| 350Org | Washington | C | $15.96M |
| Advanced Energy Institute | Washington | C | $8.63M |
| Alaska Wilderness League | Washington | C | $4.01M |
| Alliance for Pulp and Paper Technology | Washington | C | $399K |
| Alliance for Tribal Clean Energy Inc | Washington | C | $15.21M |
| Alliance to Save Energy | Washington | C | $2.32M |
| Amazon Conservation Association | Washington | B | $4.75M |
| American Common Ground Council Inc | Washington | D | $1.05M |
| American Conservation Coalition Inc | Washington | B | $7.42M |
| American Council for an Energy-Efficient | Washington | A | $17.33M |
| American Flood Coalition Inc | Washington | B | $6.02M |
| American Forest Foundation | Washington | C | $20.27M |
| American Forests | Washington | B | $35.61M |
| American Rivers Inc | Washington | B | $53.42M |
| Americans for a Clean Energy Grid Inc | Washington | C | $2.41M |
| Anacostia Riverkeeper Inc | Washington | B | $897K |
| Antarctic and Southern Ocean Coalition | Washington | B | $1.47M |
| Association of Clean Water Administrators | Washington | A | $1.51M |
| Atomic Heritage Foundation | Washington | B | $24K |
| Beyond Pesticides | Washington | C | $1.15M |
| Black Landscape Architects Network | Washington | B | $54K |
| Business Council for Sustainable | Washington | C | $198K |
| Casey Trees | Washington | C | $10.99M |
| Ce Buyers Institute | Washington | B | $7.86M |
| Center for Applied Environmental Law | Washington | B | $2.43M |
| Center for Carbon Removal | Washington | C | $3.43M |
| Center for Clean Air Policy | Washington | D | $1.06M |
| Center for Climate and Energy Solutions Inc | Washington | B | $18.71M |
| Center for Climate Integrity | Washington | A | $9.92M |
| Center for Climate Strategies Inc | Washington | D | $359K |
| Center for Progressive Reform Inc | Washington | B | $1.06M |
| Center for Responsible Travel | Washington | C | $585K |
| Center for Urban Sustainability | Washington | F | $22K |
| Circular Action Alliance | Washington | C | $537K |
| Citizens for Responsible Energy | Washington | B | $7.58M |
| Clasp | Washington | A | $28.95M |
| Clean Air Institute | Washington | A | $323K |
| Clean Economy Fund | Washington | C | $6.98M |
| Clean Energy for America Education Fund | Washington | C | $962K |
| Clean Energy Works | Washington | C | $2.20M |
| Clean Future Forum Inc | Washington | D | $35.41M |
| Clean Water Fund | Washington | B | $6.13M |
| Clearpath Inc | Washington | B | $26.63M |
| Climate Advisers Trust | Washington | F | $14K |
| Climate and Clean Energy Equity Fund | Washington | C | $29.51M |
| Climate Equity Foundation | Washington | F | $80K |
| Climate Inc | Washington | D | $19K |
| Climate Institute | Washington | F | $32K |
| Climate Leadership Council Inc | Washington | C | $3.96M |
| Climate Power Education Fund | Washington | F | $11.51M |
| Climate Resilience for All | Washington | C | $5.93M |
| Coalition for Green Capital | Washington | D | $24.32M |
| Coastal States Stewardship Foundation | Washington | C | $6.71M |
| Code4Nature Inc | Washington | F | $349K |
| Colibri Catalyst Inc | Washington | F | $250K |
| Conservania | Washington | F | $101K |
| Conservation Innovation Fund | Washington | C | $5.27M |
| Conservative Climate Foundation Inc | Washington | C | $1.43M |
| CRT Group Foundation | Washington | D | $156 |
| DC Natives | Washington | F | $55K |
| Delterra Inc | Washington | C | $3.74M |
| District of Columbia Green Spaces Alliance Inc | Washington | C | $222K |
| Dumbarton Oaks Park Conservancy Inc | Washington | F | $666K |
| E3G Third Generation Environmentalism | Washington | F | $1.26M |
| Earth Advocacy Institute Inc | Washington | B | $2,026 |
| Earth Conservation Corps | Washington | F | $600K |
| Earth Council Foundation - US | Washington | F | $9 |
| Earth Day Network Inc | Washington | D | $3.34M |
| Earthshare | Washington | D | $37.27M |
| Earthshare Washington | Washington | D | $55K |
| Earthshot Foundation | Washington | C | $193K |
| Ecoamerica | Washington | C | $3.00M |
| Ecological Society of America | Washington | A | $7.67M |
| Efficiency Valuation Organization | Washington | B | $410K |
