| Access FundEIN 94-3131165 | Environment | CO | $2,707,760Small | 87.80 |
| American Alpine ClubEIN 13-1611981 | Environment | CO | $3,471,529Small | 73.05 |
| American Horticultural SocietyEIN 53-0226408 | Environment | VA | $2,954,031Small | 87.74 |
| American Public Gardens AssociationEIN 23-7110058 | Environment | PA | $2,276,779Small | 84.24 |
| Arboretum FoundationEIN 91-0613583 | Environment | WA | $1,228,490Small | 77.79 |
| Aspen Center for Environmental StudiesEIN 23-7042291 | Environment | CO | $2,368,811Small | 92.33 |
| Atlanta Beltline PartnershipEIN 56-2464486 | Environment | GA | $8,078,135Mid-sized | 80.18 |
| Audubon Canyon RanchEIN 94-6069140 | Environment | CA | $3,214,289Small | 86.74 |
| Audubon Naturalist SocietyEIN 53-0233715 | Environment | MD | $3,487,149Small | 90.15 |
| Austin Parks FoundationEIN 74-2648803 | Environment | TX | $6,512,481Mid-sized | 93.32 |
| Bernheim Arboretum and Research ForestEIN 61-0444651 | Environment | KY | $3,094,982Small | 87.30 |
| Blandford Nature CenterEIN 20-0739420 | Environment | MI | $1,358,816Small | 85.35 |
| Boston Harbor NowEIN 04-3268863 | Environment | MA | $2,524,291Small | 79.39 |
| Brooklyn Botanic GardenEIN 11-2417338 | Environment | NY | $22,441,961Large | 93.86 |
| California State Parks FoundationEIN 94-1707583 | Environment | CA | $8,274,117Mid-sized | 75.25 |
| Camden City Garden ClubEIN 22-2870647 | Environment | NJ | $940,194Small | 73.72 |
| Cape Fear Botanical GardenEIN 56-1673281 | Environment | NC | $1,887,631Small | 84.64 |
| Center for EcoliteracyEIN 94-2911417 | Environment | CA | $2,386,398Small | 88.26 |
| Central Park ConservancyEIN 13-3022855 | Environment | NY | $72,425,618Large | 94.20 |
| Chicago Botanic GardenEIN 36-2225482 | Environment | IL | $48,755,048Large | 88.85 |
| Cibolo Nature Center & FarmEIN 74-2564700 | Environment | TX | $3,672,517Mid-sized | 85.33 |
| Cincinnati Nature CenterEIN 31-6057978 | Environment | OH | $4,653,544Mid-sized | 77.13 |
| Cincinnati Parks FoundationEIN 31-1429016 | Environment | OH | $1,059,563Small | 89.02 |
| City Parks FoundationEIN 13-3561657 | Environment | NY | $20,273,100Large | 94.26 |
| Civic Garden Center of Greater CincinnatiEIN 31-0559893 | Environment | OH | $779,757Small | 79.83 |
| Cleveland Botanical GardenEIN 34-0239538 | Environment | OH | $7,054,254Mid-sized | 72.19 |
| Coastal Maine Botanical GardensEIN 01-0476545 | Environment | ME | $4,847,073Mid-sized | 85.71 |
| Conservancy for Cuyahoga Valley National ParkEIN 34-1917257 | Environment | OH | $4,242,928Mid-sized | 88.91 |
| Delaware Nature SocietyEIN 51-6018321 | Environment | DE | $4,326,285Mid-sized | 91.54 |
| Denison Pequotsepos Nature CenterEIN 06-0884024 | Environment | CT | $1,362,888Small | 76.92 |
| Denver Botanic GardensEIN 84-0440359 | Environment | CO | $21,365,255Large | 90.84 |
| Descanso Gardens Guild, Inc.EIN 95-2511202 | Environment | CA | $8,740,038Mid-sized | 89.78 |
| Desert Botanical GardenEIN 86-0136925 | Environment | AZ | $15,606,893Large | 83.88 |
| Discovery Green ConservancyEIN 20-1951465 | Environment | TX | $7,362,363Mid-sized | 94.07 |
| Earth ForceEIN 52-1830873 | Environment | CO | $1,002,263Small | 84.00 |
| EarthplaceEIN 06-0740523 | Environment | CT | $2,425,838Small | 85.32 |
| Fairchild Tropical Botanic GardenEIN 59-0668480 | Environment | FL | $8,735,589Mid-sized | 89.37 |
| Florida Oceanographic SocietyEIN 59-1114306 | Environment | FL | $1,649,436Small | 81.91 |
| Forest Park ForeverEIN 43-1427062 | Environment | MO | $8,071,854Mid-sized | 91.33 |
| Frederik Meijer Gardens & Sculpture FoundationEIN 38-3118579 | Environment | MI | $4,455,748Mid-sized | 91.46 |
| Frederik Meijer Gardens & Sculpture ParkEIN 38-2394044 | Environment | MI | $19,104,355Large | 90.50 |
| Friends of AcadiaEIN 01-0425071 | Environment | ME | $3,913,667Mid-sized | 93.37 |
| Friends of Great Smoky Mountains National ParkEIN 62-1564782 | Environment | NC | $2,509,667Small | 84.00 |
| Friends of the High LineEIN 31-1734086 | Environment | NY | $16,615,703Large | 84.33 |
| Friends of the National ArboretumEIN 52-1257712 | Environment | DC | $1,291,668Small | 92.93 |
| Friends of the Urban ForestEIN 94-2699528 | Environment | CA | $2,523,744Small | 86.32 |
| Fund for Park Avenue New YorkEIN 13-4061153 | Environment | NY | $1,093,811Small | 80.43 |
| Garfield Park Conservatory AllianceEIN 36-4200490 | Environment | IL | $1,410,897Small | 86.16 |
| GlynwoodEIN 13-3852957 | Environment | NY | $4,420,244Mid-sized | 89.85 |
| Golden Gate National Parks ConservancyEIN 94-2781708 | Environment | CA | $55,050,170Large | 90.38 |
| Grand Teton National Park FoundationEIN 83-0322668 | Environment | WY | $19,570,717Large | 98.23 |
| Great Meadow FoundationEIN 52-1257702 | Environment | VA | $1,975,821Small | 87.74 |
| Greater Des Moines Botanical GardenEIN 42-0540765 | Environment | IA | $3,254,731Small | 91.62 |
| Greater Newark ConservancyEIN 22-2691309 | Environment | NJ | $2,379,905Small | 92.75 |
| Harris Center for Conservation EducationEIN 23-7085105 | Environment | NH | $1,333,555Small | 92.22 |
| Hermann Park ConservancyEIN 76-0327389 | Environment | TX | $4,590,301Mid-sized | 93.81 |
| Hidden VillaEIN 94-1539836 | Environment | CA | $3,910,117Mid-sized | 97.13 |
| Houston Parks BoardEIN 74-1860046 | Environment | TX | $22,107,401Large | 94.34 |
| Huntsville Botanical GardenEIN 63-0800109 | Environment | AL | $4,048,002Mid-sized | 89.76 |
| Irvine Nature CenterEIN 52-1231286 | Environment | MD | $1,926,838Small | 90.75 |