This Knowledge Transfer Report describes and evaluate Knowledge Transfer activities undertaken by the Cos4Cloud project. Cos4Cloud's methodology to develop and monitor its KT strategy was based on common practices implemented by the H2020 community and on requirements and recommendations from the funding agency, the European Commission. It is important to underline that some aspects of a KT strategy cannot be evaluated quantitatively and have been challenging to measure. Having said that, the Cos4Cloud methodology for KT transfer and its evaluation has proven itself effective for keeping track of the consortium efforts in KT, monitoring the Cos4Cloud KT activities and whether they were aligned with the target stakeholders and the KT goals, as well as to adjust the strategy if necessary. Implementing and evaluating the Cos4Cloud Knowledge Transfer framework has been a unique opportunity to understand KT within the project, providing us with some practical lessons to make this transfer effective. In the case of Cos4Cloud, setting up clear KT Outputs and key stakeholders was crucial for developing the project’s KT strategy and involving all the consortium members in its implementation. Besides, in Cos4Cloud, the events were key for the success of the KT strategy; they allowed us to be in direct contact with the community and make this transfer more effective.