__.__.1898
foundation as Athletic Club de Bilbao
05.04.1901
foundation of a football-section
__.__.1902
syndication with Bilbao Football Club as Union Vizcaya Bilbao
__.__.1903
merger with Bilbao Football Club to Athletic Club de Bilbao
__.__.1941
renaming in Atlético Club de Bilbao
__.__.1977
renaming in Athletic Club de Bilbao