| Lake Central Education Foundation IncSaint John | Form 990-EZ | $57,481FY2025 |
| Wabash Area Lifetime Learning Association IncWest Lafayette | Form 990-EZ | $57,335FY2025 |
| North Harrison Band Boosters IncRamsey | Form 990-EZ | $56,978FY2025 |
| Speedway Parents & TeachersSpeedway | Form 990-EZ | $56,616FY2025 |
| Greenville Elementary PTO IncGreenville | Form 990-EZ | $56,580FY2025 |
| Avon High School Sports Booster Club IncAvon | Form 990-EZ | $56,477FY2025 |
| Welchcorp Vocational Training IncorporatedBrownsburg | Form 990-EZ | $55,615FY2025 |
| Bittersweet Elementary PTO IncMishawaka | Form 990-EZ | $55,343FY2025 |
| Homeschool Life Adventures IncHarlan | Form 990-EZ | $54,958FY2024 |
| Pulaski County Public Library FoundationWinamac | Form 990-EZ | $54,752FY2025 |
| Alpha Kappa Lambda Education Foundation IncCarmel | Form 990-EZ | $54,566FY2024 |
| Isenhower Family Education Fund IncLebanon | Form 990-EZ | $54,486FY2024 |
| Ernest R Elliott Parent-Teacher OrganizationMunster | Form 990-EZ | $54,482FY2025 |
| Italian American Heritage Society of Notre Dame Michiana IncSouth Bend | Form 990-EZ | $54,276FY2025 |
| Carey Ridge Elementary PTO IncWestfield | Form 990-EZ | $54,035FY2026 |
| Alex Rust Memorial Fund IncSeymour | Form 990-EZ | $53,994FY2024 |
| Sce Parent Teacher Organization IncFishers | Form 990-EZ | $53,601FY2026 |
| Parent Booster USA IncEvansville | Form 990-EZ | $52,968FY2025 |
| Indianapolis Liederkranz IncIndianapolis | Form 990-EZ | $52,933FY2025 |
| Southport Adult Athletic Booster ClubIndianapolis | Form 990-EZ | $52,896FY2023 |
| Sugar Creek Elementary PTO of New PalestineNew Palestine | Form 990-EZ | $52,839FY2025 |
| Fellowship of American Baptist MusiciansColumbus | Form 990-EZ | $52,593FY2025 |
| Lake Street Elementary School PTOCrown Point | Form 990-EZ | $52,186FY2026 |
| Borden Braves Foundation LtdBorden | Form 990-EZ | $51,626FY2025 |
| Castle High School Senior Scholarship Fund IncNewburgh | Form 990-EZ | $51,367FY2025 |
| Jerry Ross Elementary PTOCrown Point | Form 990-EZ | $51,183FY2025 |
| Heavilin Elementary Parent and Teacher OrganizationValparaiso | Form 990-EZ | $51,127FY2025 |
| Future Aviators Charitable Foundation IncCarmel | Form 990 | $50,831FY2025 |
| Bayan Educational Endeavor IncCarmel | Form 990-EZ | $50,537FY2025 |
| Clay Middle School Parent Teacher OrganizationCarmel | Form 990-EZ | $50,266FY2025 |
| Helpings of Hope IncWestfield | Form 990-EZ | $50,085FY2025 |
| Hazel Dell Parent-Teacher OrganizationNoblesville | Form 990-EZ | $50,068FY2025 |
| Union Elementary Parent Teacher Organization IncorporatedZionsville | Form 990-EZ | $49,686FY2025 |
| Mt Vernon Choir and Theatre Booster Club LtdFortville | Form 990-EZ | $49,148FY2025 |
| 5010 Boosters IncFishers | Form 990-N | No figure |
| Tiger Pride IncLawrenceburg | Form 990-EZ | $48,725FY2025 |
| Chesterton High School Football BoostersChesterton | Form 990-EZ | $48,197FY2025 |
| Pilgrim InstituteMishawaka | Form 990-EZ | $48,066FY2025 |
| New Palestine Elementary PTONew Palestine | Form 990-EZ | $48,042FY2025 |
| Perry Meridian Falcon Boosters IncIndianapolis | Form 990-N | No figure |
| Trades for TomorrowMount Vernon | Form 990-N | No figure |
| Portage Township Music Boosters IncPortage | Form 990-N | No figure |
| Stony Creek Elementary School PTONoblesville | Form 990-EZ | $47,260FY2026 |
| Floyd Central PTO RenaissanceFloyds Knobs | Form 990-N | No figure |
| Tell City Band Boosters IncTell City | Form 990-EZ | $46,244FY2026 |
| Lake County Right to Life Education FundGriffith | Form 990-N | No figure |
| Emerging Entrepreneurs of Wabash Valley IncTerre Haute | Form 990-N | No figure |
| Indianapolis Press Club Foundation IncIndianapolis | Form 990 | $45,494FY2024 |
| Boone Meadow Parent Teacher OrganizationWhitestown | Form 990-EZ | $45,431FY2025 |
| Maple Grove Parent Teachers OrganizationBargersville | Form 990-EZ | $44,907FY2025 |