David Nielsen

Patrick Byrne has relinquished his role as chairman of Overstock.com and Stormy Simon was named president of the online discount retailer. Byrne will continue to serve as CEO while current executive vice chairman Jonathan Johnson assumes the chairman responsibilities Byrne has held since 2006. Johnson's prior responsibilities as corporate secretary will be assumed by Mark Griffin, who serves as senior vice president and general counsel. Simon, who previously served as co-president of the company, was named president and retains her seat on the board, while David Nielsen will continue in his role as co-president.

SALT LAKE CITY — Overstock.com has named two co-presidents, Stormy Simon and David Nielsen. A longtime officer and director of the company, Simon previously served as senior vice president in charge of customer and partner care. As co-president, Simon...