| AMERICAN COLLEGE OF RADIOLOGY | $141,352,754 | G03 | published | science: research education | Reston, VA | 2024 |
| RADIOLOGICAL SOCIETY OF NORTH AMERICA INC | $68,473,609 | G03 | published | science: research education | Oak Brook, IL | 2024 |
| OPTICAL SOCIETY OF AMERICA INC | $61,827,324 | G03 | published | science: research education | Washington, DC | 2024 |
| AMERICAN ACADEMY OF ORTHOPEDIC SURGEONS | $53,567,386 | G03 | published | science: research education | Rosemont, IL | 2024 |
| AMERICAN ACADEMY OF NEUROLOGY INSTITUTE | $46,947,665 | G03 | published | science: research education | Minneapolis, MN | 2025 |
| AMERICAN SOCIETY OF CLINICAL PATHOLOGISTS | $29,319,236 | G03 | inferred 0.60 | science: research education | Chicago, IL | 2024 |
| PUBLIC HEALTH ACCREDITATION BOARD | $24,515,636 | G03 | published | | Alexandria, VA | 2024 |
| PARENTS AS TEACHERS NATIONAL CENTER INC | $20,500,959 | G03 | published | abuse: substance | Saint Louis, MO | 2024 |
| AMERICAN ASSOCIATION OF IMMUNOLOGISTS INC | $20,327,063 | G03 | published | science: research education | Rockville, MD | 2025 |
| The Royal Society of Medicine | $19,166,593 | G03 | inferred 0.60 | science: research education | London | 2018 |
| AACN CERTIFICATION CORP | $18,426,035 | G03 | inferred 0.40 | | Aliso Viejo, CA | 2024 |
| ASSOCIATION OF DIABETES CARE & EDUCATION SPECIALISTS | $16,931,382 | G03 | inferred 0.60 | | Chicago, IL | 2024 |
| AMERICAN ASSOCIATION OF NEUROSURGEONS INC | $13,538,149 | G03 | published | science: research education | Rolling Meadows, IL | 2024 |
| ACOG FOUNDATION | $13,246,929 | G03 | published | domestic violence | Washington, DC | 2024 |
| AMERICAN SOCIETY FOR SURGERY OF THE HAND | $12,705,880 | G03 | published | science: research education | Chicago, IL | 2024 |
| INTERNATIONAL SOCIETY OF NEPHROLOGY | $12,158,463 | G03 | published | science: research education | Cranford, NJ | 2024 |
| HOUSECALL PROVIDERS PC | $11,810,975 | G03 | published | | Portland, OR | 2024 |
| AMERICAN SOCIETY OF NEURORADIOLOGY | $11,063,976 | G03 | inferred 0.60 | | Oak Brook, IL | 2024 |
| NATIONAL TUBEROUS SCLEROSIS ASSOCIATION INC | $9,807,320 | G03 | published | science: research education | Silver Spring, MD | 2025 |
| AMERICAN ROENTGEN RAY SOCIETY | $9,407,427 | G03 | published | science: research education | Leesburg, VA | 2025 |
| AMERICAN SOCIETY OF RETINA SPECIALISTS | $9,303,764 | G03 | inferred 0.80 | science: research education | Chicago, IL | 2024 |
| AMERICAN COLLEGE OF MEDICAL GENETICS AND GENOMICS | $9,094,612 | G03 | inferred 0.85 | science: research education | Bethesda, MD | 2024 |
| AMERICAN BOARD OF PATHOLOGY INC | $8,567,170 | G03 | inferred 0.70 | science: research education | Tampa, FL | 2025 |
| SOCIETY OF SURGICAL ONCOLOGY INC | $8,179,210 | G03 | inferred 0.55 | science: research education | Rosemont, IL | 2025 |
