Policy networks fulfil an important role within policymaking. Networks of public and private actors provide information to policymakers and may halt or accommodate policy change. Generally, these networks exhibit stability, but at times, they are transformed due to disruptive shocks. This article compares lobbying networks surrounding three EU financial regulatory agencies before and after the global financial crisis. Utilising network-analytical methods, the analysis assesses network change after the financial crisis and the subsequent institutional and regulatory reforms. The findings show that as lobbying networks expand, they become more fragmented. They also demonstrate that shocks stimulate the entrance of new interest groups and make repeat players more selective in their lobbying efforts. This implies that the financial regulation policy network becomes less club-like after the crisis, allowing new groups to inform regulators about their policy preferences.