| Richard King Mellon Foundation Dtd 01-01-47 | | Ligonier, PA | Local | 5 | 2024 | $328,000 |
| Katherine Mabis Mckenna Foundation Inc | | Latrobe, PA | Local | 5 | 2024 | $204,000 |
| Tomahawk Hill Foundation | | Pittsburgh, PA | Local | 7 | 2024 | $153,000 |
| Nimick Forbesway Foundation | | Wilmington, DE | National | 4 | 2024 | $70,000 |
| R K Mellon Family Foundation | | Ligonier, PA | National | 5 | 2024 | $37,500 |
| Anne L & George H Clapp Charitable & Educational Trust | | Pittsburgh, PA | Local | 3 | 2024 | $25,000 |
| Edwin Hodge Jr Trust Ua 07-29-81 Fbo Emma Clyde Hodge 39510-0 | | Pittsburgh, PA | National | 5 | 2024 | $12,000 |
| Summit Foundation | | Pittsburgh, PA | Local | 5 | 2024 | $10,000 |
| Frances H & Harold E Gordon Charitable Foundation | | Wilmington, DE | Local | 2 | 2024 | $10,000 |
| Simpson Fam Foundation | | Pittsburgh, PA | Local | 7 | 2024 | $7,000 |
| Laurel Ridge Foundation Inc | | Ligonier, PA | Local | 2 | 2024 | $6,000 |
| Philip M Mckenna Foundation Inc | | Latrobe, PA | National | 5 | 2024 | $5,000 |
| Walton Family Foundation Trust | | Ligonier, PA | National | 1 | 2024 | $5,000 |
| Dorothy Babcock Family Charitablefoundation | | Dakota Dunes, SD | National | 4 | 2024 | $5,000 |
| Perkins Charitable Foundation | | Gates Mills, OH | National | 4 | 2024 | $1,800 |
| Western Pennsylvania Conservancy | | Pittsburgh, PA | Local | 1 | 2023 | $13,875 |
| Regis Synan Family Foundation LLC | | Export, PA | Local | 4 | 2023 | $4,250 |
| Peter N and Joan Rossin Stephans Foundation | | Pittsburgh, PA | Local | 1 | 2022 | $100 |
| C F Holdship Charitable Trust | | Pittsburgh, PA | Local | 1 | 2021 | $13,500 |
| Armstrong-Mckay Foundation | | Pittsburgh, PA | National | 3 | 2021 | $1,200 |
| Rita M Mcginley Foundation | | Pittsburgh, PA | Local | 1 | 2021 | $500 |
| White Pine Fund | | Pittsburgh, PA | — | 3 | 2020 | $19,000 |
| Janes & Marilyn a Gilmore Foundation Ua | | Pittsburgh, PA | Local | 1 | 2020 | $100 |
| Foundation for Pennsylvaniawatersheds | | Johnstown, PA | Local | 2 | 2019 | $20,000 |
| Thompson Foundation | | Pittsburgh, PA | Local | 1 | 2019 | $8,493 |
| Donahue Family Foundation Inc | | Pittsburgh, PA | National | 2 | 2019 | $2,000 |
| The H Glen Sample Jr Md Memorial Fund 62346-2 | | Pittsburgh, PA | Local | 1 | 2019 | $507 |