Social Democratic Party of Austria - Sozialdemokratische Partei Österreichs
Acronym: SPÖ
Parti Socialiste
Acronym: PS Belgium
Vooruit
Bulgarska Sotsialisticheska Partiya - Bulgarian Socialist Party
Acronym: BSP
Social Democratic Party - Socijaldemokratska Partija Hrvatske
Acronym: SDP Croatia
Democratic Party - Dimokratiko Komma
Acronym: DIKO
Movement of Socialists - Kinima Sosialdimokraton
Acronym: EDEK
Socialdemokratiet - Danish Social Democratic Party
Acronym: SD
Sotsiaaldemokraatlik Erakond - Estonian Social Democratic Party
Acronym: SDE
Social Democratic Party of Finland - Suomen Sosialidemokraattinen Puolue
Acronym: SDP Finland
Nouvelle Donne - New Deal
Acronym: ND
Place Publique
Acronym: PP
Socialist Party - Parti Socialiste
Acronym: PS France
Sozialdemokratische Partei Deutschlands - Social Democratic Party of Germany
Acronym: SPD Germany
PASOK – Movement for Change (PASOK-KINAL)
Acronym: KIN.AL (Movement for Change)
Democratic Coalition - Demokratikus Koalicio
Acronym: dk
Esély Közösség
Hungarian Socialist Party - Magyar Szocialista Párt
Acronym: MSZP
Democratic Party - Partito Democratico
Acronym: PD
Honor to serve Riga - Gods kalpot Rīgai
Acronym: GKR
Social Democratic Party "Saskaņa" - Sociāldemokrātiskā Partija Saskaņa
Acronym: Saskaņa – SDPS
Lithuanian Social Democratic Party - Lietuvos Socialdemokratu Partija
Acronym: LSDP
Party Luxembourgian Socialist Workers' - Lëtzebuerger sozialistesch Aarbechterpartei
Acronym: LSAP
Labour Party - Parti Laburista
Acronym: LP Malta
Dutch Labour Party - Partij Van De Arbeid
Acronym: PvdA
Nowa Lewica
Socialist Party - Partido Socialista
Acronym: PS
PRO România
Acronym: PRO
Social Democratic Party - Partidul Social Democrat
Acronym: PSD
Social Liberal Humanist Party - Partidul Umanist Social Liberal
Acronym: PUSL
Social Democrats - Socialni Demokrati
Acronym: SD Slovenia
Socialists’ Party of Catalonia - Partit dels Socialistes de Catalunya
Acronym: PSC
Spanish Socialist Workers’ Party - Partido Socialista Obrero Espanol
Acronym: PSOE
Swedish Social Democratic Party - Sveriges Socialdemokratiska Arbetareparti
Acronym: SAP