| Starfish Connection IncStamford | Form 990-EZ | $78,869FY2025 |
| Bernard Buddy Jordan FoundationBridgeport | Form 990-EZ | $77,754FY2025 |
| Effort to Empower FoundationStamford | Form 990 | $77,659FY2025 |
| Cyberknights Robotics IncSouthington | Form 990-EZ | $77,636FY2024 |
| Weston Intermediate School PTO IncWeston | Form 990-EZ | $77,368FY2025 |
| PTO Northeast SchoolStamford | Form 990-EZ | $77,269FY2025 |
| The Parent Teacher Council of StamfordStamford | Form 990-EZ | $77,130FY2025 |
| Southeastern CT Robotics IncGroton | Form 990-EZ | $76,998FY2025 |
| Africa Education PartnershipSouth Windsor | Form 990-EZ | $76,820FY2024 |
| Warren Public Library IncWarren | Form 990-EZ | $76,091FY2025 |
| The Achievement Fund IncOld Greenwich | Form 990 | $75,391FY2025 |
| Northeastern Educational Research Association IncHamden | Form 990-EZ | $75,351FY2025 |
| Stepping Into ProsperityWoodbridge | Form 990-EZ | $75,000FY2025 |
| Litercy Volunteers-Valley Shore CT IncWestbrook | Form 990-EZ | $74,513FY2025 |
| Dreambig CollegeHartford | Form 990-EZ | $74,367FY2023 |
| Roxbury Organization of Parents and EducatorsStamford | Form 990-EZ | $74,285FY2025 |
| Emma Hart Willard School PTOBerlin | Form 990-EZ | $74,146FY2026 |
| Lifetime Learners Institute IncNorwalk | Form 990-EZ | $74,010FY2025 |
| East Hampton Rotary Foundation IncEast Hampton | Form 990 | $73,154FY2025 |
| Hebron Youth Baseball Association IncHebron | Form 990-EZ | $73,041FY2024 |
| Rotary Club of Thomaston Connecticut IncorporatedThomaston | Form 990-EZ | $72,949FY2025 |
| Conard High School Parent-Teacher Organization IncWest Hartford | Form 990-EZ | $72,455FY2025 |
| Peck Place School Parent Teacher Organization IncorporatedOrange | Form 990-EZ | $72,451FY2025 |
| English Learner Support Services of Fairfield County IncStamford | Form 990-EZ | $72,355FY2026 |
| International Womens Cyber Alliance IncWest Hartford | Form 990-EZ | $71,695FY2024 |
| Friends of Simsbury Crew IncSimsbury | Form 990-EZ | $71,584FY2025 |
| Yale College Mock Trial AssociationNew Haven | Form 990-EZ | $70,889FY2026 |
| Glastonbury High School Parents Organization IncGlastonbury | Form 990-EZ | $70,874FY2025 |
| Colchester Cooperative Parent- Teacher OrganizationColchester | Form 990-EZ | $70,560FY2025 |
| Ridgefield Scholarship Group IncRidgefield | Form 990-EZ | $70,230FY2025 |
| Cles PTO CorpBrookfield | Form 990-EZ | $69,620FY2025 |
| Miracle League of Northern Connecticut IncVernon | Form 990-EZ | $69,324FY2025 |
| Ole Farmers Association North America IncStamford | Form 990-EZ | $68,962FY2025 |
| International Graduate Studies IncBrookfield | Form 990-EZ | $68,753FY2024 |
| William B Nollman Memorial Caddy Scholarship Fund IncGreenwich | Form 990-EZ | $68,741FY2025 |
| Connecticut Teacher of the Year Council IncNorth Branford | Form 990-EZ | $68,377FY2024 |
| The Parent Teacher Council of StamfordStamford | Form 990-EZ | $67,879FY2024 |
| Milford Education Foundation IncMilford | Form 990-EZ | $67,758FY2026 |
| Ccsu Alumni Association IncNew Britain | Form 990 | $67,425FY2025 |
| Haddam Cooperative Nursery Association IncHaddam | Form 990-EZ | $67,395FY2026 |
| Southern Connecticut State University Alumni AssociationNew Haven | Form 990-EZ | $67,339FY2025 |
| East Eagles Endowment Fund IncGlastonbury | Form 990-EZ | $67,269FY2025 |
| Hall High Parent-Teacher Organization IncWest Hartford | Form 990-EZ | $67,250FY2026 |
| Beecher Road School PTOWoodbridge | Form 990-EZ | $66,896FY2025 |
| Pillar Community Development CorporationBloomfield | Form 990-EZ | $66,892FY2024 |
| Hatton Elementary School PTOSouthington | Form 990-EZ | $66,737FY2025 |
| Cheshire High School Band Parents Association IncCheshire | Form 990-EZ | $66,702FY2025 |
| Ramapoo Rifle & Revolver Club IncRidgefield | Form 990-EZ | $66,407FY2025 |
| Wolcott Schools Boosters IncWolcott | Form 990-EZ | $66,396FY2024 |
| Yale Club of BostonOld Saybrook | Form 990-EZ | $65,738FY2025 |