| Friends of Bellevue State Park IncBellevue | Form 990-N | No figure |
| Millers Bay ConservancyMilford | Form 990-N | No figure |
| Networked Transmission Systems IncMount Vernon | Form 990-N | No figure |
| Sunshine Garden Club of Winterset IowaVan Meter | Form 990-N | No figure |
| Operation 11th HourIndependence | Form 990-N | No figure |
| Rhino Momma IncorporatedLone Rock | Form 990-N | No figure |
| Friends of the Hampton Tree BoardHampton | Form 990-N | No figure |
| Central Iowa Daylily SocietyCedar Falls | Form 990-N | No figure |
| Plymouth Betterment Committee IncPlymouth | Form 990-N | No figure |
| Dickinson County Conservation Endowment IncLake Park | Form 990-N | No figure |
| Pollinator Alliance of the HeartlandCouncil Bluffs | Form 990-N | No figure |
| The Federated Garden Clubs of Iowa IncBaxter | Form 990-N | No figure |
| The Federated Garden Clubs of IowaGowrie | Form 990-N | No figure |
| The Federated Garden Clubs of Iowa IncNorthwood | Form 990-N | No figure |
| The Federated Garden Clubs of Iowa IncCedar Rapids | Form 990-N | No figure |
| The Federated Garden Clubs of Iowa IncNorwalk | Form 990-N | No figure |
| The Federated Garden Clubs of Iowa IncDecorah | Form 990-N | No figure |
| The Federated Garden Clubs of Iowa IncKeosauqua | Form 990-N | No figure |
| The Federated Garden Clubs of Iowa IncTipton | Form 990-N | No figure |
| The Federated Garden Clubs of Iowa IncAfton | Form 990-N | No figure |
| The Federated Garden Clubs of Iowa IncLe Mars | Form 990-N | No figure |
| The Federated Garden Clubs of Iowa IncMuscatine | Form 990-N | No figure |
| Lake City Food Pantry CorpLake City | Form 990-N | No figure |
| Big River Conservationists IncDavenport | Form 990-N | No figure |
| Cerro Gordo Clean Energy DistrictClear Lake | Form 990-N | No figure |
| Plant WashingtonWashington | Form 990-N | No figure |
| Fisher Lake Wildlife PreserveDes Moines | Form 990-N | No figure |
| Iowa Energy FundWest Des Moines | Form 990-N | No figure |
| PKW & SK CharitiesMaquoketa | Form 990-N | No figure |
| Coralx Foundation IncCedar Falls | Form 990-N | No figure |
| Young Minds Mission FoundationWest Des Moines | Form 990-N | No figure |
| Natural Law TrustFairfield | Form 990-N | No figure |
| Zoo Garden at Weed ParkMuscatine | Form 990-N | No figure |
| Repurpose RisingDes Moines | Form 990-N | No figure |
| Love Your Neighbor FarmSolon | Form 990-N | No figure |
| Friends of Morris ParkKeosauqua | Form 990-N | No figure |
| Prairie Fire FoundationIowa City | Form 990-N | No figure |
| Friends of Greene County Iowa ParksRippey | Form 990-N | No figure |
| Actgreen Impact FundBuffalo Center | Form 990-N | No figure |
| Appanoose Conservation FoundationCenterville | Form 990 | -$22,990FY2025 |
| The Foundation of Environmental ImprovementFairfield | None required | No figure |
| Iowa Climbers CoalitionIowa City | Form 990-N | No figure |
| Miller Boys Keeping the Christmas Spirit Alive IncWest Union | Form 990-N | No figure |
| Des Moines County Energy DistrictBurlington | Form 990-N | No figure |
| Eastern Iowa Outdoors Foundation IncAnamosa | Form 990 or 990-EZ | No figure |
| Lifesource FoundationIowa City | Form 990 or 990-EZ | No figure |
| Friends of Norwalk ParksNorwalk | Form 990-N | No figure |
| Peace Corner CommunityCedar Rapids | Form 990-N | No figure |
| Life Light AfricaDes Moines | Form 990-N | No figure |
| Compost Disposal ServicesOelwein | Form 990-N | No figure |