⚠ Key-Talent and Knowledge LeakageModerate threat

A moat built on human expertise carries a human vulnerability: talent can be lured away, and knowledge can leak. Well-funded rivals and state-backed efforts — China's above all — have every incentive to recruit ASML's engineers, and each departing expert takes some irreplaceable knowledge with them. There have been documented cases of intellectual-property theft¹ and attempts to spirit ASML's know-how out of the company, and a determined national effort will keep trying to acquire through hiring and espionage what it cannot develop on its own.

The reassurance is that no single person, or even a group, holds enough of the distributed, collective mastery to reconstitute ASML elsewhere — the whole point of tacit, organization-wide knowledge is that it cannot be carried out in a few heads or a stolen file. But the risk is real and cumulative: sustained poaching and leakage over many years could, at the margin, transfer meaningful capability to a determined pursuer, and ASML must spend continuously on security, retention, and legal protection to guard a moat that partly walks around on two legs. The human core of the advantage is the deepest part of the moat and, precisely because it is human, the part most exposed to being slowly, deliberately siphoned away.