| Compatible Lands Foundation IncPryor | Form 990 | $24,629,833FY2024 |
| Land LegacyTulsa | Form 990 | $14,118,114FY2025 |
| Native Preservation CoTulsa | Form 990 | $6,590,000FY2024 |
| Myriad Gardens FoundationOklahoma City | Form 990 | $6,099,706FY2025 |
| Oklahoma Centennial Botanical Garden IncTulsa | Form 990 | $4,002,555FY2024 |
| Genesis ProjectJones | Form 990 | $2,702,655FY2025 |
| Oklahoma Association of Conservation Districts IncorporateOklahoma City | Form 990 | $2,379,289FY2024 |
| Oklahoma City Beautiful IncOklahoma City | Form 990 | $889,369FY2025 |
| Tulsa Garden Center IncTulsa | Form 990 | $631,479FY2024 |
| Waterislife Global IncBroken Arrow | Form 990 | $599,939FY2024 |
| Lake McMurtry Friends IncStillwater | Form 990 | $474,819FY2025 |
| Keep Oklahoma Beautiful IncOklahoma City | Form 990 | $469,018FY2025 |
| Tech-Now IncNorman | Form 990 | $424,638FY2025 |
| Oklahoma Energy Education FoundationOklahoma City | Form 990 | $347,340FY2024 |
| Local Enviromental Action Demanded Agency IncMiami | Form 990 | $277,875FY2024 |
| Tulsa Bike Share IncTulsa | Form 990 | $257,959FY2024 |
| Downtown MuskogeeMuskogee | Form 990 | $256,023FY2025 |
| Kingfisher Trails IncKingfisher | Form 990 | $236,754FY2025 |
| Oklahoma Sustainability Network AssociationOklahoma City | Form 990 | $200,000FY2024 |
| Oklahoma Floodplain Managers Association IncTulsa | Form 990-EZ | $196,019FY2025 |
| Electronic Synergy FoundationTulsa | Form 990-EZ | $176,332FY2024 |
| Master Gardener Foundation of Tulsa IncTulsa | Form 990 | $161,652FY2024 |
| Lendonwood Gardens IncGrove | Form 990-EZ | $128,866FY2024 |
| Institute for Environmental InnovationCoweta | Form 990 | $118,491FY2024 |
| Water Serve IncBethany | Form 990-EZ | $112,097FY2025 |
| Mary K Oxley Nature Center Association IncTulsa | Form 990-EZ | $111,265FY2024 |
| Pride in McAlester IncMcAlester | Form 990-EZ | $95,152FY2026 |
| Oklahoma Prescribed Burn AssociationStillwater | Form 990-EZ | $87,950FY2025 |
| Friends of Heavener Runestone LLCHeavener | Form 990-EZ | $87,154FY2024 |
| Friends of the Met IncTulsa | Form 990-EZ | $77,586FY2025 |
| The Greater Oklahoma City Parks and Trails Foundation IncOklahoma City | Form 990-EZ | $56,459FY2024 |
| Okra Oklahoma Recycling AssociationTulsa | Form 990-EZ | $53,008FY2024 |
| Wilderness Education AssociationStonewall | Form 990-N | No figure |
| Payne County Conservation Foundation IncStillwater | Form 990 | $32,686FY2026 |
| Tulsa Audubon Society IncTulsa | Form 990-N | No figure |
| High Plains Resource Conservation & Development AssociationBuffalo | Form 990-N | No figure |
| Ace Educational Foundation IncEdmond | Form 990-N | No figure |
| Friends of Grand Lake Audubon SocietyJay | Form 990-N | No figure |
| Cpasa IncTishomingo | Form 990-N | No figure |
| Carrie Dickerson FoundationTulsa | Form 990-N | No figure |
| Hellenic Foundation for the Preservation of Hist&Culture IncTulsa | Form 990-N | No figure |
| Oklahoma Orchid SocietyNorman | Form 990-N | No figure |
| Garden Lakes Wetlands ConservancyincOklahoma City | Form 990-N | No figure |
| Ozark Cave Diving AllianceBroken Arrow | Form 990-N | No figure |
| North American Wood Ape ConservancyOklahoma City | Form 990-N | No figure |
| Tulsa Community Garden AssociationincTulsa | Form 990-N | No figure |
| Cedar Lake Growth IncHinton | Form 990-N | No figure |
| Center for the Study of Carbon and Energy MarketsTulsa | Form 990-N | No figure |
| Garfield County Master GardenersEnid | Form 990-N | No figure |
| Oklahoma Invasive Plant CouncilNorman | Form 990-N | No figure |