STAMFORD, CT-American Express Corp., has officially put the space it had leased in Stamford shortly after the Sept. 11 terrorist attack on the World Trade Center, on the market for sublease.

PASADENA, CA-The 140,000-sf office building in the city's revived Old Town district was part of a $265 million portfolio that the seller acquired in 1998.

NORTHRIDGE, CA-The new owner of Northridge Marketplace plans a complete renovation and name change. Brokers say buyers are investing in retail centers here because the area's dense population and the lack of land all but ensure a profit.

HAMPTON, VA-NASA takes on 16,000 sf of flex space in Langley Research and Development Park's new 50,000-sf structure at 130 Research Dr. Employees are scheduled to move into the new building, where Raytheon has taken on 25,000 sf of space, this October.