MASI Insider Trading

Insider Trading Chart
Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 9.70%

Insider Buying (Last 12 Months): $452,975.00

Insider Selling (Last 12 Months): $6,998,564.89

Masimo Insider Trading History Chart

Masimo Share Price & Price History

^$142.26

▲ +4.17 (3.02%)

As of 12/4/2025 05:00 PM ET

Days: 30 | 90 | 365

Masimo Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
8/12/2025	Michelle Brennan	Chairman	Buy	100	$150.35	$15,035.00	7,218
8/11/2025	William R Jellison	Director	Buy	3,000	$145.98	$437,940.00	4,790
5/12/2025	Bilal Muhsin	COO	Sell	10,000	$163.28	$1,632,800.00	24,172
3/14/2025	Craig B. Reynolds	Director	Sell	2,053	$166.13	$341,064.89	16,581
3/10/2025	Bilal Muhsin	COO	Sell	30,000	$167.49	$5,024,700.00	24,172
4/26/2024	Craig B. Reynolds	Director	Sell	40,000	$136.17	$5,446,800.00	7,406
5/25/2023	Joe E Kiani	CEO	Buy	6,365	$157.16	$1,000,323.40	366,055
12/15/2022	Joe E Kiani	CEO	Buy	7,040	$144.79	$1,019,321.60	46,818

SEC Filings (Institutional Ownership Changes) for Masimo (NASDAQ:MASI)

