Bulgaria does not maintain a separate UBO register, however has it integrated the UBO data in its trade register. When searching the register, which is free, can be done without account but is in Bulgarian only, an extra menu option shows the ‘Действителни собственици’ or︀ ‘Actual owner’.
Whats often overlooked is opportunity to operate as a branch office of a︁ foreign company.
Branches normally do not disclose UBO-s.
Funnily enough some jurisdictions allow operating as︂ a branch office even when the parent entity is liquidated.