This short chapter considers three types of corporate restructuring: takeovers, mergers and internal reorganisations. The key theme of this book has been that companies are tools that are used to achieve particular ends. So when their human users change their minds about those goals or the best means of achieving them, they can change their companies too. There may be changes in regulation or taxation; or the businesses within a group of companies may wax or wane, suggesting a need to keep some businesses and sell off others; or a multinational group of companies may need to reorganise itself as there are changes across those jurisdictions in which it is based. The forms of restructuring that are considered here are mergers, takeovers and internal reconstructions, although others are possible.