US Federal Properties Trust, Inc. wants to be Uncle Sam's landlord. The company formed in 2010 with plans to qualify as a self-managed real estate investment trust (REIT), a legal entity exempt from paying corporate taxes. Through its operating partner, U.S. Federal Properties Partnership, LP, the company plans to lease property to US government agencies through the General Services Administration (GSA). US Federal Properties Trust owns 15 buildings that total almost half a million square feet. Tenants include the FBI in Ohio, Homeland Security in Colorado, Social Security in Texas, and the Border Patrol in Florida and Vermont. US Federal Properties Trust filed to go public in 2010.