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Number of Private Foundations in the United States, 2010
| Total Asset Level | Number | Number Filing With IRS in Past 2 Years | Total Revenue | Total Assets |
| 1-Under $1 mil | 55,969 | 55,969 | 3,973,533,746 | 15,181,864,093 |
| 2-$1-10 mil. | 27,134 | 27,134 | 10,269,303,987 | 73,530,391,491 |
| 3-$10-25 mil. | 3,236 | 3,236 | 6,065,255,981 | 49,849,930,334 |
| 4-More than $25 mil. | 2,540 | 2,540 | 39,170,955,152 | 427,529,840,711 |
| 5-No 990-PF in past 2 years | 31,931 | 0 | 0 | 0 | Total | 120,810 | 88,879 | 59,479,048,866 | 566,092,026,629 |
Source: IRS Business Master File 04/2010 (with modifications by the National Center for Charitable Statistics at the Urban Institute)