| NATURE CONSERVANCY | $1,746,229,436 | C30 | inferred 0.85 | launch: launch | Arlington, VA | 2024 |
| EAGLE FOUNDATION | $447,008,575 | C30 | inferred 0.50 | shelter: homeless | Omaha, NE | 2024 |
| WORLD WILDLIFE FUND INC | $366,655,209 | C30 | published | launch: launch | Washington, DC | 2024 |
| THE CONSERVATION FUND A NONPROFIT CORPORATION | $329,373,956 | C30 | published | | Arlington, VA | 2025 |
| CONSERVATION INTERNATIONAL FOUNDATION | $308,673,004 | C30 | published | science: research education | Arlington, VA | 2024 |
| WINDWARD FUND | $308,245,754 | C30 | published | | Washington, DC | 2024 |
| NATURAL RESOURCES DEFENSE COUNCIL INC | $248,922,592 | C30 | published | launch: launch | New York, NY | 2024 |
| NATIONAL AUDUBON SOCIETY INC | $197,300,511 | C30 | published | science: research education | New York, NY | 2024 |
| RAINFOREST ALLIANCE INC | $100,221,940 | C30 | inferred 0.60 | violence: sexual | New York, NY | 2024 |
| SIERRA CLUB | $83,752,990 | C30 | inferred 0.80 | | Oakland, CA | 2025 |
| RESOURCES LEGACY FUND | $79,596,936 | C30 | published | shelter: disaster | Sacramento, CA | 2024 |
| NOKUSE EDUCATION INC | $70,910,969 | C30 | published | | Freeport, FL | 2025 |
| THE NATIONAL TRUST FOR SCOTLAND | $66,982,945 | C30 | inferred 0.60 | | | 2013 |
| DUCKS UNLIMITED INC | $65,801,593 | C30 | published | | Memphis, TN | 2024 |
| MASSACHUSETTS AUDUBON SOCIETY INC | $56,198,154 | C30 | published | launch: launch | Lincoln, MA | 2024 |
| NATIONAL WILD TURKEY FEDERATION INC | $54,333,787 | C30 | published | women: issues | Edgefield, SC | 2024 |
| IOWA NATURAL HERITAGE FOUNDATION | $53,249,669 | C30 | published | | Des Moines, IA | 2024 |
| THE MARISLA FOUNDATION | $51,974,750 | C30 | inferred 0.85 | science: research education | Laguna Beach, CA | 2024 |
| STUDENT CONSERVATION ASSOCIATION INC | $48,435,405 | C30 | inferred 0.55 | science: research education | Arlington, VA | 2024 |
| GREAT BARRIER REEF FOUNDATION USA INC | $47,806,244 | C30 | published | | Washington, DC | 2024 |
| SUSTAINABLE MARKETS FOUNDATION | $47,524,141 | C30 | published | | New York, NY | 2024 |
| EARTH ISLAND INSTITUTE INC | $41,631,441 | C30 | published | domestic: animals | Berkeley, CA | 2024 |
| RIVER PARTNERS | $41,176,482 | C30 | published | | Chico, CA | 2024 |
| CLEAN FUTURE FORUM INC | $35,405,711 | C30 | published | | Washington, DC | 2024 |
| ELEMENTAL EXCELERATOR INC | $34,110,366 | C30 | published | women: issues | Honolulu, HI | 2024 |
| NIA TERO FOUNDATION | $32,904,805 | C30 | published | women: issues | Seattle, WA | 2024 |
| SIERRA CLUB FOUNDATION | $31,947,339 | C30 | published | women: issues | Oakland, CA | 2025 |
| MATHWIG FAMILY CHARITABLE TR | $30,488,501 | C30 | published | | St Louis Park, MN | 2025 |
| SANTA CATALINA ISLAND CONSERVANCY | $30,190,954 | C30 | inferred 0.80 | | Avalon, CA | 2024 |
| CHRISTENSEN FUND | $25,633,170 | C30 | published | violence: prevention | San Francisco, CA | 2024 |
| BLUE INVESTMENTS FOR NATURE INC | $25,277,092 | C30 | published | | Arlington, VA | 2024 |
| ENVIRONMENTAL DEFENSE ACTION FUND | $24,647,599 | C30 | published | | New York, NY | 2024 |
| COMPATIBLE LANDS FOUNDATION INC | $24,629,833 | C30 | published | | Pryor, OK | 2024 |
| NATIONAL RECREATION & PARK ASSOCIATION | $24,296,620 | C30 | published | | Ashburn, VA | 2024 |