85.96% of Masimo stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

Masimo Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
12/2/2025	Allworth Financial LP	905	$0.13M	0.0%	+133.9%	0.002%
12/2/2025	Swiss Life Asset Management Ltd	2,173	$0.32M	0.0%	+78.8%	0.004%
11/20/2025	Wilmington Savings Fund Society FSB	8,899	$1.31M	0.0%	-10.6%	0.017%
11/19/2025	Coldstream Capital Management Inc.	2,668	$0.39M	0.0%	+17.2%	0.005%
11/19/2025	Danske Bank A S	400	$59K	0.0%	N/A	0.001%
11/18/2025	Advisory Services Network LLC	315	$46K	0.0%	N/A	0.001%
11/17/2025	CANADA LIFE ASSURANCE Co	27,120	$3.87M	0.0%	+3.8%	0.050%
11/17/2025	Dark Forest Capital Management LP	10,009	$1.48M	0.0%	N/A	0.019%
11/17/2025	PharVision Advisers LLC	3,909	$0.58M	0.3%	N/A	0.007%
11/17/2025	Alyeska Investment Group L.P.	1,381,085	$203.78M	0.6%	+21.7%	2.571%
11/17/2025	Verition Fund Management LLC	9,403	$1.39M	0.0%	-48.7%	0.018%
11/17/2025	Tidal Investments LLC	132,557	$19.56M	0.0%	+24.8%	0.247%
11/17/2025	Sherbrooke Park Advisers LLC	5,905	$0.87M	0.4%	N/A	0.011%
11/17/2025	Politan Capital Management LP	4,589,648	$677.20M	61.5%	-2.7%	8.545%
11/17/2025	Polymer Capital Management US LLC	5,876	$0.87M	0.1%	N/A	0.011%
11/17/2025	Quarry LP	649	$96K	0.0%	N/A	0.001%
11/17/2025	Northern Trust Corp	392,142	$57.86M	0.0%	+0.9%	0.730%
11/17/2025	Millennium Management LLC	16,131	$2.38M	0.0%	+312.9%	0.030%
11/17/2025	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	12,859	$1.90M	0.0%	+16.2%	0.024%
11/17/2025	Gotham Asset Management LLC	129,026	$19.04M	0.1%	-22.0%	0.240%
11/17/2025	Brevan Howard Capital Management LP	2,893	$0.43M	0.0%	-17.0%	0.005%
11/17/2025	Bamco Inc. NY	388,747	$57.36M	0.2%	+1.1%	0.724%
11/17/2025	California Public Employees Retirement System	78,460	$11.58M	0.0%	+7.8%	0.146%
11/17/2025	Bank of America Corp DE	405,061	$59.77M	0.0%	+113.0%	0.754%
11/17/2025	Alliancebernstein L.P.	53,561	$7.90M	0.0%	-93.7%	0.100%
11/17/2025	Ameriprise Financial Inc.	460,951	$68.01M	0.0%	+16.8%	0.858%
11/14/2025	Schonfeld Strategic Advisors LLC	10,884	$1.61M	0.0%	-23.6%	0.020%
11/14/2025	Creative Planning	11,034	$1.63M	0.0%	-1.2%	0.021%
11/14/2025	Viking Global Investors LP	1,073,433	$158.39M	0.4%	+39.9%	1.998%
11/14/2025	Durable Capital Partners LP	620,619	$91.57M	0.7%	-46.7%	1.155%
11/14/2025	Raymond James Financial Inc.	196,021	$28.92M	0.0%	-2.1%	0.365%
11/14/2025	Bellevue Group AG	96,968	$14.31M	0.3%	+8.1%	0.181%
11/14/2025	Amundi	84,894	$12.58M	0.0%	+104.2%	0.158%
11/14/2025	Occudo Quantitative Strategies LP	5,148	$0.76M	0.1%	+143.4%	0.010%
11/14/2025	Logan Capital Management Inc.	25,105	$3.70M	0.2%	-19.9%	0.047%
11/14/2025	ADAR1 Capital Management LLC	15,000	$2.21M	0.2%	N/A	0.028%
11/14/2025	Zurcher Kantonalbank Zurich Cantonalbank	9,190	$1.36M	0.0%	+3.8%	0.017%
11/14/2025	DF Dent & Co. Inc.	108,653	$16.03M	0.2%	N/A	0.202%
11/14/2025	Fiduciary Trust Co	2,035	$0.30M	0.0%	N/A	0.004%
11/14/2025	UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC	109,110	$16.10M	0.0%	-47.9%	0.203%
11/14/2025	Squarepoint Ops LLC	620,932	$91.62M	0.1%	+738.8%	1.156%
11/14/2025	iSAM Funds UK Ltd	699	$0.10M	0.0%	N/A	0.001%
11/14/2025	Comerica Bank	233,427	$34.44M	0.1%	+23.0%	0.435%
11/14/2025	Onex Canada Asset Management Inc.	27,923	$4.12M	0.5%	+239.5%	0.052%
11/14/2025	Alpha Wave Global LP	97,102	$14.33M	1.5%	-4.9%	0.181%
11/14/2025	FORA Capital LLC	3,622	$0.53M	0.1%	N/A	0.007%
11/13/2025	Marshall Wace LLP	134,122	$19.79M	0.0%	+1,760.7%	0.250%
11/13/2025	Entropy Technologies LP	16,809	$2.48M	0.2%	+110.1%	0.031%
11/13/2025	Landscape Capital Management L.L.C.	15,292	$2.26M	0.1%	+117.6%	0.028%
