This report provides a synthesis of information reported by Parties in their first biennial transparency report submissions, including their national inventory reports. Submissions received as at 15 April 2025 were included in the synthesis. The structure of the report aligns with the reporting format set out in the modalities, procedures and guidelines for the transparency framework for action and support referred to in Article 13 of the Paris Agreement, and as such, synthesizes information on greenhouse gas emissions and removals, information necessary to track progress in implementing and achieving nationally determined contributions under Article 4 of the Paris Agreement, information on climate change impacts and adaptation under Article 7 of the Paris Agreement, and information on financial, technology development and transfer, and capacity-building support.