| MARSHALL AREA ECONOMIC DEVELOPMENT ALLIANCE | $119,254,589 | C99 | published | | Marshall, MI | 2024 |
| FONDO MEXICANO PARA LA CONSERVACION DE LA NATURALEZA AC | $57,137,320 | C99 | published | science: research education | Mexico | 2024 |
| THE CONSERVANCY OF SOUTHWEST FLORIDA INC | $45,463,896 | C99 | inferred 0.80 | survivor: disaster | Naples, FL | 2024 |
| NATIONAL NETWORK OF ABORTION FUNDS | $31,706,498 | C99 | published | | Beaverton, OR | 2024 |
| INTERNATIONAL SUSTAINABLE ENERGY FOUNDATION | $30,080,227 | C99 | published | | Austin, TX | 2024 |
| WORLD WILDLIFE FUND CANADA | $28,284,113 | C99 | published | | Canada | 2024 |
| KEEP FLORIDA CLEAN INC | $26,090,394 | C99 | inferred 0.45 | | Tallahassee, FL | 2024 |
| NORTH CAROLINA COASTAL FEDERATION INC | $25,171,726 | C99 | inferred 0.80 | science: research education | Newport, NC | 2024 |
| FORT CAMPBELL HISTORICAL FOUNDATION INC | $21,137,687 | C99 | published | | Fort Campbell, KY | 2025 |
| COASTAL PRAIRIE CONSERVANCY | $19,899,793 | C99 | published | | Houston, TX | 2024 |
| KANSAS ASSOCIATION OF CHILD CARE RESOURCE AND REFERRAL AGENCIES | $18,534,151 | C99 | published | violence: gun | Salina, KS | 2024 |
| WALKING SOFTER | $17,199,926 | C99 | published | science: research education | Jackson, WY | 2024 |
| AMERICAN FRIENDS OF THE OCEAN CLEANUP FOUNDATION | $12,513,955 | C99 | inferred 0.70 | | New York, NY | 2024 |
| SPARK CLIMATE SOLUTIONS INC | $12,435,732 | C99 | published | | Covina, CA | 2025 |
| Mainers for Fair Laws | $11,920,514 | C99 | inferred 0.55 | | Orange, CT | 2021 |
| CARIBBEAN BIODIVERSITY FUND | $10,943,665 | C99 | inferred 0.70 | | Altrincham, CHESHIRE | 2020 |
| OCEAN WISE CONSERVATION ASSOCIATION | $10,870,264 | C99 | inferred 0.50 | science: research education | Canada | 2024 |
| HAVENS HARVEST INC | $10,430,090 | C99 | published | | New Haven, CT | 2024 |
| GRIST MAGAZINE INC | $10,366,804 | C99 | published | launch: launch | Seattle, WA | 2024 |
| SUNSHINE STATE ONE-CALL OF FLORIDA INC | $10,058,153 | C99 | inferred 0.50 | | Debary, FL | 2024 |
| ONE EARTH PHILANTHROPY | $9,615,055 | C99 | published | launch: launch | Los Angeles, CA | 2025 |
| ENERGY UNITED WATER CORPORATION | $9,349,126 | C99 | inferred 0.50 | | Hiddenite, NC | 2024 |
| CLIMATE JUSTICE ALLIANCE | $9,080,028 | C99 | published | | Los Angeles, CA | 2024 |
| TEXAS RURAL WATER ASSOCIATION | $8,890,963 | C99 | inferred 0.45 | | Austin, TX | 2025 |
| ENVIRONMENTAL POLICY INNOVATION CENTER | $7,878,605 | C99 | published | | College Park, MD | 2025 |
| CENTER FOR LAND REFORM INC | $7,593,513 | C99 | published | | Flint, MI | 2025 |
| MCKENZIE WATERSHED ALLIANCE | $7,590,041 | C99 | published | | Springfield, OR | 2024 |
| NATURAL RESOURCES CONSERVANCY | $7,452,055 | C99 | inferred 0.50 | | Tulsa, OK | 2024 |
| ENVIRONMENTAL LAW ALLIANCE WORLDWIDE | $7,223,582 | C99 | inferred 0.50 | | Eugene, OR | 2025 |
| CHILDRENS CASE MANAGEMENT ORGANIZATION INC | $6,981,810 | C99 | published | abuse: child | West Palm Beach, FL | 2024 |
| THE CENTER FOR AN AGRICULTURAL ECONOMY | $6,856,614 | C99 | published | | Hardwick, VT | 2024 |
| ALLIANCE FOR THE GREAT LAKES | $6,835,904 | C99 | inferred 0.60 | launch: launch | Chicago, IL | 2025 |
| WETLANDS INSTITUTE | $6,688,462 | C99 | inferred 0.70 | | Stone Harbor, NJ | 2025 |
