| FLORIDA VETERINARY MEDICINE FACULTY ASSOCIATION INC | $29,915,803 | D03 | published | science: research education | Gainesville, FL | 2024 |
| AMERICAN ASSOCIATION OF ZOOLOGICAL PARKS AND AQUARIUMS INC | $20,870,405 | D03 | published | science: research education | Silver Spring, MD | 2024 |
| AMERICAN COLLEGE OF VETERINARY INTERNAL MEDICINE | $9,890,255 | D03 | inferred 0.85 | science: research education | Englewood, CO | 2024 |
| AAALAC INTERNATIONAL INC | $9,709,785 | D03 | published | science: research education | Frederick, MD | 2025 |
| AMERICAN QUARTER HORSE FOUNDATION | $7,735,820 | D03 | published | science: research education | Amarillo, TX | 2024 |
| AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE AALAS | $5,273,205 | D03 | published | launch: space | Memphis, TN | 2024 |
| NATIVE AMERICAN FISH & WILDLIFE SOCIETY | $4,686,340 | D03 | published | | Northglenn, CO | 2025 |
| THE WILDLIFE SOCIETY | $3,234,614 | D03 | published | science: research education | Bethesda, MD | 2024 |
| TEXAS VETERINARY MEDICAL ASSOCIATION | $3,176,350 | D03 | inferred 0.80 | | Austin, TX | 2024 |
| THE INTERNATIONAL CAT ASSOCIATION INC | $2,789,491 | D03 | published | | Harlingen, TX | 2024 |
| ANIMAL & VEGAN ADVOCACY INTERNATIONAL INC | $2,550,082 | D03 | published | | Washington, DC | 2024 |
| AMERICAN SADDLEBRED HORSE AND BREEDERS ASSOCIATION INC | $2,542,385 | D03 | published | | Lexington, KY | 2024 |
| AMERICAN COLLEGE OF VETERINARY PATHOLOGISTS | $2,499,942 | D03 | published | science: research education | Schaumburg, IL | 2024 |
| AMERICAN SOCIETY OF ANIMAL SCIENCE INC | $2,434,587 | D03 | inferred 0.55 | science: research education | Champaign, IL | 2024 |
| VETERINARY HOSPITAL MANAGERS ASSOCIATION INC | $2,427,771 | D03 | inferred 0.60 | | Alachua, FL | 2024 |
| ASSOCIATION FOR ANIMAL WELFARE ADVANCEMENT | $2,334,665 | D03 | inferred 0.70 | | Surprise, AZ | 2025 |
| AMERICAN BIRDING ASSOCIATION INC | $2,118,882 | D03 | published | | Colorado Spgs, CO | 2025 |
| MARYLAND HORSE BREEDERS ASSOCIATION INC | $1,831,685 | D03 | published | | Reisterstown, MD | 2024 |
| AMERICAN ASSOCIATION OF SWINE VETERINARIANS | $1,824,847 | D03 | inferred 0.75 | | Perry, IA | 2024 |
| MINNESOTA VETERINARY MEDICAL ASSOCIATION | $1,581,278 | D03 | inferred 0.85 | | South St Paul, MN | 2024 |
| SOCIETY FOR INTEGRATIVE AND COMPARATIVE BIOLOGY | $1,507,605 | D03 | published | science: research education | Herndon, VA | 2024 |
| AMERICAN SOCIETY OF MAMMALOGISTS | $1,501,539 | D03 | published | | Topeka, KS | 2025 |
| BLOOD ORIGINS INC | $1,407,915 | D03 | published | | Collierville, TN | 2024 |
| ASSOCIATION OF VETERINARY LABORATORY DIAGNOSTICIANS INC | $1,246,868 | D03 | published | science: research education | Porterville, CA | 2024 |
| NEW YORK STATE VETERINARY MEDICAL SOCIETY INC | $1,164,665 | D03 | published | | Albany, NY | 2024 |
| WISCONSIN VETERINARY MEDICAL ASSOCIATION | $1,047,993 | D03 | inferred 0.85 | | Madison, WI | 2025 |
| INTL SOCIETY FOR EQUINE LOCOMOTOR PATHOLOGY INC | $1,047,711 | D03 | published | | Middleburg, VA | 2025 |
| STATE HUMANE ASSOCIATION OF CALIFORNIA | $1,044,536 | D03 | published | | Penn Valley, CA | 2024 |
| ILLINOIS STANDARDBRED ASSOCIATION | $1,022,088 | D03 | published | | Cantrall, IL | 2025 |
| AMERICAN BOARD OF VETERINARY PRACTITIONERS INC | $994,507 | D03 | inferred 0.60 | | Mt Juliet, TN | 2024 |
| IOWA VETERINARY MEDICAL ASSOCIATION | $992,777 | D03 | inferred 0.60 | | Ankeny, IA | 2024 |
| ASSOCIATION OF AVIAN VETERINARIANS INC | $983,467 | D03 | published | science: research education | Watkinsville, GA | 2024 |
