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Apple must pay Masimo an extra $184M for Apple Watch patent infringement

9to5Mac • October 6, 2026 • technology

Key Points:

Apple was found to have infringed a Masimo patent related to low-power pulse oximeter technology used in the Apple Watch and was initially ordered to pay $634 million in damages.
A federal judge has now ordered Apple to pay an additional $184 million in interest on the damages, rejecting Apple's argument that this would be a windfall for Masimo.
The judge ruled that the interest rate should match Masimo's borrowing rate rather than the 7% requested by Masimo, but annual compounding still significantly increased the total amount owed.
Previously, Apple was also required to redesign the blood oxygen feature in two Apple Watch models following an International Trade Commission ruling to allow their sale in the US.