| Hamill Family Foundation | | | Local | 5 | 2024 | $2,171,000 |
| Johnson Charitable Gift Fund | | Cincinnati, OH | Local | 1 | 2024 | $1,500,000 |
| Gaylord and Dorothy Donnelley Foundation | | Chicago, IL | National | 6 | 2024 | $445,000 |
| Dupage Community Foundation | | Downers Grove, IL | Local | 8 | 2024 | $250,553 |
| Ranch Spur Charitable Tr | | Wayne, IL | Local | 5 | 2024 | $199,561 |
| G Carl Ball Family Foundation | | West Chicago, IL | Local | 3 | 2024 | $150,000 |
| Friends of the Forest Preserve District of Dupage County | | Wheaton, IL | Local | 1 | 2024 | $62,000 |
| Bosch Community Fund | | Farmingtn Hls, MI | National | 3 | 2024 | $52,305 |
| Community Foundation of the Fox River Valley | | Aurora, IL | Local | 3 | 2024 | $42,319 |
| Schmidgall Family Foundation | | Walland, TN | National | 6 | 2024 | $31,062 |
| American Water Charitable Foundation Inc | | Camden, NJ | National | 3 | 2024 | $17,500 |
| Land Trust Alliance Incorporated | | Washington, DC | Local | 1 | 2024 | $17,000 |
| The Appleby Charitable Foundation C/O Northern Trust Company | | | National | 1 | 2024 | $15,000 |
| Weisner Family Charitable Foundation | | Aurora, IL | Local | 4 | 2024 | $10,900 |
| Greenstate Credit Union | | | Local | 2 | 2024 | $10,250 |
| James a Gammon Charitable Foundation Inc | | Merrillville, IN | Local | 1 | 2024 | $10,000 |
| Village and Wilderness Project Inc | | Oak Bluffs, MA | National | 1 | 2024 | $10,000 |
| Openlands | | Chicago, IL | Local | 1 | 2024 | $10,000 |
| Richard James Mccann Foundation | | Wheaton, IL | Local | 7 | 2024 | $9,500 |
| Charlotte & Norman Codo Charitable Tr | | Chicago, IL | National | 4 | 2024 | $8,500 |
| Corwith Fund | | Chicago, IL | Local | 7 | 2024 | $8,000 |
| Hale Family Foundation Inc | | Chicago, IL | Local | 7 | 2024 | $6,500 |
| I J Feldman Foundation Inc | | Teaneck, NJ | Local | 1 | 2024 | $5,000 |
| Steve & Delores Sarovich Foundation | | Lisle, IL | Local | 3 | 2024 | $825 |
| Jeremy and Hannelore Grantham Environmental Trust | | Boston, MA | National | 1 | 2023 | $3,507,139 |
| Illinois Clean Energy Community Foundation | | | Local | 4 | 2023 | $2,210,308 |
| Mchenry County Conservation Foundation | | Ringwood, IL | Local | 1 | 2023 | $50,000 |
| Nayar Family Foundation C/O Janus & Associates Cpas Pc | | | Local | 4 | 2023 | $44,000 |
| Accendra Health Foundation | | Glen Allen, VA | Local | 1 | 2023 | $20,000 |
| Williams Family Foundation | | Pittsburgh, PA | National | 1 | 2023 | $15,000 |
| Grand Victoria Foundation | | Chicago, IL | Local | 5 | 2022 | $1,055,323 |
| The Steinman Foundation | | Lancaster, PA | Local | 2 | 2022 | $160,000 |
| S & E Bramsen Foundation | | Chicago, IL | Local | 5 | 2022 | $25,000 |
| Morton Arboretum | | Lisle, IL | Local | 3 | 2022 | $22,637 |
| Timken Foundation of Canton | | Canton, OH | Local | 1 | 2021 | $58,500 |
| International Paper Company Foundation | | Memphis, TN | National | 1 | 2021 | $3,259 |
| Bnsf Foundation | | Fort Worth, TX | National | 1 | 2021 | $450 |
| The Conservation Fund a Nonprofit Corporation | | Arlington, VA | National | 2 | 2020 | $21,733 |
| Illinois Stewardship Alliance | | Springfield, IL | Local | 1 | 2020 | $10,000 |
| Rich Foundation | | Sugar Grove, IL | Local | 2 | 2019 | $20,000 |
| Dunham Fund | | | — | 1 | 2019 | $5,000 |