| Howard G Buffett Foundation | Decatur | $458,103,720 |
| John D & Catherine T Macarthur Foundation | Chicago | $338,504,565 |
| The Brinson Foundation | Chicago | $106,034,700 |
| Arie and Ida Crown Memorial | Chicago | $89,578,087 |
| Builders Initiative | Chicago | $81,706,966 |
| Zell Family Foundation | Chicago | $69,322,745 |
| Alsam Foundation | Chicago | $66,958,358 |
| Joyce Foundation | Chicago | $59,379,627 |
| Pritzker Family Foundation | Chicago | $53,708,904 |
| St George Corporation | Burr Ridge | $53,419,720 |
| 1111 Foundation | Highland Park | $46,563,165 |
| Caterpillar Foundation | Peoria | $43,500,310 |
| Fulk Family Foundation Inc | Chicago | $42,843,589 |
| Negaunee Foundation Ltd | Northbrook | $41,798,642 |
| John Deere Foundation | Moline | $41,644,645 |
| Circle of Service Foundation | Chicago | $40,437,770 |
| Abbvie Foundation | North Chicago | $39,204,041 |
| Allstate Foundation | Northbrook | $34,845,720 |
| Pritzker Foundation | Chicago | $34,483,333 |
| Paul M Angell Family Foundation | Chicago | $34,078,136 |
| Spencer Foundation | Chicago | $33,169,449 |
| Abbott Fund | Abbott Park | $27,519,182 |
| Polk Bros Foundation Inc | Chicago | $26,551,438 |
| Conduit Foundation | Chicago | $26,059,523 |
| Steans Family Foundation | Chicago | $25,563,771 |
| Accenture Foundation Inc | Chicago | $23,911,494 |
| Walder Family Foundation | Skokie | $22,496,937 |
| The Duchossois Family Foundation | Chicago | $19,226,337 |
| Emerson Elec Charitable Trust | Chicago | $19,201,282 |
| Wayfarer Foundation | Highland Park | $19,164,170 |
| Anthony Pritzker Fam Foundation | Chicago | $18,799,294 |
| James & Madeleine McMullan Family Foundation | Lake Forest | $18,590,973 |
| Imc Chicago Charitable Foundation | Chicago | $17,690,081 |
| Grainger Foundation Inc | Lake Forest | $16,693,000 |
| The Richard H Driehaus Foundation | Chicago | $16,562,718 |
| Trott Family Philanthropies Inc | Chicago | $16,521,190 |
| Antonio J Gracias Family Foundation Inc | Chicago | $16,188,978 |
| Caerus Foundation Inc | Northbrook | $15,029,550 |
| Scanlan Family Foundation | Chicago | $15,023,308 |
| Jackson Kemper Foundation | Hawthorn Wds | $15,008,802 |
| Jewel Nail Bomar Trust 8336230300 | Chicago | $14,821,930 |
| Alphawood Foundation | Chicago | $14,700,357 |
| Dauten Family Foundation | Chicago | $14,486,976 |
| The Bobolink Foundation | Chicago | $14,270,051 |
| Peoples Support Foundation Limited | Chicago | $14,128,430 |
| Motorola Solutions Foundation | Chicago | $13,329,442 |
| Serr Charitable Action Tr Uw 09242002 | Chicago | $13,323,568 |
| Pritzker Traubert Foundation | Chicago | $13,206,131 |
| The Walsh Foundation | Chicago | $13,198,750 |
| Dick and Timmy Burton Foundation | PO Box Ch | $13,030,500 |
| Bluhm Family Charitable Foundation | Chicago | $12,773,283 |
| The John and Kathleen Schreiber Foundation | Lake Forest | $12,732,763 |
| Reva & David Logan Foundation | Chicago | $12,296,006 |
| State Farm Companies Foundation | Bloomington | $12,000,588 |
| The Irving Harris Foundation | Chicago | $11,992,337 |
| Foglia Family Foundation | Chicago | $11,776,741 |
| Dunard Fund Ltd | Northbrook | $11,503,100 |
| Mansueto Foundation | Chicago | $11,272,156 |
| Tull Fam Foundation | Chicago | $11,268,000 |
| Exelon Foundation | Chicago | $11,040,753 |
| White Pines Foundation | Champaign | $10,943,350 |
| Clara Abbott Foundation | Abbott Park | $10,852,363 |
| Chicagobeyond Inc | Chicago | $10,465,381 |
| Booth Ferris Foundation | Chicago | $10,378,100 |
| Gerald A & Karen Kolschowsky Foundation Inc | Downers Grove | $10,359,400 |
| David F and Margaret T Grohne Family Foundation | Western Sprgs | $10,275,400 |
| Richard L Duchossois Memorial Foundation | Chicago | $10,184,598 |
| Chicago Cred Inc | Chicago | $10,141,178 |
| Terra Foundation for American Art | Chicago | $9,907,025 |
| Vivo Foundation | Libertyville | $9,737,608 |
| Buntrock Foundation for Leadership | Oakbrook Ter | $9,702,007 |
| The Pritzker Pucker Family Foundation | Chicago | $9,693,641 |
| The Baxter Foundation | Deerfield | $9,678,366 |
| J S Frank Foundation | Deerfield | $9,150,770 |
| Coleman Foundation Inc | Chicago | $9,116,544 |
| Saul Zaentz Charitable Foundation | Glenview | $9,103,616 |
| Walgreens Assistance Inc | Deerfield | $8,979,696 |
| Frechette Family Foundation | Chicago | $8,760,086 |
| Wayne and Nan Kocourek Foundation | Buffalo Grove | $8,648,270 |
| Klaff Family Foundation | Chicago | $8,479,057 |
| Tracy Family Foundation | Mt Sterling | $8,266,392 |
| Wilemal Fund | Chicago | $8,161,744 |
| Lloyd A Fry Foundation | Chicago | $8,130,543 |
| Dr Scholl Foundation | Northbrook | $8,110,000 |
| Ed Uihlein Family Foundation | Lake Forest | $7,816,654 |
| Frank E Payne and Seba B Payne Foundation | Chicago | $7,814,000 |
| Anahata Foundation | Chicago | $7,526,200 |
| Tawani Charitable Distribution Fund | Chicago | $7,464,895 |
| Julian Grace Foundation | Highland Park | $7,383,639 |
| Canning Foundation | Chicago | $7,326,939 |
| Sunshine Charitable Foundation | Libertyville | $7,272,365 |
| Hunter Family Foundation | Chicago | $7,256,600 |
| Beatrice P Delaney Char Fdn | Chicago | $6,262,500 |
| Cushing Family Foundation | Chicago | $690,000 |
| The Clayton Brown Foundation | Wheaton | $550,000 |