| Medical Technology Enterprise ConsortiumNorth Bethesda | Form 990 | $234,472,156FY2024 |
| American Physical SocietyCollege Park | Form 990 | $106,332,062FY2024 |
| American Institute of Physics IncorporatedCollege Park | Form 990 | $92,366,805FY2024 |
| American Association for Laboratory AccreditationFrederick | Form 990 | $28,768,808FY2025 |
| Energetics Technology Center IncIndian Head | Form 990 | $28,407,479FY2025 |
| Pacific Institute for Research and EvaluationBeltsville | Form 990 | $16,698,460FY2025 |
| American Society for Biochemistry and Molecular Biology IncRockville | Form 990 | $13,920,670FY2024 |
| Patuxent Partnership IncLexington Park | Form 990 | $9,556,202FY2025 |
| Entomological Society of AmericaAnnapolis | Form 990 | $6,826,663FY2024 |
| American Association of Physics Teachers IncCollege Park | Form 990 | $6,193,699FY2024 |
| Military Health Research Foundation IncLaurel | Form 990 | $5,110,658FY2024 |
| Molluscan Science Foundation IncOwings Mills | Form 990 | $4,141,578FY2025 |
| American Association for AnatomyRockville | Form 990 | $3,730,489FY2024 |
| Low Impact Development Center IncBeltsville | Form 990 | $3,462,048FY2025 |
| Society for Developmental Biology IncRockville | Form 990 | $1,632,587FY2024 |
| Journey to Lead IncChester | Form 990 | $1,522,355FY2025 |
| National Information Standards Organization Z39Baltimore | Form 990 | $1,462,968FY2023 |
| Society of Rheology IncorporatedCollege Park | Form 990 | $776,163FY2024 |
| Beyond NuclearTakoma Park | Form 990 | $683,705FY2025 |
| Standards Coordinating Body for Gene Cell and Regenerative MedicinGaithersburg | Form 990 | $552,507FY2024 |
| Histochemical Society IncRockville | Form 990 | $521,375FY2024 |
| International Society for Bayesian AnalysisEllicott City | Form 990 | $456,651FY2025 |
| Novagen Research FundNorth Bethesda | Form 990 | $425,000FY2025 |
| Maryland Space Business Roundtable IncNew Windsor | Form 990 | $400,456FY2024 |
| Cuspea Academy CorpFrederick | Form 990 | $322,628FY2023 |
| Mid-Atlantic Gigabit Innovation Collaboratory IncWestminster | Form 990 | $309,847FY2025 |
| American Society for Matrix BiologyRockville | Form 990 | $297,649FY2025 |
| Consult LemonadeColumbia | Form 990 | $280,002FY2024 |
| Climate Law and Policy Initiative IncChevy Chase | Form 990 | $266,745FY2024 |
| Edgemoor Research InstituteBethesda | Form 990-EZ | $186,133FY2025 |
| Integrity Research InstituteBeltsville | Form 990 | $159,240FY2024 |
| CSRM Foundation IncBaltimore | Form 990-EZ | $157,136FY2025 |
| Pcca Education and Research Foundation IncChurchton | Form 990-EZ | $118,936FY2025 |
| Prabalta IncRockville | Form 990-EZ | $106,483FY2024 |
| Cyberauto ChallengePasadena | Form 990-EZ | $95,011FY2025 |
| Bridges Mathematical Connections Inart Music and Science IncEllicott City | Form 990-EZ | $88,910FY2025 |
| International Commission on Radi- Ation Units and Measurements IncBethesda | Form 990 | $84,805FY2024 |
| Paxspace IncCalifornia | Form 990-EZ | $81,079FY2025 |
| International Society for Nucleotides & Nucleic AcidsBaltimore | Form 990 | $77,536FY2025 |
| American Chemical SocietyNew Windsor | Form 990-EZ | $76,508FY2025 |
| American Friends of the Us-Israel Binational Science FoundationNorth Bethesda | Form 990-EZ | $75,000FY2025 |
| MitoydnaThurmont | Form 990-EZ | $61,190FY2026 |
| Otter Point Creek Alliance IncAbingdon | Form 990-EZ | $57,069FY2025 |
| American Society for Cellular and Computational Toxicology IncGaithersburg | Form 990-N | No figure |
| Bitcamp IncCollege Park | Form 990-N | No figure |
| Wearable Tech Ventures IncBaltimore | Form 990-N | No figure |
| Oxford Research Institute IncRockville | Form 990-N | No figure |
| Montgomery Area Science Fair AssociationGermantown | Form 990-N | No figure |
| The Center for Advancing Innovation IncBethesda | Form 990-N | No figure |
| People Staff Institute AssociationGermantown | Form 990-N | No figure |