The Ninth Circuit reversed the district court’s judgment and remanded the case for a new trial on liability and damages regarding trade secrets D, E, and L. The court held that the district court committed reversible error by instructing the jury that the defendant, XP Power, bore the burden of proving that the alleged trade secrets were “readily ascertainable by proper means.” Under the Defend Trade Secrets Act (DTSA), 18 U.S.C. § 1839(3)(B), the burden of proof on this essential element rests with the plaintiff to show that the information was not readily ascertainable. The court determined that XP did not invite this error because it made a timely and correct objection when the plaintiff dropped its state law claims, which had previously supported the erroneous instruction. Furthermore, the court found the error was not harmless because the jury instructions were not accurate as a whole, and there was conflicting expert testimony regarding whether the secrets could be reverse-engineered or derived from public sources, making it impossible to determine if the verdict would have differed under a proper burden of proof. The practical consequence is that the $40 million damages award, the permanent injunction, and the attorney fees are vacated. The case returns to the district court for a new trial where the jury must be correctly instructed on the plaintiff’s burden to prove lack of ready ascertainability. While the judgment as a matter of law in favor of XP regarding Trade Secret T and the jury’s finding that Trade Secret S was not misappropriated remain undisturbed, the parties will retry the issues of liability and damages for Trade Secrets D, E, and L.