| Alzheimers Disease and Related Disorders Association IncChicago | Form 990 | $457,244,898FY2025 |
| American Academy of Pediatrics IncItasca | Form 990 | $138,498,070FY2025 |
| American Lung AssociationChicago | Form 990 | $118,682,229FY2025 |
| Radiological Society of North America IncOak Brook | Form 990 | $68,473,609FY2025 |
| Muscular Dystrophy AssociationChicago | Form 990 | $64,160,032FY2025 |
| American Academy of Dermatology IncRosemont | Form 990 | $53,579,298FY2024 |
| American Academy of Orthopedic SurgeonsRosemont | Form 990 | $53,567,386FY2024 |
| AIDS Foundation of ChicagoChicago | Form 990 | $41,006,403FY2025 |
| American Osteopathic AssociationChicago | Form 990 | $35,774,516FY2025 |
| Chicago House and Social Service AgencyChicago | Form 990 | $26,435,859FY2025 |
| Congress of Neurological Surgeons Inc University of MichiganSchaumburg | Form 990 | $19,270,091FY2025 |
| American Society for Gastrointestinal EndoscopyDowners Grove | Form 990 | $16,594,758FY2025 |
| Families of SmaElk Grove Village | Form 990 | $15,213,970FY2025 |
| National Society to Prevent BlindnessChicago | Form 990 | $14,719,404FY2025 |
| American Association of Neurosurgeons IncRolling Meadows | Form 990 | $13,538,149FY2025 |
| American Society for Surgery of the HandChicago | Form 990 | $12,705,880FY2024 |
| American Epilepsy SocietyChicago | Form 990 | $11,878,127FY2025 |
| Alliance NCTN FoundationChicago | Form 990 | $10,906,644FY2024 |
| American Orthopaedic Society for Sports MedicineRosemont | Form 990 | $10,584,442FY2025 |
| International Council for Veterinary AssessmentChicago | Form 990 | $10,153,275FY2025 |
| Crosspoint Human ServicesDanville | Form 990 | $10,047,933FY2025 |
| Pulmonary Fibrosis FoundationChicago | Form 990 | $9,251,199FY2025 |
| American Academy of Dental Sleep MedicineLisle | Form 990 | $6,581,453FY2025 |
| Midwest Asian Health Association - MahaChicago | Form 990 | $6,004,483FY2025 |
| Association of Bone & Joint SurgeonsSchaumburg | Form 990 | $5,019,116FY2024 |
| American Orthopaedic AssociationRosemont | Form 990 | $4,939,397FY2024 |
| Pediatric Orthopaedic Society of North AmericaOak Brook | Form 990 | $4,770,697FY2025 |
| Wellness HouseHinsdale | Form 990 | $4,611,105FY2025 |
| The International Waldenstroms Macroglobulinemia Foundation IncChicago | Form 990 | $4,463,374FY2024 |
| Neurocritical Care Society IncChicago | Form 990 | $4,430,423FY2025 |
| American Association for the Surgery of TraumaChicago | Form 990 | $4,107,798FY2024 |
| SJL Health Systems IncDelavan | Form 990 | $3,687,001FY2022 |
| Illinois Telecommunications Access CorporationSpringfield | Form 990 | $3,526,689FY2024 |
| Joint Review Committee on Education in Radiologic TechnologyChicago | Form 990 | $3,391,291FY2025 |
| Health and Medicine Policy Research GroupChicago | Form 990 | $3,221,481FY2024 |
| Horizons for the Blind IncCrystal Lake | Form 990 | $3,141,887FY2025 |
| St Jude Runners AssociationPeoria | Form 990 | $2,956,648FY2024 |
| The American Laryngological Rhinological and OtologicalOak Brook | Form 990 | $2,953,010FY2025 |
| Society of Cardiovascular Anesthesiologists IncEast Dundee | Form 990 | $2,894,345FY2025 |
| Proactive Community ServicesHazel Crest | Form 990 | $2,700,444FY2024 |
| American Society of Pediatric Hematology/OncologySchaumburg | Form 990 | $2,655,340FY2024 |
| Cancer Wellness CenterNorthbrook | Form 990 | $2,620,283FY2025 |
| Eastern Association for the Surgery of TraumaChicago | Form 990 | $2,569,449FY2025 |
| Epilepsy Foundation of Greater Southern IllinoisBelleville | Form 990 | $2,471,318FY2025 |
| Imerman AngelsChicago | Form 990 | $2,420,333FY2024 |
| Center for Sight & HearingRockford | Form 990 | $2,088,672FY2025 |
| Violet Foundation for Pediatric Brain CancerCountryside | Form 990 | $2,073,887FY2024 |
| Mother and Child AllianceChicago | Form 990 | $2,003,314FY2025 |
| American Academy of Pediatric Dentistry FoundationChicago | Form 990 | $1,922,938FY2025 |
| Society of Abdominal RadiologyEast Dundee | Form 990 | $1,855,994FY2024 |