| MONTEREY BAY AQUARIUM FOUNDATION | $208,135,651 | D11 | published | launch: launch | Monterey, CA | 2024 |
| HOUSTON ZOO INC | $82,689,282 | D11 | published | space: outer | Houston, TX | 2024 |
| DENVER ZOOLOGICAL FOUNDATION INC | $66,039,623 | D11 | published | domestic: animals | Denver, CO | 2025 |
| SEATTLE AQUARIUM SOCIETY-SEAS | $54,098,416 | D11 | published | science: research education | Seattle, WA | 2024 |
| THE SAINT LOUIS ZOO FOUNDATION | $53,824,998 | D11 | published | | Saint Louis, MO | 2025 |
| FRIENDS OF THE ZOO INC OF KANSAS CITY MO | $53,626,478 | D11 | published | science: research education | Kansas City, MO | 2024 |
| JOHN BALL ZOO | $37,349,675 | D11 | published | science: research education | Grand Rapids, MI | 2024 |
| DALLAS ZOO MANAGEMENT INC | $36,852,417 | D11 | published | science: research education | Dallas, TX | 2024 |
| TULSA ZOO MANAGEMENT INC | $22,832,092 | D11 | published | | Tulsa, OK | 2024 |
| THE DAVID SHELDRICK WILDLIFE TRUST USA INC | $22,803,495 | D11 | published | | Laguna Hills, CA | 2025 |
| THE NORTH CAROLINA AQUARIUM SOCIETY | $21,509,307 | D11 | published | | Raleigh, NC | 2025 |
| GREATER LOS ANGELES ZOO ASSOCIATION | $21,322,996 | D11 | published | | Glendale, CA | 2024 |
| DALLAS ZOOLOGICAL SOCIETY | $20,941,997 | D11 | published | | Dallas, TX | 2024 |
| ACRC LESSOR INC | $20,277,527 | D11 | inferred 0.60 | | Baltimore, MD | 2024 |
| TENNESSEE WILDLIFE RESOURCES FOUNDATION INC | $19,778,172 | D11 | published | | Nashville, TN | 2024 |
| FRIENDS OF THE TOPEKA ZOO INC | $18,467,562 | D11 | published | | Topeka, KS | 2024 |
| FORT WAYNE ZOOLOGICAL SOCIETY INC | $18,153,771 | D11 | published | shelter: animal | Fort Wayne, IN | 2024 |
| MINNESOTA ZOO FOUNDATION | $14,486,591 | D11 | published | science: research education | Apple Valley, MN | 2024 |
| ZOOLOGICAL SOCIETY OF MILWAUKEE COUNTY | $14,059,943 | D11 | published | | Milwaukee, WI | 2025 |
| REID PARK ZOOLOGICAL SOCIETY | $13,172,020 | D11 | published | science: research education | Tucson, AZ | 2024 |
| SEWARD ASSOCIATION FOR THE ADVANCEMENT OF MARINE SCIENCE | $12,560,249 | D11 | published | science: research education | Seward, AK | 2024 |
| BLANK PARK ZOO FOUNDATION INC | $11,913,239 | D11 | published | science: research education | Des Moines, IA | 2024 |
| XERCES SOCIETY INC | $11,813,598 | D11 | published | science: research education | Portland, OR | 2024 |
| OREGON ZOO FOUNDATION | $10,717,410 | D11 | published | | Portland, OR | 2024 |
| PAWS OF WAR INC | $7,996,341 | D11 | published | shelter: animal | Nesconset, NY | 2025 |
| RIVERBANKS SOCIETY | $7,972,739 | D11 | published | | Columbia, SC | 2024 |
| TOLEDO ZOOLOGICAL SOCIETY FOUNDATION | $7,970,224 | D11 | published | science: research education | Toledo, OH | 2024 |
| OKLAHOMA ZOOLOGICAL SOCIETY INC | $7,570,293 | D11 | published | | Oklahoma City, OK | 2024 |
| ASHER HOUSE | $7,368,288 | D11 | published | abuse: animal | Salem, OR | 2024 |
| FRIENDS OF THE ZOO INC | $6,797,155 | D11 | published | | Chattanooga, TN | 2024 |
| NEW MEXICO BIOPARK SOCIETY INC | $6,651,215 | D11 | published | | Albuquerque, NM | 2024 |
| FLATBUSH CATS INC | $5,990,201 | D11 | published | shelter: animal | Brooklyn, NY | 2024 |
| GEORGIA AQUARIUM FOUNDATION INC | $5,826,763 | D11 | published | | Atlanta, GA | 2024 |
