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 Q4 2014?

177 institutional investors reported MASI - MASIMO CORP - Common Stock for Q4 2014. Use the holders table for investor-level position and value details.

MASIMO CORP - Common Stock (MASI)

CUSIP: 574795100

Q4 2014 13F Holders as of 31 Dec 2014

Type / Class: Equity / Common Stock
Shares outstanding: 52,221,656
Total 13F shares: 42,045,270
Share change: -652,603
Total reported value: $1,107,548,336
Put/Call ratio: 20%
Price per share: $26.34
Number of holders: 177
Value change: -$9,241,122
Number of buys: 80
Number of sells: 95

Quarterly Holders Quick Answers

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

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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: Q1 2015
Previous quarter: Q3 2014

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	9.3%	4,856,647	$103,349,000	—	30 Sep 2014	13F
VANGUARD GROUP INC	13F	Company	6.1%	3,176,205	$67,590,000	—	30 Sep 2014	13F
Camber Capital Management LP	13F	Company	5.2%	2,700,000	$57,456,000	—	30 Sep 2014	13F
BlackRock Fund Advisors	13F	Company	5%	2,607,207	$55,481,000	—	30 Sep 2014	13F
Champlain Investment Partners, LLC	13F	Company	3.4%	1,794,025	$38,177,000	—	30 Sep 2014	13F
BlackRock Institutional Trust Company, N.A.	13F	Company	2.5%	1,316,390	$28,013,000	—	30 Sep 2014	13F
FULLER & THALER ASSET MANAGEMENT, INC.	13F	Company	2.3%	1,206,181	$25,668,000	—	30 Sep 2014	13F
FMR LLC	13F	Company	2.2%	1,131,755	$24,084,000	—	30 Sep 2014	13F
VOYA INVESTMENT MANAGEMENT LLC	13F	Company	2.1%	1,072,874	$22,830,000	—	30 Sep 2014	13F
WESTFIELD CAPITAL MANAGEMENT CO LP	13F	Company	1.9%	1,007,740	$21,445,000	—	30 Sep 2014	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	1.8%	964,113	$20,516,000	—	30 Sep 2014	13F
HERMES INVESTMENT MANAGEMENT LTD	13F	Company	1.8%	956,251	$20,349,000	—	30 Sep 2014	13F
STATE STREET CORP	13F	Company	1.8%	946,764	$20,148,000	—	30 Sep 2014	13F
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	13F	Company	1.8%	935,919	$19,916,000	—	30 Sep 2014	13F
SCHRODER INVESTMENT MANAGEMENT GROUP	13F	Company	1.5%	807,405	$17,181,579	—	30 Sep 2014	13F
Bank of New York Mellon Corp	13F	Company	1.5%	769,430	$16,373,000	—	30 Sep 2014	13F
AMERIPRISE FINANCIAL INC	13F	Company	1.3%	691,658	$14,718,000	—	30 Sep 2014	13F
NORGES BANK	13F	Company	1.3%	682,048	$14,514,000	—	30 Sep 2014	13F
NORTHERN TRUST CORP	13F	Company	1.2%	622,210	$13,241,000	—	30 Sep 2014	13F
BERNZOTT CAPITAL ADVISORS	13F	Company	1.2%	615,190	$13,091,000	—	30 Sep 2014	13F
ROYAL BANK OF CANADA	13F	Company	1.1%	573,811	$12,211,000	—	30 Sep 2014	13F
PRUDENTIAL FINANCIAL INC	13F	Company	0.91%	473,658	$10,080,000	—	30 Sep 2014	13F
BNP Paribas Asset Management Holding S.A.	13F	Company	0.87%	454,920	$9,681,000	—	30 Sep 2014	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.84%	438,722	$9,336,000	—	30 Sep 2014	13F
DEUTSCHE BANK AG\	13F	Company	0.74%	385,685	$8,206,000	—	30 Sep 2014	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.74%	385,401	$8,201,000	—	30 Sep 2014	13F
