Rank

Name/(state)

Assets

As of
Fiscal Year
End Date

1.

Bill & Melinda Gates Foundation (WA)

$33,120,381,000

12/31/06

2.

The Ford Foundation (NY)

11,615,906,693

09/30/05

3.

J. Paul Getty Trust (CA)

9,618,627,974

06/30/05

4.

The Robert Wood Johnson Foundation (NJ)

9,367,614,774

12/31/05

5.

The William and Flora Hewlett Foundation (CA)

8,520,765,000

12/31/06

6.

Lilly Endowment Inc. (IN)

8,360,760,584

12/31/05

7.

W. K. Kellogg Foundation (MI)

7,799,270,734

08/31/06

8.

The David and Lucile Packard Foundation (CA)

6,351,000,000

12/31/06

9.

The Andrew W. Mellon Foundation (NY)

5,586,112,102

12/31/05

10.

John D. and Catherine T. MacArthur Foundation (IL)

5,492,269,240

12/31/05

11.

Gordon and Betty Moore Foundation (CA)

5,308,627,945

12/31/05

12.

The California Endowment (CA)

4,405,938,934

02/28/06

13.

The Rockefeller Foundation (NY)

3,417,557,613

12/31/05

14.

The Starr Foundation (NY)

3,344,801,753

12/31/05

15.

The Annie E. Casey Foundation (MD)

3,265,655,271

12/31/06

16.

The Kresge Foundation (MI)

3,032,422,497

12/31/05

17.

The Duke Endowment (NC)

2,708,834,085

12/31/05

18.

The Annenberg Foundation (PA)

2,539,268,854

06/30/06

19.

Carnegie Corporation of New York (NY)

2,530,191,576

09/30/06

20.

Charles Stewart Mott Foundation (MI)

2,480,562,766

12/31/05