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

CUSIP 574795100 is the security identifier for MASI - MASIMO CORP - Common Stock, par value $0.001 per share used to aggregate holder disclosures.

How many institutions held MASI - MASIMO CORP - Common Stock, par value $0.001 per share in Q1 2018?

319 institutional investors reported MASI - MASIMO CORP - Common Stock, par value $0.001 per share for Q1 2018. Use the holders table for investor-level position and value details.

MASIMO CORP - Common Stock, par value $0.001 per share (MASI)

CUSIP: 574795100

Q1 2018 13F Holders as of 31 Mar 2018

Type / Class: Equity / Common Stock, par value $0.001 per share
Shares outstanding: 52,065,574
Total 13F shares: 43,588,229
Share change: +2,052,054
Total reported value: $3,833,601,534
Put/Call ratio: 80%
Price per share: $87.95
Number of holders: 319
Value change: +$188,073,886
Number of buys: 158
Number of sells: 168

Quarterly Holders Quick Answers

What is CUSIP 574795100?
CUSIP 574795100 identifies MASI - MASIMO CORP - Common Stock, par value $0.001 per share in SEC institutional holdings data.

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Explore More Reporting Periods

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

Newer quarter: Q2 2018
Previous quarter: Q4 2017

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, par value $0.001 per share (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	14%	7,247,465	$614,586,000	—	31 Dec 2017	13F
VANGUARD GROUP INC	13F	Company	9.5%	4,939,543	$418,873,000	—	31 Dec 2017	13F
STATE STREET CORP	13F	Company	3.2%	1,645,263	$139,516,000	—	31 Dec 2017	13F
COLUMBIA WANGER ASSET MANAGEMENT LLC	13F	Company	2.3%	1,213,569	$102,911,000	—	31 Dec 2017	13F
ACADIAN ASSET MANAGEMENT LLC	13F	Company	2%	1,053,682	$89,354,000	—	31 Dec 2017	13F
Bank of New York Mellon Corp	13F	Company	2%	1,037,092	$87,946,000	—	31 Dec 2017	13F
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	13F	Company	1.9%	997,073	$84,552,000	—	31 Dec 2017	13F
Robeco Institutional Asset Management B.V.	13F	Company	1.7%	907,396	$76,950,000	—	31 Dec 2017	13F
Jupiter Investment Management Ltd	13F	Company	1.7%	881,000	$74,708,000	—	31 Dec 2017	13F
JPMORGAN CHASE & CO	13F	Company	1.5%	771,460	$65,420,000	—	31 Dec 2017	13F
PRUDENTIAL FINANCIAL INC	13F	Company	1.5%	759,875	$64,438,000	—	31 Dec 2017	13F
NORTHERN TRUST CORP	13F	Company	1.4%	734,955	$62,325,000	—	31 Dec 2017	13F
Point72 Asset Management, L.P.	13F	Company	1.3%	684,025	$58,005,000	—	31 Dec 2017	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.2%	618,119	$52,416,000	—	31 Dec 2017	13F
NORGES BANK	13F	Company	1.2%	599,715	$50,856,000	—	31 Dec 2017	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	1.1%	587,070	$49,784,000	—	31 Dec 2017	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	1.1%	552,100	$46,818,000	—	31 Dec 2017	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.98%	509,580	$43,214,000	—	31 Dec 2017	13F
MORGAN STANLEY	13F	Company	0.96%	501,450	$42,523,000	—	31 Dec 2017	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	0.95%	494,409	$41,926,000	—	31 Dec 2017	13F
WESTFIELD CAPITAL MANAGEMENT CO LP	13F	Company	0.94%	488,468	$41,422,000	—	31 Dec 2017	13F
SCHRODER INVESTMENT MANAGEMENT GROUP	13F	Company	0.9%	468,020	$39,687,000	—	31 Dec 2017	13F
JANUS HENDERSON GROUP PLC	13F	Company	0.85%	443,165	$37,580,000	—	31 Dec 2017	13F
