| National Bureau of Economic Research IncCambridge | Form 990 | $46,995,418FY2025 |
| Human Services Research Institute IncCambridge | Form 990 | $18,023,780FY2025 |
| American Institute for Economic Research IncGreat Barrington | Form 990 | $13,156,984FY2025 |
| American Academy of Arts and SciencesCambridge | Form 990 | $10,404,572FY2025 |
| Senior Connection IncWorcester | Form 990 | $5,646,746FY2025 |
| Political Research AssociatesSomerville | Form 990 | $4,692,441FY2024 |
| Black Economic Council of Massachusetts IncRoxbury Crossing | Form 990 | $3,951,279FY2025 |
| Scholars Strategy NetworkBoston | Form 990 | $3,197,242FY2025 |
| Center for Public Interest Research IncBoston | Form 990 | $3,133,605FY2024 |
| Brazelton Touchpoints Project IncBoston | Form 990 | $2,515,980FY2024 |
| Schumacher Center for a New EconomicsGreat Barrington | Form 990 | $2,304,833FY2024 |
| Higher Ambition Leadership Alliance IncBurlington | Form 990 | $1,826,986FY2025 |
| Applied Economics ClinicBoston | Form 990 | $1,826,294FY2025 |
| United for a Fair Economy IncBoston | Form 990 | $1,238,528FY2025 |
| ARC4JUSTICE IncLexington | Form 990 | $862,023FY2024 |
| Mentor Group Institute for Intercultural Education IncBraintree | Form 990 | $665,391FY2024 |
| Conjecture Institute IncFlorence | Form 990 | $551,402FY2025 |
| Human Engineering Laboratory IncorporatedBoston | Form 990 | $459,399FY2024 |
| Massachusetts Women of Color Network IncDorchester Center | Form 990 | $374,936FY2025 |
| Bounce Beyond IncBoston | Form 990 | $317,322FY2025 |
| CG Jung Institute of New England IncNewton Highlands | Form 990 | $283,439FY2026 |
| Economic Affairs Bureau IncBoston | Form 990 | $220,045FY2025 |
| McQuillan FoundationBoston | Form 990 | $201,000FY2025 |
| Brazilian Community Heritage Foundation CorpSomerville | Form 990-EZ | $184,388FY2025 |
| Society for Clinical & Experimental HypnosisChelsea | Form 990-EZ | $141,512FY2025 |
| William Wilberforce International School of Poverty Alleviation andCambridge | Form 990-EZ | $112,201FY2025 |
| Society for the Study of Emerging Adulthood IncWorcester | Form 990-EZ | $97,263FY2025 |
| Association for Election Science Reform and AdministrationCambridge | Form 990-EZ | $71,310FY2025 |
| Association for Economic & Social Analysis AesaBrighton | Form 990-EZ | $65,526FY2025 |
| Association for the Study of Persianate Societies IncBoston | Form 990-N | No figure |
| Ssso of Northeast IncBedford | Form 990-N | No figure |
| Cyrus Institute of KnowledgeActon | Form 990-N | No figure |
| Iranian Womens Studies Foundation IncCambridge | Form 990-N | No figure |
| Balkan Studies Institute IncBoston | Form 990-N | No figure |
| Society for Quantitative Analyses of Behavior IncSouthborough | Form 990-N | No figure |
| Assyrian American Association of Massachusetts IncNorth Grafton | Form 990-N | No figure |
| Wise Counsel Research IncMilton | Form 990-N | No figure |
| Leominster Group Decision and Operations Research CenterLeominster | Form 990-N | No figure |
| The Types Project IncBoston | Form 990-N | No figure |
| Friends of the Laboratory for Developmental Studies IncCambridge | Form 990-N | No figure |
| Behaviorpedia IncMilford | Form 990-N | No figure |
| Critical ConnectionsLongmeadow | Form 990-N | No figure |
| A3 Research Institute IncWest Brookfield | Form 990-N | No figure |
| Good Insight IncBoston | Form 990-N | No figure |
| Middle East Economic AssociationWeston | Form 990-N | No figure |
| Association of Reporters of Judicial DecisionsDanvers | Form 990-N | No figure |
| Kypros Net IncWinchester | Form 990-N | No figure |
| National Council for Geocosmic Research IncNewton | Form 990-N | No figure |
| Institute for Human Settlements IncNewton | Form 990-N | No figure |
| Committee to Support the ItnjDanvers | Form 990-N | No figure |