C Street Advisory Group | 2,879 followers on LinkedIn. A Market-Defining Strategic Advisory and Communications firm for the most complex and unique situations. | C Street is a market-defining strategic advisory and communications firm. We guide the world’s leading companies through their most complex financial and operational times, empowering them to communicate with their stakeholders and the media powerfully and consistently. C Street was purposely built to redefine how companies communicate in complex special situations, combining decades of legal experience with strategic communications expertise in one firm for the first time.