| AMERICAN BOARD OF UROLOGY INC | $6,995,261 | G03 | inferred 0.40 | | Charlottesvle, VA | 2025 |
| FEDERATION OF STATE MASSAGE THERAPY BOARDS | $6,481,874 | G03 | published | | Overland Park, KS | 2024 |
| SOCIETY OF GENERAL INTERNAL MEDICINE | $5,719,971 | G03 | published | | Alexandria, VA | 2024 |
| CALIFORNIA VETERINARY MEDICAL ASSOCIATION | $5,585,288 | G03 | inferred 0.60 | | Sacramento, CA | 2024 |
| AMERICAN ASSOCIATION OF NEUROLOGICAL SURGEONS INC | $5,569,237 | G03 | published | | Rolling Meadows, IL | 2024 |
| SOCIETY OF DIAGNOSTIC MEDICAL SONOGRAPHY | $5,180,091 | G03 | inferred 0.60 | science: research education | Addison, TX | 2025 |
| AOSpine North America Inc | $5,169,897 | G03 | inferred 0.50 | | Paoli, PA | 2013 |
| NAASO THE OBESITY SOCIETY INC | $4,880,101 | G03 | inferred 0.80 | science: research education | Rockville, MD | 2024 |
| ASSOCIATION OF WOMEN IN RHEUMATOLOGY | $4,858,726 | G03 | published | science: research education | Fayetteville, NC | 2025 |
| ASSOCIATION FOR VALUE-BASED CANCER CARE | $4,511,973 | G03 | published | | New York, NY | 2025 |
| DERMATOLOGY EDUCATION FOUNDATION | $4,374,573 | G03 | published | | San Jose, CA | 2024 |
| SOCIETY OF INTERVENTIONAL ONCOLOGY INC | $3,751,897 | G03 | published | science: research education | Washington, DC | 2024 |
| MEDICAL-SURGICAL NURSING CERTIFICATION BOARD INC | $3,216,752 | G03 | published | | Chicago, IL | 2025 |
| NATIONAL BOARD OF ECHOCARDIOGRAPHY INC | $3,105,829 | G03 | inferred 0.70 | | Raleigh, NC | 2025 |
| EASTERN ALLERGY CONFERENCE INC | $3,046,135 | G03 | published | | East Providence, RI | 2025 |
| MULTINATIONAL ASSOCIATION OF SUPPORTIVE CARE IN CANCER | $2,901,001 | G03 | published | | Newton, MA | 2025 |
| THE AMERICAN COLLEGE OF PSYCHIATRISTS INC | $2,736,412 | G03 | inferred 0.70 | science: research education | Chicago, IL | 2024 |
| CALIFORNIA SOCIETY OF ANESTHESIOLOGISTS | $2,720,560 | G03 | inferred 0.80 | | Sacramento, CA | 2024 |
| INTERNATIONAL GYNECOLOGIC CANCER SOCIETY INC | $2,648,564 | G03 | published | women: issues | Louisville, KY | 2025 |
| COALITION FOR HEALTH AI INC | $2,552,500 | G03 | published | | Framington, MA | 2024 |
| SEXUAL MEDICINE SOCIETY OF NORTH AMERICA | $2,528,744 | G03 | published | men: issues | Burnsville, MN | 2025 |
| PEDIATRIC DERMATOLOGY RESEARCH ALLIANCE INC | $2,470,280 | G03 | published | survivor: cancer | Portland, OR | 2025 |
| COALITION OF STATE RHEUMATOLOGY ORGANIZATIONS INC | $2,376,696 | G03 | published | | Milwaukee, WI | 2024 |
| NATIONAL ASSOCIATION OF COUNCILS ON DEVELOPMENTAL DISABILITIES | $2,074,472 | G03 | published | | Washington, DC | 2024 |
| AMERICAN BOARD OF MEDICAL GENETICS AND GENOMICS INC | $2,056,973 | G03 | inferred 0.60 | | Rockville, MD | 2024 |
