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Form 990-PFTax year 2025EIN 51-0245279

Tortuga Charitable Foundation

A private foundation in Princeton, NJ. Its return for tax year 2025 lists 113 grants and $8.5 million paid in grants.

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Tax year 2025 (period ending Dec 31, 2025), read from the IRS e-file on Nov 11, 2026. Returns reach the IRS 5 to 18 months after the year they describe.

How to apply

Preselected only

The return checks the box saying the foundation gives only to preselected organizations and does not accept unsolicited requests.

Assets and giving by year

8 returns on file
Grants paid by tax year. The latest year is in blue.

  • Tax year 2025

    $8,515,500

    Grants listed
    113
    Assets, end of year
    $112,070,327

  • Tax year 2024

    $8,081,500

    Grants listed
    118
    Assets, end of year
    $106,959,890

  • Tax year 2023

    $7,762,816

    Grants listed
    105
    Assets, end of year
    $95,280,018

  • Tax year 2022

    $7,608,500

    Grants listed
    107
    Assets, end of year
    $99,747,901

  • Tax year 2021

    $7,376,250

    Grants listed
    100
    Assets, end of year
    $110,168,381

  • Tax year 2020

    $6,347,500

    Grants listed
    79
    Assets, end of year
    $86,638,000

  • Tax year 2018

    $6,811,300

    Grants listed
    60
    Assets, end of year
    $35,729,471

  • Tax year 2017

    $2,859,000

    Grants listed
    46
    Assets, end of year
    $34,613,549

Grants paid in 2025

113 grants, largest first

As listed on the return. Grants to individuals show as “Individual”, with purpose and amount only.

