| NATURE CONSERVATION TR | $134,751,852 | C20 | published | | Decatur, IL | 2025 |
| CLIMATE POWER | $79,404,156 | C20 | published | survivor: disaster | Washington, DC | 2024 |
| BONNEVILLE ENVIRONMENTAL FOUNDATION | $51,836,979 | C20 | published | | Portland, OR | 2024 |
| CLIMATE UNITED FUND | $48,862,682 | C20 | published | | Bethesda, MD | 2024 |
| CENTER FOR INTERNATIONAL FORESTRY RESEARCH | $48,574,398 | C20 | published | women: issues | Alexandria, VA | 2024 |
| CARBON MAPPER INC | $42,000,541 | C20 | published | space: outer | Pasadena, CA | 2024 |
| PRODUCT CARE ASSOCIATION | $39,115,213 | C20 | published | | Canada | 2024 |
| ALASKA CLEAN SEAS | $31,338,187 | C20 | inferred 0.60 | | Anchorage, AK | 2024 |
| VERRA | $30,616,660 | C20 | published | launch: launch | Washington, DC | 2025 |
| COMMUNITY ENVIRONMENTAL CENTER INC | $19,442,613 | C20 | inferred 0.70 | | Long Island City, NY | 2012 |
| MASSACHUSETTS SERVICE ALLIANCE INC | $19,317,819 | C20 | published | | Boston, MA | 2024 |
| OREGON CLIMATE TRUST | $18,165,269 | C20 | published | | Portland, OR | 2025 |
| CHILDRENS HEALTH DEFENSE | $15,234,096 | C20 | published | science: research education | Franklin Lakes, NJ | 2024 |
| SAUGET SANITARY DEVELOPMENT & RESEARCH ASSOCIATION | $15,151,698 | C20 | inferred 0.60 | | Sauget, IL | 2024 |
| DEEP SOUTH CENTER FOR ENVIRONMENTAL JUSTICE | $15,102,797 | C20 | published | science: research education | New Orleans, LA | 2024 |
| VALLEY CAN | $11,697,759 | C20 | published | | Sacramento, CA | 2024 |
| SEVIER SOLID WASTE INC | $11,054,320 | C20 | published | | Pigeon Forge, TN | 2024 |
| INCLUSIVE PROSPERITY CAPITAL INC | $10,811,577 | C20 | published | | Hartford, CT | 2024 |
| MIDWEST RENEWABLE ENERGY TRACKING SYSTEM INC | $10,175,798 | C20 | published | | Minneapolis, MN | 2025 |
| NATURE AND CULTURE INTERNATIONAL | $8,847,336 | C20 | published | science: research education | Del Mar, CA | 2025 |
| ADVANCED ENERGY INSTITUTE | $8,625,467 | C20 | published | | Washington, DC | 2024 |
| SOUTHERN CALIFORNIA MOUNTAINS FOUNDATION | $8,289,122 | C20 | published | | Sn Bernrdno, CA | 2024 |
| CITIZENS FOR RESPONSIBLE ENERGY SOLUTIONS FORUM | $7,575,775 | C20 | published | | Washington, DC | 2024 |
| ALASKA CHADUX CORPORATION INC | $7,462,838 | C20 | inferred 0.80 | | Anchorage, AK | 2024 |
| AMERICAN LITTORAL SOCIETY | $6,936,666 | C20 | published | science: research education | Highlands, NJ | 2025 |
| PROTECT OUR WINTERS | $6,668,021 | C20 | published | science: research education | Boulder, CO | 2024 |
| MARINE EXCHANGE OF ALASKA INC | $6,395,554 | C20 | published | | Juneau, AK | 2022 |
| CITIZENS CONSERVATION CORPS INC | $6,277,989 | C20 | inferred 0.50 | | Beckley, WV | 2016 |
| CLIMATE VAULT INC | $5,991,551 | C20 | published | | Chicago, IL | 2023 |
| PARTNERSHIP FOR CARBON ACCOUNTING FINANCIALS | $5,599,669 | C20 | published | | Minneapolis, MN | 2024 |
| THE LAMB CENTER | $5,510,650 | C20 | published | | Fairfax, VA | 2024 |
| MALAGASY FOUNDATION IN ENVIRONMENT TANY MEVA | $5,423,677 | C20 | published | | Madagascar | 2025 |
| REGIONAL AIR QUALITY COUNCIL | $5,334,607 | C20 | inferred 0.70 | | Denver, CO | 2025 |
| PINEWOOD TRUSTEE INC | $5,232,596 | C20 | inferred 0.80 | | Mount Pleasant, SC | 2025 |
