| Argentina | Socialist Party (PS) | 
| Australia | Australian Labor Party (ALP) | 
| Austria | Social Democratic Party of Austria (SPÖ) | 
| Belgium | Socialist Party (SPA) | 
| Belgium | Socialist Party (PS) | 
| Burma | National League for Democracy (NLD) | 
| Cameroon | Social Democratic Front (SDF) | 
| Central African Republic | Movement for the Liberation of the Central African People (MLPC) | 
| Chile | Party for Democracy (PPD) | 
| Chile | Socialist Party of Chile (PS) | 
| Croatia | Social Democratic Party (SDP) | 
| Democratic Republic of Congo | Union for Democracy and Social Progress (UDPS) | 
| Cyprus | Cyprus Movement of Social Democrats (EDEK) | 
| Cyprus | Republican Turkish Party (CTP) | 
| Czech Republic | Czech Social Democratic Party (CSSD) | 
| Denmark | Social Democratic Party | 
| Dominican Republic | Dominican Revolutionary Party (PRD) | 
| Egypt | Egyptian Social Democratic Party (ESDP) | 
| Equatorial Guinea | Convergence for Social Democracy (CPDS) – excused | 
| Eritrea | Eritrean People‘s Democratic Party (EPDP) | 
| Finland | Finnish Social Democratic Party (SDP) | 
| France | Socialist Party (PS) | 
| Germany | Social Democratic Party of Germany (SPD) | 
| Ghana | National Democratic Congress (NDC) | 
| Great Britain | The Labour Party | 
| Greece | Panhellenic Socialist Movement (PASOK) | 
| Guinea | Guinean People‘s Assembly (RPG) | 
| Hungary | Hungarian Socialist Party (MSzP) | 
| India | Indian National Congress (INC) | 
| India | Association for Democratic Socialism | 
| Iran | Democratic Party of Iranian Kurdistan (PDKI) | 
| Iraq | Patriotic Union of Kurdistan (PUK) | 
| Iraq | Kurdistan Socialist Democratic Party (KSDP) | 
| Ireland | The Labour Party | 
| Israel | Labour Party (Avoda) | 
| Israel | Meretz Party | 
| Italy | Democratic Party (PD) | 
| Latvia | Latvia Concord Social Democratic Party (SDPS) | 
| Lebanon | Progressive Socialist Party (PSP) | 
| Lithuania | Lithuanian Social Democratic Party (LSDP) | 
| Luxemburg | Luxembourg Socialist Workers‘ Party (LSAP) | 
| Malaysia | Democratic Action Party (DAP) | 
| Mauritania | Assembly of Democratic Forces (RFD) | 
| Mauritius | Mauritius Militant Movement (MMM) | 
| Mongolia | Mongolian People‘s Party (MPP) excused | 
| Montenegro | Social Democratic Party of Montenegro (SDP) | 
| Montenegro | Democratic Party of Socialists of Montenegro (DPS) | 
| Morocco | Socialist Union of Popular Forces (USFP) | 
| Mexico | Party of Democratic Revolution (PRD) | 
| Netherlands | Labour Party (PvdA) | 
| Norway | Norwegian Labour Party (DNA) | 
| Palestine | Fatah | 
| Palestine | Palestinian National Initiative (PNI) | 
| Philippines | Citizens‘ Action Party (Akbayan) | 
| Poland | Democratic Left Alliance (SLD) | 
| Portugal | Socialist Party (PS) | 
| Republic of Moldova | Democratic Party (PDM) | 
| Romania | Social Democratic Party (PSD) | 
| Russia | A Just Russia Party | 
| Senegal | Socialist Party (PS) | 
| Serbia | Democratic Party (DS) | 
| Slovenia | Social Democrats (SD) | 
| South Africa | African National Congress (ANC) | 
| South Korea | Democratic United Party (DUP) | 
| Spain | Spanish Socialist Workers‘ Party (PSOE) | 
| Sweden | Swedish Social Democratic Party (SAP) | 
| Switzerland | Social Democratic Party of Switzerland | 
| Tanzania | Chama Cha Mapinduzi (CCM) | 
| Tunisia | Democratic Forum for Labour and Freedoms (FDTL) | 
| Turkey | Republican People‘s Party (CHP) | 
| USA | Democratic Party | 
| Uruguay | Socialist Party of Uruguay (PSU) – excused | 
| Western Sahara | Polisario Front | 
| Yemen | Yemeni Socialist Party (YSP) | 
| Zimbabwe | Movement for Democratic Change (MDC-T) | 
| Foundation for European Progressive Studies (FEPS) | |
| Group of the Progressive Alliance of Socialists & Democrats in the European Parliament (S&D Group) | |
| International Trade Union Confederation (ITUC) | |
| International Union of Socialist Youth (IUSY) | |
| Party of European Socialist Women (PES Women) | |
| Socialist International Women (SIW) | |
| Solidar | |
| Young European Socialists (YES) |