| SC 13G/A | 2021-02-10 | VANGUARD GROUP INC | CORPORATE OFFICE PROPERTIES TRUST | 15,574,655 | 13.9% | EDGAR |
| SC 13G/A | 2021-02-08 | FMR LLC | CORPORATE OFFICE PROPERTIES TRUST | 6,517,825 | 5.8% | EDGAR |
| SC 13G/A | 2021-02-03 | WELLINGTON MANAGEMENT GROUP LLP | CORPORATE OFFICE PROPERTIES TRUST | 2,049,879 | 1.8% | EDGAR |
| SC 13G/A | 2021-01-27 | BlackRock Inc. | CORPORATE OFFICE PROPERTIES TRUST | 12,516,011 | 11.2% | EDGAR |
| SC 13G/A | 2020-02-11 | VANGUARD GROUP INC | CORPORATE OFFICE PROPERTIES TRUST | 16,475,182 | 14.7% | EDGAR |
| SC 13G/A | 2020-02-07 | FMR LLC | CORPORATE OFFICE PROPERTIES TRUST | 11,364,873 | 10.1% | EDGAR |
| SC 13G/A | 2020-02-04 | BlackRock Inc. | CORPORATE OFFICE PROPERTIES TRUST | 12,635,895 | 11.3% | EDGAR |
| SC 13G/A | 2020-01-27 | WELLINGTON MANAGEMENT GROUP LLP | CORPORATE OFFICE PROPERTIES TRUST | 6,262,373 | 5.6% | EDGAR |
| SC 13G/A | 2019-03-11 | FMR LLC | CORPORATE OFFICE PROPERTIES TRUST | 12,030,256 | 10.9% | EDGAR |
| SC 13G/A | 2019-02-13 | FMR LLC | CORPORATE OFFICE PROPERTIES TRUST | 9,366,787 | 8.6% | EDGAR |
| SC 13G/A | 2019-02-12 | WELLINGTON MANAGEMENT GROUP LLP | CORPORATE OFFICE PROPERTIES TRUST | 9,154,719 | 8.4% | EDGAR |
| SC 13G/A | 2019-02-11 | VANGUARD GROUP INC | CORPORATE OFFICE PROPERTIES TRUST | 15,433,838 | 14.2% | EDGAR |
| SC 13G/A | 2019-01-31 | VANGUARD SPECIALIZED FUNDS | CORPORATE OFFICE PROPERTIES TRUST | 4,902,022 | 4.5% | EDGAR |
| SC 13G/A | 2019-01-24 | BlackRock Inc. | CORPORATE OFFICE PROPERTIES TRUST | 12,339,549 | 11.3% | EDGAR |
| SC 13G/A | 2018-05-10 | FMR LLC | CORPORATE OFFICE PROPERTIES TRUST | 11,811,706 | 11.6% | EDGAR |
| SC 13G | 2018-02-13 | FMR LLC | CORPORATE OFFICE PROPERTIES TRUST | 5,937,058 | 5.5% | EDGAR |
| SC 13G/A | 2018-02-09 | VANGUARD GROUP INC | CORPORATE OFFICE PROPERTIES TRUST | 16,364,259 | 15.0% | EDGAR |
| SC 13G | 2018-02-08 | WELLINGTON MANAGEMENT GROUP LLP | CORPORATE OFFICE PROPERTIES TRUST | 8,960,593 | 8.2% | EDGAR |
| SC 13G/A | 2018-02-02 | VANGUARD SPECIALIZED FUNDS | CORPORATE OFFICE PROPERTIES TRUST | 6,697,481 | 6.2% | EDGAR |
| SC 13G/A | 2018-01-19 | BlackRock Inc. | CORPORATE OFFICE PROPERTIES TRUST | 11,314,176 | 10.4% | EDGAR |