| Spiritual Center of Southport IncSouthport | Form 990-N | No figure |
| Judson School Parent Teacher Organization IncWatertown | Form 990-EZ | $32,096FY2025 |
| Friends of Canton Football IncCanton | Form 990-EZ | $31,949FY2025 |
| Hopewell School Parent Teacher OrganizationSouth Glastonbury | Form 990-EZ | $31,528FY2025 |
| Western New England Psychoanalytic Society IncNew Haven | Form 990-N | No figure |
| Wilton Student Financial Aid Committee IncWilton | Form 990-N | No figure |
| Laddie Lawrence Scholarship Fund IncWestport | Form 990-N | No figure |
| Brooklyn PTOBrooklyn | Form 990-EZ | $29,824FY2025 |
| North Stonington Education Foundation IncNorth Stonington | Form 990-EZ | $29,355FY2025 |
| Sistergood IncStamford | Form 990-N | No figure |
| New England Faculty Development ConsortiumEnfield | Form 990-N | No figure |
| Kiwanis Club of Weston Foundation IncWeston | Form 990-N | No figure |
| Windsor Diamond Club IncWindsor | Form 990-EZ | $28,579FY2025 |
| Rotary Club of Somers Charitable Fund IncSomers | Form 990-N | No figure |
| International Hildreth Meiere Association IncStamford | Form 990-N | No figure |
| Consortium for Language Teaching and Learning IncNew Haven | Form 990-N | No figure |
| Highland School PTO IncCheshire | Form 990-EZ | $27,256FY2025 |
| Berlin Free Library AssociationBerlin | Form 990-N | No figure |
| The Michael Bolton Charities IncWallingford | Form 990 | $26,689FY2024 |
| Eduinnovate Foundation IncEllington | Form 990-N | No figure |
| Stonington Education Fund IncPawcatuck | Form 990-EZ | $26,206FY2025 |
| Nursing Education Alumni Association IncOld Greenwich | Form 990-EZ | $25,796FY2025 |
| Business-Education Foundation IncBristol | Form 990-N | No figure |
| Mary E Griswold School Parents ClubKensington | Form 990-EZ | $25,292FY2025 |
| Putnam Rotary Foundation IncPutnam | Form 990 | $25,259FY2023 |
| Connecticut Head Start Start AssociationNew Haven | Form 990-N | No figure |
| Webb Elementary School Parent Teacher OrganizationWethersfield | Form 990-EZ | $25,009FY2025 |
| Derby-Shelton Rotary Club Foundatio IncShelton | Form 990-EZ | $24,802FY2025 |
| Visual Art Library IncNew London | Form 990-N | No figure |
| Wallingford Education Foundation IncWallingford | Form 990-N | No figure |
| Jonathan R Boughton Scholarship CorporationNorth Branford | Form 990-N | No figure |
| Hamden Education Foundation IncHamden | Form 990-N | No figure |
| Mickey Lione Jr Fund IncStamford | Form 990-N | No figure |
| Tiger Hollow IncRidgefield | Form 990-N | No figure |
| JWV Community Scholarships IncStamford | Form 990-EZ | $22,199FY2025 |
| James V Spignesi Jr Memorial Fund IncWest Hartford | Form 990-N | No figure |
| Yale Whiffenpoof Alumni IncNew Haven | Form 990-N | No figure |
| Elizabeth Shelton School PTO IncShelton | Form 990-EZ | $21,026FY2025 |
| Bunnell Bulldog Club IncorporatedStratford | Form 990-N | No figure |
| MVP Sos Foundation IncNew Milford | Form 990-N | No figure |
| JFK Eagles Middle School PTOPlantsville | Form 990-N | No figure |
| The Michael P Doyle Memorial Foundation IncDurham | Form 990-EZ | $18,546FY2025 |
| Jerome Harrison School PTONorth Branford | Form 990-N | No figure |
| Italian Heritage Committee of NorwichNorwich | Form 990-N | No figure |
| Tves PTO IncNorthford | Form 990-N | No figure |
| Reunification FoundationHamden | Form 990-EZ | $17,174FY2025 |
| Prospect Elementary School Parent-Teacher OrganizationProspect | Form 990-EZ | $17,067FY2025 |
| Connecticut Odyssey of the Mind IncWeston | Form 990-N | No figure |
| Cornerstone Project IncMystic | Form 990-N | No figure |
| Italian American Legislative Caucus Educational Fund IncWest Hartford | Form 990-N | No figure |