Socialist Party

Secretary-General: Mário Soares (19 April 1973 – 29 June 1986), António de Almeida Santos (ad interim, 13 June 1985 – 13 November 1985), António Macedo (ad interim, 13 November 1985 – 29 June 1986), Vítor Constâncio (29 June 1986 – 16 January 1989), Jorge Sampaio (16 January 1989 – 23 February 1992), António Guterres (23 February 1992 – 19 January 2002), Eduardo Ferro Rodrigues (19 January 2002 – 27 September 2004), José Sócrates (27 September 2004 – 23 July 2011), António José Seguro (23 July 2011 – 28 September 2014), Maria de Belém Roseira (ad interim, 28 September 2014 – 22 November 2014), António Costa (22 November 2014 – 7 January 2024), Pedro Nuno Santos (7 January 2024 – 24 May 2025), Carlos César (ad interim, 24 May 2025 – 28 June 2025), José Luís Carneiro (since 28 June 2025)