International mergers and acquisitions (M&A) are likely to pose special challenges for in-house counsel by adding a multi-jurisdictional dimension to the regulatory review and approval process. Discover the differing merger control regimes that must be complied with in doing M&A transactions in the European Union, Canada, China and elsewhere, including the notification thresholds, notification requirements and review processes. Then, explore the issues that arise in managing multiple regulatory compliance processes when the transaction triggers reviews in two or more jurisdictions.