| COUNCIL ON THE ENVIRONMENT INC | $24,139,448 | C30 | published | | New York, NY | 2024 |
| SUMMIT LAND CONSERVANCY | $22,495,539 | C30 | published | girls boys: girl scouts | Park City, UT | 2025 |
| PUERTO RICO CONSERVATION TRUST | $21,417,171 | C30 | published | violence: prevention | San Juan, PR | 2024 |
| THE ALLIANCE FOR CLIMATE PROTECTION | $21,072,350 | C30 | published | | Washington, DC | 2025 |
| SUTTER BUTTES REGIONAL LAND TRUST | $20,432,646 | C30 | inferred 0.85 | | Yuba City, CA | 2024 |
| NORTHEAST WILDERNESS TRUST | $19,585,696 | C30 | published | science: research education | Montpelier, VT | 2024 |
| PARA LA NATURALEZA INC | $18,329,247 | C30 | published | science: research education | San Juan, PR | 2024 |
| ECOLOGY CENTER | $18,141,347 | C30 | published | | Berkeley, CA | 2024 |
| NANTUCKET CONSERVATION FOUNDATION INC | $17,537,027 | C30 | published | science: research education | Nantucket, MA | 2024 |
| Rhode Island Fishermens Future Viability | $17,284,139 | C30 | inferred 0.35 | | North Kingstown, RI | 2025 |
| GRAND CANYON TRUST INC | $16,995,292 | C30 | published | science: research education | Flagstaff, AZ | 2025 |
| NATIONAL WILD TURKEY FEDERATION INC | $15,761,083 | C30 | published | | Edgefield, SC | 2024 |
| ALABAMA RESOURCE CONSERVATION AND DEVELOPMENT COUNCIL INC | $15,708,769 | C30 | published | | Montgomery, AL | 2024 |
| ENVIRONMENT AMERICA INC | $15,053,495 | C30 | published | | Denver, CO | 2024 |
| WESTERN CONSERVATION FOUNDATION | $14,580,557 | C30 | published | girls boys: boy scouts | Denver, CO | 2024 |
| NORTH CAROLINA LEAGUE OF CONSERVATION VOTERS FOUNDATION INC | $14,480,630 | C30 | published | | Raleigh, NC | 2024 |
| WHITETAILS UNLIMITED INC | $14,337,122 | C30 | published | women: issues | Sturgeon Bay, WI | 2024 |
| BEZOS EARTH FUND FOUNDATION | $14,089,333 | C30 | published | | Washington, DC | 2024 |
| NATURAL HERITAGE TRUST | $13,545,700 | C30 | inferred 0.60 | | Albany, NY | 2025 |
| HARWICH CONSERVATION TR | $13,429,366 | C30 | published | | South Harwich, MA | 2025 |
| FRIENDS OF THE OSA | $13,421,883 | C30 | published | science: research education | Washington, DC | 2024 |
| ISLAND CONSERVATION | $13,417,416 | C30 | published | science: research education | Santa Cruz, CA | 2024 |
| RESEARCH CENTER ON NATURAL CONSERVATION INC | $13,304,897 | C30 | published | | Harriman, NY | 2024 |
| THE NATOMAS BASIN CONSERVANCY A CA NON-PROFIT PUBLIC BENEFIT CORP | $12,612,367 | C30 | published | | Sacramento, CA | 2025 |
| CALIFORNIA ASSOC OF RESOURCE CONSERVATION DISTRICTS | $12,530,192 | C30 | published | | Sacramento, CA | 2024 |
| ENVIRONMENTAL LAW & POLICY CENTER OF THE MIDWEST | $12,058,051 | C30 | published | | Chicago, IL | 2024 |
| NATURE FOR JUSTICE | $11,883,909 | C30 | published | | Falls Church, VA | 2025 |
| OCEANTIC NETWORK INC | $11,861,147 | C30 | published | science: research education | Baltimore, MD | 2024 |
| OPENLANDS | $11,496,900 | C30 | inferred 0.85 | science: research education | Chicago, IL | 2024 |
| COUNCIL ON LIBRARY AND INFORMATION RESOURCES | $11,315,817 | C30 | published | science: research education | Alexandria, VA | 2024 |
| RUFFED GROUSE SOCIETY | $10,982,779 | C30 | published | science: research education | Pittsburgh, PA | 2025 |
| RED RIVER BASIN COMMISSION | $10,912,615 | C30 | inferred 0.60 | | Fargo, ND | 2024 |
