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Foundation Lookup

Private foundations Connecticuttax years 2023 to 2025

Private foundations in Connecticut

1,860 private foundations based in Connecticut filed a 990-PF in the last two years. In their latest returns they gave $3.3 billion in 30,340 grants, and 342 say they accept applications.

See which foundations fund work like yours Matching by cause, place and grant size

Foundations with a return in the last two years, each by its latest return (tax years 2023 to 2025), read from the IRS e-file on Nov 11, 2026. Returns reach the IRS 5 to 18 months after the year they describe.

Largest givers

By grants paid, latest return
  1. Boehringer Ingelheim Cares Foundation IncRidgefield, CT · tax year 2025 Grants listed in an attachment (not in the e-file) Accepts applications $1,988,478,993 giving
  2. Alexion Access FoundationNew Haven, CT · tax year 2025 6 grants Accepts applications $131,858,380 giving
  3. Steven & Alexandra Cohen Foundation IncStamford, CT · tax year 2024 191 grants Preselected only $130,036,842 giving
  4. Dalio Foundation IncWestport, CT · tax year 2024 214 grants Preselected only $50,888,478 giving
  5. The Tow Foundation IncNew Canaan, CT · tax year 2025 206 grants Preselected only $46,839,114 giving
  6. Halvorsen Family FoundationStamford, CT · tax year 2024 33 grants Preselected only $34,502,270 giving
  7. The Jane and Daniel Och Family FoundationGreenwich, CT · tax year 2024 Grants listed in an attachment (not in the e-file) Preselected only $30,875,805 giving
  8. The Zoom FoundationGreenwich, CT · tax year 2024 7 grants Preselected only $30,426,000 giving
  9. Seedlings FoundationBranford, CT · tax year 2025 96 grants Preselected only $28,278,954 giving
  10. Cohen Veterans Network IncStamford, CT · tax year 2024 46 grants Preselected only $27,499,321 giving
  11. Synchrony FoundationStamford, CT · tax year 2025 374 grants Preselected only $21,498,289 giving
  12. GE Aerospace FoundationNorwalk, CT · tax year 2024 2,467 grants Accepts applications $15,267,657 giving
  13. The FB Heron FoundationNew Haven, CT · tax year 2024 77 grants Accepts applications $14,786,601 giving
  14. The Herb Chambers Charitable FoundationGlastonbury, CT · tax year 2024 49 grants Preselected only $13,792,901 giving
  15. The Leir Foundation IncRidgefield, CT · tax year 2024 2 grants Preselected only $12,721,614 giving
  16. The Melville Charitable Trust IncNew Haven, CT · tax year 2024 54 grants Accepts applications $12,366,430 giving
  17. Newman's Own FoundationWestport, CT · tax year 2024 169 grants Preselected only $12,000,000 giving
  18. Aronson Family FoundationWestport, CT · tax year 2024 1 grant Preselected only $11,087,805 giving
  19. Lone Pine Foundation IncGreenwich, CT · tax year 2024 Grants listed in an attachment (not in the e-file) Preselected only $10,361,955 giving
  20. Low Road FoundationSharon, CT · tax year 2024 Grants listed in an attachment (not in the e-file) Preselected only $9,945,075 giving
  21. E Matilda Ziegler Foundation for the BlindGreenwich, CT · tax year 2024 3 grants Accepts applications $9,939,000 giving
  22. The HSCC Stone Family FoundationNorwalk, CT · tax year 2024 10 grants Preselected only $8,911,100 giving
  23. Leon Lowenstein Foundation IncMadison, CT · tax year 2025 103 grants Preselected only $7,960,000 giving
  24. The Rutledge Family FoundationGreenwich, CT · tax year 2024 23 grants Preselected only $7,649,568 giving
  25. The Grossman Family FoundationCos Cob, CT · tax year 2024 1 grant Preselected only $7,533,326 giving

Foundations that accept applications

Largest first

The return gives an application contact and does not check the preselected-only box.

