This report contains the preliminary findings of the first periodic assessment of the effectiveness and adequacy of the support provided to the Technology Mechanism in supporting the implementation of the Paris Agreement on matters relating to technology development and transfer. The findings address the areas of assessment suggested under the scope of the periodic assessment contained in the annex to decision 16/CMA.1, including the outputs, outcomes and impact of the Technology Mechanism. The report includes a discussion of the methodological approach to the periodic assessment.