| National Opinion Research CenterChicago | Form 990 | $397,190,163FY2024 |
| American Institute of Indian Studies University of ChicagoOakbrook Terrace | Form 990 | $4,510,756FY2025 |
| The Policy Circle CoWilmette | Form 990 | $3,566,182FY2025 |
| Shared-Use Mobility CenterChicago | Form 990 | $3,043,688FY2025 |
| Asian Americans Advancing Justice - ChicagoChicago | Form 990 | $2,226,415FY2025 |
| Institute for Political InnovationChicago | Form 990 | $1,919,623FY2024 |
| Real Clear Media FundNorthbrook | Form 990 | $762,336FY2024 |
| National Organization of Research Development ProfessionalsOakbrook Terrace | Form 990 | $671,026FY2025 |
| US Council of Muslim OrganizationsBridgeview | Form 990 | $530,406FY2024 |
| Lithuanian Research & Studies Center IncLemont | Form 990 | $463,341FY2025 |
| Employment Research & Development InstituteWilmette | Form 990 | $219,168FY2024 |
| North American Institute for Mexican Advancement NFPMelrose Park | Form 990-EZ | $182,291FY2025 |
| CQLC NFPChicago | Form 990-EZ | $160,497FY2025 |
| Bridges to Prosperity Northern IllinoisRockford | Form 990-EZ | $158,849FY2025 |
| International Visual Sociology Association IncChicago | Form 990-EZ | $106,316FY2025 |
| Foundation for International Jungian Psychoanalytic Training ZuGlencoe | Form 990-EZ | $81,974FY2024 |
| Law and Civics Literacy InstituteChicago | Form 990-EZ | $80,000FY2025 |
| International Academy of Dispute ResolutionBarrington | Form 990-EZ | $58,160FY2024 |
| Academy of Leisure SciencesChampaign | Form 990-N | No figure |
| Women Solidarity Association of TogoElmwood Park | Form 990-N | No figure |
| Geographic Society of ChicagoChicago | Form 990-N | No figure |
| Macro-Finance SocietyChicago | Form 990-N | No figure |
| Working Womens History ProjectChicago | Form 990-N | No figure |
| The Chicago Illinois Chapter of the American Research Center in EgyptChicago | Form 990-N | No figure |
| Chicago Justice ProjectChicago | Form 990-N | No figure |
| Institute for Cognitive LiteracynfpChicago | Form 990-N | No figure |
| Lithuanian Research & Studies Center IncLemont | Form 990-N | No figure |
| Lithuanian Research & Studies Center IncLemont | Form 990-N | No figure |
| US Marxist-HumanistsChicago | Form 990-N | No figure |
| Promise Labs Africa NFPCarbondale | Form 990-N | No figure |
| National Council for Geocosmic Research IncChicago | Form 990-N | No figure |
| Illinois Coalition of Family Based TreatmentChicago | Form 990-N | No figure |
| Monee Historical SocietyMonee | Form 990-N | No figure |
| Comparative Constitutions ProjectChicago | Form 990-N | No figure |
| Association of Middle East Womens StudiesChicago | Form 990-N | No figure |
| Coalition of Black Trade Unionists Joliet ChapterJoliet | Form 990-N | No figure |
| Lithuanian Research and Studies Center IncLemont | Form 990-N | No figure |
| Green Harvest ProjectSpringfield | Form 990-N | No figure |
| Penn USA IncPalatine | Form 990-N | No figure |
| New Human Research & Development InstituteChicago | Form 990-N | No figure |
| International Association of Autoethnography and Narrative InquChicago | Form 990-N | No figure |
| Aza EssentialsBartlett | Form 990-N | No figure |
| The MVMNTBeecher | Form 990-N | No figure |
| Chicago Chinese Social Research Group NFPChicago | Form 990-N | No figure |
| Projects 2 Pinnacle FoundationEast Saint Louis | Form 990-N | No figure |
| Subsistence MarketplacesChampaign | Form 990-N | No figure |
| Noorussabah Islamic CharitiesGlendale Heights | Form 990-N | No figure |
| Great Lakes Archaeological Research and Archival InstituteVernon Hills | Form 990-N | No figure |
| Nailology 350Joliet | Form 990-N | No figure |
| Heal on Purpose IncChicago | Form 990-N | No figure |