What are the key facts and arguments in the trade-secret lawsuit filed by Apple against OpenAI and former Apple employees Tang Tan and Chang Liu—including Apple’s allegations that the defendants misappropriated confidential information about hardware design, manufacturing, and su

Apple’s July 2026 lawsuit alleges that OpenAI, its hardware unit io Products, and former Apple executives Tang Tan and Chang Liu took Apple trade secrets to accelerate OpenAI’s consumer-hardware effort. OpenAI denies that any Apple secret was stolen and frames the case as an anticompetitive response to a newly serious hardware rival and to employee mobility. The allegations remain unproven. 21

• Apple’s case: Apple says Tan and Liu improperly retained or accessed confidential material involving product and hardware design, manufacturing processes, supplier and supply-chain operations, and other nonpublic Apple know-how, for the benefit of OpenAI’s consumer-device initiative. Apple seeks to stop any use or disclosure of that information. 27

• The people and recruiting context: The defendants include Tang Tan, formerly a senior Apple hardware executive, and Chang Liu, a former Apple engineer, as well as OpenAI and io Products. Apple says more than 400 of its former employees now work at OpenAI, a fact that gives the dispute a broader talent-recruitment dimension beyond the two individual defendants. 27

• OpenAI’s denial and motive argument: OpenAI says Apple has not identified facts showing that trade secrets were taken, used, or received by OpenAI. It argues Apple brought the suit to impair a potential consumer-hardware competitor and to deter Apple employees from leaving, rather than to redress demonstrated theft. 18

• Employee mobility under California law: California generally favors employee movement between competing firms and broadly prohibits noncompete restraints. That principle does not permit taking or using trade secrets, however; the legal question is whether defendants crossed the line from carrying general skill and experience to misappropriating identifiable confidential information.

• Apple’s offboarding practices are part of OpenAI’s defense: OpenAI contends Apple permitted business records to be stored in employees’ personal iCloud accounts, then immediately escorted departing employees out. According to OpenAI, that combination made it difficult for employees to distinguish personal files from Apple materials or to review and return files methodically. 1

• The individual explanations: Liu has said that he accessed documents to assist former Apple colleagues, not to take trade secrets for OpenAI. Tan has said that he returned prototypes and kept only materials that were not confidential. Those are defenses to Apple’s factual allegations, not judicial findings. 1

• Competitive backdrop: The suit marks a sharp deterioration in an already strained Apple–OpenAI relationship as AI competition expands into devices and consumer hardware. Apple characterizes the case as protection of its proprietary technology; OpenAI characterizes it as an attempt to use litigation to constrain competition and recruiting. 21

• What the court must decide: The central issues will be whether Apple can identify legally protectable trade secrets with sufficient specificity; whether Tan or Liu acquired, retained, disclosed, or used them improperly; whether OpenAI or io Products knew of and benefited from any misuse; and whether Apple’s internal file-storage and offboarding practices affect those claims.