| U S GREEN BUILDING COUNCIL INC | $50,309,478 | C03 | published | science: research education | Washington, DC | 2024 |
| LAND TRUST ALLIANCE INCORPORATED | $22,350,355 | C03 | published | | Washington, DC | 2024 |
| NATIONAL ASSOCIATION OF CONSERVATION DISTRICTS INC | $19,293,176 | C03 | published | | Washington, DC | 2024 |
| ZION NATURAL HISTORY ASSOCIATION | $14,094,530 | C03 | published | science: research education | Springdale, UT | 2025 |
| GREEN BLUE INSTITUTE | $10,698,025 | C03 | published | space: outer | Charlottesvle, VA | 2024 |
| NATURESERVE | $8,529,867 | C03 | published | science: research education | Arlington, VA | 2024 |
| ECOLOGICAL SOCIETY OF AMERICA INC | $7,667,079 | C03 | published | science: research education | Washington, DC | 2024 |
| CREO FAMILY OFFICE SYNDICATE | $7,617,547 | C03 | published | | New York, NY | 2024 |
| NORTH AMERICAN ASSOCIATION FOR ENVIRONMENTAL EDUCATION | $7,361,766 | C03 | published | science: research education | Washington, DC | 2024 |
| PARTNERSHIP PROJECT ACTION FUND | $7,081,382 | C03 | published | | Washington, DC | 2024 |
| DELAWARE ASSOCIATION OF CONSERVATION DISTRICTS | $6,722,950 | C03 | published | | Dover, DE | 2025 |
| ARIZONA ASSOCIATION OF CONSERVATION DISTRICTS INC | $6,529,256 | C03 | published | | Tempe, AZ | 2025 |
| AMERICAN BIOGAS COUNCIL | $5,869,178 | C03 | published | science: research education | Washington, DC | 2024 |
| NORTHEAST STATES FOR COORDINATED AIR USE MANAGEMENT INC | $5,760,707 | C03 | published | science: research education | Boston, MA | 2024 |
| SOLID WASTE ASSOCIATION OF NORTH AMERICA INC | $5,379,937 | C03 | published | | Silver Spring, MD | 2024 |
| RESIDENTIAL ENERGY SERVICES NETWORK INC | $4,313,671 | C03 | published | | Moorpark, CA | 2024 |
| GEORGIA ASSOCIATION OF WATER PROFESSIONALS INC | $4,151,326 | C03 | published | science: research education | Marietta, GA | 2025 |
| AMERICAN PUBLIC GARDENS ASSOCIATION | $3,774,374 | C03 | published | science: research education | Wilmington, DE | 2025 |
| WATER PROFESSIONALS INTERNATIONAL | $3,674,889 | C03 | published | | Urbandale, IA | 2024 |
| ALABAMA RURAL WATER ASSOCIATION | $3,325,113 | C03 | inferred 0.50 | | Montgomery, AL | 2024 |
| NEW MEXICO ASSOCIATION OF SOIL AND WATER CONSERVATION DISTRICTS | $3,253,333 | C03 | published | | Carlsbad, NM | 2024 |
| MASSACHUSETTS HORTICULTURAL SOCIETY | $3,199,868 | C03 | published | | Wellesley, MA | 2024 |
| NATIONAL GARDEN CLUBS INCORPORATED | $2,891,058 | C03 | published | shelter: disaster | Saint Louis, MO | 2024 |
| ASSOCIATION OF ILLINOIS SOIL & WATER CONSERVATION DISTRICTS | $2,588,593 | C03 | inferred 0.50 | | Springfield, IL | 2024 |
| INDIANA ASSOCIATION OF SOIL & WATER | $2,586,583 | C03 | published | | Indianapolis, IN | 2024 |
| ALASKA ASSOCIATION OF CONSERVATION DISTRICTS | $2,450,940 | C03 | published | | Wasilla, AK | 2024 |
| OKLAHOMA ASSOCIATION OF CONSERVATION DISTRICTS INCORPORATE | $2,379,289 | C03 | published | | Oklahoma City, OK | 2024 |
| AIR AND WASTE MANAGEMENT ASSOCIATION | $2,338,619 | C03 | published | | Pittsburgh, PA | 2024 |
| PUBLIC EMPLOYEES FOR ENVIRONMENTAL RESPONSIBILITY INC | $2,229,404 | C03 | published | | Silver Spring, MD | 2024 |
| CONTROLLED RELEASE SOCIETY INC | $2,208,969 | C03 | published | science: research education | Mount Laurel, NJ | 2024 |
| INTERNATIONAL ASSOCIATION FOR IMPACT ASSESSMENT INC | $2,161,328 | C03 | published | women: issues | Fargo, ND | 2024 |
| ISLAND PRESS | $2,063,339 | C03 | published | violence: gun | Washington, DC | 2025 |
