| Shady Valley PTOMenomonee Falls | Form 990-EZ | $51,538FY2026 |
| Hudson Prairie PTO LtdHudson | Form 990-EZ | $51,262FY2026 |
| Dream Flight USA FoundationWausau | Form 990-EZ | $51,050FY2025 |
| Camp Awesum IncSaint Germain | Form 990-EZ | $50,663FY2025 |
| Mukwonago Fine Arts Booster IncMukwonago | Form 990-EZ | $50,037FY2025 |
| Riverview PTOSilver Lake | Form 990-EZ | $50,008FY2025 |
| Aviation Women Inspiring Next Generation IncMount Pleasant | Form 990-N | No figure |
| Wisconsin Connections Academy IncAppleton | Form 990-N | No figure |
| Waukesha North High School Boosterclub IncWaukesha | Form 990-EZ | $49,245FY2025 |
| Logan Booster ClubLa Crosse | Form 990-EZ | $48,981FY2025 |
| Parent Booster USA IncMinocqua | Form 990-EZ | $48,841FY2025 |
| Marcy PTOMenomonee Falls | Form 990-EZ | $48,793FY2026 |
| Black Hawk Riders Snowmobile Club IncorporatedSouth Wayne | Form 990-N | No figure |
| Wisconsin State Telecommunicatons Foundation IncMonona | Form 990-N | No figure |
| Yahara Community ClubEdgerton | Form 990-EZ | $46,999FY2025 |
| Firebird Foundation IncMinocqua | Form 990-EZ | $46,453FY2025 |
| Cashton Scholarship Foundation IncCashton | Form 990-N | No figure |
| Northwestern Elementary PTOPoplar | Form 990-EZ | $45,841FY2026 |
| Friends of the Kaukauna Public LibraryKaukauna | Form 990-N | No figure |
| Stoughton Sports Boosters IncStoughton | Form 990-N | No figure |
| Summit School PTOOconomowoc | Form 990-EZ | $44,849FY2026 |
| Tristate Thoracic SocietyHartland | Form 990-N | No figure |
| Hartford Energizers Dance Team Booster Club IncHartford | Form 990-EZ | $44,039FY2025 |
| Kiel Educational Endowment Fund IncKiel | Form 990-N | No figure |
| Learning CollaborativeOshkosh | Form 990-N | No figure |
| Kiel High School Booster ClubKiel | Form 990-EZ | $43,532FY2025 |
| Parent Booster USA IncWilmot | Form 990-EZ | $43,146FY2025 |
| Wise Resources IncWausau | Form 990-N | No figure |
| Viroqua Area Athletic Booster Club IncViroqua | Form 990-EZ | $42,640FY2025 |
| Parent Advocates for Performing Arts in Our SchoolsBeloit | Form 990-N | No figure |
| Oshkosh West Booster Club IncOshkosh | Form 990-EZ | $42,041FY2025 |
| Shorewood Hills Elementary School PTO IncMadison | Form 990-N | No figure |
| Star Education FoundationSaint Croix Falls | Form 990-N | No figure |
| Hilbert Wolves Athletic Booster Club IncHilbert | Form 990-EZ | $41,385FY2025 |
| Hamilton School District Band Boosters AssociationSussex | Form 990-EZ | $41,360FY2025 |
| Friends of the Sparta Free LibrarySparta | Form 990-N | No figure |
| Appleton Abc Program IncAppleton | Form 990-N | No figure |
| Summit View Parent Teacher OrganizationWaukesha | Form 990-EZ | $39,690FY2025 |
| Metropolitan Milwaukee Alliance of Black School EducatorsMilwaukee | Form 990-EZ | $39,652FY2025 |
| Hartland-Lakeside Education FoundationHartland | Form 990-EZ | $39,459FY2026 |
| PWHS Athletic Booster ClubPort Washington | Form 990-EZ | $38,900FY2026 |
| Germantown Hornets Wrestling Club IncMenomonee Falls | Form 990-N | No figure |
| Alumni Foundation of Calvery Lutheran Chapel Madison WI IncAppleton | Form 990-N | No figure |
| Parent Booster USA IncKenosha | Form 990-N | No figure |
| Greendale Panther Athletic Booster ClubGreendale | Form 990-N | No figure |
| Manitowoc Professional Police Association IncManitowoc | Form 990-N | No figure |
| Dasil Inc Dba Dermatologic & Aesthetic Surgery International LeMilwaukee | Form 990-N | No figure |
| Elm Lawn Parent Teacher Organization IncMiddleton | Form 990-N | No figure |
| Friends of the West Bend Community Memorial LibraryWest Bend | Form 990-N | No figure |
| Pulaski Community Schools Music BoostersPulaski | Form 990-EZ | $36,391FY2025 |