This document provides a summary of the second (final) stakeholder workshop that took place on 19 May 2021 during the 5G Supply Market Trends study contracted by the European Commission. The second stakeholder workshop served the purpose to disseminate, discuss and validate the findings of the study on the 5G supply market trends and to discuss and further elaborate policy options for the future development of 5G. The workshop was open to all stakeholders interested in the development of the 5G supply market. Overall, 227 interested stakeholders participated in the workshop. The workshop started with a presentation of the results of the impact analysis of key development pathways in the 5G network ecosystem as outlined in the workshop background paper, which had been made available to the community in advance. Following a presentation of the study finding and an overview on policy options, these were validated and discussed in an expert panel discussion. Moreover, the audience could post questions in the chat of the conferencing tool and provide open feedback and suggestions on policy options via a live online survey. This document provides a short overview on the feedback from experts and the audience, including suggestions for policy options. The findings of this workshop will be used to validate and fine-tune the key findings of the impact analysis of the 5G supply market scenarios. The feedback by experts and participants allows clarification of possible misunderstandings in the draft key findings, adjustment to the summary of key findings, and prioritization of their policy relevance. The results of the workshop will directly feed into the process of specifying concrete policy options.