Porsche will be one step closer to acquiring majority control of Volkswagen on September 2, when its deal to buy 4.9 percent of that company's ordinary shares takes effect.

The VW takeover "will be executed piece by piece," Porsche CEO Wendelin Wiedeking said during an event in the Black Forest on Wednesday evening.

A spokesman for Porsche said the deal closes on that day in early September.

The purchase of another 4.9 percent of VW common shares was necessary before Porsche could proceed with gaining regulatory approval from the European Commission, which required further proof a takeover was indeed intended.

Once Porsche has received the green light from various antitrust authorities, it plans to raise its voting stake in Volkswagen to over 50 percent.