As part of their digital transformation, firms increasingly appoint Chief Digital Officers (CDOs). Existing research suggests that CDOs are appointed to drive and coordinate digital transformation activities and communicate digital transformation-related topics to stakeholders. However, the specific role of the CDO as a mediator between a firm and its external stakeholders, such as investors, remains unclear. Relying on signaling theory, we investigate whether CDO presence impacts digital transformation-related signaling in firms external communication tools. Indeed, our results show a strong positive association between CDO presence and the volume of digital transformation-related signals. Therefore, it can be assumed that CDO presence has the potential to contribute to reducing digital transformation-related information asymmetries between firms and external stakeholders. However, since our results show that less regulated communication tools are more likely to be used for digital transformation-related signaling than highly regulated ones, the reliability of such signals remains questionable.