| Charles H Miller Charitable Foundation | | Glenelg, MD | Local | 7 | 2024 | $110,000 |
| A R Landsman Foundation Inc | | Cabin John, MD | Local | 7 | 2024 | $60,120 |
| Cornolia Cogswell Rossi Foundation Inc | | Wilmington, DE | Local | 5 | 2024 | $50,000 |
| G Whitney Snyder Charitable Fund | | Wilmington, DE | Local | 5 | 2024 | $40,000 |
| Community Foundation of Washington County Maryland Incorporated | | Hagerstown, MD | Local | 5 | 2024 | $39,308 |
| Nora Roberts Foundation Inc | | Glenn Dale, MD | National | 5 | 2024 | $29,500 |
| Jewell Foundation Limited | | Bethesda, MD | National | 5 | 2024 | $25,000 |
| The Morningstar Philanthropic Foundation | | Bethesda, MD | National | 5 | 2024 | $25,000 |
| Cowles Family Foundation | | Albuquerque, NM | National | 2 | 2024 | $22,000 |
| Bou Family Foundation Inc | | Bethesda, MD | National | 6 | 2024 | $21,800 |
| Katherine Harding Wunder Foundation | | Jupiter, FL | National | 7 | 2024 | $21,000 |
| Rei Cooperative Action Fund | | Sumner, WA | National | 2 | 2024 | $20,000 |
| Chesapeake Bay Trust | | Tampa, FL | Local | 1 | 2024 | $14,005 |
| Richard E and Nancy P Marriott Foundation Inc | | Bethesda, MD | Local | 1 | 2024 | $12,000 |
| The Ferris Family Foundation | | Franconia, NH | National | 5 | 2024 | $7,684 |
| Sidgmore Family Foundation | | Potomac, MD | National | 2 | 2024 | $7,000 |
| John and Rachel King Foundation | | Cabin John, MD | Local | 4 | 2024 | $6,500 |
| Butz Foundation Inc | | Adamstown, MD | National | 3 | 2024 | $5,500 |
| Delaplaine Foundation Inc | | Frederick, MD | Local | 1 | 2024 | $5,000 |
| Robert W & Amy T Barker Family Foundation Inc | | Pennington, NJ | National | 4 | 2024 | $3,500 |
| Marguerite G Cooley Foundation | | Chevy Chase, MD | National | 3 | 2024 | $3,000 |
| Madeira Fund Inc | | Indianapolis, IN | Local | 3 | 2024 | $1,000 |
| Blechman-Morenoff Foundation Inc | | Rockville, MD | National | 3 | 2024 | $600 |
| Maryland Lyric Opera | | Columbia, MD | Local | 1 | 2024 | $442 |
| National Park Foundation | | Washington, DC | National | 4 | 2023 | $144,515 |
| Mars Hq Regional Foundation | | New York, NY | National | 4 | 2023 | $35,000 |
| Mann-Paller Foundation Inc | | Bethesda, MD | National | 5 | 2023 | $27,000 |
| Rockefeller Foundation | | New York, NY | Local | 3 | 2023 | $3,750 |
| Community Foundation of Frederick County Maryland Incorporated | | Frederick, MD | Local | 1 | 2022 | $22,880 |
| Crescent Cities Charities Inc | | Oxon Hill, MD | National | 2 | 2022 | $20,000 |
| United States Pharmacopeial Convention Inc | | Rockville, MD | Local | 3 | 2022 | $18,600 |
| Firstenergy Foundation | | Akron, OH | National | 1 | 2022 | $15,000 |
| Arts and Humanities Council of Montgomery County in | | Silver Spring, MD | Local | 1 | 2022 | $9,200 |
| Amar Kartar Foundation Inc | | Potomac, MD | Local | 1 | 2022 | $1,300 |
| E Bryce & Harriet Alpern Foundation | | | — | 4 | 2021 | $18,500 |
| Bessie Rattner Foundation Inc | | Florence, MA | National | 1 | 2021 | $10,000 |
| Maryland Historical Society | | Baltimore, MD | Local | 2 | 2020 | $20,000 |
| Barron Family Foundation Inc | | Potomac, MD | National | 1 | 2020 | $12,500 |
| Rock Creek Conservancy Inc | | Bethesda, MD | — | 1 | 2020 | $10,000 |
| Leonard P Steuart Foundation Inc | | | — | 2 | 2020 | $900 |
| Paul and Suzanne Hanifl Foundation | | Chicago, IL | Local | 1 | 2020 | $779 |
| Earthshare Chapters Inc | | Washington, DC | National | 3 | 2019 | $61,518 |
| Buchanan Family Foundation Inc | | Potomac, MD | National | 2 | 2019 | $2,000 |
| Stanley and Jolene Sloter Family Foundation | | Arlington, VA | Local | 1 | 2019 | $500 |
| Carlson Family Foundation Inc | | Chapel Hill, NC | National | 1 | 2018 | $5,000 |
| Frederick Henry Prince Testamentary Trust | | Chicago, IL | National | 1 | 2018 | $5,000 |
| Warren Cross Foundation | | Natick, MA | Local | 1 | 2018 | $1,500 |
| The National Environmental Education and Training Foundation | | Washington, DC | National | 1 | 2017 | $13,000 |