Germany’s Der Spiegel was first to break the news and has reported that Porsche’s union boss, Uwe Hueck, also had his phone tapped and was talking to police. Local Police authorities have since confirmed they are investigating the case after a formal complaint was made by Porsche.
The allegations come as Porsche is about to increase its stake in VW beyond the current 31% to a majority holding. Standing in Porsche’s way is the German state of Lower Saxony, which still holds a 20% stake in VW. All three parties are currently locked in a battle over plans to change a rule under which "significant decisions" would require the approval of more than 80% of shareholders.