Following Croatia's EU accession, at the first elections to the European Parliament in Croatia in April 2013, Stier won 14 005 votes on the list of the HDZ coalitios that were still made by HSP AS and BUZ.
Na prvim izborima za Europski parlament u Hrvatskoj održanim u travnju 2013. godine, Stier je dobio 14 005 glasova na listi HDZ-ove koalicije koju su činili još HSP AS i BUZ.