| 28.07 Data as of 10:45am ET |  -0.38 / -1.34%Today’s Change | 21.13 Today|||52-Week Range 29.95 | +12.37% Year-to-Date |
| Mutual fund holders | 63.73% |
| Other institutional | 45.88% |
| Individual stakeholders | 1.46% |
| 3/31/2013 | WEISS MULTI-STRATEGY ADVISERS LL... Bought 1.7 Million shares of Corporate Office Properti... |
| 3/31/2013 | JPMORGAN INVESTMENT MANAGEMENT, ... Bought 1.1 Million shares of Corporate Office Properti... |
| 3/31/2013 | COHEN & STEERS CAPITAL MANAGEMEN... Bought 897.0 Thousand shares of Corporate Office Properti... |
| Stockholder | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Cohen & Steers Capital Management... | 13.27% | 10,803,603 | 313,196,451 | +897,000 | +9.05% |
| The Vanguard Group, Inc. | 12.52% | 10,187,000 | 295,321,130 | +470,496 | +4.84% |
| APG Asset Management US, Inc. | 11.47% | 9,331,986 | 270,534,274 | -63,212 | -0.67% |
| BlackRock Fund Advisors | 7.66% | 6,234,412 | 180,735,604 | +296,888 | +5.00% |
| Daiwa Asset Management Co. Ltd. | 3.65% | 2,974,524 | 86,231,451 | +373,517 | +14.36% |
| SSgA Funds Management, Inc. | 3.01% | 2,452,004 | 71,083,596 | -709,323 | -22.44% |
| LaSalle Investment Management Sec... | 2.80% | 2,277,451 | 66,023,304 | -750,539 | -24.79% |
| Manning & Napier Advisors LLC | 2.64% | 2,149,243 | 62,306,555 | -31,234 | -1.43% |
| Invesco Advisers, Inc. | 2.49% | 2,025,582 | 58,721,622 | -20,528 | -1.00% |
| Pacific Heights Asset Management ... | 2.46% | 2,000,000 | 57,980,000 | 0 | 0.00% |
| Mutual fund | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Stichting Pensioenfonds ABP (Glob... | 8.22% | 6,693,416 | 194,042,130 | +1,259,016 | +23.17% |
| Vanguard REIT Index Fund | 6.78% | 5,516,226 | 159,915,392 | +242,530 | +4.60% |
| Cohen & Steers Realty Shares Fund | 3.15% | 2,559,583 | 74,202,311 | -97,486 | -3.67% |
| Shinko Investment US REIT Open | 2.55% | 2,078,135 | 60,245,134 | -536,500 | -20.52% |
| Permanent Portfolio Family of Fun... | 2.46% | 2,000,000 | 57,980,000 | 0 | 0.00% |
| Nikko Asset World REIT Mother Fun... | 2.24% | 1,824,457 | 52,891,008 | -670,749 | -26.88% |
| Daiwa Asset AMERICA REIT Fund | 1.87% | 1,521,490 | 44,107,995 | +73,200 | +5.05% |
| Daiwa Asset US-REIT Open Mother F... | 1.83% | 1,486,530 | 43,094,505 | +30,600 | +2.10% |
| Vanguard Small Cap Index Fund | 1.63% | 1,322,548 | 38,340,667 | +157,479 | +13.52% |
| Cohen & Steers Institutional Real... | 1.58% | 1,281,671 | 37,155,642 | +60,255 | +4.93% |
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