- Partido Comunista de España (Communist Party of Spain, communist)
- Partido de Acción Socialista (Socialist Action Party, socialist)
- Izquierda Republicana (Republican Left, progressive centrist)
- Esquerra Unida i Alternativa
- - Partit Socialista Unificat de Catalunya (Unified Socialist Party of Catalonia, regional socialist)
- - Partit dels i les Comunistes de Catalunya (Party of Communists of Catalonia, regional communist)
- Candidatura Unitaria de Trabajadores (Unitarian Candidature of Workers, extreme left)
- Berdak-Les Verds