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 Q3 2015?

216 institutional investors reported MASI - MASIMO CORP - Common Stock for Q3 2015. Use the holders table for investor-level position and value details.

MASIMO CORP - Common Stock (MASI)

CUSIP: 574795100

Q3 2015 13F Holders as of 30 Sep 2015

Type / Class: Equity / Common Stock
Shares outstanding: 52,221,656
Total 13F shares: 40,350,761
Share change: -261,973
Total reported value: $1,555,877,307
Put/Call ratio: 68%
Price per share: $38.56
Number of holders: 216
Value change: -$10,152,670
Number of buys: 111
Number of sells: 99

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.

Next holder-history checks

These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.

Back to full security ownership history for the broader multi-quarter picture.
Latest 13F filings for newly reported positions across managers.
Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
SEC investors directory for manager drilldown.

Explore More Reporting Periods

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

Newer quarter: Q4 2015
Previous quarter: Q2 2015

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
JANUS HENDERSON INVESTORS US LLC	13F	Company	8.2%	4,259,993	$165,032,000	—	30 Jun 2015	13F
VANGUARD GROUP INC	13F	Company	6.6%	3,448,571	$133,597,000	—	30 Jun 2015	13F
BlackRock Fund Advisors	13F	Company	5.4%	2,815,204	$109,061,000	—	30 Jun 2015	13F
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	13F	Company	3.7%	1,928,422	$74,707,068	—	30 Jun 2015	13F
Camber Capital Management LP	13F	Company	3.6%	1,900,000	$73,606,000	—	30 Jun 2015	13F
Champlain Investment Partners, LLC	13F	Company	2.4%	1,263,100	$48,932,000	—	30 Jun 2015	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	2.4%	1,242,331	$48,128,000	—	30 Jun 2015	13F
BlackRock Institutional Trust Company, N.A.	13F	Company	2.2%	1,147,048	$44,437,000	—	30 Jun 2015	13F
SCHRODER INVESTMENT MANAGEMENT GROUP	13F	Company	1.9%	1,006,254	$38,791,000	—	30 Jun 2015	13F
VOYA INVESTMENT MANAGEMENT LLC	13F	Company	1.9%	998,361	$38,677,000	—	30 Jun 2015	13F
HERMES INVESTMENT MANAGEMENT LTD	13F	Company	1.7%	895,545	$34,693,000	—	30 Jun 2015	13F
WESTFIELD CAPITAL MANAGEMENT CO LP	13F	Company	1.7%	892,988	$34,594,000	—	30 Jun 2015	13F
STATE STREET CORP	13F	Company	1.6%	861,001	$33,355,000	—	30 Jun 2015	13F
FULLER & THALER ASSET MANAGEMENT, INC.	13F	Company	1.6%	819,439	$31,745,000	—	30 Jun 2015	13F
BLACKROCK ADVISORS LLC	13F	Company	1.5%	771,593	$29,891,000	—	30 Jun 2015	13F
Boston Trust Walden Corp	13F	Company	1.4%	749,049	$29,018,000	—	30 Jun 2015	13F
D. E. Shaw & Co., Inc.	13F	Company	1.3%	686,952	$26,613,000	—	30 Jun 2015	13F
Century Capital Management, LLC	13F	Company	1.1%	599,740	$23,234,000	—	30 Jun 2015	13F
BERNZOTT CAPITAL ADVISORS	13F	Company	1.1%	594,590	$23,034,000	—	30 Jun 2015	13F
NORTHERN TRUST CORP	13F	Company	1.1%	569,844	$22,076,000	—	30 Jun 2015	13F
Bank of New York Mellon Corp	13F	Company	1%	535,313	$20,739,000	—	30 Jun 2015	13F
NORGES BANK	13F	Company	0.95%	497,878	$19,288,000	—	30 Jun 2015	13F
ROYAL BANK OF CANADA	13F	Company	0.95%	494,392	$19,152,000	—	30 Jun 2015	13F
BlackRock Group LTD	13F	Company	0.93%	484,677	$18,776,000	—	30 Jun 2015	13F
