Billionaire Profile
Joe Kiani
Global Rank
#2859

Image: Public domain | via Wikimedia Commons

Joe Kiani

CEO, Masimo
US
Real-Time Net Worth
$1.2B
As of December 2025
Age
61
Source
Medical devices
Industry
healthcare
Citizenship
US

Biography

Joe Kiani is an Iranian-American engineer and entrepreneur, best known for founding Masimo Corporation in 1989, a medical technology company specializing in noninvasive patient monitoring. Kiani's source of wealth stems from his pioneering work in the medical device industry, particularly in pulse oximetry. His career includes over three decades at Masimo, where he developed groundbreaking technologies, holding over 500 patents. Kiani's achievements have earned him numerous accolades and recognition, including being named the Ernst & Young National Entrepreneur of the Year. After his departure as CEO of Masimo in 2024, Kiani has continued to be involved in healthcare innovation through Willow Laboratories and other ventures. His net worth is estimated to be $1.2 billion.

Wealth Over Time

In-Depth Profile

Early Life

Joe Kiani was born Massi Joseph E. Kiani in Shiraz, Iran, on September 16, 1964. At the age of nine, Kiani immigrated to the United States with his family. He displayed exceptional academic abilities, graduating from high school at the age of fifteen.

Education and Early Career

Kiani attended San Diego State University (SDSU), earning Bachelor of Science (B.S.E.E) and Master of Science (M.S.E.E) degrees in electrical engineering by the age of 22. During this time, he worked as a CO-OP engineer at Burroughs (later Unisys) and at Anthem Electronics.

Rise to Success at Masimo

In 1989, Kiani founded Masimo, a medical technology company. He invented measures through motion and low perfusion pulse oximetry, inventing the Masimo Signal Extraction Technology (SET). Masimo's technology has been shown to outperform other pulse oximetry technologies in numerous independent studies, and is used to monitor over 200 million patients annually. Kiani served as CEO and chairman of Masimo for over three decades.

Key Business Strategies

Masimo focused on developing and commercializing innovative noninvasive patient monitoring technologies, including pulse oximetry and other devices. The company holds over 500 patents for advanced signal processing, optical sensors, and wearable technologies. Masimo went public in 2007. In 2022, Masimo acquired Sound United, which owns speaker and headphone brands.

Philanthropy

In 2010, Kiani and Masimo provided $10 million in funding to create the Masimo Foundation for Ethics, Innovation, and Competition in Healthcare, which supports activities that improve patient safety. In 2012, Kiani founded the Patient Safety Movement Foundation. In 2020, the Patient Safety Movement Foundation was awarded a $5 million five-year grant from the Masimo Foundation.

Career Milestones

1989

Founded Masimo

Founded medical technology company Masimo.

2005

Masimo SET Launched

Masimo's SET pulse oximetry technology was launched.

2012

Founded Patient Safety Movement Foundation

Founded organization to eliminate preventable hospital deaths.

2021

Appointed to PCAST

Appointed by President Joe Biden to the President's Council of Advisors on Science and Technology (PCAST).

2024

Resigned as Masimo CEO

Resigned as CEO of Masimo after a shareholder vote.

Philanthropy & Social Impact

Healthcare

Masimo Foundation for Ethics, Innovation, and Competition in Healthcare

$10M

Funding to encourage and promote activities that improve patient safety and deliver advanced healthcare worldwide.

Healthcare

Patient Safety Movement Foundation

$5M

A $5 million five-year grant from the Masimo Foundation to help advance its mission and expedite its efforts.

Business Philosophy & Leadership

Notable Quotes

"“I wanted to be a doctor, but my grades weren't that good and chemistry was not my thing. Physics fortunately was. So I switched to engineering.”"

"“Imagine if everyone took action out of kindness…”"

Leadership Principles

Patient Safety

Dedicated to improving patient outcomes and reducing preventable deaths in hospitals.

Innovation

Committed to developing and commercializing innovative medical technologies.

Impact Capitalism

Combining capitalism with social impact to enhance the human condition and disrupt markets.

Controversies & Challenges

2024

Ousting from Masimo Board

Ousted from Masimo's board after activist shareholders won a proxy fight. Kiani also resigned as the company's CEO.

2024

Legal Disputes with Masimo

Ongoing legal disputes with Masimo, including disagreements over severance and allegations of voting manipulation.

2024

Shareholder Disputes

Dispute over share ownership following his departure from Masimo, with Kiani claiming ownership of 13.2% of shares, which is disputed by the company.