The gathering was attended by 513 delegates, of whom 371 were accorded full voting rights, representing 65 Comintern member parties as well as 19 sympathizing parties.
Pertemuan tersebut dihadiri oleh 513 delegasi, 371 diantaranya memegang hak pemberian suara penuh, mewakili 65 partai anggota Komitern serta 19 partai simpatisan.