| National Academy of Sciences | | Washington, DC | National | 1 | 2024 | $606,772 |
| Cynthia & Geo Mitchell Foundation | | The Woodlands, TX | Local | 5 | 2024 | $392,500 |
| Harris and Eliza Kempner Fund | | Galveston, TX | Local | 7 | 2024 | $285,100 |
| John P Mcgovern Foundation | | Houston, TX | Local | 5 | 2024 | $134,000 |
| Edward & Helen Oppenheimer Foundation | | Houston, TX | Local | 6 | 2024 | $122,500 |
| Dr Leon Bromberg Charitable Tr | | Galveston, TX | Local | 7 | 2024 | $98,000 |
| North American Association for Environmental Education | | Washington, DC | National | 1 | 2024 | $40,746 |
| National Marine Sanctuary Foundation | | Silver Spring, MD | National | 1 | 2024 | $20,000 |
| Stephen M Seay Foundation Inc | | Dallas, TX | Local | 4 | 2024 | $18,000 |
| J P & Mary Jon Bryan Foundation | | Houston, TX | Local | 1 | 2024 | $5,250 |
| Moody Foundation | | Galveston, TX | Local | 1 | 2024 | $5,000 |
| Grant Family Fund | | Galveston, TX | National | 2 | 2024 | $3,500 |
| James P Jay Hunter IV Memorial Foundation | | Lufkin, TX | Local | 2 | 2024 | $2,000 |
| Centerpoint Energy Foundation Inc | | Houston, TX | National | 2 | 2023 | $135,000 |
| Edward J Hudson Jr Foundation | | Houston, TX | Local | 1 | 2023 | $100,000 |
| Ippolito Charitable Foundation of Galveston | | Houston, TX | Local | 5 | 2023 | $80,000 |
| Harry L Willett Foundation | | Littleton, CO | Local | 1 | 2023 | $75,000 |
| Roberta K Randall Charitable Foundation | | Sugar Land, TX | Local | 6 | 2023 | $20,500 |
| The Malcolm C Damuth Foundation | | Austin, TX | Local | 1 | 2023 | $15,000 |
| Gaalema Family Foundation | | | National | 1 | 2023 | $500 |
| Brown Foundation Inc | | Houston, TX | Local | 1 | 2022 | $200,000 |
| Galveston Bay Foundation | | Kemah, TX | National | 2 | 2022 | $25,000 |
| Rr Family Foundation | | Houston, TX | Local | 1 | 2022 | $1,000 |
| Permanent Endowment Fund of the Moody Memorial First United Method | | Galveston, TX | Local | 1 | 2021 | $50,000 |
| Parks and Wildlife Foundation of Texas Inc | | Dallas, TX | Local | 2 | 2021 | $16,000 |
| Charles B Sweatt Foundation | | Saint Louis, MO | National | 1 | 2021 | $2,000 |
| Rider Family Fund | | Galveston, TX | Local | 1 | 2021 | $1,000 |