 In 2004 the GM Pension Trust sold a half interest in a portfolio of shopping centers, including Stoneridge, to The Mills Corporation, which also assumed management of the center.A joint venture led by Simon Property Group purchased The Mills Corp. in 2007, bringing Stoneridge under the Simon banner.Plans to renovate and expand the property were announced in 2005, calling for the construction of a new, smaller Nordstrom store and the addition of new shops, restaurants, and a cinema within the existing Nordstrom building's footprint.