| McKinley Elementary School Parent Teacher OrganizationWauwatosa | Form 990-N | No figure |
| Hamilton Athletic Booster ClubSussex | Form 990-EZ | $36,038FY2026 |
| Gibson Walsh 20 FoundationHayward | Form 990-EZ | $36,036FY2024 |
| EmpowherMilwaukee | Form 990-N | No figure |
| PFM Educational & Scholastic Foundation IncBrookfield | Form 990-EZ | $35,801FY2025 |
| Cottage Grove Schools Parent Teacher OrganizationCottage Grove | Form 990-EZ | $35,597FY2025 |
| Stone Gate ResourcesSaukville | Form 990-N | No figure |
| Douglas County Fish and Game League IncSuperior | Form 990-EZ | $35,561FY2025 |
| Kevin Pope Memorial Foundation IncEdgerton | Form 990-N | No figure |
| Thoreau Elementary PTO IncMadison | Form 990-N | No figure |
| Thorson Elementary School PTO IncCedarburg | Form 990-EZ | $34,889FY2025 |
| Oregon Lacrosse ClubBrooklyn | Form 990-N | No figure |
| Mequon-Theinsville Area Council Parent Teacher OrganizationMequon | Form 990-EZ | $34,519FY2025 |
| Friends of MHS Music MakersMuskego | Form 990-EZ | $34,480FY2025 |
| Wildlands School IncAugusta | Form 990-EZ | $34,341FY2025 |
| Insight Life Learning InstituteBrookfield | Form 990 | $34,036FY2024 |
| Potosi Fine Arts ClubPotosi | Form 990-N | No figure |
| Eagle Bluff Elementary PTO IncOnalaska | Form 990-N | No figure |
| Salem Grade School PTO IncSalem | Form 990-EZ | $32,719FY2025 |
| German Immersion FoundationMilwaukee | Form 990-N | No figure |
| Prairie Lane Elementary PTOPleasant Prairie | Form 990-EZ | $29,995FY2025 |
| West Bend Public Schools FoundationincWest Bend | Form 990-N | No figure |
| Driftless Region Youth Flight IncLa Crosse | Form 990-N | No figure |
| North Shore Library Foundation IncGlendale | Form 990-N | No figure |
| Alano Society IncMadison | Form 990-N | No figure |
| Dane County Dairy Promotion Committee IncBelleville | Form 990-EZ | $26,998FY2025 |
| Evansville Education Foundation IncEvansville | Form 990-N | No figure |
| Edgewood Home and School Association IncGreenfield | Form 990-N | No figure |
| Cops and Kids Foundation IncSussex | Form 990-N | No figure |
| DC Everest Mountain Bay Elementary PTO IncWausau | Form 990-N | No figure |
| Tosa Tonight IncWauwatosa | Form 990-EZ | $25,673FY2025 |
| Southwest High School Booster Club IncGreen Bay | Form 990-EZ | $25,597FY2025 |
| Parent Booster USA IncTrevor | Form 990-EZ | $25,463FY2026 |
| Nicolet Booster ClubGlendale | Form 990-N | No figure |
| Initiative on Islam and MedicineBrookfield | Form 990-N | No figure |
| Western Fraternal Life Association Education & Charitable FoundationMadison | Form 990-N | No figure |
| Sturgeon Bay Booster Club IncSturgeon Bay | Form 990-N | No figure |
| Kenosha Band Boosters IncKenosha | Form 990-N | No figure |
| Grelton Conservation Club IncJohnson Creek | Form 990-EZ | $25,055FY2024 |
| Lake Mills Rotary Foundation IncLake Mills | Form 990-N | No figure |
| Columbus Quarterback Club IncColumbus | Form 990-N | No figure |
| Chippewa Valley Bee ExpoStanley | Form 990-N | No figure |
| Mequon-Theinsville Area Council Parent Teacher OrganizationMequon | Form 990-EZ | $22,114FY2025 |
| Friends of the Brandon Public LibraryBrandon | Form 990-N | No figure |
| Marine Corps Reserve Association Education TrustDe Pere | Form 990-N | No figure |
| Team Harmony PTOJanesville | Form 990-EZ | $21,303FY2026 |
| Otis Green Foundation IncFontana | Form 990-N | No figure |
| Whitefish Bay Middle School Parent Teacher Organization IncWhitefish Bay | Form 990-N | No figure |
| ChallengeusaWatertown | Form 990-N | No figure |
| Norsemen Booster Club IncWestby | Form 990-EZ | $19,065FY2021 |