The European Commission has informed X, formerly known as Twitter, of its preliminary view that it is in breach of the EU Digital Services Act (EU DSA) in areas linked to dark patterns, advertising transparency and data access for researchers. Based on an in-depth investigation that included, among others, the analysis of internal company documents, interviews with experts, as well as cooperation with national Digital Services Coordinators, the Commission has issued preliminary findings of non-compliance on three grievances. First, as X designs and operates its interface for 'verified accounts' with the 'Blue checkmark' in a way that does not correspond to industry practice, in the Commission's assessment, X deceives users. Second, the Commission considers that X does not comply with the required transparency on advertising, as it does not provide a searchable and reliable advertisement repository, but instead put in place design features and access barriers that make the repository unfit for its transparency purpose towards users. Third, in the Commission's view, X fails to provide access to its public data to researchers in line with the conditions set out in the EU DSA, in particular, with a prohibition on eligible researchers from independently accessing its public data, such as by scraping, as stated in its terms of service. This preliminary finding is without prejudice to the outcome of the investigation as X can exercise its rights of defence by examining the documents in the Commission's investigation file and by replying in writing to the Commission's preliminary findings.