This document summarizes regulations around lobbying in the EU and its member states. It discusses the key rule-setting bodies like the OECD and Transparency International, and their views that lobbying is an important part of democratic debate when done transparently. It notes that government policy can significantly affect companies' value. The EU's approach is to require registration of any group seeking to influence EU policymaking. Mandatory registration systems exist in only a few EU member states. Areas that can be regulated include defining lobbyists, registration procedures, spending disclosure, and enforcement mechanisms. Alternatively, self-regulation, government transparency, and a free press can provide transparency without mandatory rules.