Otto GmbH & Co KG (doing business as Otto Group, stylized as otto group, formerly Otto Versand) is a German mail order company and one of the world's biggest e-commerce companies. Based in Hamburg, it operates in more than twenty countries. Otto is primarily a retail e-commerce company, and as a shareholder, it also operates in e-commerce services. The Otto group has expanded into real estate and financial services. In France, Otto claims to be the leading e-commerce business through 3 Suisses. In June 2013, Otto executed a full takeover to become its only shareholder.