11/13/2025	Quantitative Investment Management LLC	12,025	$1.77M	0.2%	N/A	0.022%
11/13/2025	Invesco Ltd.	321,363	$47.42M	0.0%	+35.4%	0.598%
11/13/2025	Sei Investments Co.	21,655	$3.20M	0.0%	-29.0%	0.040%
11/13/2025	UBS Group AG	169,800	$25.05M	0.0%	+19.4%	0.316%
11/13/2025	Capital Fund Management S.A.	34,424	$5.08M	0.0%	N/A	0.064%
11/13/2025	BNP Paribas Financial Markets	14,507	$2.14M	0.0%	+223.6%	0.027%
11/13/2025	Franklin Resources Inc.	4,696	$0.69M	0.0%	-4.2%	0.009%
11/13/2025	Quadrant Capital Group LLC	4,881	$0.72M	0.0%	-2.0%	0.009%
11/13/2025	Capital Research Global Investors	1,854,128	$273.58M	0.1%	-0.1%	3.452%
11/13/2025	Legal & General Group Plc	102,677	$15.15M	0.0%	-1.6%	0.191%
11/13/2025	Fieldview Capital Management LLC	6,812	$1.01M	0.2%	N/A	0.013%
11/13/2025	Swiss National Bank	89,300	$13.18M	0.0%	+1.8%	0.166%
11/13/2025	Russell Investments Group Ltd.	4,889	$0.72M	0.0%	-55.3%	0.009%
11/13/2025	Schroder Investment Management Group	336,650	$48.12M	0.0%	-24.9%	0.627%
11/13/2025	Grantham Mayo Van Otterloo & Co. LLC	242,822	$35.83M	0.1%	+0.9%	0.452%
11/13/2025	First Trust Advisors LP	61,934	$9.14M	0.0%	-37.8%	0.115%
11/12/2025	Gamco Investors INC. ET AL	83,800	$12.37M	0.1%	-0.8%	0.156%
11/12/2025	Cramer Rosenthal Mcglynn LLC	114,605	$16.91M	1.1%	+20.7%	0.213%
11/12/2025	Barclays PLC	77,804	$11.48M	0.0%	+38.7%	0.145%
11/12/2025	Crossmark Global Holdings Inc.	2,640	$0.39M	0.0%	-10.8%	0.005%
11/12/2025	GW&K Investment Management LLC	124,047	$18.30M	0.2%	+91,786.7%	0.231%
11/12/2025	Dimensional Fund Advisors LP	259,668	$38.30M	0.0%	-50.4%	0.483%
11/12/2025	Picton Mahoney Asset Management	11,970	$1.77M	0.0%	-73.1%	0.022%
11/12/2025	South Dakota Investment Council	23,068	$3.40M	0.1%	-6.9%	0.043%
11/12/2025	Victory Capital Management Inc.	33,045	$4.88M	0.0%	+12.5%	0.062%
11/12/2025	CI Investments Inc.	419	$62K	0.0%	-40.2%	0.001%
11/12/2025	111 Capital	1,666	$0.25M	0.0%	N/A	0.003%
11/12/2025	American Century Companies Inc.	168,341	$24.84M	0.0%	+10.6%	0.313%
11/12/2025	Erste Asset Management GmbH	160,000	$22.87M	0.2%	+73.9%	0.298%
11/12/2025	Xponance Inc.	9,430	$1.39M	0.0%	+2.4%	0.018%
11/12/2025	Mitsubishi UFJ Asset Management Co. Ltd.	4,152	$0.61M	0.0%	-3.9%	0.008%
11/12/2025	Westfield Capital Management Co. LP	1,419,250	$209.41M	0.9%	+20.2%	2.642%
11/12/2025	Intech Investment Management LLC	29,690	$4.38M	0.0%	-6.5%	0.055%
11/12/2025	US Bancorp DE	3,764	$0.56M	0.0%	-9.7%	0.007%
11/10/2025	TD Asset Management Inc	107,858	$15.91M	0.0%	-35.5%	0.201%
11/10/2025	Clearstead Advisors LLC	470	$69K	0.0%	+18.4%	0.001%
11/10/2025	Ameritas Investment Partners Inc.	8,656	$1.28M	0.0%	-1.0%	0.016%
11/10/2025	Vestmark Advisory Solutions Inc.	3,209	$0.47M	0.0%	-24.5%	0.006%
11/10/2025	Citigroup Inc.	116,672	$17.22M	0.0%	+133.5%	0.217%
11/10/2025	Jupiter Asset Management Ltd.	84,657	$12.49M	0.1%	N/A	0.158%
11/7/2025	Syon Capital LLC	1,550	$0.23M	0.0%	-29.4%	0.003%
11/7/2025	NEOS Investment Management LLC	4,482	$0.66M	0.0%	+13.5%	0.008%
11/7/2025	Vanguard Group Inc.	4,810,011	$709.72M	0.0%	+3.7%	8.854%
11/7/2025	Northwestern Mutual Investment Management Company LLC	10,293	$1.52M	0.0%	+2.4%	0.019%
11/7/2025	JPMorgan Chase & Co.	107,941	$15.93M	0.0%	-21.8%	0.199%
11/7/2025	State of New Jersey Common Pension Fund D	16,652	$2.46M	0.0%	+4.9%	0.031%
11/7/2025	PNC Financial Services Group Inc.	7,252	$1.07M	0.0%	+13.3%	0.013%
11/6/2025	Assetmark Inc.	1,753	$0.26M	0.0%	+13.9%	0.003%
11/6/2025	Illinois Municipal Retirement Fund	15,565	$2.30M	0.0%	+25.3%	0.029%
11/6/2025	Caprock Group LLC	4,244	$0.59M	0.0%	N/A	0.008%
11/6/2025	ING Groep NV	20,800	$3.07M	0.0%	N/A	0.038%

