| Stepney Parent-Teachers Organization IncMonroe | Form 990-EZ | $48,615FY2025 |
| Essex Meadows Foundation IncEssex | Form 990 | $48,529FY2025 |
| Buzz RoboticsEnfield | Form 990-N | No figure |
| Rotary Club of Mystic Charitable Fund IncMystic | Form 990-EZ | $47,696FY2025 |
| Christopher D Corbett Memorial Fund IncWaterbury | Form 990-EZ | $47,475FY2024 |
| Hebron Avenue School Parent Teacher OrganizationGlastonbury | Form 990-EZ | $46,754FY2025 |
| Urban Fresh Gardens IncWaterbury | Form 990-EZ | $46,539FY2024 |
| Westover PTOStamford | Form 990-EZ | $46,332FY2025 |
| Aauw Lower Connecticut Valley Education and Scholarship ProgramOld Saybrook | Form 990-EZ | $46,034FY2026 |
| Suffield Rotary FoundationSuffield | Form 990-EZ | $45,881FY2025 |
| Aluminum Falcon RoboticsGroton | Form 990-N | No figure |
| Tyler Cop Memorial Fund IncEast Berlin | Form 990-EZ | $45,818FY2024 |
| Lewis S Mills PTOBurlington | Form 990-N | No figure |
| Parent Booster USA IncBurlington | Form 990-EZ | $45,492FY2025 |
| Friends of the Milford Public LibraryMilford | Form 990-EZ | $45,289FY2025 |
| Westport Pba Scholarship Foundation IncWestport | Form 990-EZ | $44,893FY2025 |
| Branford Rotary Foundation IncBranford | Form 990-EZ | $44,656FY2025 |
| Burr District Elementary School Parent-Teacher OrganizationHigganum | Form 990-EZ | $44,483FY2025 |
| Bridgeport Firebirds IncBridgeport | Form 990-N | No figure |
| Nayaug Elementary School Parent Teacher OrganizationSouth Glastonbury | Form 990-EZ | $43,086FY2025 |
| Help Our People IncOrange | Form 990-N | No figure |
| Parent Booster USA IncOxford | Form 990-EZ | $42,651FY2025 |
| Greater Hartford Trades Scholarship Foundation CorporationSouth Windsor | Form 990-N | No figure |
| Society of Nepalese in AmericaBranford | Form 990-N | No figure |
| Ace Mentor Program of America IncFairfield | Form 990-N | No figure |
| Glastonbury Friends for Music IncGlastonbury | Form 990-EZ | $41,239FY2025 |
| Simplex SciencesNew Haven | Form 990-EZ | $41,048FY2025 |
| Old Timers Athletic Association of Greater Danbury IncDanbury | Form 990-EZ | $40,988FY2025 |
| Pine Grove Elementary School Parent-Teacher Organization IncAvon | Form 990-EZ | $39,556FY2025 |
| Daniel J Griffin MemorialSouth Windsor | Form 990 | $39,529FY2026 |
| William M Strong Elementary School PTO IncPlantsville | Form 990-EZ | $39,276FY2025 |
| Saint John School Charitable Foundation TRStamford | Form 990 | $39,127FY2025 |
| Ufcw Union Local 919 Community Charity IncFarmington | Form 990-EZ | $39,038FY2025 |
| EMS Institute IncSharon | Form 990-N | No figure |
| The Bethel Education Foundation IncBethel | Form 990-EZ | $38,827FY2025 |
| Southington Lions Foundation for Giving IncSouthington | Form 990-EZ | $38,151FY2026 |
| Yale Sappern Memorial Scholarship Fund IncNew Haven | Form 990-N | No figure |
| Flanders School PTOSouthington | Form 990-EZ | $37,522FY2025 |
| Rotary Club of East Hartford Charitable FundGlastonbury | Form 990-EZ | $37,441FY2025 |
| The Parent Teacher Council of StamfordStamford | Form 990-N | No figure |
| Highcrest Elementary School Parent Teacher Organization IncWethersfield | Form 990-EZ | $36,556FY2025 |
| Highland Yalesville Elementary School Parent Teacher OrganizationYalesville | Form 990-EZ | $36,157FY2025 |
| Douglas S Druan Memorial Foundation IncWolcott | Form 990-N | No figure |
| Rotary Club of Watertown Connecticut Foundation IncWatertown | Form 990-EZ | $35,807FY2025 |
| CT Education Foundation IncDanbury | Form 990-EZ | $35,578FY2025 |
| Joseph Manzi Foundation IncKensington | Form 990-N | No figure |
| The Long Ridge Library IncDanbury | Form 990-N | No figure |
| Connecticut Nurses Foundation IncMiddletown | Form 990-N | No figure |
| Windsor Police Cadets IncWindsor | Form 990-N | No figure |
| The Parent Teacher Council of StamfordStamford | Form 990-EZ | $33,747FY2025 |