In this paper, we review the literature on industrial ecosystems and EU Taxonomy of sustainable activities. We then measure the size, dynamics and specialisation of the industrial ecosystems in Italy - as defined by the European Commission. Subsequently, we try to assess how much different sectors will be involved in the Taxonomy of sustainable activities: Manufacturing, Transportation, Electricity and Water Supply are those strongly involved in terms of employees. EU Taxonomy will radically change in the near future the financial reporting requirements and strategic management actions in the corporate system towards green transition. Firms need to improve their level of knowledge of the Taxonomy and identify suitable actions in order to align with it.