| Holden Arboretum Trust | | Brooklyn, OH | Local | 7 | 2024 | $34,363,205 |
| Veale Foundation | | Pepper Pike, OH | Local | 9 | 2024 | $181,000 |
| Robert R & Gay C Cull Family Foundation | | Cleveland, OH | Local | 6 | 2024 | $80,000 |
| Arch Eagle Foundation | | Lyndhurst, OH | Local | 1 | 2024 | $50,500 |
| Spencer L Murfey Jr Family Foundation | | Windermere, FL | National | 6 | 2024 | $45,000 |
| Hieronymus Family Fund Inc | | Miamisburg, OH | Local | 7 | 2024 | $35,000 |
| Joseph and Nancy Keithley Foundation | | Cleveland, OH | Local | 7 | 2024 | $29,200 |
| Akron Community Foundation | | Akron, OH | Local | 1 | 2024 | $29,000 |
| William M Weiss Foundation | | Novelty, OH | Local | 5 | 2024 | $25,500 |
| Laub Foundation | | Rocky River, OH | Local | 8 | 2024 | $21,500 |
| Robert H Reakirt Fdn Equities 532H-70700010276043 | | Pittsburgh, PA | Local | 1 | 2024 | $12,500 |
| Nancy Andrews Family Foundation | | Richfield, OH | Local | 3 | 2024 | $9,600 |
| Lake County Visitors Bureau Inc | | Painesville, OH | Local | 1 | 2024 | $6,985 |
| Luciano Family Foundation | | Independence, OH | Local | 5 | 2024 | $6,400 |
| Bill and Kathy Oneill Foundation | | Chagrin Falls, OH | Local | 1 | 2024 | $5,000 |
| Frank and Evelyn Schmidt Family Foundation | | Boring, OR | Local | 7 | 2024 | $3,500 |
| Pokorny Family Foundation | | Willoughby, OH | Local | 5 | 2024 | $2,600 |
| Cardinal Charitable Foundation | | Mentor, OH | Local | 1 | 2024 | $2,000 |
| Kling-League Foundation Trust | | Lynden, WA | National | 1 | 2024 | $50 |
| Jewish Federation of Cleveland | | Cleveland, OH | Local | 2 | 2023 | $10,800 |
| Phyllis H & Wm H Evans Charitable Foundation Mnu-013Bf331006 | | Wiloughby Hls, OH | Local | 4 | 2023 | $6,500 |
| Mill-Rose Foundation Inc | | Mentor, OH | Local | 1 | 2023 | $1,000 |
| The Hillier Family Foundation | | | — | 1 | 2022 | $200,000 |
| George M & Pamela S Humphrey Fund | | Philadelphia, PA | Local | 2 | 2022 | $20,000 |
| Perkins Charitable Foundation | | Gates Mills, OH | National | 1 | 2022 | $10,000 |
| Springcreek Foundation | | Berkeley, CA | National | 2 | 2022 | $10,000 |
| The O-I Charities Foundation | | | Local | 4 | 2022 | $5,500 |
| Joseph H & Ellen B Thomas Foundation Inc | | Pepper Pike, OH | Local | 3 | 2022 | $1,100 |
| Roemisch Family Foundation | | Wiloughby Hls, OH | Local | 1 | 2022 | $65 |
| Susan & John Turben Foundation | | | — | 4 | 2021 | $30,800 |
| Center for Plant Conservation Inc | | Escondido, CA | National | 4 | 2021 | $30,000 |
| Rooted in Trees | | | — | 1 | 2021 | $5,284 |
| D M Schneider Foundation | | Cleveland, OH | National | 2 | 2021 | $3,500 |
| Lincoln Electric Foundation Tr | | Brooklyn, OH | — | 2 | 2020 | $10,000 |
| Corinne L Dodero Charitable Tr for the Arts and Sciences | | Cleveland, OH | Local | 1 | 2020 | $5,000 |
| Sussen Foundation | | Palm Bch Gdns, FL | Local | 3 | 2020 | $4,000 |
| J Cromer Mashburn Family Foundation | | Cincinnati, OH | Local | 1 | 2020 | $100 |
| Sogg Foundation Inc | | Moreland Hls, OH | Local | 1 | 2020 | $100 |
| Walter & Jean Kalberer Foundation | | Gates Mills, OH | Local | 1 | 2019 | $100,520 |
| Tree Fund-Tree Research & Education Endowment Fund | | Naperville, IL | National | 1 | 2019 | $5,000 |
| The Albert B & Audrey G Ratner Family Foundation | | Shaker Hts, OH | Local | 2 | 2019 | $2,000 |
| Thomas J Gruber and Judith Fay Gruber Charitable Foundtion | | North Chatham, MA | Local | 1 | 2019 | $1,000 |
| Henry & Eugenia Green Family Foundation Inc | | Shaker Hts, OH | Local | 1 | 2019 | $1,000 |
| Sears-Swetland Family Foundation | | Bratenahl, OH | Local | 1 | 2018 | $15,000 |
| Gries Family Foundation | | Shaker Hts, OH | Local | 1 | 2018 | $4,000 |
| Premier Bank Foundation | | Canfield, OH | Local | 1 | 2018 | $4,000 |
| Rig III Family Foundation | | Wiloughby Hls, OH | Local | 1 | 2018 | $500 |
| Norann Charitable Tr | | Chagrin Falls, OH | Local | 1 | 2018 | $300 |
| Marbeach Foundation | | Solon, OH | National | 1 | 2018 | $100 |