A major difference between financial reporting and reporting on sustainability performance is that these last reports are much more transparent on the sustainability performance in the value chain. The most relevant topics to report on are those that reflect a company’s significant environmental impacts or substantively influence the assessments and decisions of stakeholders. Insight into the justified information needs from users is necessary to be able to provide relevant environmental data 43 The process for defining report content is therefore based on a materiality process that finds its basis in stakeholder engagement. Although guidance is given, in practice, companies still struggle on how to perform such materiality assessments and identify the most relevant indicators to report on.