  1. Boehringer Ingelheim Cares Foundation IncRidgefield, CT · tax year 2025 Grants listed in an attachment (not in the e-file) Accepts applications $1,988,478,993 giving
  2. Alexion Access FoundationNew Haven, CT · tax year 2025 6 grants Accepts applications $131,858,380 giving
  3. GE Aerospace FoundationNorwalk, CT · tax year 2024 2,467 grants Accepts applications $15,267,657 giving
  4. The FB Heron FoundationNew Haven, CT · tax year 2024 77 grants Accepts applications $14,786,601 giving
  5. The Melville Charitable Trust IncNew Haven, CT · tax year 2024 54 grants Accepts applications $12,366,430 giving
  6. E Matilda Ziegler Foundation for the BlindGreenwich, CT · tax year 2024 3 grants Accepts applications $9,939,000 giving
  7. Eversource Energy Foundation IncHartford, CT · tax year 2024 606 grants Accepts applications $6,163,548 giving
  8. Worldquant FoundationOld Greenwich, CT · tax year 2024 7 grants Accepts applications $6,148,801 giving
  9. William Caspar Graustein Memorial FundHamden, CT · tax year 2024 167 grants Accepts applications $5,067,225 giving
  10. Edward John Noble Foundation IncGreenwich, CT · tax year 2024 41 grants Accepts applications $4,964,230 giving
  11. Rhoda & David Chase Family Foundation IncHartford, CT · tax year 2024 47 grants Accepts applications $4,517,367 giving
  12. The Jane Coffin Childs Memorial Fund for Medical ResearchNew Haven, CT · tax year 2024 58 grants Accepts applications $4,071,767 giving
  13. The Patrick and Catherine Weldon Donaghue Medical Research FoundationWest Hartford, CT · tax year 2025 22 grants Accepts applications $3,635,071 giving
  14. Mulberry Essence FoundationGreenwich, CT · tax year 2024 63 grants Accepts applications $3,523,093 giving
  15. American Savings Foundation IncNew Britain, CT · tax year 2025 613 grants Accepts applications $3,365,284 giving
  16. Silver Family FoundationDarien, CT · tax year 2024 50 grants Accepts applications $3,182,693 giving
  17. Avangrid Foundation IncOrange, CT · tax year 2025 72 grants Accepts applications $3,151,911 giving
  18. John Brown Cook FoundationChester, CT · tax year 2025 15 grants Accepts applications $3,100,000 giving
  19. The Elinor Patterson Baker FoundationGreenwich, CT · tax year 2025 Grants listed in an attachment (not in the e-file) Accepts applications $3,029,950 giving
  20. The Fred C Gloeckner Foundation IncNew Canaan, CT · tax year 2024 1 grant Accepts applications $3,027,294 giving
  21. Connecticut Health Foundation IncHartford, CT · tax year 2024 95 grants Accepts applications $2,589,916 giving
  22. Sullivan FoundationWest Hartford, CT · tax year 2025 20 grants Accepts applications $2,494,750 giving
  23. The Maximilian E and Marion O Hoffman Foundation IncWest Hartford, CT · tax year 2024 54 grants Accepts applications $2,052,090 giving
  24. Dellora A & Lester J Norris FoundationGreenwich, CT · tax year 2025 Grants listed in an attachment (not in the e-file) Accepts applications $2,043,200 giving
  25. The Riversville FoundationGreenwich, CT · tax year 2024 11 grants Accepts applications $1,915,870 giving

Giving by cause

Grants to organizations we matched to the IRS list of exempt organizations, by their category.

  1. Education698 foundations $130,937,14523% of the total
  2. Philanthropy and grantmaking344 foundations $108,694,35719% of the total
  3. Health454 foundations $54,855,57710% of the total
  4. Community development159 foundations $51,947,6239% of the total
  5. Human services500 foundations $45,622,1418% of the total
  6. Arts and culture505 foundations $38,897,1097% of the total
  7. 19 other causes $138,357,43124% of the total

Most active small givers

Foundations with under $1 million in assets, by the number of grants they listed.

  1. The Old Stones Foundation IncStamford, CT · tax year 2024 83 grants Preselected only $373,800 giving
  2. O'Meara Foundation IncWethersfield, CT · tax year 2024 80 grants Preselected only $450,250 giving
  3. The Crosswols FoundationStamford, CT · tax year 2025 73 grants Preselected only $106,100 giving
  4. Storper FoundationWest Hartford, CT · tax year 2025 71 grants Preselected only $47,233 giving
  5. Janet Stone Jones FoundationStamford, CT · tax year 2025 70 grants Preselected only $205,220 giving
  6. The Hallingby Family Foundation IncSharon, CT · tax year 2024 70 grants Preselected only $87,600 giving
  7. Martha Washington Straus-Harry H Straus Foundation IncStamford, CT · tax year 2025 65 grants Preselected only $704,000 giving
  8. Aldo Dedominicis Foundation IncHamden, CT · tax year 2025 64 grants Preselected only $76,850 giving
  9. CLSJ Foundation IncWest Hartford, CT · tax year 2025 64 grants Preselected only $68,320 giving
  10. Vianda Playter Williams Foundation IncGreenwich, CT · tax year 2025 58 grants Preselected only $15,900 giving
  11. The Sooner FoundationStamford, CT · tax year 2025 53 grants Preselected only $92,450 giving
  12. The Sachs Family FoundationWestport, CT · tax year 2025 49 grants Preselected only $82,997 giving
  13. Barnabas Foundation IncTariffville, CT · tax year 2025 49 grants Preselected only $19,148 giving
  14. Weinerman Foundation IncClinton, CT · tax year 2025 49 grants Accepts applications $8,743 giving
  15. Bruised Camel Charitable FoundationincGreenwich, CT · tax year 2024 48 grants Preselected only $123,155 giving

Cities

14 cities with 25 or more foundations
123 more cities with two or more