| Persinger Family Foundation | | Dakota Dunes, SD | Local | 7 | 2024 | $258,815 |
| Chesterman Family Foundation | | Sioux City, IA | Local | 7 | 2024 | $176,992 |
| Aalfs Family Foundation | | Sioux City, IA | Local | 7 | 2024 | $70,000 |
| Roth & Letch Family Charitable Foundation | | Dakota Dunes, SD | Local | 1 | 2024 | $50,000 |
| Missouri River Historical Develop- Ment Inc | | Sioux City, IA | Local | 3 | 2024 | $25,500 |
| Ronald B and Joan B Krage Foundation | | Sioux City, IA | Local | 3 | 2024 | $2,031 |
| Great West Casualty Company Foundation | | S Sioux City, NE | Local | 1 | 2024 | $500 |
| Elizabeth Firestone Graham Foundation 6842028200 | | New York, NY | National | 1 | 2023 | $25,000 |
| Humanities Iowa | | Ames, IA | Local | 1 | 2023 | $10,000 |
| Berenstein Family Foundation | | Sioux City, IA | Local | 3 | 2023 | $900 |
| Jane Bekins Meginnis Foundation % Richard Kunz | | | National | 4 | 2022 | $6,350 |
| Goldstein Family Foundation | | Bettendorf, IA | Local | 1 | 2022 | $1,000 |
| Margaret Martin Everist Foundation Tr | | Sioux City, IA | Local | 2 | 2021 | $135,000 |
| Tigger & Irving Jensen Foundation | | Sioux City, IA | Local | 1 | 2021 | $1,500 |
| Bob & Ginny Peterson Foundation | | Dakota Dunes, SD | Local | 3 | 2020 | $3,000 |
| Junior League of Sioux City | | Sioux City, IA | — | 1 | 2018 | $40,000 |
| Gleeson Foundation | | Sioux City, IA | Local | 1 | 2018 | $20,000 |