AMERIPRISE FINANCIAL INC	13F	Company	0.89%	464,203	$17,983,000	—	30 Jun 2015	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.82%	427,313	$16,554,000	—	30 Jun 2015	13F
FMR LLC	13F	Company	0.77%	403,476	$15,631,000	—	30 Jun 2015	13F
MORGAN STANLEY	13F	Company	0.77%	400,150	$15,502,000	—	30 Jun 2015	13F
JANUS HENDERSON GROUP PLC	13F	Company	0.73%	378,970	$14,681,000	—	30 Jun 2015	13F
TIVERTON ASSET MANAGEMENT LLC	13F	Company	0.69%	360,200	$13,954,000	—	30 Jun 2015	13F
BNP Paribas Asset Management Holding S.A.	13F	Company	0.68%	357,645	$13,855,000	—	30 Jun 2015	13F
ROCKEFELLER FINANCIAL SERVICES INC	13F	Company	0.68%	356,714	$13,819,000	—	30 Jun 2015	13F
DEUTSCHE BANK AG\	13F	Company	0.62%	321,807	$12,465,000	—	30 Jun 2015	13F
ROYCE & ASSOCIATES LP	13F	Company	0.61%	321,000	$12,436,000	—	30 Jun 2015	13F
PRUDENTIAL FINANCIAL INC	13F	Company	0.58%	301,208	$11,669,000	—	30 Jun 2015	13F
PRINCIPAL FINANCIAL GROUP INC	13F	Company	0.57%	297,212	$11,514,000	—	30 Jun 2015	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	0.53%	274,530	$10,635,000	—	30 Jun 2015	13F
Gamma As Sector	13F	Individual	0.52%	272,623	$10,561,000	—	30 Jun 2015	13F
MANAGED ACCOUNT ADVISORS LLC	13F	Company	0.51%	267,129	$10,349,000	—	30 Jun 2015	13F
NEW AMSTERDAM PARTNERS LLC/NY	13F	Company	0.46%	242,744	$9,404,000	—	30 Jun 2015	13F
Invesco Ltd.	13F	Company	0.43%	225,089	$8,720,000	—	30 Jun 2015	13F
BlackRock Investment Management, LLC	13F	Company	0.41%	214,399	$8,306,000	—	30 Jun 2015	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.36%	188,648	$7,309,000	—	30 Jun 2015	13F
PARAMETRIC PORTFOLIO ASSOCIATES LLC	13F	Company	0.35%	180,321	$6,986,000	—	30 Jun 2015	13F
Tributary Capital Management, LLC	13F	Company	0.34%	178,324	$6,908,000	—	30 Jun 2015	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.32%	168,458	$6,526,000	—	30 Jun 2015	13F
Wilmington Savings Fund Society, FSB	13F	Company	0.31%	160,923	$6,234,000	—	30 Jun 2015	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.3%	155,600	$6,028,000	—	30 Jun 2015	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.29%	152,465	$5,906,000	—	30 Jun 2015	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.29%	151,215	$5,859,000	—	30 Jun 2015	13F

Institutional Holders of MASIMO CORP - Common Stock (MASI) as of Q3 2015

As of 30 Sep 2015, MASIMO CORP - Common Stock (MASI) was held by 216 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 40,350,761 shares. The largest 10 holders included VANGUARD GROUP INC, JANUS CAPITAL MANAGEMENT LLC, BlackRock Fund Advisors, BlackRock Institutional Trust Company, N.A., MASSACHUSETTS FINANCIAL SERVICES CO /MA/, DIMENSIONAL FUND ADVISORS LP, Champlain Investment Partners, LLC, BlackRock Advisors LLC, SCHRODER INVESTMENT MANAGEMENT GROUP, and Camber Capital Management LLC. This page lists 216 institutional shareholders reporting positions in this security for the Q3 2015 filing period.

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

Compare Q3 2015 vs Q2 2015 Across Filers

Q2 2015 holders

198

Q3 2015 holders

216

Holder diff

Investor	Q2 2015 Shares	Q3 2015 Shares	Share Diff	Share Chg %	Q2 2015 Value $	Q3 2015 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.