With a few exceptions it's much easier to either poach your competitors or simply buy them outright which is why "corporate espionage" is mainly employed by nation states these days that need to catch up. It's also important to note that stealing a design isn't that useful these days since you are too far gone what would be more important especially in the semi industry is to know the characteristics of a specific design or process in order to be able to preemptively position your offerings to compete without giving up any unnecessary ground.