Masimo (MASI) Ownership - Who Owns Masimo?

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Masimo (MASI) Ownership Overview

9.06% Insiders

26.91% Mutual Funds

0.90% Other Institutional Investors

21.70% ETFs

41.44% Public Companies and

Individual Investors

The ownership structure of Masimo (MASI) stock is a mix of institutional, retail, and individual investors. Approximately 49.51% of the company’s stock is owned by Institutional Investors, 9.06% is owned by Insiders, and 41.44% is owned by Public Companies and Individual Investors.

The ownership structure of Masimo (MASI) stock is a mix of institutional, retail, and individual investors. Approximately 27.81% of the company’s stock is owned by Institutional Investors, 9.06% is owned by Insiders, and 21.70% is owned by Public Companies and Individual Investors.

Recent Insider Trading Activity

Date	Name	Activity	Value
Aug 14, 2025	Michelle Brennan	xxxxxxxxxxxxx	$30560
Aug 12, 2025	William Jellison	xxxxxxxxxxxxx	$437940

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Recent Hedge Fund Trading Activity

Date	Firm	Activity	Value
Dec 31, 2023	Bridgewater Associates, Lp	xxxxxxxxxxxxx	$210567
Dec 31, 2023	First Eagle Investment Management Llc	xxxxxxxxxxxxx	$3642
Dec 31, 2023	Viking Global Investors Lp	xxxxxxxxxxxxx	$66895060
Dec 31, 2023	Gamco Investors, Inc. Et Al	xxxxxxxxxxxxx	$10794980

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Top Shareholders

# of Shares	Type	% Holding	Value
4,589,648	Insider	8.77%	819,298,064
4,464,220	Institution	8.53%	796,907,912
3,951,858	Institution	7.55%	705,446,172
3,553,197	Institution	6.79%	634,281,196
1,643,450	Institution	3.14%	293,372,260
1,078,769	Institution	2.06%	192,571,054
953,179	Institution	1.82%	170,151,983
876,175	Institution	1.67%	156,405,999
667,080	Institution	1.27%	119,080,451
565,540	Institution	1.08%	100,954,545

Top Mutual Fund Holders

# of Shares	Type	% Holding	Value
3,553,197	Institution	6.79%	634,281,196
1,643,450	Institution	3.14%	293,372,260
1,078,769	Institution	2.06%	192,571,054
667,080	Institution	1.27%	119,080,451
565,540	Institution	1.08%	100,954,545
560,000	Institution	1.07%	99,965,600
500,000	Institution	0.95%	89,255,000
413,929	Institution	0.79%	73,890,466
398,100	Institution	0.76%	71,064,831
326,691	Institution	0.62%	58,317,610

Top ETF Holders

Holder	# of Shares	Type	% Holding	Value
iShares Core S&P Mid-Cap ETF	1,539,563	Institution	2.94%	274,827,391
iShares S&P Mid-Cap ETF CDI	1,502,218	Institution	2.87%	261,596,243
Vanguard Total Stock Market ETF	1,452,763	Institution	2.77%	258,402,955
Vanguard Small-Cap ETF	1,054,083	Institution	2.01%	187,489,743
Vanguard Small-Cap Growth ETF	589,806	Institution	1.13%	104,908,793
Vanguard Extended Market ETF	510,534	Institution	0.97%	90,808,683
SPDR S&P Midcap 400 ETF Trust	346,745	Institution	0.66%	61,897,450
iShares Russell Mid-Cap Growth ETF	298,256	Institution	0.57%	53,241,679
SPDR Portfolio S&P 400 Mid Cap ETF	226,951	Institution	0.43%	40,513,023
iShares U.S. Medical Devices ETF	208,824	Institution	0.40%	37,277,172

FAQ

Who Owns Masimo Corp. (MASI)?

According to the latest TipRanks data, approximately 0.90% of the company's stock is held by institutional investors, 9.06% is held by insiders, and 41.44% is held by retail investors.

What percentage of Masimo Corp. (MASI) stock is held by institutional investors?

According to the latest TipRanks data, approximately 0.90% of Masimo Corp. (MASI) stock is held by institutional investors.

What percentage of Masimo Corp. (MASI) stock is held by retail investors?

According to the latest TipRanks data, approximately 41.44% of Masimo Corp. (MASI) stock is held by retail investors.

Who owns the most shares of Masimo Corp. (MASI)?

Politan Capital Management LP owns the most shares of Masimo Corp. (MASI).

What is the significance of the ownership structure for a publicly traded company?

The ownership structure can impact the company's decision making, as large institutional investors may exert influence on the company's management and can also affect the company's stock price with their buying and selling patterns.