To deliver accurate decisions in tight timelines, the EU merger control system has procedural rules regarding gun jumping (i.e., no implementation of concentrations before notification/clearance) and provision of correct/non-misleading information. Recently, the Court issued two judgments and the Commission adopted three decisions applying these rules. The Courts’ judgments provide guidance on the concepts of partial implementation; single concentration; and fines for gun-jumping. The Commission’s decisions concerned gun-jumping through warehousing schemes (Canon), through veto rights in agreements and during integration discussions (Altice). In $\mathit{GE}$ /LM Wind, the Commission emphasized the need for precise information in merger notifications, including on parties’ pipeline activities.