 Alliancebernstein L.P. increased its holdings in Piedmont Office Realty Trust, Inc. NYSE:PDM by 0.5 during the 1st quarter, according to the company in its most recent disclosure with the Securities Exchange Commission. The fund owned 247,543 shares of the real estate investment trusts stock after purchasing an additional 1,180 shares during the quarter. Alliancebernstein ... 