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Freedom251 › Blog › Apple

Apple Owes Masimo $184 Million in Prejudgment Interest on Apple Watch Patent Award

By Freedom251 Team · · 2 min read

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The reported extra $184 million is prejudgment interest—not a new jury verdict. Law360 reported on October 5, 2026, that a judge awarded Masimo that amount on top of the $634,313,913 patent-damages judgment entered against Apple in July. The combined amount is about $818 million, before any post-judgment interest that may accrue.

What the $184 million represents

A jury found Apple liable for patent infringement in November 2025 and returned a verdict of about $634 million. On July 20, 2026, U.S. District Judge James V. Selna entered final judgment setting damages at exactly $634,313,913. The judgment found that Apple infringed claims 11–14 of U.S. Patent No. 10,433,776, and that those claims were not invalid. It also concluded that the infringement was not willful. Read the July 20 final judgment.

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The July judgment reserved pre- and post-judgment interest for further briefing. Law360 reported on October 5, 2026, that the judge awarded Masimo $184 million in prejudgment interest. The interest is an addition to the existing damages award; it does not change the jury’s verdict or create a second verdict. Law360’s October 5 report.

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MacRumors described the combined damages and reported interest as about $818 million. That is a rounded total, not a separate court award, and it does not account for any post-judgment interest that may accrue. MacRumors coverage.

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What the July judgment did—and did not—order

The judgment resolved the specified patent claims and dismissed the remaining claims with prejudice. It denied Masimo’s requests for an injunction and attorneys’ fees. In the court’s words, Masimo had not established “either irreparable harm or that Plaintiffs lack an adequate monetary remedy.” See the judgment’s injunction ruling.

That means the district-court judgment itself did not bar Apple Watch sales. The available reporting on the later interest award does not establish its calculation method, the dates used, or the judge’s detailed reasoning. Those details should not be inferred from the $184 million figure.

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Why the separate ITC dispute matters

The district-court damages case and the Apple Watch import dispute at the U.S. International Trade Commission (ITC) are separate proceedings. They involve different asserted patents and different remedies: the district-court case produced a monetary judgment, while the ITC matter concerned import restrictions.

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Danaher, Masimo’s parent company, disclosed that in April 2026 the ITC found Apple’s second redesign did not violate the existing exclusion order. That ITC finding does not undo or decide the district-court damages judgment. Danaher’s SEC filing.

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Appeal status

Masimo’s appeal of the district-court judgment was docketed in the Federal Circuit as case 26-2126 on August 10, 2026. The docket listing surfaced for this report gave October 9, 2026, as the deadline for Masimo’s opening brief; it did not establish that the appeal had been decided. Federal Circuit docket information.

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  • KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
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  • SAFETY FEATURES—A smartwatch that puts your safety first. Series 11 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
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Key dates and amounts

Date Development
November 14, 2025 The jury returned a patent-infringement verdict of about $634 million, as described in Danaher’s SEC filing. Source
July 20, 2026 Judge Selna entered final judgment for $634,313,913 on claims 11–14 of U.S. Patent No. 10,433,776. Judgment
August 10, 2026 Masimo’s appeal was docketed in the Federal Circuit as case 26-2126. Docket information
October 5, 2026 Law360 reported a $184 million prejudgment-interest award. The actual interest order and its calculation details were not available in the reporting reviewed. Report

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

AppleApple WatchInternational Trade CommissionMasimopatent infringementprejudgment interest

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