| GREAT OUTDOORS FOUNDATION | $5,586,688 | D11 | published | | Wdm, IA | 2025 |
| FRIENDS OF THE ROSAMOND GIFFORD ZOO AT BURNET PARK INC | $5,446,793 | D11 | published | | Syracuse, NY | 2025 |
| COMO FRIENDS | $5,414,890 | D11 | published | | Saint Paul, MN | 2025 |
| GROVER NELSON PARK ZOOLOGICAL FOUNDATION | $4,403,685 | D11 | published | | Tuscola, TX | 2024 |
| IDAHO ZOOLOGICAL SOCIETY | $4,166,446 | D11 | published | | Boise, ID | 2025 |
| ANIMAL DEFENSE LEAGUE FOUNDATION | $3,968,764 | D11 | published | | San Antonio, TX | 2025 |
| FRIENDS OF AT PIMA ANIMAL CARE CENTER | $3,902,249 | D11 | published | shelter: animal | Tucson, AZ | 2024 |
| DING DARLING WILDLIFE SOCIETY INC | $3,502,148 | D11 | published | science: research education | Sanibel, FL | 2024 |
| ARIZONA ELK SOCIETY | $3,485,167 | D11 | published | girls boys: girl scouts | Peoria, AZ | 2025 |
| OSHKOSH AREA HUMANE SOCIETY INC | $3,360,081 | D11 | published | shelter: animal | Oshkosh, WI | 2024 |
| ARKANSAS GAME & FISH FOUNDATION | $3,333,328 | D11 | published | women: issues | Little Rock, AR | 2024 |
| ZOOLOGICAL SOCIETY OF NEW JERSEY INC | $3,289,638 | D11 | published | | West Orange, NJ | 2024 |
| IGFA FOUNDATION INC | $3,244,294 | D11 | published | science: research education | Dania Beach, FL | 2024 |
| COLORADO ZOOLOGICAL TRUST INC | $2,904,340 | D11 | published | | Denver, CO | 2025 |
| NATIONAL AQUARIUM FOUNDATION INC | $2,731,866 | D11 | published | | Baltimore, MD | 2025 |
| LOUISVILLE ZOO FOUNDATION INC | $2,512,256 | D11 | published | | Louisville, KY | 2024 |
| PAWS HUMANE INC | $2,456,119 | D11 | published | | Columbus, GA | 2024 |
| BONEFISH & TARPON TRUST INC | $2,442,536 | D11 | published | | Miami, FL | 2025 |
| CAMERON PARK ZOOLOGICAL & BOTANICAL SOCIETY | $2,026,978 | D11 | published | | Waco, TX | 2024 |
| FRIENDS OF SANTA ANA ZOO | $2,000,158 | D11 | published | | Santa Ana, CA | 2024 |
| PLUMPTON PARK ZOOLOGICAL GARDENS INC | $1,893,584 | D11 | published | | Rising Sun, MD | 2024 |
| CAPE MAY COUNTY ZOOLOGICAL SOCIETY INC | $1,771,075 | D11 | published | | Cape May Ch, NJ | 2024 |
| FRIENDS OF CABRILLO MARINE AQUARIUM | $1,745,500 | D11 | published | | San Pedro, CA | 2024 |
| LOWRY PARK ZOO ENDOWMENT FOUNDATION INC | $1,705,044 | D11 | published | | Tampa, FL | 2024 |
| NEBRASKA HUMANE SOCIETY FOUNDATION | $1,703,917 | D11 | published | | Omaha, NE | 2024 |
| FRIENDS OF THE GREENVILLE ZOO INC | $1,676,229 | D11 | published | | Greenville, SC | 2024 |
| POINT DEFIANCE ZOOLOGICAL SOCIETY | $1,671,113 | D11 | published | | Tacoma, WA | 2025 |
| FOUNDATION FOR VETERINARY DENTISTRY | $1,476,080 | D11 | published | shelter: animal | Meridian, ID | 2025 |
| CINCINNATI ZOO FOUNDATION INC | $1,458,379 | D11 | published | | Cincinnati, OH | 2024 |
| HONOLULU ZOOLOGICAL SOCIETY | $1,411,141 | D11 | published | science: research education | Honolulu, HI | 2024 |
| THOROUGHBRED CHARITIES OF AMERICA INC | $1,337,047 | D11 | published | | Lexington, KY | 2025 |
| FRIENDS OF THE ANIMALS | $1,261,872 | D11 | published | shelter: animal | Ashland, OR | 2025 |
| MARY POWELL CRUM TR | $1,142,809 | D11 | published | | Indianapolis, IN | 2025 |
| FRIENDS OF THE ALEXANDRIA ZOO | $1,117,104 | D11 | published | | Alexandria, LA | 2025 |