| AMERICAN SOCIETY OF DERMATOPATHOLOGY | $2,041,293 | G03 | inferred 0.80 | | Bannockburn, IL | 2024 |
| AMERICAN ACADEMY OF COSMETIC SURGERY INC | $2,037,635 | G03 | inferred 0.55 | | Elgin, IL | 2025 |
| OSTEOPATHIC FOUNDERS FOUNDATION | $1,956,766 | G03 | published | girls boys: girl scouts | Tulsa, OK | 2024 |
| ASRT FOUNDATION | $1,905,907 | G03 | published | science: research education | Albuquerque, NM | 2024 |
| SOCIETY OF ABDOMINAL RADIOLOGY | $1,855,994 | G03 | published | | East Dundee, IL | 2024 |
| SOCIETY OF FORENSIC TOXICOLOGIST INC | $1,815,135 | G03 | published | | Mesa, AZ | 2024 |
| INTERNATIONAL NEUROPSYCHOLOGICAL | $1,782,238 | G03 | inferred 0.60 | science: research education | Salt Lake City, UT | 2024 |
| MASSACHUSETTS HEALTH OFFICERS ASSOCIATION INCORPORATED | $1,695,830 | G03 | published | | Walpole, MA | 2024 |
| AMERICAN COLLEGE OF DIABETOLOGY INC | $1,642,507 | G03 | published | | Fayetteville, NC | 2025 |
| CANCERCONNECTS INC | $1,605,711 | G03 | published | | East Syracuse, NY | 2024 |
| INTERNATIONAL CHIROPRACTORS ASSOCIATION INC | $1,571,860 | G03 | inferred 0.50 | science: research education | Falls Church, VA | 2024 |
| NATIONAL ACADEMY OF NEUROPSYCHOLOGY INC | $1,552,230 | G03 | inferred 0.55 | science: research education | Littleton, CO | 2025 |
| LIFESTYLE MEDICINE FOUNDATION | $1,525,859 | G03 | published | science: research education | Salem, OR | 2025 |
| Council for Certification in | $1,492,784 | G03 | inferred 0.50 | | Gaithersburg, MD | 2014 |
| GEORGIA SOCIETY OF DERMATOLOGY AND DERMATOLOGIC SURGERY INC | $1,490,162 | G03 | inferred 0.80 | | Norcross, GA | 2025 |
| UNDERSEA & HYPERBARIC MEDICAL SOCIETY INC | $1,461,462 | G03 | published | science: research education | North Palm Beach, FL | 2025 |
| SOCIETY OF UROLOGIC NURSES AND ASSOCIATES SUNA | $1,362,416 | G03 | published | | Pitman, NJ | 2024 |
| SPECIAL OPERATIONS MEDICAL ASSOCIATION INC | $1,342,389 | G03 | published | science: research education | Washington, DC | 2024 |
| AMERICAN BOARD OF ENDODONTICS | $1,312,526 | G03 | inferred 0.60 | | Buffalo Grove, IL | 2024 |
| AMERICAN OSTEOPATHIC COLLEGE OF RADIOLOGY | $1,281,087 | G03 | inferred 0.60 | | Milan, MO | 2024 |
| CALIFORNIA PSYCHOLOGICAL ASSOCIATION | $1,275,659 | G03 | inferred 0.40 | abuse: child | Sacramento, CA | 2024 |
| GEORGIA SOCIETY OF CLINICAL ONCOLOGY INC | $1,254,790 | G03 | inferred 0.70 | | Atlanta, GA | 2025 |
| SOCIETY FOR MINIMALLY INVASIVE SPINE SURGERY | $1,251,660 | G03 | published | | Wheaton, IL | 2025 |
| SOCIETY FOR BIOMATERIALS | $1,224,762 | G03 | published | | Mount Laurel, NJ | 2025 |
| FLORIDA SOCIETY OF RHEUMATOLOGY INC | $1,210,054 | G03 | inferred 0.70 | | Jacksonville, FL | 2024 |
| ASSOC FOR EDUCATION & REHBLTATN OF THE BLIND & VISUALLY IMPAIRED | $1,197,475 | G03 | published | | Lubbock, TX | 2024 |
