Michelle  Brennan net worth and biography

Michelle Brennan Biography and Net Worth

Chairman of Masimo

Ms. Brennan has served as a member of our Board since June 2023 and served as our interim CEO from September 2024 to February 12, 2025. She currently serves as the Chairman of our Board. Ms. Brennan currently serves on the boards of Cardinal Health, Inc. and Perosphere Technologies, Inc., where she sits on the Audit Committee and the Human Resources & Compensation Committee. Before her retirement, Ms. Brennan was Global Value Creation Leader of Johnson & Johnson, a researcher, developer, and manufacturer in the healthcare and consumer packaged goods fields, from 2019 to 2020. Ms. Brennan served as a senior executive at Johnson & Johnson for more than 30 years, where she oversaw medical device businesses globally as well as consumer pharmaceutical businesses. At Johnson & Johnson, Ms. Brennan successfully scaled multiple businesses to achieve market-leading growth and led efforts to invest in innovation that resulted in successful new product launches. Her previous role was Company Group Chairman of the Medical Device business for Europe, Middle East and Africa.

What is Michelle Brennan's net worth?

The estimated net worth of Michelle Brennan is at least $1.03 million as of August 12th, 2025. Ms. Brennan owns 7,218 shares of Masimo stock worth more than $1,026,833 as of December 4th. This net worth estimate does not reflect any other assets that Ms. Brennan may own. Learn More about Michelle Brennan's net worth.

How do I contact Michelle Brennan?

The corporate mailing address for Ms. Brennan and other Masimo executives is 52 DISCOVERY, IRVINE CA, 92618. Masimo can also be reached via phone at (949) 297-7000 and via email at [email protected]. Learn More on Michelle Brennan's contact information.

Has Michelle Brennan been buying or selling shares of Masimo?

Michelle Brennan has not been actively trading shares of Masimo within the last three months. Most recently, on Tuesday, August 12th, Michelle Brennan bought 100 shares of Masimo stock. The stock was acquired at an average cost of $150.35 per share, with a total value of $15,035.00. Following the completion of the transaction, the chairman now directly owns 7,218 shares of the company's stock, valued at $1,085,226.30. Learn More on Michelle Brennan's trading history.

Who are Masimo's active insiders?

Masimo's insider roster includes Michelle Brennan (Chairman), H. Cohen (Director), Jon Coleman (Insider), Joe Kiani (Founder, CEO & Chairman), Tao Levy (EVP), Thomas McClenahan (EVP), Adam Mikkelson (Director), Bilal Muhsin (COO), Craig Reynolds (Director), Anand Sampath (EVP), and Micah Young (CFO). Learn More on Masimo's active insiders.

Are insiders buying or selling shares of Masimo?

During the last twelve months, Masimo insiders bought shares 2 times. They purchased a total of 3,100 shares worth more than $452,975.00. During the last twelve months, insiders at the medical equipment provider sold shares 3 times. They sold a total of 42,053 shares worth more than $6,998,564.89. The most recent insider tranaction occured on August, 12th when Chairman Michelle Brennan bought 100 shares worth more than $15,035.00. Insiders at Masimo own 16.9% of the company. Learn More about insider trades at Masimo.

Information on this page was last updated on 8/12/2025.

Michelle Brennan Insider Trading History at Masimo

Transaction DateBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
8/12/2025Buy100$150.35$15,035.007,218View SEC Filing Icon  
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Michelle Brennan Buying and Selling Activity at Masimo

This chart shows Michelle Brennan's buying and selling at Masimo by year and by quarter.

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Masimo Company Overview

Masimo logo
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.
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Today's Range

Now: $142.26
Low: $135.29
High: $142.29

50 Day Range

MA: $145.85
Low: $138.09
High: $153.72

2 Week Range

Now: $142.26
Low: $133.70
High: $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