In the evolution of software, stakeholders continuously seek and consult various information artifacts and their interdependencies to successfully complete their daily activities. While a lot of research has focused on supporting stakeholders in satisfying various information needs, there is little empirical evidence on how these information needs manifest themselves in the context of professional software development teams of real world companies. To investigate the information needs of the different stakeholder roles involved in software evolution activities, we conducted an empirical study with 23 participants from two professional development teams of one company. The analysis of the gathered data shows that information needs exhibit a crosscutting nature with respect to stakeholder role, activity, artifacts and even fragments of artifacts. We also found that the dependencies between information artifacts are important for the successful performance of software evolution activities, but often not captured explicitly. The lack of an explicit representation of these interdependencies often result in difficulties identifying dependent artifacts and additional communication effort. Based on our findings, we suggest ways to better support stakeholders with their information needs.