| AGR FOUNDATION INC | $1,090,787 | D11 | published | | Marana, AZ | 2025 |
| ZOOLOGICAL SOCIETY OF MILWAUKEE COUNTY ENDOWMENT TR | $1,032,049 | D11 | published | | Milwaukee, WI | 2025 |
| NORTH CAROLINA WILDLIFE HABITAT FOUNDATION INC | $1,014,974 | D11 | published | | Greensboro, NC | 2024 |
| THE MISSISSIPPI ANIMAL RESCUE LEAGUE CHARITABLE TRUST | $1,013,260 | D11 | published | | Birmingham, AL | 2024 |
| GULF COAST HUMANE SOCIETY ENDOWMENT TRUST | $989,637 | D11 | published | shelter: animal | Corp Christi, TX | 2025 |
| WESTERN WEST VIRGINIA ANIMAL RESCUE ALLIANCE | $989,433 | D11 | published | shelter: animal | Huntington, WV | 2024 |
| CONSERVATION NATION | $989,290 | D11 | published | science: research education | Washington, DC | 2025 |
| THE FUR SEASONS INC | $983,040 | D11 | published | abuse: animal | Madison, WI | 2025 |
| ARKANSAS ZOOLOGICAL FOUNDATION INC | $964,135 | D11 | published | | Little Rock, AR | 2024 |
| SUNSET ZOOLOGICAL PARK AND WILDLIFE CONSERVATION TRUST FOUNDATION | $957,249 | D11 | published | science: research education | Manhattan, KS | 2025 |
| EVERETT AND ROSEMARIE BROWN FAMILY FOUNDATION 02-50467 | $945,281 | D11 | published | | Chicago, IL | 2025 |
| NHSPCA TRUST | $880,766 | D11 | published | | Stratham, NH | 2024 |
| KAY E MCFARLAND CHARITABLE TR | $814,063 | D11 | published | | Topeka, KS | 2025 |
| FRIENDS OF THE ELLEN TROUT ZOO INC | $809,254 | D11 | published | | Lufkin, TX | 2023 |
| RIVERSIDE ZOOLOGICAL FOUNDATION | $782,408 | D11 | published | | Scottsbluff, NE | 2024 |
| LOUISIANA SPCA FOUNDATION | $767,106 | D11 | published | | New Orleans, LA | 2025 |
| FRIENDS OF THE PALO ALTO JR MUSEUM AND ZOO | $722,541 | D11 | published | science: research education | Palo Alto, CA | 2024 |
| FRIENDS OF THE MANCHESTER ANIMAL SHELTER | $716,146 | D11 | published | abuse: animal | Manchester, NH | 2024 |
| DELAWARE HUMANE ASSOCIATION | $708,452 | D11 | published | shelter: animal | Wilmington, DE | 2025 |
| MONTGOMERY AREA ZOOLOGICAL SOCIETY INC | $694,430 | D11 | published | | Montgomery, AL | 2024 |
| FRIENDS OF CAMPBELL COUNTY ANIMALS | $682,796 | D11 | published | abuse: animal | Jacksboro, TN | 2024 |
| FRIENDS OF THE ISSAQUAH SALMON HATCHERY | $661,701 | D11 | published | | Issaquah, WA | 2024 |
| THE CAT SHELTER | $647,384 | D11 | published | shelter: animal | Saint Louis, MO | 2025 |
| ZOOTAH FOUNDATION INC | $621,471 | D11 | published | | Logan, UT | 2024 |
| VALLEY ZOOLOGICAL ENDOWMENT | $618,280 | D11 | published | | Brownsville, TX | 2024 |
| TAUTPHAUS PARK ZOOLOGICAL SOCIETY INC | $606,531 | D11 | published | | Idaho Falls, ID | 2025 |
| HUNT HILL NATURE CENER INC | $599,152 | D11 | published | | Sarona, WI | 2024 |
| MAS ASS ACRES SANCTUARY | $594,025 | D11 | published | | Bellevue, WA | 2025 |
| VIVIAN PORCH WELFARE LEAGUE TRUST | $589,589 | D11 | published | | Dallas, TX | 2024 |
| FRIENDS OF THE ANIMAL CENTER FOUNDATION | $586,515 | D11 | published | shelter: animal | Iowa City, IA | 2024 |
| FRIENDS OF THE BAY BEACH WILDLIFE SANCTUARY INC | $570,645 | D11 | published | | Green Bay, WI | 2025 |
| ZOOLOGICAL SOCIETY OF BUFFALO FOUNDATION INC | $560,250 | D11 | published | science: research education | Buffalo, NY | 2025 |
| ELSIE SEEGER BARTON TRUST | $553,187 | D11 | published | | Buffalo, NY | 2024 |