| Efi Foundation | Washington | A | $14.01M |
| Electrification Coalition Foundation | Washington | B | $3.98M |
| Energy Innovation Reform Project | Washington | B | $796K |
| Energy Programs Consortium | Washington | C | $30K |
| Environmental Design Research | Washington | C | $410K |
| Environmental Integrity Project | Washington | B | $6.87M |
| Environmental Law Institute | Washington | A | $7.19M |
| Environmental Protection Network | Washington | B | $3.85M |
| Environmental Research Institute of the | Washington | B | $2.26M |
| Environmental Working Group | Washington | B | $16.37M |
| Evergreen Collaborative | Washington | C | $7.98M |
| Extinction Rebellion DC - | Washington | C | $43K |
| Fearless Fund | Washington | F | $40K |
| Forest Service International Foundation | Washington | C | $534K |
| Forest Trends Association | Washington | B | $6.02M |
| Forestplanet Inc | Washington | F | $107K |
| Foundation Earth | Washington | B | $542K |
| Friends of Fletchers Cove | Washington | D | $16K |
| Friends of Montrose Park | Washington | F | $129K |
| Friends of the Earth | Washington | B | $20.40M |
| Friends of the National Arboretum | Washington | A | $3.08M |
| Friends of the Osa | Washington | F | $13.42M |
| Georgetown Garden Club | Washington | B | $67K |
| Georgetown Reuse | Washington | C | $30K |
| Global Carbon Management Foundation | Washington | C | $100K |
| Global Fishing Watch Inc | Washington | C | $19.12M |
| Global Sustainable Tourism Council | Washington | A | $2.16M |
| Goelectricdrive Foundation | Washington | F | $9 |
| Great Barrier Reef Foundation USA Inc | Washington | C | $47.81M |
| Greater Washington Region Clean Cities | Washington | F | $795K |
| Green 20 | Washington | C | $667K |
| Green Seal Inc | Washington | A | $3.70M |
| Greenlight America | Washington | C | $3.24M |
| Greenpeace Fund Inc | Washington | C | $26.33M |
| Groundswell Inc | Washington | B | $8.55M |
| Hyo Jeong International Foundation | Washington | C | $496K |
| Institute for Energy Research | Washington | B | $2.26M |
| Institute for Market Transformation | Washington | B | $6.54M |
| Int'l Union for Conservation of Nature & | Washington | C | $3.07M |
| International Conservation Caucus | Washington | B | $5.51M |
| Island Press | Washington | C | $2.06M |
| Land Trust Accreditation Commission | Washington | A | $1.49M |
| Land Trust Alliance Inc | Washington | A | $22.35M |
| League of Conservation Voters Education | Washington | B | $75.21M |
| Macarthur Beautification Group | Washington | D | $26K |
| Manu | Washington | D | $320K |
| Marine Debris Foundation | Washington | B | $300K |
| Mighty Earth Inc | Washington | B | $7.32M |
| Mission Possible Partnership USA Inc | Washington | C | $9.70M |
| Mobilizegreen Inc | Washington | C | $9.91M |
| National Association of | Washington | B | $19.29M |
| National Association of Clean | Washington | B | $1.53M |
| National Association of Railroad | Washington | B | $1.29M |
| National Association of State Foresters | Washington | D | $48K |
| National Capital Area Garden Club Inc | Washington | D | $52K |
| National Conservation Foundation | Washington | B | $768K |
| National Energy Assistance Directors | Washington | B | $528K |
| National Energy Resources Organization | Washington | B | $475K |
| National Environmental Education and | Washington | D | $3.38M |
| National Fish Habitat Fund Inc | Washington | C | $322K |
| National Parks Conservation Association | Washington | B | $51.62M |
| National Waterways Foundation | Washington | B | $68K |
| Natural State LTD | Washington | F | $8.15M |
| Netcentric Campaigns | Washington | C | $333K |
| New Columbia Community Land Trust | Washington | B | $35K |
| New Venture Fund | Washington | C | $662.36M |
| North American Association for Environmental Educa | Washington | B | $7.36M |
| Northeast-Midwest State Foresters | Washington | A | $937K |
| Ocean Conservancy | Washington | B | $48.81M |
| Ocean Doctor Inc | Washington | F | $165K |
| Ocean Risk and Resilience Action | Washington | C | $1.89M |
| Oceana Inc | Washington | C | $34.67M |
| Oo Project | Washington | C | $3.86M |
