David Anthony O'Byrne is a private shareholder. David Anthony O'Byrne holds a stake in 1 company.

Companies David Anthony O'Byrne owns

Company	Stake	Value (est.)
EUROPEAN TOURING ROUTE AS	14.8%	–

Source: Biztrac.no · Data from the Brønnøysund Register Centre and the Norwegian Tax Administration · Last updated 02.09.2026.