Saudi Arabia’s longstanding precondition of credible progress toward Palestinian statehood continues to block its accession, the most consequential remaining candidate, while recent alternative security arrangements such as the Mecca Joint Defence Agreement with Turkey and Pakistan allow Riyadh to pursue regional stability without normalization. Kazakhstan’s 2025 accession and Somaliland’s expressed interest represent the only recent expansions, with no verified diplomatic breakthroughs or scheduled summits likely to produce another signatory before year-end. U.S. pressure linking a Saudi civil nuclear agreement to the Accords has not altered Riyadh’s position, and public statements from Saudi officials emphasize that Palestinian considerations remain non-negotiable. These dynamics sustain trader consensus around a low probability of additional accessions in the brief window remaining.