	582,458	$156,115,000	—	31 Dec 2020	13F
GENEVA CAPITAL MANAGEMENT LLC	13F	Company	1%	541,288	$145,271,000	—	31 Dec 2020	13F
VICTORY CAPITAL MANAGEMENT INC	13F	Company	0.99%	519,029	$139,297,000	—	31 Dec 2020	13F
WADDELL & REED FINANCIAL INC	13F	Company	0.97%	507,823	$136,290,000	—	31 Dec 2020	13F
NORTHERN TRUST CORP	13F	Company	0.96%	501,564	$134,609,000	—	31 Dec 2020	13F
MARTIN CURRIE LTD	13F	Company	0.93%	487,870	$130,935,000	—	31 Dec 2020	13F
RTW INVESTMENTS, LP	13F	Company	0.9%	469,416	$125,982,000	—	31 Dec 2020	13F
NORGES BANK	13F	Company	0.87%	451,941	$121,292,000	—	31 Dec 2020	13F
Legal & General Group Plc	13F	Company	0.85%	445,830	$119,652,000	—	31 Dec 2020	13F
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	13F	Company	0.84%	439,444	$117,938,000	—	31 Dec 2020	13F
EAGLE ASSET MANAGEMENT INC	13F	Company	0.84%	439,204	$117,873,000	—	31 Dec 2020	13F
Fundsmith LLP	13F	Company	0.82%	429,254	$115,203,000	—	31 Dec 2020	13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F	Company	0.8%	415,783	$111,588,000	—	31 Dec 2020	13F
VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P.	13F	Company	0.76%	399,485	$107,215,000	—	31 Dec 2020	13F
BNP Paribas Asset Management Holding S.A.	13F	Company	0.76%	397,426	$106,661,000	—	31 Dec 2020	13F
CARILLON TOWER ADVISERS, INC.	13F	Company	0.7%	366,239	$98,292,000	—	31 Dec 2020	13F
RAYMOND JAMES & ASSOCIATES	13F	Company	0.58%	305,140	$81,894,000	—	31 Dec 2020	13F
WELLINGTON MANAGEMENT GROUP LLP	13F	Company	0.57%	298,639	$80,149,000	—	31 Dec 2020	13F
CITIGROUP INC	13F	Company	0.57%	297,545	$79,856,000	—	31 Dec 2020	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.53%	274,250	$73,604,000	—	31 Dec 2020	13F
FAYEZ SAROFIM & CO	13F	Company	0.52%	269,147	$72,234,000	—	31 Dec 2020	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	0.5%	261,838	$70,272,081	—	31 Dec 2020	13F
J.P. Morgan Private Wealth Advisors LLC	13F	Company	0.48%	249,936	$67,078,000	—	31 Dec 2020	13F
UBS Group AG	13F	Company	0.47%	246,300	$66,101,000	—	31 Dec 2020	13F
WESTFIELD CAPITAL MANAGEMENT CO LP	13F	Company	0.45%	237,443	$63,725,000	—	31 Dec 2020	13F
Swiss National Bank	13F	Company	0.45%	233,289	$62,610,000	—	31 Dec 2020	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.44%	230,448	$61,847,000	—	31 Dec 2020	13F
APG Asset Management N.V.	13F	Company	0.53%	276,150	$60,572,000	—	31 Dec 2020	13F
Nuveen Asset Management, LLC	13F	Company	0.41%	213,530	$57,307,000	—	31 Dec 2020	13F
Ensemble Capital Management, LLC	13F	Company	0.39%	203,652	$54,656,000	—	31 Dec 2020	13F
FRED ALGER MANAGEMENT, LLC	13F	Company	0.39%	201,344	$54,037,000	—	31 Dec 2020	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.38%	200,976	$53,939,000	—	31 Dec 2020	13F
SCHRODER INVESTMENT MANAGEMENT GROUP	13F	Company	0.38%	198,851	$53,368,000	—	31 Dec 2020	13F
TD ASSET MANAGEMENT INC	13F	Company	0.37%	193,966	$52,057,000	—	31 Dec 2020	13F
MORGAN STANLEY	13F	Company	0.37%	192,212	$51,587,000	—	31 Dec 2020	13F
Obermeyer Wealth Partners	13F	Company	0.36%	190,087	$51,016,000	—	31 Dec 2020	13F
Epoch Investment Partners, Inc.	13F	Company	0.36%	190,003	$50,993,000	—	31 Dec 2020	13F
Sumitomo Mitsui Trust Group, Inc.	13F	Company	0.36%	187,492	$50,319,000	—	31 Dec 2020	13F

Institutional Holders of MASIMO CORP - Common Stock (MASI) as of Q1 2021

As of 31 Mar 2021, MASIMO CORP - Common Stock (MASI) was held by 469 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 45,034,445 shares. The largest 10 holders included BlackRock Inc., VANGUARD GROUP INC, FMR LLC, Ownership Capital B.V., STATE STREET CORP, Invesco Ltd., MASSACHUSETTS FINANCIAL SERVICES CO /MA/, Champlain Investment Partners, LLC, CREDIT SUISSE AG/, and Bank of New York Mellon Corp. This page lists 470 institutional shareholders reporting positions in this security for the Q1 2021 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q1 2021 vs Q4 2020 Across Filers

Q4 2020 holders

480

Q1 2021 holders

469

Holder diff

-11

Investor	Q4 2020 Shares	Q1 2021 Shares	Share Diff	Share Chg %	Q4 2020 Value $	Q1 2021 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.