| Wyss Center for Innovation IncWashington | Form 990-N | No figure |
| North Lincoln Park Neighborhood AssociationWashington | Form 990-N | No figure |
| Atomic Heritage FoundationWashington | Form 990-N | No figure |
| Hill East Community GardenWashington | Form 990-N | No figure |
| Parents for Nontoxic AlternativesWashington | Form 990-N | No figure |
| Ageing in Place Resource Center IncWashington | Form 990-N | No figure |
| District of Columbia Environmental Education ConsortiumWashington | Form 990-N | No figure |
| The Friends of Francis FieldWashington | Form 990-N | No figure |
| Friends of the Tenth Street ParkWashington | Form 990-N | No figure |
| CRT Group FoundationWashington | Form 990-N | No figure |
| EcowomenWashington | Form 990-N | No figure |
| Runway to GreenWashington | Form 990-N | No figure |
| Perennial Garden ClubWashington | Form 990-N | No figure |
| National Center for Sustainable Development IncWashington | Form 990-N | No figure |
| District of Columbia Green Spaces AllianceWashington | Form 990-N | No figure |
| District of Columbia Green Spaces AllianceWashington | Form 990-N | No figure |
| Applied Ecology for Tropical Resources Program IncWashington | Form 990-N | No figure |
| National Capital Region Section of the American Water Resources AsscWashington | Form 990-N | No figure |
| Friends of Montrose ParkWashington | Form 990-N | No figure |
| Common Sense MobilityWashington | Form 990-N | No figure |
| Openvega FoundationWashington | Form 990-N | No figure |
| Triangle Community Garden Land TrustWashington | Form 990-N | No figure |
| Restore Mass AveWashington | Form 990-N | No figure |
| Emeraldplanet International FoundationWashington | Form 990-N | No figure |
| Greenseed Community Garden Land TrustWashington | Form 990-N | No figure |
| Pangea CoalitionWashington | Form 990-N | No figure |
| Friends of Petworth ParkWashington | Form 990-N | No figure |
| CleanpeaceWashington | Form 990-N | No figure |
| Goelectricdrive FoundationWashington | Form 990-N | No figure |
| Ocean Doctor IncWashington | None required | $0FY2024 |
| Simply SustainedWashington | Form 990-N | No figure |
| Mamie D Lee Garden AssociationWashington | Form 990-N | No figure |
| Center for Urban Sustainability ProjectsWashington | Form 990-N | No figure |
| Friends of Theodore Roosevelt Island IncWashington | Form 990-N | No figure |
| Greater Brookland Garden ClubWashington | Form 990-N | No figure |
| American Society for Public AdministrationWashington | Form 990-N | No figure |
| Climate InstituteWashington | Form 990-N | No figure |
| Earth Council Foundation - UsWashington | Form 990-N | No figure |
| Save Americas Forests Fund IncWashington | Form 990-N | No figure |
| Mycological Association of Washington IncWashington | Form 990-N | No figure |
| Trees for Capitol Hill IncWashington | Form 990-N | No figure |
| Capitol Hill Community Garden Land TRWashington | Form 990-N | No figure |
| Friends of the Book Hill ParkWashington | Form 990-N | No figure |
| DC Bird AllianceWashington | Form 990-N | No figure |
| Scenic Georgia IncWashington | Form 990-N | No figure |
| Capitol Hill Garden Club IncWashington | Form 990-N | No figure |
| Gateway Research InstituteWashington | Form 990-N | No figure |
| Scenic Alabama IncWashington | Form 990-N | No figure |
| Green Field Community GardenWashington | Form 990-N | No figure |
| District of Columbia Green Spaces AllianceWashington | Form 990-N | No figure |