| Joint Commission On Accreditation Of Healthcare Organizations | Oakbrook Terrace | IL | $106M |
| Sedra LLC | Harrisonburg | VA | $56.4M |
| Steel Founders Society Of America | Crystal Lake | IL | $38.4M |
| National Association For Public Health Statistics And Information Systems, Inc. | Silver Spring | MD | $30.8M |
| International Health Terminology Standards Development Organisation | London | | $29.5M |
| American Council On Education | Washington | DC | $27.6M |
| Institute Of Electrical & Electronics Engineers Inc. | Piscataway | NJ | $21.6M |
| American Association For The Advancement Of Science | Washington | DC | $16.6M |
| North American Association Of Central Cancer Registries Inc. | Springfield | IL | $16.1M |
| Sae International | Warrendale | PA | $13.3M |
| American College Of Medical Toxicology, Inc. | Paradise Valley | AZ | $11.6M |
| America's Poison Centers | Arlington | VA | $10.9M |
| Duff & Phelps Investment Management Co. | Chicago | IL | $10.3M |
| American College Of Surgeons | Chicago | IL | $10.1M |
| Institute Of Transportation Engineers, Inc. | Washington | DC | $9.83M |
| American Association Of Blood Banks, Inc. | Bethesda | MD | $8.98M |
| International City/county Management Association (the) | Washington | DC | $8.94M |
| Northstar Anesthesia Of Michigan, PLLC | Irving | TX | $8.62M |
| H&S Water And Waste Water Design And Consultancy Services | Georgetown | | $7.79M |
| Accreditation Association For Ambulatory Health Care, Inc. | Deerfield | IL | $6.82M |
| American Medical Association | Chicago | IL | $6.6M |
| American Psychiatric Association | Washington | DC | $6.58M |
| Mongolian Properties LLC | Ulaanbaatar | ULAANBAATAR | $6.52M |
| Proximus Sa | Bruxelles | | $6.52M |
| American Chemical Society | Washington | DC | $5.86M |
| National Association For Healthcare Quality | Chicago | IL | $5.75M |
| Academy Health | Washington | DC | $5.74M |
| Ampp Global Center Inc. | Houston | TX | $5.56M |
| American Society Of Civil Engineers | Reston | VA | $5.17M |
| Rtca Inc. | Washington | DC | $4.92M |
| American Board Of Family Medicine Inc. | Lexington | KY | $4.72M |
| National Contract Management Association | Reston | VA | $4.48M |
| Coastal States Stewardship Foundation | Washington | DC | $4.39M |
| The American Society Of Human Genetics, Incorporated | Rockville | MD | $4.33M |
| Association Of Public Health Laboratories, Inc. (the) | Bethesda | MD | $4.11M |
| American Academy Of Family Physicians | Leawood | KS | $3.83M |
| American Psychological Association | Washington | DC | $3.37M |
| Communications Technology Broadcasting (pty) Ltd. | Benoni | | $3.35M |
| Association Of Public-safety-communications Officials-international, Inc. | Daytona Beach | FL | $3.32M |
| Djibouti Telecom Sa | Pompidou | | $3.23M |
| American Institute Of Aeronautics And Astronautics, Inc. | Reston | VA | $3.07M |
| Edlore Inc. | Laguna Hills | CA | $3.05M |
| Information Systems Audit And Control Association, Inc. | Schaumburg | IL | $2.98M |
| American College Of Emergency Physicians | Irving | TX | $2.59M |
| Cbre Egypt LLC | New Cairo | CAIRO | $2.58M |
| Military Operations Research Society, Inc. | Arlington | VA | $2.47M |
| The Association Of State And Territorial Health Officials | Arlington | VA | $2.41M |
| Kirk Associates LLC | Goodyear | AZ | $2.32M |
| Association Of Certified Fraud Examiners, Inc. | Austin | TX | $2.27M |
