| Chesapeake Bay Trust | | Tampa, FL | Local | 1 | 2024 | $2,274,240 |
| National Arbor Day Foundation | | Lincoln, NE | National | 4 | 2024 | $374,750 |
| Casey Trees | | Washington, DC | National | 3 | 2024 | $225,000 |
| The Abell Foundation Inc | | Baltimore, MD | Local | 4 | 2024 | $222,500 |
| Clayton Baker Trust | | Baltimore, MD | Local | 6 | 2024 | $165,000 |
| Lockhart Vaughan Foundation Inc | | Baltimore, MD | Local | 6 | 2024 | $110,000 |
| Henry and Ruth Blaustein Rosenberg Foundation | | Baltimore, MD | Local | 2 | 2024 | $100,000 |
| Bunting Family Foundation Inc | | Hunt Valley, MD | Local | 7 | 2024 | $80,000 |
| The Zanvyl and Isabelle Krieger Fund Inc | | Baltimore, MD | Local | 5 | 2024 | $60,000 |
| Annie E Casey Foundation | | Baltimore, MD | National | 4 | 2024 | $53,454 |
| The Elizabeth B and Arthur E Roswell Foundation Inc | | Baltimore, MD | National | 7 | 2024 | $35,000 |
| Arbor Dog Foundation Inc | | Cockeysville, MD | Local | 2 | 2024 | $18,000 |
| Venable Baetjer and Howard Foundation | | Baltimore, MD | National | 2 | 2024 | $15,000 |
| Patagoniaorg | | | National | 1 | 2024 | $10,000 |
| T Rowe Price Foundation | | Baltimore, MD | Local | 1 | 2024 | $10,000 |
| M Goldseker Foundation of Md | | Baltimore, MD | Local | 1 | 2024 | $10,000 |
| Jane Krieger Schapiro Family Foundation Inc | | Baltimore, MD | Local | 1 | 2024 | $10,000 |
| Eliasburg Family Foundation Inc | | Jupiter, FL | Local | 4 | 2024 | $6,000 |
| Urban Forestry Organization | | Pine Plains, NY | National | 5 | 2024 | $5,200 |
| Erkiletian Family Foundation | | Arlington, VA | National | 1 | 2024 | $5,000 |
| Cooper-Siegel Family Foundation | | Pittsburgh, PA | Local | 1 | 2024 | $2,000 |
| Lloyd E Mitchell Foundation | | Chevy Chase, MD | Local | 1 | 2024 | $1,000 |
| White House Farm Foundation | | Bristow, VA | Local | 1 | 2024 | $767 |
| Brown Advisory Charitable Foundation Inc | | Baltimore, MD | Local | 1 | 2024 | $250 |
| France-Merrick Foundation Inc | | Baltimore, MD | Local | 2 | 2023 | $300,000 |
| Truist Foundation Inc | | Orlando, FL | National | 1 | 2023 | $25,000 |
| The Heather Hay Miller Foundation I Nc | | Las Vegas, NV | Local | 1 | 2023 | $15,000 |
| Ac and Penney Hubbard Foundation Inc | | | Local | 2 | 2023 | $5,000 |
| Southway Builders Charitable Trust Inc | | Baltimore, MD | Local | 1 | 2023 | $500 |
| Janet and Stanley Kane Foundation Inc | | Sarasota, FL | National | 2 | 2022 | $11,000 |
| Mary Jean and Oliver Travers Foundation Inc | | Phoenix, MD | Local | 1 | 2021 | $5,000 |
| Blum Family Foundation Inc | | Baltimore, MD | Local | 1 | 2021 | $500 |
| American Forests | | Washington, DC | National | 1 | 2020 | $87,500 |
| The United Way of Central Maryland Inc | | Baltimore, MD | Local | 3 | 2020 | $47,136 |
| Sumner T Mcknight Foundation | | Baltimore, MD | Local | 2 | 2020 | $10,000 |
| Keep America Beautiful Inc | | Stamford, CT | National | 1 | 2020 | $4,500 |
| Linehan Family Foundation Inc | | Baltimore, MD | Local | 2 | 2019 | $2,500 |
| Helen Pumphrey Denit Trust Charitab Le and Educational Purposes | | Dallas, TX | Local | 1 | 2018 | $10,000 |
| Strong City Baltimore Inc | | | — | 1 | 2018 | $5,000 |
| Middendorf Foundation Inc | | Baltimore, MD | Local | 1 | 2017 | $75,000 |