| 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) |
| Croatia | Social Democratic Party (SDP) |
| Chile | Socialist Party of Chile (PS) |
| 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) |
