- Remarks by President António Costa at the press conference following the Partners for multilateralism summit
- Opening remarks by President António Costa at the Partners for multilateralism summit
- Joint press release following trilateral EU-Australia Leaders meeting
- Declaration of the Partners for Multilateralism (P4M) summit, 21 September 2026
- “Multilateralism is not idealism, it’s a necessity” – op-ed article by President António Costa, President Inácio Lula da Silva, President William Ruto and Prime Minister Mark Carney



