| The Greenwich Rotary FoundationCos Cob | Form 990-N | No figure |
| Killingworth Land Conservation Trust IncKillingworth | Form 990-N | No figure |
| Killingworth Volunteer Fire Co IncKillingworth | Form 990-N | No figure |
| Trumpeteers Christian Ministries IncPomfret Center | Form 990-N | No figure |
| Israel Putnam House Association of Connecticut IncGreenwich | Form 990-N | No figure |
| Somers Cooperative PreschoolSomers | Form 990-N | No figure |
| Wallingford Girls Softball League IncWallingford | Form 990-EZ | $37,654FY2024 |
| Special Wishes IncOakville | Form 990-N | No figure |
| Rotary Club of Danbury Charitable TRLitchfield | Form 990-EZ | $37,082FY2026 |
| PTSA Connecticut IncFairfield | Form 990-EZ | $36,912FY2025 |
| Trumbull Historical Society IncTrumbull | Form 990-N | No figure |
| Parent Booster USA IncNorwalk | Form 990-N | No figure |
| Parent Teacher Association of Connecticut IncNorwalk | Form 990-EZ | $36,241FY2025 |
| Groton Scholarship Fund IncGroton | Form 990-N | No figure |
| Marine Cadets of America IncNew Haven | Form 990-N | No figure |
| Candlelight Concert Series CorporationWilton | Form 990-N | No figure |
| Monroe Little Lions Cheerleading IncMonroe | Form 990-N | No figure |
| Val Trebbia 2 Val Nure Scholarship FundMilford | Form 990 | $33,723FY2025 |
| Metropolitan New York Association for Applied PsychologyGreenwich | Form 990-N | No figure |
| PTSA Connecticut CongressSandy Hook | Form 990-EZ | $32,706FY2025 |
| Tolland Historical Society IncorporatedTolland | Form 990-N | No figure |
| Milford Youth Lacrosse IncMilford | Form 990-N | No figure |
| Little League Baseball IncMeriden | Form 990-N | No figure |
| Granby High School Footballsupporters IncWest Granby | Form 990-EZ | $32,446FY2025 |
| Connecticut State Police Academy Educational Foundation IncMeriden | Form 990-EZ | $32,444FY2025 |
| The Friends of the Hamden LibraryHamden | Form 990-N | No figure |
| Eastern Connecticut Forest Landowners Association / Wolf DenBrooklyn | Form 990-N | No figure |
| Jewish Historical Society of Greater Stamford IncStamford | Form 990-N | No figure |
| Newington Community Television IncNewington | Form 990-N | No figure |
| Particular Council Society of St Vincent de PaulNiantic | Form 990-N | No figure |
| Southbury Historical Society IncSouthbury | Form 990-N | No figure |
| Pig Roast IncMiddletown | Form 990-N | No figure |
| PTSA Connecticut IncRidgefield | Form 990-N | No figure |
| PTSA Connecticut IncOrange | Form 990-EZ | $28,593FY2025 |
| Friends of Heublein TowerAvon | Form 990 | $28,540FY2024 |
| Little League Baseball IncClinton | Form 990-N | No figure |
| PTSA Connecticut IncFairfield | Form 990-N | No figure |
| Western Connecticut Chapter National Railway Historical SocietNorwalk | Form 990-N | No figure |
| Watertown Land Trust IncWatertown | Form 990-N | No figure |
| Muslims for HumanityBrookfield | Form 990-N | No figure |
| PTSA Connecticut CongressNewtown | Form 990-N | No figure |
| The Chi Rho Fund IncStamford | Form 990-N | No figure |
| PTSA Connecticut IncTrumbull | Form 990-EZ | $23,144FY2025 |
| PTA Connecticut CongressFairfield | Form 990-N | No figure |
| Bridgeport Hospital School of Nursing Alumnae Association IncShelton | Form 990-N | No figure |
| Bethany PTOBethany | Form 990-EZ | $21,676FY2025 |
| Newtown Historical Society IncNewtown | Form 990-N | No figure |
| First Ecclesiastical Society of Stratford IncStratford | Form 990 | $20,986FY2026 |
| PTSA Connecticut IncRidgefield | Form 990-N | No figure |
| Parent Teacher Association of ConnecticutNorwalk | Form 990-N | No figure |