| CLEAN WISCONSIN INC | $5,017,740 | C20 | published | | Madison, WI | 2025 |
| FEDERATION OF STATE CONSERVATION VOTER LEAGUES INC | $4,992,542 | C20 | inferred 0.80 | | Madison, WI | 2024 |
| CRADLE TO CRADLE PRODUCTS INNOVATION INSTITUTE INC | $4,623,395 | C20 | inferred 0.50 | science: research education | Oakland, CA | 2024 |
| BLUE HILLS ENVIRONMENTAL ASSOCIATION | $4,140,647 | C20 | published | | St Johns, AZ | 2024 |
| ALASKA COMMUNITY ACTION ON TOXICS | $4,130,367 | C20 | published | | Anchorage, AK | 2024 |
| BRIDGING THE GAP INC | $4,088,360 | C20 | inferred 0.80 | women: issues | Kansas City, MO | 2024 |
| CLIMATE LEADERSHIP COUNCIL INC | $3,958,282 | C20 | published | | Washington, DC | 2024 |
| LOUISIANA RURAL WATER ASSOCIATION INC | $3,949,934 | C20 | inferred 0.70 | | Kinder, LA | 2024 |
| THE FUNDERS NETWORK INC | $3,728,913 | C20 | published | | Coral Gables, FL | 2024 |
| ERTV COMPLIANCE GROUP | $3,709,313 | C20 | published | | Seattle, WA | 2024 |
| TERRASET | $3,573,511 | C20 | published | | New York, NY | 2024 |
| SIOUX RURAL WATER SYSTEM INC | $3,566,917 | C20 | inferred 0.45 | | Watertown, SD | 2025 |
| ADOPT A CHARGER INC | $3,475,546 | C20 | published | | Pls Vrds Est, CA | 2025 |
| COMMUNITY ENVIRONMENTAL COUNCIL INC | $3,427,242 | C20 | published | | Santa Barbara, CA | 2024 |
| IOWA AGRICULTURE WATER ALLIANCE | $3,396,695 | C20 | published | science: research education | Ankeny, IA | 2024 |
| PONTCHARTRAIN CONSERVANCY | $3,340,085 | C20 | published | science: research education | Metairie, LA | 2024 |
| CLIMATE RESOLVE | $3,262,305 | C20 | published | launch: launch | Los Angeles, CA | 2024 |
| KLAMATH WATERSHED PARTNERSHIP | $3,197,104 | C20 | published | | Klamath Falls, OR | 2024 |
| WELL DONE FOUNDATION INC | $3,182,935 | C20 | published | | Bozeman, MT | 2025 |
| SUSTAINABLE CONNECTIONS | $3,115,288 | C20 | published | | Bellingham, WA | 2024 |
| BUILDING TRANSPARENCY | $2,955,887 | C20 | published | | Seattle, WA | 2024 |
| CALIFORNIA COUNCIL FOR ENVIRONMENTAL AND ECONOMIC BALANCE | $2,868,929 | C20 | inferred 0.60 | | San Francisco, CA | 2025 |
| THE SCRAP EXCHANGE INC | $2,843,401 | C20 | published | | Durham, NC | 2024 |
| REGIONAL GREENHOUSE GAS INITIATIVE INC | $2,810,857 | C20 | published | science: research education | New York, NY | 2025 |
| UNKITAWA | $2,804,748 | C20 | published | violence: gun | Kent, WA | 2024 |
| NEW YORK LEAGUE OF CONSERVATION VOTERS INC | $2,790,108 | C20 | inferred 0.70 | | New York, NY | 2024 |
| DONEY PARK WATER | $2,752,171 | C20 | inferred 0.45 | | Flagstaff, AZ | 2025 |
| BIG INITIATIVES INCORPORATED | $2,733,659 | C20 | published | | Brooklyn, NY | 2024 |
| SOLID WASTE DISPOSABLE INC | $2,710,433 | C20 | inferred 0.60 | | Jasper, TN | 2024 |
| HOUSTON REGIONAL MONITORING CORPORATION | $2,651,083 | C20 | published | | Baytown, TX | 2024 |
| CLEAN RIVERS COOPERATIVE | $2,625,495 | C20 | inferred 0.50 | | Portland, OR | 2024 |
| ENVIRONMENTAL RESEARCH CENTER INC | $2,596,630 | C20 | published | science: research education | Ft Oglethorpe, GA | 2025 |
| GEORGIA CONSERVATION VOTERS EDUCATION FUND INC | $2,541,991 | C20 | published | | Atlanta, GA | 2024 |
| SEVENTH GENERATION ADVISORS | $2,532,678 | C20 | published | | Santa Monica, CA | 2024 |
