Joe Kiani Net Worth

Joe Kiani has an estimated net worth of $1.3 billion, according to Forbes Real-Time Billionaires, Joe Kiani profile (figures as of October 20, 2026).

Joe Kiani is an engineer and entrepreneur best known for founding Masimo in 1989. Early in his career, he found a way to improve pulse oximeters, which measure oxygen levels in a patient’s blood without invasive steps. He studied electrical engineering in the United States and finished high school near San Diego at age 15. By age 22, he had earned a master’s degree in engineering from San Diego State University.

Masimo spent years trying to break into the United States hospital market before it became a leader in hospital pulse oximetry. That business is the main reason Kiani became wealthy. After leaving Masimo in September 2024, he moved on to new health technology work. He now serves as executive chairman of Willow Labs, which is rolling out technology focused on metabolic health, and as chairman of Like Minded Labs, which launched a virtual collaboration platform.

How Joe Kiani built his wealth

Kiani’s fortune comes from medical devices, especially the company he started in 1989. Masimo developed noninvasive tools that measure oxygen levels in blood, and Kiani’s early technical breakthrough helped improve pulse oximeter performance. After a long stretch of trying to win hospital business in the United States, Masimo became a leader in pulse oximetry for hospitals. That growth turned Kiani into a self-made billionaire in the healthcare industry, according to Forbes.

His money story is closely tied to Masimo’s long run in patient monitoring. Even after his September 2024 exit as chief executive and board member, the company remained central to his wealth picture. In February 2026, Danaher agreed to buy Masimo for nearly $10 billion, a major event connected to the value of the business he created. Kiani also leads Willow Labs and chairs Like Minded Labs, but the Masimo stake is the clearest driver of his wealth.

Forbes net worth timeline

Forbes estimated Kiani’s net worth at $1.3 billion on the World’s Billionaires List in 2023. That estimate moved down to $1.1 billion in 2024, the year he resigned from Masimo after activist shareholders won a proxy fight. Forbes then put him back at $1.3 billion on the 2025 list. The swings line up with changes around Masimo, which has long been the main source behind his billionaire status.

In 2026, Forbes placed him at $1.2 billion on the World’s Billionaires List, then at $1.3 billion on Forbes' real-time billionaires tracker as of October 20, 2026. One major business event that year was Danaher’s agreement to buy Masimo for nearly $10 billion in February 2026. Forbes still tracks Kiani as a billionaire, and the estimate shows how closely his wealth remains tied to the medical technology company he founded.