| Openaq Inc | Washington | A | $748K |
| Outdoor Alliance | Washington | B | $1.75M |
| Paintcare Inc | Washington | A | $77.14M |
| Park RX America | Washington | C | $152K |
| Partnership for the National Trails | Washington | B | $507K |
| Pinchot Institute for Conservation | Washington | C | $1.24M |
| Policy Action for a Clean Tomorrow Inc | Washington | F | $645K |
| Potomac Riverkeeper Network | Washington | B | $2.62M |
| Rails to Trails Conservancy | Washington | B | $13.29M |
| Recycling Research Foundation Inc | Washington | D | $86K |
| Regulatory Assistance Project | Washington | C | $10.02M |
| Renewable Energy Wildlife Institute | Washington | B | $3.81M |
| Reserva the Youth Land Trust Inc | Washington | C | $142K |
| Resources for the Future Inc | Washington | B | $15.55M |
| Restore America's Estuaries | Washington | B | $8.11M |
| Rewiring America | Washington | C | $37.62M |
| Rewiring Community Investment Fund Inc | Washington | F | $5.03M |
| Rights and Resources Institute Inc | Washington | C | $7.15M |
| Rosedale Conservancy Inc | Washington | D | $151K |
| Rural Investment to Protect Our Environment | Washington | C | $517K |
| Save America's Forests Fund Inc | Washington | D | $36K |
| Scenic America | Washington | A | $2.11M |
| Smart Electric Power Alliance | Washington | A | $19.88M |
| Smart Growth America | Washington | B | $7.20M |
| Smart Surfaces Coalition | Washington | C | $1.50M |
| Society for Conservation Biology | Washington | A | $4.18M |
| Solar & Storage Industries Institute | Washington | C | $1.40M |
| Solar Electric Light Fund | Washington | B | $1.52M |
| Solar United Neighbors Inc | Washington | B | $13.72M |
| Solarapp Foundation | Washington | B | $1.52M |
| Southern Group of Foresters Inc | Washington | C | $946K |
| ST Catherine Island Foundation Inc | Washington | F | $20K |
| Students for Carbon Dividends Inc | Washington | C | $766K |
| Sunrise Movement Education Fund | Washington | C | $3.68M |
| Sustainable Forestry Initiative Inc | Washington | A | $13.54M |
| The Alliance for Climate Protection | Washington | B | $21.07M |
| The Alliance for Just Deliberation | Washington | C | $2.41M |
| The Bureau of Land Management Foundation | Washington | C | $5.08M |
| The Center for Water Security and | Washington | C | $135K |
| The Energy for Growth Hub Inc | Washington | D | $2.56M |
| The Green Scheme | Washington | F | $213K |
| The House of Green Inc | Washington | D | $2,264 |
| The International Council on Clean | Washington | C | $22.29M |
| The Nat'l Fund for the US Botanic | Washington | D | $203K |
| The National Bonsai Foundation | Washington | C | $1.02M |
| The National Council for Science and | Washington | C | $266K |
| The Next 100 Syndicate | Washington | C | $571K |
| The Ocean Foundation | Washington | B | $13.20M |
| The Organic Center Inc | Washington | A | $1.05M |
| The Partnership Project Inc | Washington | C | $29.16M |
| The Peregrine Project - Cleaner Greener DC | Washington | C | $3,000 |
| The Recycling Partnership Inc | Washington | A | $41.18M |
| The Sargasso Sea Project Inc | Washington | C | $215K |
| The Society for Ecological Restoration Inc | Washington | A | $3.45M |
| The Urban Land Institute | Washington | A | $92.33M |
| The Wilderness Society | Washington | B | $38.26M |
| Transcaucasian Trail Association | Washington | C | $92K |
| Tregaron Conservancy | Washington | C | $732K |
| US Climate Action Network | Washington | C | $1.73M |
| US Green Building Council Inc | Washington | A | $50.31M |
| US Water Alliance | Washington | A | $7.91M |
| Verra | Washington | A | $30.62M |
| Ward 8 Woods Conservancy Inc | Washington | C | $620K |
| Water Finance Exchange Inc | Washington | C | $2.49M |
| Windward Fund | Washington | C | $308.25M |
| World Wildlife Fund Inc | Washington | B | $366.66M |
| Wyss Center for Innovation Inc | Washington | B | $735 |
| Youth Learning as Citizen Environmental | Washington | C | $248K |
| Zenith Community Arts Foundation | Washington | B | $174K |
| Zero Emission Maritime Buyers Alliance | Washington | D | $2.19M |
| Zero Emission Transportation Assoc | Washington | B | $5.56M |
Charity Clarity