Universities, across the globe, are increasingly judged on social and economic impact. An important initiative in the UK is the Research Excellence Framework (REF) 2014, which assessed the wider impact of university research. The Impact Case Studies, produced for REF 2014, provide a rich new source of information to explore the wider impact of Business and Management (B&M) research. Each B&M case study, from a structured sample of 194, was read and analysed for this paper. The detailed findings show significant differences between sub-disciplines in demonstrating impact and illustrate why some research reaches a wider audience. The findings show a relatively low level of Mode 2 knowledge production, but a wide range of levels and types of engagement with research users across disciplines. The implications of the findings are discussed in relation to building a more nuanced theory on modes of knowledge production and in relation to policy and academic practice.