Holtzbrinck Publishing Group

Holtzbrinck Publishing Group (German: "Verlagsgruppe Georg von Holtzbrinck") is a private publishing company of Germany. Their office is located in Stuttgart, capital of Baden-Württemberg. 
Holtzbrinck Publishing Group is one of the big five English-language publishing companies in the world. The other four publishing companies are Penguin Random House (Bertelsmann), Hachette (Lagardère), HarperCollins (News Corp), Simon &amp; Schuster (National Amusements).
Subsidiaries.
United States.
In the US, it trades through Macmillan Publishers name.