VOYA INVESTMENT MANAGEMENT LLC	13F	Company	0.8%	415,214	$35,211,000	—	31 Dec 2017	13F
VICTORY CAPITAL MANAGEMENT INC	13F	Company	0.79%	410,400	$34,802,000	—	31 Dec 2017	13F
Allianz Asset Management GmbH	13F	Company	0.77%	402,209	$34,107,000	—	31 Dec 2017	13F
CAPITAL FUND MANAGEMENT S.A.	13F	Company	0.75%	389,323	$33,015,000	—	31 Dec 2017	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.71%	371,944	$31,541,000	—	31 Dec 2017	13F
TEACHERS ADVISORS, LLC	13F	Company	0.7%	366,093	$31,045,000	—	31 Dec 2017	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.69%	361,213	$30,632,000	—	31 Dec 2017	13F
RAYMOND JAMES & ASSOCIATES	13F	Company	0.67%	350,503	$29,723,000	—	31 Dec 2017	13F
ROCKEFELLER FINANCIAL SERVICES INC	13F	Company	0.65%	339,655	$28,803,000	—	31 Dec 2017	13F
Boston Trust Walden Corp	13F	Company	0.64%	332,442	$28,191,000	—	31 Dec 2017	13F
Russell Investments Group, Ltd.	13F	Company	0.61%	315,611	$27,049,000	—	31 Dec 2017	13F
ROYAL BANK OF CANADA	13F	Company	0.58%	301,066	$25,531,000	—	31 Dec 2017	13F
AQR CAPITAL MANAGEMENT LLC	13F	Company	0.54%	281,747	$23,892,000	—	31 Dec 2017	13F
AMERIPRISE FINANCIAL INC	13F	Company	0.52%	272,863	$23,140,000	—	31 Dec 2017	13F
Marshall Wace North America L.P.	13F	Company	0.49%	254,191	$21,556,000	—	31 Dec 2017	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.48%	247,347	$20,974,000	—	31 Dec 2017	13F
DEUTSCHE BANK AG\	13F	Company	0.44%	227,863	$19,321,000	—	31 Dec 2017	13F
TWO SIGMA ADVISERS, LP	13F	Company	0.41%	214,868	$18,221,000	—	31 Dec 2017	13F
PRINCIPAL FINANCIAL GROUP INC	13F	Company	0.39%	205,008	$17,385,000	—	31 Dec 2017	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.39%	202,824	$17,199,000	—	31 Dec 2017	13F
CREDIT SUISSE AG/	13F	Company	0.38%	199,380	$16,907,000	—	31 Dec 2017	13F
Champlain Investment Partners, LLC	13F	Company	0.38%	198,600	$16,841,000	—	31 Dec 2017	13F
Numeric Investors LLC	13F	Company	0.36%	186,518	$15,817,000	—	31 Dec 2017	13F
J.P. Morgan Private Wealth Advisors LLC	13F	Company	0.35%	183,432	$15,555,000	—	31 Dec 2017	13F
PANAGORA ASSET MANAGEMENT INC	13F	Company	0.35%	179,822	$15,249,000	—	31 Dec 2017	13F
Skandinaviska Enskilda Banken AB (publ)	13F	Company	0.34%	175,500	$14,882,000	—	31 Dec 2017	13F
CORNERSTONE CAPITAL MANAGEMENT HOLDINGS LLC.	13F	Company	0.33%	169,583	$14,379,000	—	31 Dec 2017	13F

Institutional Holders of MASIMO CORP - Common Stock, par value $0.001 per share (MASI) as of Q1 2018

As of 31 Mar 2018, MASIMO CORP - Common Stock, par value $0.001 per share (MASI) was held by 319 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 43,588,229 shares. The largest 10 holders included BlackRock Inc., VANGUARD GROUP INC, AMERIPRISE FINANCIAL INC, STATE STREET CORP, Point72 Asset Management, L.P., CITADEL ADVISORS LLC, Old Mutual Global Investors (UK) Ltd., PRUDENTIAL FINANCIAL INC, Voya Investment Management LLC, and NORTHERN TRUST CORP. This page lists 319 institutional shareholders reporting positions in this security for the Q1 2018 filing period.

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

Compare Q1 2018 vs Q4 2017 Across Filers

Q4 2017 holders

333

Q1 2018 holders

319

Holder diff

-14

Investor	Q4 2017 Shares	Q1 2018 Shares	Share Diff	Share Chg %	Q4 2017 Value $	Q1 2018 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.