Christian Horner left Red Bull with a reported €60m (£52m) settlement—roughly five years of his contract—after being sacked. He helped build Red Bull into an F1 powerhouse with Adrian Newey but became embroiled in power struggles with Helmut Marko and the Mateschitz family, faced (denied and dismissed) harassment allegations, saw key exits and a performance dip, and now seeks a return with shareholder control despite reputational baggage.