| Jp Innovations, L.L.C. | Monroe | WA | $2.1M |
| International Information System Security Certification Consortium, Inc. | Alexandria | VA | $2.09M |
| Center For Energy Workforce Development | Washington | DC | $1.98M |
| Aerodynamic Technologies, Inc. | Tenino | WA | $1.98M |
| Association For The Advancement Of Medical Instrumentation, Inc. | Arlington | VA | $1.94M |
| Eastern Carolina Homelessness Org, Inc. | Myrtle Beach | SC | $1.87M |
| Association Of Military Surgeons Of The United States, Inc. | Frederick | MD | $1.85M |
| Wahat Al Mansouria For Contracting & Maintenance Co. | Riyadh | | $1.84M |
| American Medical Informatics Association, Inc. | Fairway | KS | $1.63M |
| American Society For Microbiology | Washington | DC | $1.5M |
| Society Of Photo-optical Instrumentation Engineers | Bellingham | WA | $1.49M |
| Healthcare Information And Management Systems Society | Chicago | IL | $1.45M |
| Air Force Sergeants Association | Suitland | MD | $1.45M |
| Segurcaixa Adeslas, S.a. De Seguros Y Reaseguros. | Madrid | | $1.45M |
| Association For Computing Machinery, Inc. | New York | NY | $1.41M |
| Mgma-acmpe | Englewood | CO | $1.4M |
| Council Of Chief State School Officers, Incorporated | Washington | DC | $1.36M |
| National Association Of School Nurses, Incorporated | Silver Spring | MD | $1.36M |
| American Medical Experts, LLC | Aldie | VA | $1.36M |
| National Association Of Chronic Disease Directors, Inc. | Decatur | GA | $1.34M |
| Nishimura & Asahi (gaikokuho Kyodo Jigyo) | Chiyoda-ku | | $1.33M |
| Toro Science Corp. | Massapequa | NY | $1.32M |
| Neuromersive, Inc. | Fort Worth | TX | $1.32M |
| Drug Information Association, Inc. | Washington | DC | $1.31M |
| Nicholson Professional Consulting, Inc. | Liberty Hill | TX | $1.28M |
| American Academy Of Pediatrics | Itasca | IL | $1.27M |
| Wd Forensic Inc. | Snohomish | WA | $1.25M |
| Appcensus, Inc. | Albany | CA | $1.23M |
| International Association Of Chiefs Of Police | Alexandria | VA | $1.2M |
| Oasis Open | Woburn | MA | $1.2M |
| The Beryl Institute, LLC | Nashville | TN | $1.2M |
| Society For Human Resource Management | Alexandria | VA | $1.13M |
| International Association Of Fire Chiefs, Inc. | Mc Lean | VA | $1.08M |
| Seguros Atlas | Mexico City | | $1.06M |
| American Nurses Credentialing Center, Inc. A/k/a American Nurses Credentialing Center | Silver Spring | MD | $1.05M |
| The American Society Of Mechanical Engineers | New York | NY | $1.04M |
| Alliance For Telecommunications Industry Solutions Inc. | Washington | DC | $1.03M |
| Green Street Advisors, LLC | Newport Beach | CA | $1.02M |
| Actuaciones De Demoliciones Y Construccion Sl. | Madrid | | $1.01M |
| American Industrial Hygiene Association | Falls Church | VA | $1.01M |
| Louisiana Association Of Broadcasters | Baton Rouge | LA | $996K |
| Bruggeman-maes | Antwerpen | | $985K |
| Society Of General Internal Medicine | Alexandria | VA | $976K |
| American College Of Preventive Medicine, Inc. (the) | Washington | DC | $968K |
| Acog Foundation | Washington | DC | $934K |
| National Society Of Black Engineers | Alexandria | VA | $931K |
| Sgs-tuev Saar GMBH | Kaiserslautern | | $896K |
| United States Society On Dams | Knightdale | NC | $890K |
| Pqa Inc. | Alexandria | VA | $857K |
| American Society For Clinical Pathology | Chicago | IL | $835K |
| Theofanous & Co. Inc. | Santa Barbara | CA | $827K |
