Data journalism is an evolving form of investigative journalism. In previous research andhandbooks published on this topic, this form of journalism has been called computer-assistedreporting and data-driven journalism, as well as precision, computational or database journalism.In Sweden, data journalism is still fairly uncommon. The purpose of this paper is to providean overview of the development of data journalism at seven Swedish traditional mediacompanies, using action research methods. The content of this paper is based on an onlinesurvey of journalists and in-depth interviews with editors at these participating companies. Theresults indicate that, based on how this field is currently perceived by journalists in the interviews,there is a common definition of data journalism. Furthermore, the survey shows thatthe attitudes towards data journalism during the process of introducing new methods andgenres of journalism into “old” organizations are correlated with the level of perceived experiencein data journalism working methods. The main challenges facing the working methodsof data journalism today are a shortage of time and the need for training and developingdata journalism skills.