| SOUTH YUBA RIVER CITIZENS LEAGUE | $6,681,945 | C99 | inferred 0.70 | science: research education | Nevada City, CA | 2024 |
| WAFWA SPECIES RESTORATION FOUNDATION | $6,414,478 | C99 | published | | Boise, ID | 2024 |
| PROVEG INTERNATIONAL INCORPORATED | $6,350,331 | C99 | inferred 0.50 | | Pittsfield, MA | 2024 |
| THE MILLBOR FOUNDATION | $6,332,512 | C99 | inferred 0.50 | | Delray Beach, FL | 2024 |
| POOL & HOT TUB FOUNDATION | $6,210,354 | C99 | inferred 0.40 | science: research education | Alexandria, VA | 2024 |
| RESOURCE MEDIA A NONPROFIT CORPORATION | $6,202,066 | C99 | published | | Beaverton, OR | 2024 |
| GREEN SOUTH FOUNDATION INC | $6,188,525 | C99 | published | | Carrollton, GA | 2024 |
| VERMONT YOUTH CONSERVATION CORPS INC | $6,137,553 | C99 | published | | Richmond, VT | 2025 |
| NEW YORK PUBLIC INTEREST RESEARCH GROUP FUND INC | $5,799,354 | C99 | inferred 0.50 | | New York, NY | 2024 |
| MINNESOTA CENTER FOR ENVIRONMENTAL ADVOCACY | $5,512,143 | C99 | published | launch: launch | Saint Paul, MN | 2024 |
| AGRICULTURAL INSTITUTE OF MARIN | $5,491,470 | C99 | published | launch: launch | San Rafael, CA | 2024 |
| PARKS ALLIANCE OF LOUISVILLE INC | $5,293,940 | C99 | published | | Louisville, KY | 2025 |
| CONSERVATION INNOVATION FUND | $5,268,393 | C99 | published | | Washington, DC | 2024 |
| GREATER PINE ISLAND WATER ASSOCIATION INC | $5,149,024 | C99 | inferred 0.50 | | Bokeelia, FL | 2025 |
| SOUTHEASTERN WILDLIFE EXPOSITION INC | $5,139,686 | C99 | published | | Charleston, SC | 2024 |
| FEDERATION OF STATE CONSERVATION VOTER LEAGUES INC | $5,092,574 | C99 | inferred 0.50 | | Philadelphia, PA | 2024 |
| WASHINGTON COUNTY WATER CO | $4,958,018 | C99 | inferred 0.50 | | Nashville, IL | 2025 |
| FRIENDS OF CIBOLO WILDERNESS | $4,887,948 | C99 | published | | Boerne, TX | 2024 |
| GREEN RESTAURANT ORGANIZATION INC | $4,696,113 | C99 | published | | North Miami, FL | 2025 |
| HOMEWORLD COLLECTIVE INC | $4,662,687 | C99 | published | | Somerville, MA | 2024 |
| JUST TRANSITION ALLIANCE | $4,609,442 | C99 | published | | San Diego, CA | 2024 |
| FLOURISH AGENDA INC | $4,364,340 | C99 | published | | Oakland, CA | 2024 |
| TAMPA BAY HISTORY CENTER INC | $4,334,112 | C99 | published | girls boys: boys girls clubs | Tampa, FL | 2024 |
| THE STRINGER FOUNDATION | $4,291,344 | C99 | published | | New York, NY | 2025 |
| NATIONAL NETWORK OF ABORTION FUNDS ACCESS REPRODUCTIVE CARE-SOUTHEAST | $4,128,791 | C99 | published | | Atlanta, GA | 2024 |
| ALDO LEOPOLD FOUNDATION INC | $4,037,660 | C99 | inferred 0.60 | | Baraboo, WI | 2024 |
| FOREST SOCIETY OF MAINE | $4,027,130 | C99 | published | | Bangor, ME | 2024 |
| CALIFORNIA ASSOCIATION OF SANITATION AGENCIES | $3,950,373 | C99 | inferred 0.50 | | Sacramento, CA | 2024 |
| OO PROJECT | $3,862,117 | C99 | published | | Washington, DC | 2024 |
| AMERICAN LUMBER STANDARD COMMITTEE INCORPORATED | $3,815,109 | C99 | published | | Frederick, MD | 2025 |
| NATIONAL NETWORK OF ABORTION FUNDS | $3,744,865 | C99 | published | | Salem, OR | 2025 |
| FLORIDA WILDLIFE CORRIDOR FOUNDATION INC | $3,686,439 | C99 | published | girls boys: girls | St Petersburg, FL | 2024 |
| SUNRISE MOVEMENT EDUCATION FUND | $3,683,487 | C99 | published | launch: launch | Washington, DC | 2024 |
| CALIFORNIA GREEN BUILDING COUNCIL USGBC CALIFORNIA | $3,606,913 | C99 | published | | Los Angeles, CA | 2024 |