| SOUTHERN IOWA RURAL WATER | $10,741,641 | C30 | inferred 0.55 | | Creston, IA | 2013 |
| HARBOR SHORES PUBLIC ASSET FUND INC | $10,693,057 | C30 | published | girls boys: boys girls clubs | Benton Harbor, MI | 2025 |
| GRANDFATHER MOUNTAIN STEWARDSHIP FOUNDATION INC | $10,453,680 | C30 | published | girls boys: girl scouts | Linville, NC | 2024 |
| LOMAKATSI RESTORATION PROJECT | $10,320,983 | C30 | published | | Ashland, OR | 2024 |
| MOBILIZEGREEN INC | $9,905,136 | C30 | published | | Washington, DC | 2024 |
| GREEN EDUCATION FOUNDATION | $9,618,167 | C30 | published | | San Jose, CA | 2024 |
| GLOBAL ENERGY MONITOR | $9,612,516 | C30 | published | | Covina, CA | 2024 |
| STRATEGIC ENERGY INNOVATIONS | $9,470,163 | C30 | published | science: research education | San Rafael, CA | 2024 |
| OCEANS UNMANNED INC | $9,469,821 | C30 | published | | Santa Barbara, CA | 2025 |
| CALIFORNIA NATIVE PLANT SOCIETY | $9,459,830 | C30 | published | science: research education | Sacramento, CA | 2024 |
| SOS INTERNATIONAL INC | $9,435,929 | C30 | inferred 0.60 | | Louisville, KY | 2024 |
| ALLIANCE OF ROUGE COMMUNITIES | $9,318,456 | C30 | published | | Canton, MI | 2024 |
| NATURES CAPITAL INC | $9,221,357 | C30 | published | | Arlington, VA | 2024 |
| LEGACY PHILANTHROPY WORKS | $9,174,277 | C30 | published | launch: launch | Santa Barbara, CA | 2024 |
| IRVINE RANCH CONSERVANCY | $9,027,560 | C30 | published | | Irvine, CA | 2024 |
| INATURALIST | $9,011,958 | C30 | published | science: research education | San Rafael, CA | 2025 |
| BLUE FOREST FINANCE INC | $8,932,160 | C30 | published | | Sacramento, CA | 2024 |
| OYSTER RECOVERY PARTNERSHIP INC | $8,815,883 | C30 | inferred 0.80 | science: research education | Annapolis, MD | 2025 |
| FRANK AND SHEILA MAGULLION FOUNDATION INC | $8,780,899 | C30 | published | | Boston, MA | 2024 |
| CORAL RESTORATION FOUNDATION INC | $8,756,499 | C30 | published | science: research education | Tavernier, FL | 2024 |
| NORTH COAST RESOURCE CONSERVATION & DEVELOPMENT COUNCIL | $8,601,902 | C30 | published | | Santa Rosa, CA | 2024 |
| CHANTECAILLE FAMILY FOUNDATION | $8,585,665 | C30 | published | | Greenwich, CT | 2024 |
| NEW JERSEY AUDUBON SOCIETY | $8,469,012 | C30 | published | launch: launch | Bernardsville, NJ | 2024 |
| BLUEGREEN ALLIANCE FOUNDATION | $8,428,202 | C30 | published | | Minneapolis, MN | 2025 |
| ONLY ONE INC | $8,394,798 | C30 | published | science: research education | New York, NY | 2024 |
| THE CONNECTICUT AUDUBON SOCIETY INCORPORATED | $8,368,989 | C30 | published | science: research education | Fairfield, CT | 2024 |
| FOSSIL RIM WILDLIFE CENTER INC | $8,339,695 | C30 | published | science: research education | Glen Rose, TX | 2025 |
| SANIBEL-CAPTIVA CONSERVATION FOUNDATION INC | $8,327,277 | C30 | published | | Sanibel, FL | 2024 |
| SAPPHIRE DREAMS NEW YORK CORP | $8,228,812 | C30 | published | | New York, NY | 2024 |
| ALASKA CONSERVATION FOUNDATION | $8,028,097 | C30 | published | science: research education | Anchorage, AK | 2024 |
| LANCASTER COUNTY CONSERVANCY | $8,024,492 | C30 | published | launch: launch | Lancaster, PA | 2025 |
| PACHAMAMA ALLIANCE | $7,874,749 | C30 | published | launch: launch | San Francisco, CA | 2025 |
| CLIMATE SOLUTIONS | $7,604,672 | C30 | inferred 0.60 | | Seattle, WA | 2024 |
| SHERIFFS MEADOW FOUNDATION | $7,476,285 | C30 | published | | West Tisbury, MA | 2024 |