| NEW ENGLAND WATER ENVIRONMENT ASSOC | $1,936,979 | C03 | published | | Woburn, MA | 2024 |
| SOCIETY OF ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY | $1,871,268 | C03 | inferred 0.70 | science: research education | Washington, DC | 2025 |
| COLORADO COALITION OF LAND TRUSTS | $1,850,559 | C03 | published | | Lakewood, CO | 2025 |
| AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE | $1,805,641 | C03 | published | science: research education | Alexandria, VA | 2024 |
| ENERGY TECHNOLOGY AND ENVIRONMENTAL BUSINESS ASSOCIATION | $1,783,778 | C03 | inferred 0.50 | | Oak Ridge, TN | 2025 |
| MICHIGAN NATURE ASSOCIATION | $1,741,068 | C03 | published | | Okemos, MI | 2024 |
| SOUTH DAKOTA ASSOCIATION OF CONSERVATIONS DISTRICTS INC | $1,736,638 | C03 | published | | Pierre, SD | 2024 |
| NEW JERSEY WATER ENVIRONMENT ASSOC | $1,706,774 | C03 | published | | West Paterson, NJ | 2024 |
| ASSOCIATION OF STATE DRINKING WATER ADMINISTRATORS | $1,647,444 | C03 | published | | Arlington, VA | 2025 |
| WECONSERVEPA | $1,607,278 | C03 | published | | Harrisburg, PA | 2025 |
| MINNESOTA ASSOCIATION OF SOIL AND | $1,605,065 | C03 | published | | Saint Paul, MN | 2024 |
| SOLID WASTE TRAINING INSTITUTE | $1,495,463 | C03 | published | | Syracuse, UT | 2024 |
| U S GREEN BUILDING COUNCIL-ILLINOIS CHAPTER | $1,492,264 | C03 | published | | Chicago, IL | 2025 |
| SOIL AND WATER CONSERVATION SOCIETY | $1,444,130 | C03 | published | science: research education | Ankeny, IA | 2025 |
| MICHIGAN WATER ENVIRONMENT ASSOCIATION INC | $1,422,853 | C03 | published | | Lansing, MI | 2025 |
| NC FOUNDATION FOR SOIL AND WATER CONSERVATION INC | $1,402,615 | C03 | published | | Greensboro, NC | 2024 |
| SUSTAINABLEITORG INC | $1,399,994 | C03 | published | | Minneapolis, MN | 2024 |
| WATER ENVIRONMENT ASSOCIATION OF SOUTH CAROLINA | $1,341,736 | C03 | published | | Lexington, SC | 2024 |
| NATIONAL ASSOCIATION OF RC & D COUNCILS INC | $1,341,663 | C03 | published | | Dothan, AL | 2024 |
| SUSTAINABLE TERMINAL SERVICES INC | $1,296,398 | C03 | published | | Bayonne, NJ | 2025 |
| ALABAMA ASSOCIATION OF CONSERVATION DISTRICTS | $1,237,135 | C03 | published | | Montgomery, AL | 2024 |
| CALIFORNIA URBAN WATER AGENCIES | $1,221,886 | C03 | published | science: research education | Walnut Creek, CA | 2024 |
| TEXAS FLOODPLAIN MANAGEMENTASSOCIATION | $1,206,007 | C03 | published | | Leander, TX | 2025 |
| PESTICIDE APPLICATORS PROFESSIONAL ASSOCIATION INC | $1,200,775 | C03 | published | | Sacramento, CA | 2025 |
| ASSOCIATION OF STATE WETLAND MANAGERS INC | $1,170,384 | C03 | published | science: research education | Portland, ME | 2024 |
| RENEW NORTHEAST INC | $1,167,968 | C03 | published | | Madison, CT | 2025 |
| THE OHIO WATER ENVIRONMENT ASSOCIATION | $1,167,182 | C03 | published | science: research education | Columbus, OH | 2024 |
| ASSOCIATION OF NEW JERSEY ENVIRONMENTAL COMMISSIONS | $1,130,225 | C03 | published | | Mendham, NJ | 2024 |
| MASSACHUSETTS ASSOCIATION OF CONSERVATION DISTRICTS | $1,129,337 | C03 | published | | Westford, MA | 2023 |
| BLACK ENVIRONMENTAL LEADERS ASSOCIATION | $1,079,075 | C03 | published | | Solon, OH | 2024 |
| PACIFIC NORTHWEST POLLUTION CONTROL ASSOCIATION | $1,055,321 | C03 | published | girls boys: boy scouts | Gig Harbor, WA | 2024 |
| CALIFORNIA RESOURCE REC ASSOC | $1,045,968 | C03 | published | | W Sacramento, CA | 2024 |
| ENERGY & ENVIRONMENTAL BUILDING ASSOCIATION | $1,015,241 | C03 | published | science: research education | Minneapolis, MN | 2025 |
| FLORIDA CHAPTER OF THE INTL SOCIETY OF ARBORICULTURE INC | $992,654 | C03 | published | | Clearwater, FL | 2025 |
