Exploring how coalitions among member states are formed in international organisations is important to understanding ongoing global governance. Analysis of co-sponsorship patterns offers valuable insight into decision-making processes in the United Nations Security Council (UNSC). Our study utilises recently compiled data to investigate co-authorship of resolutions in the UNSC and compares them with co-sponsorship information of United Nations General Assembly (UNGA) resolutions. We observe an alignment between China and Russia among the permanent UNSC member states and a gradual shift towards a more individualistic approach among Western powers in the Security Council. The observed trends for the Security Council, however, are mitigated by the practice of ‘penholdership’, in which P3 members (France, UK, and USA) play an important agenda-setting role. Our analysis of co-sponsorship patterns in the UNGA supports these findings, demonstrating a convergence between Russia and China, and a gradual divergence of Moscow from the P3 countries in UNGA-supported resolutions, while France and the UK are still often aligned. Our research provides valuable insights into the strategic priorities and alliances that influence global governance, notably based on evolving patterns of UNSC resolution co-sponsorship.