Apple must pay an extra $184M to Masimo, judge says
A federal judge ruled Apple must pay Masimo an additional $184.2M in prejudgment interest, on top of a $634M jury award for patent infringement. The ruling covers interest from January 2020, compounding annually. Apple argued against the interest, while Masimo countered. The court used Apple's expert's calculation for the final amount. Apple was also ordered to pay postjudgment interest at 4.02% on late payments. Danaher acquired Masimo for $9.9B in June.
How this was made

The 30-second read
Why it matters
The added liability increases Apple's legal expense exposure while boosting Masimo's expected cash recovery.
Market read
The judgment introduces a fresh, material cost for Apple and a cash inflow for Masimo, likely influencing their short-term stock movements.
What to watch
Potential for Apple to appeal the judgment, which could delay or reduce the payment.
Background
Apple previously faced a $634M jury award for infringing Masimo's pulse oximetry patents. The new ruling adds prejudgement interest.
Ticker impact
Federal judge ordered Apple to pay an additional $184.2M in prejudgement interest to Masimo, raising total liability to $818.5M.
downward pressure as market prices in the extra interest payment
The new judgment adds a material expense that was not previously disclosed, creating immediate downside risk.
Market effects
Legal risk considerations for other tech firms with patent disputes may be heightened.
U.S. tech sector could see modest pullback due to heightened litigation exposure.
Limited to companies involved in biosensor or wearable technology patents.
Counterpoint
The interest payment may be absorbed without significant impact if Apple’s cash flow remains strong.
Key entities
- CompanyApple
U.S. technology giant ordered to pay additional interest.
- CompanyMasimo
Medical device maker receiving the extra payment.

