This Parallel Session will discuss on how to enhance the involvement of companies from Central, Eastern and South-Eastern Europe in the discourse on Big Science. Their potential contribution to the consolidation of the European Big Science common market was the focus of the BSBF promotional roadshow jointly organized by the Italian Ministry of Foreign Affairs, the Central European Initiative and the Autonomous Region Friuli Venezia Giulia, which reached out to Serbia, Slovak Republic, Czech Republic, Poland, Hungary, Croatia, Slovenia and Montenegro between February and June 2024. Existing best practices, opportunities, as well as barriers, will be openly debated to encourage future stronger connections between Big Science Organisations and operators from this broad area of Europe.