The costliest part of losing an employee is not deciding who will replace them.

When a sales director leaves for a competitor, they take more than experience. They know exactly what price will make each customer say yes.

When your head of procurement walks out, they leave knowing the supplier's real floor—not the number on the price list.

Your production director may not have memorized every formula. But they know which raw material keeps causing failures, where the line bleeds money through scrap and which small mistake can stop production.

You paid for that knowledge in wasted material, lost time and bad decisions. A competitor can put it on the payroll with one job offer.

You paid for the mistakes. Your competitor hires the lessons.

So when an employee leaves a company, who owns what they know?

The Apple–OpenAI Case

On 10 July 2026, Apple filed a trade-secret lawsuit against OpenAI, io Products and two former employees.

At the heart of the case is Tang Tan, who spent 24 years at Apple and rose to vice president responsible for iPhone and Apple Watch product design. He later joined io Products, founded by Jony Ive, and then OpenAI after it acquired the company.

Apple alleges that Tan used confidential project names during recruitment discussions, asked employees to bring certain hardware components to meetings and attempted to gather information about unreleased products. The lawsuit also alleges that Chang Liu accessed confidential documents through a system vulnerability after leaving the company.

OpenAI denies the allegations. The dispute has not yet been resolved by a court.

The case exposes where two legitimate rights collide. Apple does not own the judgment and skill an employee built over 24 years. But hiring that employee does not buy the new employer Apple's documents, designs or trade secrets.

Where Does Experience End and a Trade Secret Begin?

The dividing line is clearer than most companies pretend. Experience belongs to the person: judgment, skill and the ability to do the job. A trade secret belongs to the company only when it is non-public, commercially valuable because it is secret, and protected through real measures.

A sales executive can take their negotiating instinct, not a list of customer-specific prices and discount ceilings. A production executive can take technical competence, not formulas, drawings or test results. A procurement executive can take commercial judgment, not cost sheets or live supplier quotations.

From the management desk, the uncomfortable truth is that many companies cannot define what they are trying to protect. Stamping 'confidential' on every file—or relying on an NDA alone—does not make information secure.

What Should Be Done?

· Define what you are protecting. Explicitly classify customer pricing, product formulas, costs, technical drawings, supplier terms and strategic projects.

· Limit access according to role requirements. The first condition for calling information confidential is keeping it genuinely restricted.

· Get critical knowledge out of one person's head. Record key processes, the reasoning behind decisions, failed attempts and technical lessons. Knowledge held by one person is not company knowledge.

· Do not wait until the final day to manage a departure. Revoke access at once; review downloaded files, transfers to personal email and activity involving external storage.

· Set the rules when hiring from a competitor. Never ask a candidate for documents, pricing, formulas or project information belonging to a former employer. Ask 'What can you do here?' rather than 'What did you do there?'

· Do not make critical roles dependent on one person. Without backup and a proper handover, the loss of an employee becomes the direct loss of knowledge.

A trade secret is not something you remember after an employee leaves. It is something you protect while they still work for you.

You Cannot Call What You Hire from a Competitor 'Experience' and What Walks Out of Your Door 'Betrayal'

Job advertisements routinely ask for a 'sales leader with an existing book of business', a 'plant manager with hands-on experience producing specific products' or a 'procurement leader with deep supplier relationships'.

What are you actually buying? The candidate's ability—or the former employer's customers, pricing, production know-how and relationships?

If you expect a competitor's sales leader to arrive with a book of business, on what moral ground do you expect your own to leave theirs behind?

You cannot hire a competitor's plant manager because of what they know, then demand that your own erase their memory on the way out.

Companies maintain an ugly double standard: knowledge arriving from a competitor is 'industry experience'; the same knowledge leaving them becomes 'theft of trade secrets'. The boundary cannot move whenever your interests do.

The last question is not for the employee. It is for the executives doing the hiring:

Are you really hiring a good executive—or buying, for the price of a salary, the knowledge your competitor spent years and money building?

Sources

AP – Apple/OpenAI Lawsuit — 

https://apnews.com/article/6fff8833f5889d86406b89a02dd8fb16

Reuters – Apple/OpenAI Lawsuit — 

https://www.gmanetwork.com/news/money/companies/994537/apple-openai-employees-secrets-theft/story/

WIPO – Trade Secrets — 

https://www.wipo.int/en/web/trade-secrets

WIPO – Protecting Trade Secrets — 

https://www.wipo.int/en/web/trade-secrets/protection

WIPO – Trade Secrets and Innovation — 

https://www.wipo.int/web-publications/wipo-guide-to-trade-secrets-and-innovation/en/index.html

EU – Trade Secrets Directive —

https://eur-lex.europa.eu/eli/dir/2016/943/oj/eng/

European Parliament – Employee Experience and Skills — 

https://oeil.secure.europarl.europa.eu/oeil/en/procedure-document-summary/pdf?id=1442161

Editorial Note

The Apple–OpenAI dispute discussed in this article concerns ongoing litigation. The allegations have not yet been established by a court ruling. This article does not constitute legal advice; it offers an assessment of corporate governance and information security based on publicly available sources.