D. E. Shaw & Co., Inc.	13F	Company	0.69%	362,650	$7,717,000	—	30 Sep 2014	13F
TIVERTON ASSET MANAGEMENT LLC	13F	Company	0.69%	360,200	$7,665,000	—	30 Sep 2014	13F
ROCKEFELLER FINANCIAL SERVICES INC	13F	Company	0.67%	349,302	$7,433,000	—	30 Sep 2014	13F
MANAGED ACCOUNT ADVISORS LLC	13F	Company	0.66%	346,768	$7,379,000	—	30 Sep 2014	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.64%	336,200	$7,154,000	—	30 Sep 2014	13F
GENEVA CAPITAL MANAGEMENT LLC	13F	Company	0.64%	335,116	$7,131,000	—	30 Sep 2014	13F
KENNEDY CAPITAL MANAGEMENT LLC	13F	Company	0.64%	333,741	$7,102,000	—	30 Sep 2014	13F
PRINCIPAL FINANCIAL GROUP INC	13F	Company	0.59%	310,102	$6,599,000	—	30 Sep 2014	13F
Foundation Asset Management, LP	13F	Company	0.59%	305,800	$6,507,000	—	30 Sep 2014	13F
HIGHBRIDGE CAPITAL MANAGEMENT LLC	13F	Company	0.56%	293,011	$6,236,000	—	30 Sep 2014	13F
BLACKROCK ADVISORS LLC	13F	Company	0.54%	281,495	$5,990,000	—	30 Sep 2014	13F
JPMORGAN CHASE & CO	13F	Company	0.54%	281,425	$5,989,000	—	30 Sep 2014	13F
CITADEL ADVISORS LLC	13F	Company	0.52%	272,452	$5,798,000	—	30 Sep 2014	13F
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F	Company	0.48%	250,000	$5,320,000	—	30 Sep 2014	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	0.47%	246,330	$5,242,000	—	30 Sep 2014	13F
PARADIGM CAPITAL MANAGEMENT INC/NY	13F	Company	0.47%	245,270	$5,219,000	—	30 Sep 2014	13F
MORGAN STANLEY	13F	Company	0.46%	241,282	$5,135,000	—	30 Sep 2014	13F
DAVIDSON INVESTMENT ADVISORS	13F	Company	0.35%	185,320	$4,450,000	—	30 Sep 2014	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.38%	196,938	$4,191,000	—	30 Sep 2014	13F
MARSHALL WACE, LLP	13F	Company	0.37%	193,110	$4,109,000	—	30 Sep 2014	13F
Kerrisdale Advisers, LLC	13F	Company	0.35%	184,106	$3,918,000	—	30 Sep 2014	13F
BlackRock Group LTD	13F	Company	0.35%	181,599	$3,865,000	—	30 Sep 2014	13F
BlackRock Investment Management, LLC	13F	Company	0.34%	176,690	$3,760,000	—	30 Sep 2014	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.32%	165,946	$3,532,000	—	30 Sep 2014	13F

Institutional Holders of MASIMO CORP - Common Stock (MASI) as of Q4 2014

As of 31 Dec 2014, MASIMO CORP - Common Stock (MASI) was held by 177 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 42,045,270 shares. The largest 10 holders included JANUS CAPITAL MANAGEMENT LLC, VANGUARD GROUP INC, Camber Capital Management LLC, BlackRock Fund Advisors, MASSACHUSETTS FINANCIAL SERVICES CO /MA/, Champlain Investment Partners, LLC, FULLER & THALER ASSET MANAGEMENT, INC., BlackRock Institutional Trust Company, N.A., Voya Investment Management LLC, and DIMENSIONAL FUND ADVISORS LP. This page lists 177 institutional shareholders reporting positions in this security for the Q4 2014 filing period.

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

Compare Q4 2014 vs Q3 2014 Across Filers

Q3 2014 holders

166

Q4 2014 holders

177

Holder diff

Investor	Q3 2014 Shares	Q4 2014 Shares	Share Diff	Share Chg %	Q3 2014 Value $	Q4 2014 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.