| 11th Hour Project |
| Arc Associates |
| As You Sow Foundation |
| Bauman Foundation |
| Broad Reach Fund |
| Bullitt Foundation |
| California Endowment |
| California Wellness Foundation |
| Canary Fund |
| Cedar Tree Foundation |
| Central New York Community Foundation |
| Ceres Trust |
| Charles Stewart Mott Foundation |
| Civis Consulting, Inc. |
| Claneil Foundation |
| Community Foundation for Greater Buffalo |
| Community Foundation of Herkimer & Oneida Counties |
| Cornell Douglas Foundation |
| CS Fund |
| Energy Foundation |
| Fine Fund |
| Forsythia Foundation |
| Foundation for Pennsylvania Watersheds |
| Franciscan Sisters of Mary |
| Fred A. and Barbara M. Erb Family Foundation |
| Garfield Foundation |
| GRACE Communications Foundation |
| Groundswell Fund |
| Heinz Endowments |
| High Tide Foundation |
| Hull Family Foundation |
| Jacob and Hilda Blaustein Foundation |
| Jenifer Altman Foundation |
| John Merck Fund |
| Jonas Philanthropies |
| Joyce Foundation |
| JPB Foundation |
| Keith Campbell Foundation for the Environment |
| Kresge Foundation |
| Laughing Gull |
| Liberty Hill Foundation |
| Lucy Rockefeller Waletzky, M.D - Individual Donor |
| Marisla Foundation |
| Morris and Gwendolyn Cafritz Foundation |
| New England Grassroots Environment Fund |
| New World Foundation |
| New York Community Trust |
| NorthLight Foundation |
| Park Foundation |
| Passport Foundation |
| Peter Sullivan - Individual Donor |
| Philanthropic + Nonprofit Consulting |
| Pisces Foundation |
| Plastic Solutions Fund |
| Robert Wood Johnson Foundation |
| Rockefeller Family Fund |
| Roy and Patricia Disney Family Foundation |
| Sears-Swetland Family Foundation |
| Sierra Health Foundation |
| Singing Field Foundation |
| Solidago Foundation |
| Spring Point Partners |
| The Russell Family Foundation |
| Verna Harrison Associates |
| Wallace Global Fund |
| Water Foundation |
| William Penn Foundation |
