Over the decade or so since the global financial crisis rocked EU financial markets and led to wide-ranging reforms, EU securities and financial markets regulation has continued to evolve. The legislative framework has been refined and administrative rulemaking has expanded. Alongside, the Capital Markets Union agenda has developed, the UK has left the EU, and ESMA has emerged as a decisive influence on EU financial markets governance. All these developments, as well as the Covid-19 pandemic, have shaped the regulatory landscape and how supervision is organized. EU Securities and Financial Markets Regulation provides a comprehensive, critical, and contextual account of the intricate rulebook that governs EU financial markets and its supporting institutional arrangements. It is framed by an assessment of how the regime has evolved over the decade or so since the global financial crisis and considers, among other matters, the post-crisis reforms to key legislative measures, the massive expansion of administrative rulemaking and of soft law, the Capital Markets Union agenda, the development of supervisory convergence as the means for organizing pan-EU supervision, and ESMA’s role in EU financial markets governance. Its coverage extends from capital-raising and the Prospectus Regulation to financial market intermediation and the Mi FID II/Mi FIR and IFD/IFR regimes, to the new regulatory regimes adopted since the global financial crisis (including for benchmarks and their administrators), to retail market regulation and the PRIIPs Regulation, and on to the EU’s third country regime and the implications of the UK’s departure from the EU. This is the fourth edition of the highly successful and authoritative monograph first published as EC Securities Regulation. Heavily revised from the third edition to reflect developments since the global financial crisis, it adopts the in-depth contextual and analytical approach of earlier editions and so considers the market, political, institutional, and international context of the regulatory and supervisory regime.