Overstock.com, Inc. operates on online shopping commercial site. The firm also sells these products through www.overstock.com, www.o.com, and www.o.biz. It operates through the following business segments: Retail, tZERO, and Other. The Retail Segment engages in e-commerce sales through its website. The tZERO Segment focuses on securities transaction through its broker-dealers. The Other Segment consists of Medici business. The company was founded by Patrick Michael Byrne on May 5, 1997 and is headquartered in headquartered in Salt Lake City, UT.