Overstock.com announces management changes with co-presidents and new senior VPs.

Overstock.com has announced several changes in its management structure, including the appointment of two co-presidents, Stormy Simon and David Nielsen. Simon will retain her responsibilities for customer and partner care, while adding oversight of warehouse logistics, press relations, social media, and strategic marketing. Nielsen will take on responsibilities for product, engineering, and operations. Two new senior vice presidents, Jonathan Ehrlich and Jonathan Johnson, have also been appointed.