| WASHINGTON STATE VETERINARY MEDICAL ASSN | $960,071 | D03 | inferred 0.85 | | Redmond, WA | 2024 |
| FLATHEAD LIVESTOCK SALE ORGANIZATION | $958,789 | D03 | published | | Kalispell, MT | 2024 |
| AMERICAN COLLEGE OF LABORATORY ANIMAL MEDCINE | $905,632 | D03 | published | science: research education | Chester, NH | 2024 |
| EASTERN PENNSYLVANIA REINING HORSE ASSOCIATION | $794,095 | D03 | published | | Gettysburg, PA | 2024 |
| UNITED STATES ANIMAL HEALTH | $781,781 | D03 | inferred 0.40 | science: research education | Saint Joseph, MO | 2024 |
| AMERICAN HOLISTIC VETERINARY MEDICAL ASSOCIATION | $739,443 | D03 | published | | Fayetteville, TN | 2025 |
| LOUISIANA WILDLIFE AGENTS ASSOCIATION INC | $736,672 | D03 | published | | St Martinvlle, LA | 2024 |
| TEXAS HEREFORD ASSOCIATION | $672,595 | D03 | inferred 0.70 | | Fort Worth, TX | 2023 |
| ACADEMY OF VETERINARY CONSULTANTS INC | $617,380 | D03 | inferred 0.80 | | Fort Collins, CO | 2025 |
| COLORADO ASSOCIATION OF CERTIFIED VETERINARY TECHNICIANS INC | $614,617 | D03 | inferred 0.70 | | Denver, CO | 2024 |
| NEW ENGLAND VETERINARY MEDICAL ASSOCIATION | $589,101 | D03 | published | science: research education | Portland, ME | 2024 |
| PENNSYLVANIA SOCIETY FOR BIOMEDICAL RESEARCH | $573,993 | D03 | published | science: research education | Camp Hill, PA | 2024 |
| ANIMAL BEHAVIOR SOCIETY INC | $541,157 | D03 | published | science: research education | Glenview, IL | 2024 |
| AMERICAN BLACK HEREFORD ASSOC INC | $528,083 | D03 | published | | Jefferson Cty, MO | 2024 |
| INTERNATIONAL VETERINARY ACUPUNCTURE SOCIETY INC | $517,424 | D03 | published | | Portland, TX | 2024 |
| AMERICAN COLLEGE OF VETERINARY ANESTHESIOLOGISTS | $516,257 | D03 | published | | Plymouth, MN | 2024 |
| NORTHEAST ASSOCIATION OF FISH AND WILDLIFE RESOURCES AGENCY | $505,635 | D03 | published | science: research education | Petersburgh, NY | 2024 |
| LOUISANA VETERINARY MEDICAL | $451,244 | D03 | published | science: research education | Baton Rouge, LA | 2024 |
| VIRGINIA FEDERATION OF HUMANE | $445,084 | D03 | published | abuse: animal | Colonial Bch, VA | 2024 |
| NORTH CAROLINA ABERDEEN ANGUS BREEDERS ASSOCIATION INC | $430,255 | D03 | published | | Castalia, NC | 2025 |
| ASSOCIATION OF SHELTER VETERINARIANS INC | $425,455 | D03 | published | shelter: animal | Apex, NC | 2025 |
| ATLANTIC REINED COW HORSE ASSOCIATION | $419,786 | D03 | published | | Collegeville, PA | 2024 |
| WILLIAMSON ANIMAL SERVICES INC | $389,454 | D03 | published | shelter: animal | Brentwood, TN | 2025 |
| DARKE COUNTY AGRICULTURAL SOCIETY | $377,501 | D03 | published | | Greenville, OH | 2023 |
| AMERICAN ASSOCIATION OF EQUINE VETERINARY TECHNICIANS | $370,306 | D03 | published | | Burleson, TX | 2024 |
| UNITED PROFESSIONAL HORSEMENS ASSOCIATION CHAPTER 14 INC | $360,101 | D03 | published | | Halifax, MA | 2024 |
| ASSOCIATION OF PRIMATE VETERINARIANS | $350,884 | D03 | published | | Memphis, TN | 2024 |
| MARYLAND HORSE FOUNDATION INC | $350,114 | D03 | published | | Reisterstown, MD | 2025 |
| A WORLD OF GOOD INITIATIVE INC | $335,329 | D03 | published | | Dover, DE | 2025 |
| NATIONAL WILDLIFE REHABILITATORS ASSOCIATION | $333,666 | D03 | published | | Bloomington, MN | 2024 |
| ASSOCIATION OF REPTILION AND AMPHIBIAN VETERINARIANS | $311,308 | D03 | published | | Mt Juliet, TN | 2024 |
| INTERNATIONAL MARINE ANIMAL TRAINERS ASSOCIATION | $302,759 | D03 | inferred 0.60 | | Copley, OH | 2024 |
| INTERNATIONAL ASSOCIATION FOR AQUATIC ANIMAL MEDICINE | $298,562 | D03 | published | science: research education | Stamford, CT | 2025 |
