A probe into Deutsche Boerse’s CEO purchase of shares could be dropped if the exchange operator agrees to pay fines of up to €10 million. Earlier this year, Frankfurt’s public prosecutor announced it was investigating Carsten Kengeter for purchasing 60,000 Deutsche Boerse shares just months before it announced plans to merge with the London Stock Exchange Group. While the deal fell apart due to demands from competition regulators, it did not lift the shadow of the investigation from Kengeter.