| CHILDRENS CANCER NETWORK | $1,193,534 | G03 | published | survivor: cancer | Chandler, AZ | 2025 |
| DIVERSIFIED DERMATOLOGY EDUCATION FOUNDATION | $1,189,915 | G03 | published | | Winter Garden, FL | 2025 |
| OUTPATIENT ENDOVASCULAR AND INTERVENTIONAL SOCIETY | $1,173,760 | G03 | published | science: research education | Wonder Lake, IL | 2024 |
| NORTH AMERICAN BOARD OF NATUROPATHIC EXAMINERS | $1,161,488 | G03 | published | | Portland, OR | 2024 |
| EASTERN ORTHOPAEDIC ASSOCIATION INC | $1,088,549 | G03 | inferred 0.70 | science: research education | Towson, MD | 2024 |
| IOWA DENTAL ASSOCIATION GENL FUND | $1,010,881 | G03 | inferred 0.60 | abuse: child | Des Moines, IA | 2024 |
| COLORADO OPTOMETRIC ASSOCIATION INC | $997,458 | G03 | inferred 0.60 | | Denver, CO | 2025 |
| INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS | $987,126 | G03 | published | science: research education | Valencia, CA | 2025 |
| WORLD ALLERGY ORGANIZATION INC | $892,179 | G03 | inferred 0.70 | science: research education | Milwaukee, WI | 2024 |
| AMERICAN ACADEMY OF FIXED PROSTHODONTICS | $882,957 | G03 | inferred 0.70 | | Asheville, NC | 2024 |
| TICK-BORNE DISEASE ALLIANCE | $881,367 | G03 | inferred 0.50 | | New York, NY | 2013 |
| AMERICAN CONTACT DERMATITIS SOCIETY | $801,324 | G03 | inferred 0.70 | science: research education | Milwaukee, WI | 2024 |
| AMERICAN BOARD OF MULTIPLE SPECIALITIES IN PODIATRY | $791,799 | G03 | inferred 0.70 | | Trenton, NJ | 2024 |
| CHICAGO MEDICAL SOCIETY FOUNDATION | $788,667 | G03 | published | science: research education | Chicago, IL | 2024 |
| MAD-ID INCORPORATED | $782,056 | G03 | published | | Troy, MI | 2024 |
| ILLINOIS SOCIETY OF DERMATOLOGYPHYSICIAN ASSISTANTS | $778,538 | G03 | published | | Chicago, IL | 2024 |
| AMERICAN PROFESSIONAL SOCIETY FORADHD AND RELAT EE DISORDERS INC | $742,438 | G03 | published | science: research education | Brentwood, TN | 2024 |
| LAC USC ATTENDING STAFF ASSOCIATION | $742,350 | G03 | published | science: research education | Los Angeles, CA | 2025 |
| ASSOCIATION FOR COMPREHENSIVE ENERGY PSYCHOLOGY | $739,115 | G03 | published | | Bryn Mawr, PA | 2025 |
| CALIFORNIA DIALYSIS COUNCIL INC | $729,180 | G03 | inferred 0.50 | | Manhattan Bch, CA | 2024 |
| SOUTHERN CALIFORNIA VETERINARY MEDICAL ASSOCIATION | $725,345 | G03 | inferred 0.60 | | Cypress, CA | 2025 |
| NON-EMERGENCY MEDICAL TRANSPORTATIO N ACCREDITATION COMMISSION | $705,091 | G03 | published | | Tempe, AZ | 2024 |
| AMERICAN ASSOCIATION OF SWINE VETERINARIANS FOUNDATION | $701,969 | G03 | inferred 0.40 | | Perry, IA | 2024 |
| NATIONAL EDUCATION ALLIANCE FOR BORDERLINE PERSONALITY DISORDER | $699,813 | G03 | published | | Twp Washinton, NJ | 2024 |
| SPINE TECHNOLOGY AND EDUCATIONAL GROUP ORGANIZATION | $692,675 | G03 | published | | Wheaton, IL | 2025 |