| North Branch Land TrustDallas | Form 990 | $603,003FY2025 |
| Lower Susquehanna Riverkeeper AssociationWrightsville | Form 990 | $587,718FY2024 |
| The Great Allegheny Passage ConservancyHomestead | Form 990 | $581,182FY2024 |
| National Network of Abortion FundsPittsburgh | Form 990 | $580,048FY2025 |
| Perry Square AllianceErie | Form 990 | $578,570FY2024 |
| Friends of Briar BushAbington | Form 990 | $571,637FY2025 |
| Fern Hollow Nature Center IncSewickley | Form 990 | $568,138FY2024 |
| Trout UnlimitedLancaster | Form 990 | $533,997FY2026 |
| Westmoreland Land TrustLatrobe | Form 990 | $529,642FY2025 |
| Pennsylvania Water Environment AssociationHarrisburg | Form 990 | $517,767FY2024 |
| F MinusArdmore | Form 990 | $514,917FY2024 |
| Ruffed Grouse SocietyPittsburgh | Group return | $512,954FY2024 |
| Professional Recyclers of PennsylvaniaHarrisburg | Form 990 | $506,566FY2024 |
| Wildlife Information Center IncSlatington | Form 990 | $487,049FY2025 |
| Living Water Environmental FoundationShohola | Form 990 | $474,349FY2025 |
| Discovery PathwaysPhiladelphia | Form 990 | $471,426FY2025 |
| Eastern Pennsylvania Coalition for Abandoned Mine ReclamationAshley | Form 990 | $449,921FY2024 |
| Endless Mountains Heritage Region IncWyalusing | Form 990 | $437,332FY2025 |
| The Experimental Farm Network CooperativePhiladelphia | Form 990 | $418,328FY2024 |
| Grounded StrategiesPittsburgh | Form 990 | $413,710FY2024 |
| Friends of Churchville Nature CenterChurchville | Form 990 | $410,111FY2025 |
| Independence Conservancy IncIndustry | Form 990 | $394,362FY2025 |
| Resource ExchangePhiladelphia | Form 990 | $389,724FY2025 |
| Strawberry Hill Foundation IncFairfield | Form 990 | $380,658FY2024 |
| Wildlife Leadership AcademyLock Haven | Form 990 | $372,967FY2024 |
| Reforest Our FutureBeaver | Form 990 | $370,424FY2024 |
| Susquehanna Greenway PartnershipLewisburg | Form 990 | $362,689FY2024 |
| Honey Hollow Nature CenterNew Hope | Form 990 | $361,257FY2025 |
| Friends of the Rail ParkPhiladelphia | Form 990 | $337,884FY2025 |
| Eastern Penna Alliance for Clean TransportationAuburn | Form 990 | $332,353FY2025 |
| Bucks County Horse ParkRevere | Form 990 | $326,817FY2025 |
| Chester Residents Concerned for Quality LivingCrum Lynne | Form 990 | $326,407FY2024 |
| Babb Creek Watershed Association IncMontoursville | Form 990 | $323,474FY2025 |
| Green Amendments for the GenerationsBristol | Form 990 | $310,360FY2024 |
| Willow Creek Snowmobile Club IncBradford | Form 990 | $308,855FY2025 |
| Tinicum ConservancyErwinna | Form 990 | $302,695FY2024 |
| Conemaugh Valley Conservancy IncJohnstown | Form 990 | $301,843FY2025 |
| Penns Valley Conservation AssocMillheim | Form 990 | $300,591FY2024 |
| Community Partnerships Resource Conservation and Development CouncLewistown | Form 990 | $292,251FY2025 |
| Friends of the Delaware Canal IncNew Hope | Form 990 | $289,932FY2025 |
| Save Alliance FoundationPottstown | Form 990 | $287,412FY2024 |
| Western Pennsylvania Coalition for Abandoned Mine ReclamationLigonier | Form 990 | $282,026FY2024 |
| Rachel Carson Trails ConservancyWexford | Form 990 | $278,602FY2025 |
| The Buck Hill Conservation FoundationBuck Hill Falls | Form 990 | $277,561FY2025 |
| Pennsylvania Interfaith Power & LightLancaster | Form 990 | $271,190FY2024 |
| Sunburys Revitalization IncSunbury | Form 990 | $268,166FY2024 |
| Friends of Silver Lake Nature CenterBristol | Form 990 | $268,062FY2025 |
| Eagles Mere ConservancyEagles Mere | Form 990 | $266,973FY2025 |
| Temple Special Services DistrictPhiladelphia | Form 990 | $260,000FY2023 |
| Capital Area Greenbelt AssociationHarrisburg | Form 990 | $258,747FY2024 |