CRPS does not publish a stable person identifier. This page is scoped to roles for one company; same-name records at other companies are kept separate.
Sergej Feifer owns 50% of Adsum.
Source: CRPS persons in company and company shares, fetched 15 Jun 2026. Direct registry relationships only. CRPS registry ↗
The same name at other companies. CRPS publishes no person identifier, so it is not confirmed that this is the same person.