Data available starting January 2016

Masimo Corporation develops, manufactures, and markets various patient monitoring technologies, and automation and connectivity solutions worldwide. The company offers masimo signal extraction technology (SET) pulse oximetry with measure-through motion and low perfusion pulse oximetry monitoring to address the primary limitations of conventional pulse oximetry; Masimo rainbow SET platform, including rainbow SET Pulse CO-Oximetry products that allows noninvasive monitoring of carboxyhemoglobin, methemoglobin, hemoglobin concentration, fractional arterial oxygen saturation, oxygen content, pleth variability index, rainbow pleth variability index, respiration rate from the pleth, and oxygen reserve index, as well as acoustic respiration monitoring, SedLine brain function monitoring, NomoLine capnography and gas monitoring, and regional oximetry. It also provides brain function and hemodynamic monitoring solutions; patient position and activity tracking, and neuromodulation technology solutions; and Masimo Hospital Automation platform, including hospital automation solutions, including Patient SafetyNet, Patient SafetyNet Surveillance, SafetyNet, Replica, Iris, MyView, UniView, Uniview: 60, Masimo Sleep, Centroid, and Bridg; and nasal high-flow ventilation, neuromodulation therapeutics, and telehealth solutions. In addition, the company provides its products through direct sales force, distributors, and original equipment manufacturers partners to hospitals, emergency medical service and home care providers, long-term care facilities, physician offices, veterinarians, and consumers; and home wellness products through e-commerce internet sites, such as masimopersonalhealth.com, amazon.com, and shopify.com. Masimo Corporation was incorporated in 1989 and is headquartered in Irvine, California.

Today's Range

Now: $142.26

$135.29

$142.29

50 Day Range

MA: $145.85

$138.09

$153.72

52 Week Range

Now: $142.26

$133.70

$194.88

Volume

1,043,827 shs

Average Volume

710,961 shs

Market Capitalization

$7.64 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.26

Who are the company insiders with the largest holdings of Masimo?: Masimo's top insider shareholders include:
Bilal Muhsin (COO)
Craig B Reynolds (Director)
Michelle Brennan (Chairman)
William R Jellison (Director)
Learn More about top insider investors at Masimo.
Who are the major institutional investors of Masimo?: Masimo's top institutional investors include:
Vanguard Group Inc. — 8.85%
Politan Capital Management LP — 8.54%
Massachusetts Financial Services Co. MA — 4.82%
Capital Research Global Investors — 3.45%
Westfield Capital Management Co. LP — 2.64%
Alyeska Investment Group L.P. — 2.57%
Learn More about top institutional investors of Masimo stock.
Which major investors are selling Masimo stock?: During the last quarter, MASI stock was sold by these institutional investors:
Alliancebernstein L.P.
Durable Capital Partners LP
Dimensional Fund Advisors LP
Politan Capital Management LP
Schroder Investment Management Group
UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC
Great Lakes Advisors LLC
Sumitomo Mitsui Trust Group Inc.
Within the last year, company insiders that have sold Masimo company stock include:
Bilal Muhsin (COO)
Craig B Reynolds (Director)
Learn More investors selling Masimo stock.
Which major investors are buying Masimo stock?: In the previous quarter, MASI stock was acquired by institutional investors including:
Squarepoint Ops LLC
Viking Global Investors LP
Alyeska Investment Group L.P.
Westfield Capital Management Co. LP
Bank of America Corp DE
Vanguard Group Inc.
Massachusetts Financial Services Co. MA
Marshall Wace LLP
Within the previous year, these company insiders have bought Masimo stock:
Bilal Muhsin (COO)
Craig B Reynolds (Director)
Learn More investors buying Masimo stock.