| Garden Club Federation of Massachusetts IncGroton | Form 990-N | No figure |
| Kestrel Land Trust IncAmherst | Form 990-N | No figure |
| Garden Club Federation of Massachusetts IncReading | Form 990-N | No figure |
| Garden Club Federation of Massachusetts IncHarvard | Form 990-N | No figure |
| Garden Club Federation of Massachusetts IncWestborough | Form 990-N | No figure |
| Garden Club Federation of Massachusetts IncDuxbury | Form 990-N | No figure |
| Garden Club Federation of Massachusetts IncNatick | Form 990-N | No figure |
| Garden Club Federation of Massachusetts IncTewksbury | Form 990-N | No figure |
| Alford Land Trust IncAlford | Form 990-N | No figure |
| Watsan Action IncBedford | Form 990-N | No figure |
| Weir River Watershed Association IncHull | Form 990-N | No figure |
| Friends of Newburyport Trees IncNewburyport | Form 990-N | No figure |
| Lenox Land Trust IncorporatedLenox | Form 990-N | No figure |
| Rutland Land Conservancy IncRutland | Form 990-N | No figure |
| Meetinghouse Farm IncWest Barnstable | Form 990-N | No figure |
| Garden Club Federation of Massachusetts IncMillis | Form 990-N | No figure |
| Garden Club Federation of Massachusetts IncQuincy | Form 990-N | No figure |
| Friends of Prospect Park IncShrewsbury | Form 990-N | No figure |
| Pembroke Watershed AssociationPembroke | Form 990-N | No figure |
| Garden Club Fedration of Massachusetts IncNorth Marshfield | Form 990-N | No figure |
| National Wind Watch IncPittsfield | Form 990-N | No figure |
| Keep Springfield Beautiful IncSpringfield | Form 990-N | No figure |
| Ravenwood Freedom Farm and Learning CenterPlainfield | Form 990-N | No figure |
| Garden Club Federation of Massachusetts IncNahant | Form 990-N | No figure |
| New England Chapter of the Society for Ecological RestorationWellfleet | Form 990-N | No figure |
| Nipmuck Quaboag Preservation Trust IncEast Brookfield | Form 990-N | No figure |
| Cushing Pond Preservation GroupHingham | Form 990-N | No figure |
| Lewis Bay Research Center IncSouth Yarmouth | Form 990-N | No figure |
| Coonamessett River Trust IncFalmouth | Form 990-N | No figure |
| Wingaersheek Research Institute IncGloucester | Form 990-N | No figure |
| Friends of H R A IncHolland | Form 990-N | No figure |
| Friends of Prospect Lake IncGreat Barrington | Form 990-N | No figure |
| Garden Club Federation of Massachusetts IncQuincy | Form 990-N | No figure |
| Garden Club Fedration of Massachusetts IncMarblehead | Form 990-N | No figure |
| Giving Green IncWinchester | Form 990-N | No figure |
| Friends of Wompatuck State ParkHingham | Form 990-EZ | $0FY2025 |
| Friends of Wachusett Mountain IncPrinceton | Form 990-N | No figure |
| Indian Ponds AssociationMarstons Mills | Form 990-N | No figure |
| The Box Pond Association IncorporatedBellingham | Form 990-N | No figure |
| Winchendon Springs Lake Association IncWinchendon | Form 990-N | No figure |
| Friends of Halibut Point State ParkRockport | Form 990-N | No figure |
| Naturalists ClubSpringfield | Form 990-N | No figure |
| Chebacco Lake AssociationSouth Hamilton | Form 990-N | No figure |
| Lake Boon Improvement Association IncStow | Form 990-N | No figure |
| Garden Club Federation of Massachusetts IncLittleton | Form 990-N | No figure |
| Dedham Land Trust IncDedham | Form 990-N | No figure |
| Massachusetts Watershed Coalition Inc -MWC-Leominster | Form 990-N | No figure |
| Fairhaven Land Preservation Trust IncFairhaven | Form 990-N | No figure |
| Friends of Parker River Natioal Wildlife Refuge IncNewburyport | Form 990-N | No figure |
| Garden Club Federation of Massachusetts IncMedfield | Form 990-N | No figure |