| INTERNATIONAL VETERINARY ACADEMY OF PAIN MANAGEMENT | $282,635 | D03 | published | | Branchburg, NJ | 2025 |
| TEXAS ORNITHOLOGICAL SOCIETY | $258,724 | D03 | published | | Corp Christi, TX | 2024 |
| SANTA BARBARA KENNEL CLUB | $252,542 | D03 | published | | Santa Barbara, CA | 2024 |
| NATIONAL SHELLFISHERIES ASSOCIATION | $248,470 | D03 | published | science: research education | Canada | 2024 |
| AMERICAN COLLEGE OF THERIOGENOLOGISTS | $247,569 | D03 | inferred 0.80 | domestic: animals | Providence, RI | 2024 |
| AMERICAN COLLEGE OF VETERINARY BEHAVIORISTS | $244,029 | D03 | published | | Providence, RI | 2024 |
| PIXELS POSSE INC | $243,441 | D03 | published | abuse: animal | Orrington, ME | 2025 |
| COLORADO FEDERATION OF ANIMAL WELFARE AGENCIES | $233,398 | D03 | published | | Denver, CO | 2025 |
| AMERICAN FEDERATION OF AVICULTURE | $231,636 | D03 | published | | Austin, TX | 2025 |
| INTERNATIONAL WORKING DOG BREEDING ASSOCIATION | $215,570 | D03 | published | | San Antonio, TX | 2024 |
| PLYMOUTH COUNTY BEEKEEPERS ASSOCIATION INC | $214,419 | D03 | published | | Hanson, MA | 2025 |
| KANSAS VETERINARY MEDICAL ASSN- KVMA | $208,664 | D03 | inferred 0.70 | | Lyndon, KS | 2024 |
| NUTTALL ORNITHOLOGICAL CLUB INC | $208,186 | D03 | published | science: research education | Pembroke, MA | 2024 |
| SOUTHEASTERN REINED COW HORSE ASSOCIATION | $202,146 | D03 | published | | Belton, SC | 2025 |
| FRESHWATER MOLLUSK CONSERVATION SOCIETY | $198,650 | D03 | published | science: research education | Harrisonville, MO | 2025 |
| DELAWARE VETERINARY MEDICAL ASSOCIATION INC | $196,273 | D03 | inferred 0.80 | science: research education | Newark, DE | 2024 |
| AMERICAN ACADEMY OF VETERINARY ACUPUNCTURE INC | $195,298 | D03 | published | | Fayetteville, TN | 2025 |
| NATIONAL CAPITAL AREA BRANCH OF AALAS | $194,959 | D03 | published | science: research education | Frederick, MD | 2025 |
| NATIONAL WALKING HORSE ASSOCIATION | $192,243 | D03 | published | | Bristol, TN | 2025 |
| WILDLIFE SOCIETY INC | $190,760 | D03 | published | science: research education | Nashville, TN | 2024 |
| US LUSITANO ASSOCIATION | $182,954 | D03 | published | | Petersburg, TN | 2024 |
| MARYLAND ORNITHOLOGICAL SOCIETY INC | $179,449 | D03 | published | | Baltimore, MD | 2024 |
| ASSOCIATION OF ZOO AND AQUARIUM DOCENTS AND VOLUNTEERS | $175,569 | D03 | published | | Bradenton, FL | 2024 |
| FEATHER IN HER CAP ASSOCIATION INC | $175,490 | D03 | published | women: issues | Braselton, GA | 2025 |
| THERIOGENOLOGY FOUNDATION | $175,349 | D03 | published | violence: prevention | Providence, RI | 2024 |
| CUMING COUNTRY LIVESTOCK FEEDERS ASSOCIATION INC | $175,120 | D03 | published | | Beemer, NE | 2025 |
| MONTANA VETERINARY MEDICAL ASSOCIATION | $171,735 | D03 | inferred 0.85 | | Helena, MT | 2024 |
| SIMMONS & ASSOCIATES EDUCATIONAL FUND INC | $169,401 | D03 | published | | Colorado Spgs, CO | 2024 |
| BUCKSKIN HORSE ASSOCATION OF MICHIGAN | $162,163 | D03 | published | | Ypsilanti, MI | 2025 |
| AMERICAN ASSOCIATION OF ZOO KEEPERS | $161,633 | D03 | published | | Denver, CO | 2018 |
| AQUARIUM AND ZOO FACILITIES ASSOCIATION INC | $161,033 | D03 | published | | Indianapolis, IN | 2025 |
| WORLD RANCH HORSE ASSOCIATION | $159,661 | D03 | published | | Apache Jct, AZ | 2025 |
| GLASSWALL SYNDICATE ASSOCIATION INC | $152,521 | D03 | published | | Overland Park, KS | 2023 |
| KMSHA OF KENTUCKY INC | $151,701 | D03 | published | | Irvine, KY | 2024 |
| AMERICAN ASSOCIATION OF SMALL RUMINANT PRACTITIONERS | $147,970 | D03 | published | | Baton Rouge, LA | 2024 |