| AMERICAN COAL ASH ASSOCIATION INC | $983,217 | C03 | inferred 0.55 | | Sandy, UT | 2025 |
| WEED SCIENCE SOCIETY OF AMERICA | $878,992 | C03 | published | science: research education | Eaton, CO | 2023 |
| BUILD IT GREEN | $861,880 | C03 | published | | Oakland, CA | 2024 |
| PRODUCED WATER SOCIETY INC | $858,313 | C03 | published | | Austin, TX | 2025 |
| THE CRANE INSTITUTE OF SUSTAINABILITY INC | $855,287 | C03 | published | | Manchester, MA | 2025 |
| CENTER FOR CIVIC INNOVATION INC | $783,643 | C03 | published | launch: launch | Atlanta, GA | 2023 |
| CENTRAL CALIFORNIA JOINT CABLE- FISHERIES LIAISON COMMITTEE | $777,247 | C03 | published | | Morro Bay, CA | 2025 |
| NATIONAL CONSERVATION FOUNDATION | $768,169 | C03 | published | | Washington, DC | 2024 |
| SOCIETY OF WETLAND SCIENTISTS INC | $748,763 | C03 | published | science: research education | Mclean, VA | 2025 |
| AMERICAN WATER RESOURCES ASSOCIATION | $735,326 | C03 | published | | Middleburg, VA | 2024 |
| MISSOURI SOIL & WATER CONSERVATION DISTRICTS | $727,139 | C03 | published | | Jefferson City, MO | 2025 |
| MISSISSIPPI ASSOCIATION OF CONSERVATION DISTRICTS INC | $720,384 | C03 | published | | Jackson, MS | 2024 |
| VIRGINIA ASSOCIATION OF SOIL AND WATER CONSERVATION DISTRICTS EDUCA | $719,324 | C03 | published | | Mechanicsvlle, VA | 2024 |
| FLORIDA FEDERATION OF GARDEN CLUBS INC | $713,755 | C03 | published | | Winter Park, FL | 2025 |
| NATIONAL ASSOCIATION OF ENVIRONMENTAL PROFESSIONALS INC | $713,186 | C03 | published | | Seattle, WA | 2025 |
| SOURCE EVALUATION SOCIETY | $699,196 | C03 | inferred 0.55 | science: research education | Rtp, NC | 2024 |
| CENTRAL STATES WATER POLLUTION CONTROL ASSOCIATION INC | $694,479 | C03 | published | | Crystal Lake, IL | 2025 |
| TREE FUND-TREE RESEARCH & EDUCATION ENDOWMENT FUND | $686,919 | C03 | published | science: research education | Naperville, IL | 2024 |
| NORTH AMERICAN LAKE MANAGEMENT SOCIETY | $675,527 | C03 | published | science: research education | Madison, WI | 2024 |
| NEW HAMPSHIRE TIMBERLAND OWNERS ASSOC | $673,683 | C03 | inferred 0.60 | | Concord, NH | 2024 |
| YELLOWSTONE RIVER PARKS ASSOCIATION INC | $660,074 | C03 | published | | Billings, MT | 2024 |
| WESTPORT WOMANS CLUB INC | $640,084 | C03 | published | | Westport, CT | 2024 |
| INDIANA WATER ENVIRONMENT ASSOCIATION INC | $594,489 | C03 | published | | Indianapolis, IN | 2024 |
| SOUTHEASTERN STATES AIR RESOURCE MANAGERS INC | $593,792 | C03 | published | | Tallahassee, FL | 2024 |
| CHEMEKETA PARK MUTUAL WATER CO | $582,808 | C03 | published | | Redwood Est, CA | 2024 |
| TAMPA FEDERATION OF GARDEN CLUB CIRCLES INC | $558,138 | C03 | published | | Tampa, FL | 2024 |
| FIRE SAFE SAN MATEO COUNTY INC | $533,613 | C03 | published | | Portola Valley, CA | 2024 |
| HIGH AMBITION CLIMATE COLLECTIVE | $525,000 | C03 | published | | San Francisco, CA | 2024 |
| NORTH AMERICAN PROCESS TECHNOLOGY ALLIANCE NAPTA | $522,292 | C03 | published | | Deer Park, TX | 2025 |
| ASSOCIATION OF ENVIRONMENTAL AND RESOURCE ECONOMISTS | $521,295 | C03 | published | | Altamonte Spg, FL | 2024 |
| PENNSYLVANIA WATER ENVIRONMENT ASSOCIATION | $517,767 | C03 | published | | Harrisburg, PA | 2024 |
| COASTAL GEORGIA INDICATORS COALITION INC | $507,000 | C03 | published | | Savannah, GA | 2025 |
| INTERNATIONAL WATER INITIATIVE FOR SANITATION AND HYGIENE INC | $492,691 | C03 | published | | Ontario, CA | 2025 |
| SOLID WASTE ASSOCIATION OF NORTH AMERICA INC | $491,881 | C03 | published | | Grapevine, TX | 2024 |