| FRIENDS OF CEDAR MESA | $3,561,345 | C99 | inferred 0.60 | | Bluff, UT | 2024 |
| FRIENDS OF THE NEW JERSEY SCHOOL OF CONSERVATION | $3,420,436 | C99 | published | | Branchville, NJ | 2024 |
| CONSERVATIVE COALITION FOR CLIMATE SOLUTIONS | $3,400,364 | C99 | inferred 0.50 | | Falls Church, VA | 2025 |
| HOOD RIVER WATERSHED GROUP | $3,344,245 | C99 | published | | Hood River, OR | 2025 |
| ENVIRONMENTAL GRANTMAKERS ASSOCIATION | $3,338,752 | C99 | published | | New York, NY | 2024 |
| LOUISIANA BUCKET BRIGADE | $3,293,989 | C99 | published | | New Orleans, LA | 2024 |
| SANTA CRUZ MOUNTAINS TRAIL STEWARDSHIP | $3,223,224 | C99 | published | | Santa Cruz, CA | 2024 |
| LATINO EQUITY ADVOCACY & POLICY INSTITUTE - THE LEAP INSTITUTE | $3,207,458 | C99 | published | | Huron, CA | 2024 |
| COLORADO CENTER FOR THE ADVANCEMENT OF PATIENT SAFETY | $3,095,820 | C99 | published | | Denver, CO | 2024 |
| NATIONAL NETWORK OF ABORTION FUNDS | $3,040,716 | C99 | published | | Austin, TX | 2024 |
| LEE COUNTY WATER ASSOCIATION INC | $3,010,698 | C99 | inferred 0.50 | | Marianna, AR | 2024 |
| COALITION FOR SUSTAINABLE INITIATIVES | $2,965,419 | C99 | published | | Whitefish Bay, WI | 2023 |
| TALIESIN PRESERVATION INC | $2,950,672 | C99 | published | | Spring Green, WI | 2024 |
| HAZON INC | $2,929,322 | C99 | inferred 0.50 | | New York, NY | 2013 |
| THE INTERNATIONAL DARK-SKY ASSOCIATION INC | $2,911,140 | C99 | inferred 0.80 | science: research education | Tucson, AZ | 2024 |
| ROBERT M LEE FOUNDATION | $2,878,916 | C99 | inferred 0.50 | domestic violence | Sparks, NV | 2025 |
| CLEAN COASTS CLEAN WATER CLEAN STREETS | $2,845,020 | C99 | inferred 0.60 | | Sacramento, CA | 2021 |
| DAILY ACTS ORGANIZATION | $2,782,672 | C99 | published | survivor: disaster | Petaluma, CA | 2024 |
| LAKE CONESTEE DAM RESTORATION FUND INC | $2,767,062 | C99 | inferred 0.80 | | Spartanburg, SC | 2023 |
| ENVIRONMENTAL COUNCIL OF STATES INC | $2,730,146 | C99 | inferred 0.70 | science: research education | Washington, DC | 2024 |
| WDH FOUNDATION-C4 | $2,703,899 | C99 | published | | Saint Louis, MO | 2024 |
| NATIONAL NETWORK OF ABORTION FUNDS | $2,672,331 | C99 | published | women: issues | Austin, TX | 2024 |
| CONSERVATION VOTERS OF SO CAROLINA | $2,654,290 | C99 | inferred 0.70 | | Columbia, SC | 2024 |
| FRIENDS OF LAUREL HILL AND WEST LAUREL HILL CEMETERIES | $2,653,482 | C99 | inferred 0.80 | | Philadelphia, PA | 2024 |
| FIBERSHED | $2,650,343 | C99 | published | | San Geronimo, CA | 2024 |
| COLORADANS FOR LOCAL CONTROL | $2,618,448 | C99 | inferred 0.60 | | Denver, CO | 2014 |
| FRONT AND CENTERED | $2,584,627 | C99 | published | | Seattle, WA | 2023 |
| MUSEUM AT ELDRIDGE STREET | $2,582,130 | C99 | published | | New York, NY | 2025 |
| ALBANY CSO POOL COMMUNITIES CORPORATION | $2,573,993 | C99 | inferred 0.50 | | Albany, NY | 2024 |
| POWER THE FUTURE INC | $2,510,373 | C99 | inferred 0.50 | | Beverly, MA | 2024 |
| NEW SPACE NEW MEXICO | $2,458,181 | C99 | published | space: outer | Albuquerque, NM | 2024 |
| GREATER MERCER TRANSPORTATION MANAGEMENT ASSOCIATION INC | $2,424,788 | C99 | inferred 0.50 | | Princeton, NJ | 2025 |
| SOUTHEASTERN BOLL WEEVIL ERADICATION FOUNDATION INC | $2,390,239 | C99 | inferred 0.50 | | Tallassee, AL | 2024 |