| NATIONAL COUNCIL ON RADIATION PROTECTION AND MEASUREMENTS | $2,512,970 | C20 | published | science: research education | Bethesda, MD | 2024 |
| CARBON LEADERSHIP FORUM | $2,497,382 | C20 | published | | Bellevue, WA | 2024 |
| HEALTHY SCHOOLS CAMPAIGN | $2,384,452 | C20 | published | | Chicago, IL | 2024 |
| EAST TENNESSEE CLEAN FUELS COALITION | $2,367,940 | C20 | published | | Knoxville, TN | 2024 |
| FORUM FOR THE FUTURE US INC | $2,367,800 | C20 | inferred 0.45 | | New York, NY | 2024 |
| PEOPLE FOR COMMUNITY RECOVERY | $2,295,884 | C20 | inferred 0.55 | | Chicago, IL | 2024 |
| MID ATLANTIC REGIONAL AIR MANAGEMENT ASSOCATION INC | $2,263,191 | C20 | published | science: research education | Towson, MD | 2024 |
| ANDERSON-ROGERS FOUNDATION INC | $2,232,875 | C20 | published | abuse: animal | New York, NY | 2025 |
| ZERO EMISSION MARITIME BUYERS ALLIANCE | $2,192,926 | C20 | published | | Washington, DC | 2025 |
| COALITION FOR CLEAN AIR | $2,149,048 | C20 | published | | Los Angeles, CA | 2024 |
| LAKES ENVIRONMENT ASSOCIATION | $2,083,996 | C20 | published | science: research education | Bridgton, ME | 2025 |
| BLACK OAKS CENTER FOR SUSTAINABLE RENEWABLE LIVING NFP | $2,069,279 | C20 | published | science: research education | Chicago, IL | 2024 |
| MADISON ENVIRONMENTAL RESOURCING INC | $2,066,740 | C20 | published | | Madison, WI | 2023 |
| CENTRAL OREGON LANDWATCH | $2,011,009 | C20 | inferred 0.80 | | Bend, OR | 2025 |
| ADVENTURERS AND SCIENTISTS FOR CONSERVATION | $1,993,301 | C20 | published | science: research education | Bozeman, MT | 2025 |
| AIR ALLIANCE HOUSTON | $1,955,204 | C20 | published | | Houston, TX | 2024 |
| ENVIRONMENTAL COALITION OF SOUTH SEATTLE | $1,933,435 | C20 | published | | Seattle, WA | 2025 |
| VIRIDIANT | $1,911,828 | C20 | published | | Richmond, VA | 2024 |
| GREEN LAKE ASSOCIATION INC | $1,896,514 | C20 | published | science: research education | Green Lake, WI | 2025 |
| BERKELEY EARTH INC | $1,892,923 | C20 | published | science: research education | Berkeley, CA | 2024 |
| AZ WATER ASSOCIATION | $1,861,654 | C20 | published | | Chandler, AZ | 2024 |
| VILLAGE WASTE WATER COMPANY INC | $1,860,110 | C20 | published | | Bella Vista, AR | 2024 |
| CATAWBA RIVERKEEPER FOUNDATION INC | $1,768,587 | C20 | published | girls boys: boys girls clubs | Mcadenville, NC | 2024 |
| AUDUBON OF KANSAS INC | $1,760,681 | C20 | published | | Manhattan, KS | 2025 |
| THE US CLIMATE ACTION NETWORK | $1,727,893 | C20 | published | | Washington, DC | 2024 |
| OCEANIC GLOBAL FOUNDATION | $1,702,087 | C20 | published | | New York, NY | 2024 |
| FRIENDS OF THE SAN JUANS | $1,630,451 | C20 | inferred 0.85 | | Friday Harbor, WA | 2024 |
| 3 RIVERS WET WEATHER INC | $1,626,915 | C20 | published | | Glenshaw, PA | 2024 |
| BEYOND BENIGN INC | $1,553,948 | C20 | published | science: research education | Wilmington, MA | 2024 |
| CLIMATE ANALYTICS INC | $1,547,797 | C20 | published | science: research education | New York, NY | 2024 |
| NATIONAL ASSOCIATION OF CLEAN AIR AGENCIES | $1,527,531 | C20 | published | | Washington, DC | 2024 |
| FEDERATION OF STATE CONSERVATION VOTER LEAGUES INC | $1,519,842 | C20 | inferred 0.80 | | Minneapolis, MN | 2024 |