| SC 13G/A | 2015-02-11 | VANGUARD GROUP INC | Piedmont Office Realty Trust, Inc. | 20,929,948 | 13.6% | EDGAR |
| SC 13G | 2015-02-10 | AMERICAN CENTURY INVESTMENT MANAGEMENT INC | Piedmont Office Realty Trust, Inc. | 8,045,451 | 5.2% | EDGAR |
| SC 13G/A | 2015-02-09 | BlackRock Inc. | Piedmont Office Realty Trust, Inc. | 9,630,083 | 6.2% | EDGAR |
| SC 13G/A | 2015-02-06 | VANGUARD SPECIALIZED FUNDS | Piedmont Office Realty Trust, Inc. | 11,457,419 | 7.4% | EDGAR |
| SC 13G/A | 2015-02-05 | Invesco Ltd. | Piedmont Office Realty Trust, Inc. | 14,604,273 | 9.5% | EDGAR |
| SC 13G | 2014-02-14 | FMR LLC | Piedmont Office Realty Trust, Inc. | 14,258,801 | 8.8% | EDGAR |
| SC 13G/A | 2014-02-11 | VANGUARD GROUP INC | Piedmont Office Realty Trust, Inc. | 20,545,609 | 12.8% | EDGAR |
| SC 13G/A | 2014-02-10 | FMR LLC | Piedmont Office Realty Trust, Inc. | 16,540,630 | 10.3% | EDGAR |
| SC 13G/A | 2014-02-07 | Invesco Ltd. | Piedmont Office Realty Trust, Inc. | 19,323,958 | 11.9% | EDGAR |
| SC 13G/A | 2014-02-04 | VANGUARD SPECIALIZED FUNDS | Piedmont Office Realty Trust, Inc. | 11,248,947 | 7.0% | EDGAR |
| SC 13G/A | 2014-01-30 | BlackRock Inc. | Piedmont Office Realty Trust, Inc. | 9,644,221 | 6.0% | EDGAR |
| SC 13G/A | 2013-06-10 | Invesco Ltd. | Piedmont Office Realty Trust, Inc. | 17,335,767 | 10.3% | EDGAR |
| SC 13G/A | 2013-02-14 | VANGUARD SPECIALIZED FUNDS | Piedmont Office Realty Trust, Inc. | 11,180,555 | 6.7% | EDGAR |
| SC 13G/A | 2013-02-11 | VANGUARD GROUP INC | Piedmont Office Realty Trust, Inc. | 19,325,094 | 11.5% | EDGAR |
| SC 13G/A | 2013-02-08 | Invesco Ltd. | Piedmont Office Realty Trust, Inc. | 9,787,381 | 5.8% | EDGAR |
| SC 13G/A | 2013-01-30 | VANGUARD SPECIALIZED FUNDS | Piedmont Office Realty Trust, Inc. | 11,180,555 | 6.7% | EDGAR |
| SC 13G | 2013-01-30 | BlackRock Inc. | Piedmont Office Realty Trust, Inc. | 9,387,642 | 5.6% | EDGAR |
| SC 13G/A | 2012-04-10 | VANGUARD GROUP INC | Piedmont Office Realty Trust, Inc. | 17,951,573 | 10.4% | EDGAR |
| SC 13G | 2012-02-14 | Invesco Ltd. | Piedmont Office Realty Trust, Inc. | 10,858,321 | 6.3% | EDGAR |
| SC 13G/A | 2012-02-09 | VANGUARD GROUP INC | Piedmont Office Realty Trust, Inc. | 16,539,791 | 9.6% | EDGAR |