Apple’s blockbuster lawsuit against OpenAI reads like a corporate spy thriller. In the center of it, according to Apple’s filing, are two ex-Apple employees now at OpenAI: Tang Yew Tan and Chang Liu. Apple alleges Tan and Liu pursued “a pattern of theft” of its trade secrets, and Apple is suing both for “Breach of Intellectual Property Agreement” and “Misappropriation of Trade Secrets in Violation of the Defend Trade Secrets Act,” while also suing OpenAI as a whole.

Apple’s narrative gets specific fast. Chang Liu, a senior system electrical engineer who worked at Apple for eight years before joining OpenAI’s San Francisco office in January 2026, allegedly failed to return at least one work-issued laptop and did not respond to requests related to an exit interview or confirming the return of devices. Apple further alleges Liu kept in contact with Yu-Ting “Alyssa” Peng, who was still employed at Apple, and that Peng later joined OpenAI about four months afterward. Before she left, Apple says Liu had in-depth conversations with Peng about confidential Apple projects, and that Liu helped Peng prepare for her OpenAI interview by instructing her to study specific proprietary Apple materials.

If that sounds like classic “recruiting-as-espionage,” Apple’s complaint tries to prove it with behavior and alleged access. Apple contends that after Peng left, Liu used Peng’s Apple-issued work computer to access Apple’s corporate network. The lawsuit claims Liu then exploited a “rare, previously unknown authentication bug” to break into the network on the computer he allegedly did not turn in. Apple says Liu messaged Peng, “LOL, I found out I can access the [network storage], so funny,” and that Liu downloaded “dozens” of confidential hardware-related files, including “voluminous, detailed information about unreleased products, engineering presentations, technical specifications, and proprietary project data.” One example Apple highlights: a presentation about manufacturing and testing a certain type of circuit board for Apple hardware.

Apple also alleges that when Peng left for OpenAI, Liu helped her copy files without tipping off Apple’s security team, and directed her to take specific files and data. Notably, Apple did not name Peng as a defendant in the suit. OpenAI, through Fortune, told the outlet it has “no interest in other companies' trade secrets,” and said it is still reviewing the lawsuit. OpenAI also said, “We remain focused on building innovative technology that empowers people everywhere,” and it did not offer more details beyond that.

Then comes Tang Yew Tan, the other key name in Apple’s complaint. Apple alleges Tan spent about a quarter century at Apple, including overseeing product design for the iPhone and Apple Watch, before leaving in March 2024. After that, Apple’s story suggests he targeted Apple employees during hiring at OpenAI. Fortune notes that Tan appears on LinkedIn as heading toward a stealth hardware startup, and that in July 2025 he updated his role to Chief Hardware Officer at OpenAI, the same month io, an AI hardware startup OpenAI purchased in 2025, officially merged into OpenAI. Apple’s lawsuit does not name Jony Ive, the most famous ex-Apple figure at OpenAI, but Fortune reports his involvement is implied as a co-founder of io, which Apple is suing as part of the case.

Apple’s complaint asserts Tan interviewed current Apple employees and “min[ed] them for information during the hiring process,” allegedly using tactics like intentionally using Apple project codenames to elicit detail. Apple also claims Tan asked employees to bring in CAD designs and prototypes and to divulge information on Apple suppliers. One Apple employee was surprised at the request, commenting in the case that he “didn't even know we could take those from the office.” Apple further alleges Tan coached recruits to not tell Apple they were leaving for OpenAI so they could stay at Apple as long as possible. Before Tan left, Apple says he obtained a document outlining security procedures for departing employees, and Apple believes Tan’s recruiting at OpenAI used that information to “evade security processes intended to protect Apple's confidential information.”

So where does OpenAI’s “as a company” responsibility enter? Apple’s allegations against OpenAI are framed more broadly than the specific conduct Apple attributes to Tan and Liu. Apple argues the sketchy, self-serving behavior it describes mirrors “a coordinated pattern of misconduct at an institutional level.” In Apple’s telling, “such misconduct is normalized and exemplified by leadership,” and Apple says it has evidence across “seniority levels, technical disciplines, and departments” at OpenAI. Apple also alleges OpenAI contacted its supplier base, which Apple has “painstakingly developed,” to push for similar components for OpenAI’s forthcoming AI hardware device. The lawsuit also claims Tan emailed himself supplier information before leaving, and that an unnamed OpenAI person later contacted an Apple supplier asking them to “carry out a specific trade secret metal-finishing technique for OpenAI, misleading the partner to believe they had Apple’s permission to do so.” Apple says it emailed OpenAI in February during its investigation and asked what OpenAI was doing to prevent confidential information passing between companies, and that OpenAI never responded.

This is the part executives should not treat like background noise. Apple says its filing is “the tip of the iceberg,” arguing it only has access to information on Apple-issued devices. It warns that discovery will expose misappropriation “on a scale many times greater” than the instances described. Strategically, that matters because the stakes extend beyond the courtroom. Apple has already partnered with OpenAI to embed ChatGPT in a revamped Siri voice assistant in late 2024, and that capability still exists today. But Fortune reports that partnership has deteriorated, including Apple selecting Google Gemini as its go-forward AI partner in January. Meanwhile, OpenAI is building an AI-powered device, which the company has described only lightly beyond CEO Sam Altman calling an early prototype “the coolest piece that the world will have ever seen” in May 2025, and over a year later it has not released concrete details.

Finally, there is the supply chain and hiring funnel angle, the quiet power behind almost every AI hardware push. If Apple’s supplier-contact allegations and the “CAD and prototypes” claims are taken seriously by a court, the implications for any tech company buying time through talent mobility are bigger than a single dispute. Apple also hired Weil, Gotshal & Manges, LLP, noting the firm’s involvement in complex white-collar cases like representing Enron during its collapse. OpenAI, meanwhile, has also had legal turbulence, with Fortune reporting it fended off a lawsuit from Elon Musk in May, which a jury dismissed. Put it together and this case is not just about who accessed which files. It is about whether the industry’s current playbook for AI hiring, partner integration, and hardware execution can survive scrutiny.

For boards and leadership teams, the real question is simple: if discovery expands and Apple’s “institutional pattern” framing lands, how do you prove your confidentiality boundaries work in practice, not just in policy? That question will matter for Apple, OpenAI, and any company trying to turn AI into hardware, devices, and platform experiences without turning recruiting into a liability.