  1. Rockefeller Family Fund IncNew York, NY

    Charitable

    $300,000
  2. Resources Legacy FundSacramento, CA

    Charitable

    $200,000
  3. Environmental Integrity ProjectWashington, DC

    Charitable

    $200,000
  4. Spiral House ParkSaugerties, NY

    Charitable

    $175,000
  5. Individual

    Charitable

    $165,000
  6. Bennington College CorporationBennington, VT

    Charitable

    $165,000
  7. Individual

    Charitable

    $150,000
  8. Abortion Care NetworkWashington, DC

    Charitable

    $125,000
  9. Individual

    Charitable

    $125,000
  10. EarthjusticeSan Francisco, CA

    Charitable

    $125,000
  11. Land Trust Alliance IncorporatedWashington, DC

    Charitable

    $125,000
  12. Regenerative Agriculture FoundationMinneapolis, MN

    Charitable

    $125,000
  13. Trustees for AlaskaAnchorage, AK

    Charitable

    $125,000
  14. Just Transition FundKeswick, VA

    Charitable

    $100,000
  15. Individual

    Charitable

    $100,000
  16. Southern Environmental Law CenterCharlottesville, VA

    Charitable

    $100,000
  17. Redford Center IncSan Francisco, CA

    Charitable

    $100,000
  18. Western Environmental Law CenterEugene, OR

    Charitable

    $100,000
  19. Individual

    Charitable

    $100,000
  20. Individual

    Charitable

    $100,000
  21. Alaska Wilderness LeagueWashington, DC

    Charitable

    $100,000
  22. Amigos Bravos IncTaos, NM

    Charitable

    $100,000
  23. Center for Rural AffairsLyons, NE

    Charitable

    $100,000
  24. Individual

    Charitable

    $100,000
  25. Institute for Energy EconomicsValley City, OH

    Charitable

    $100,000
  26. Individual

    Charitable

    $100,000
  27. National Institute for ReproductiveNew York, NY

    Charitable

    $100,000
  28. National Womens Law CenterWashington, DC

    Charitable

    $100,000
  29. Native Americans in PhilanthropyWashington, DC

    Charitable

    $100,000
  30. Oregon Natural Desert Association IBend, OR

    Charitable

    $100,000
  31. Individual

    Charitable

    $100,000
  32. Wildlife Conservation SocietyBronx, NY

    Charitable

    $100,000
  33. Windward FundWashington, DC

    Charitable

    $100,000
  34. Women Donors NetworkSan Francisco, CA

    Charitable

    $100,000
  35. Foodshed CapitalCharlottesvle, VA

    Charitable

    $85,000
  36. University of Washington FoundationSeattle, WA

    Charitable

    $80,000
  37. Mount Grace Land Conservation TrustAthol, MA

    Charitable

    $80,000
  38. Appalachian Mountain Advocates IncLewisburg, WV

    Charitable

    $75,000
  39. Commission ShiftLaredo, TX

    Charitable

    $75,000
  40. Conservation Lands FoundationDurango, CO

    Charitable

    $75,000
  41. Ecdysis FoundationEstelline, SD

    Charitable

    $75,000
  42. Greater Yellowstone Coalition IncBozeman, MT

    Charitable

    $75,000
  43. Guardian Org FoundationWashington, DC

    Charitable

    $75,000
  44. Heart of the Rockies InitiativeMissoula, MT

    Charitable

    $75,000
  45. Home Energy Efficiency Team IncBoston, MA

    Charitable

    $75,000
  46. Interlace Commons IncBristol, VT

    Charitable

    $75,000
  47. Intertribal Agriculture Council IncBillings, MT

    Charitable

    $75,000
  48. MultiplierSan Francisco, CA

    Charitable

    $75,000
  49. Individual

    Charitable

    $75,000
  50. Oregon Desert Land TrustBend, OR

    Charitable

    $75,000
  51. Savanna InstituteMadison, WI

    Charitable

    $75,000
  52. Woodstock Land Conservancy IncWoodstock, NY

    Charitable

    $75,000
  53. Alaska Conservation FoundationAnchorage, AK

    Charitable

    $75,000
  54. Colorado Organization for Latina OpDenver, CO

    Charitable

    $75,000
  55. Dogwood Alliance IncAsheville, NC

    Charitable

    $75,000
  56. Earth Island Institute IncBerkeley, CA

    Charitable

    $75,000
  57. EarthworksWashington, DC

    Charitable

    $75,000
  58. Environmental Law Policy Center ofChicago, IL

    Charitable

    $75,000
  59. Individual

    Charitable

    $75,000
  60. Louisiana Bucket BrigadeNew Orleans, LA

    Charitable

    $75,000
  61. New Venture FundWashington, DC

    Charitable

    $75,000
  62. New Venture FundWashington, DC

    Charitable

    $75,000
  63. New Venture FundWashington, DC

    Charitable

    $75,000
  64. Individual

    Charitable

    $75,000
  65. Partnership for Policy Integrity InAmherst, MA

    Charitable

    $75,000
  66. Scenic Hudson IncPoughkeepsie, NY

    Charitable

    $75,000
  67. Individual

    Charitable

    $75,000
  68. Southeastern Wind Coalition IncChapel Hill, NC

    Charitable

    $75,000
  69. State Democracy ProjectBrooklyn, NY

    Charitable

    $75,000
  70. Individual

    Charitable

    $75,000
  71. New Mexico Wilderness AllianceAlbuquerque, NM

    Charitable

    $70,000
  72. Environmental Advocates NY IncAlbany, NY

    Charitable

    $65,000
  73. Toxic-Free FutureSeattle, WA

    Charitable

    $65,000
  74. WildEarth GuardiansSanta Fe, NM

    Charitable

    $65,000
  75. Friends of Nevada WildernessReno, NV

    Charitable

    $60,000
  76. Wild Earth Society IncorporatedSalt Lake Cty, UT

    Charitable

    $60,000
  77. Alliance for a Green EconomySyracuse, NY

    Charitable

    $50,000
  78. Brigid Alliance IncNew York, NY

    Charitable

    $50,000
  79. Catskill Animal Sanctuary IncSaugerties, NY

    Charitable

    $50,000
  80. Conservation NWSeattle, WA

    Charitable

    $50,000
  81. Humane Education Advocates ReachingMamaroneck, NY

    Charitable

    $50,000
  82. Physicians Committee for ResponsiblWashington, DC

    Charitable

    $50,000
  83. Planned Parenthood South AtlanticRaleigh, NC

    Charitable

    $50,000
  84. Puget Soundkeeper AllianceSeattle, WA

    Charitable

    $50,000
  85. Individual

    Charitable

    $50,000
  86. Spruce Root IncJuneau, AK

    Charitable

    $50,000
  87. Abortion Action Missouri FoundationSaint Louis, MO

    Charitable

    $50,000
  88. Washington WildSeattle, WA

    Charitable

    $50,000
  89. West Virginia Rivers Coalition IncCharleston, WV

    Charitable

    $50,000
  90. Whitman-Walker Foundation IncWashington, DC

    Charitable

    $45,000
  91. Northwest Abortion Access FundPortland, OR

    Charitable

    $40,000
  92. Puget Sound Restoration FundBainbridge Is, WA

    Charitable

    $40,000
  93. Individual

    Charitable

    $32,500
  94. Neo Philanthropy IncNew York, NY

    Charitable

    $30,000
  95. Badlands Conservation AllianceBismarck, ND

    Charitable

    $25,000
  96. Generation180Charlottesvle, VA

    Charitable

    $25,000
  97. Sustainable Markets FoundationNew York, NY

    Charitable

    $25,000
  98. Turtle Survival AllianceCharleston, SC

    Charitable

    $25,000
  99. Wild ArizonaTucson, AZ

    Charitable

    $25,000
  100. Wyoming Wilderness AssociationSheridan, WY

    Charitable

    $25,000
  101. Individual

    Charitable

    $25,000
  102. Individual

    Charitable

    $25,000
  103. Surfrider FoundationSan Clemente, CA

    Charitable

    $25,000
  104. Catskill Mountainkeeper IncLivingstn MNR, NY

    Charitable

    $20,000
  105. Climate Change Leadership InstituteSanta Fe, NM

    Charitable

    $20,000
  106. Esopus Creek Conservancy IncSaugerties, NY

    Charitable

    $20,000
  107. Koala Action IncGlass House Mountains, Australia

    Charitable

    $16,500
  108. Queensland Koala Crusaders IncNoosaville, Australia

    Charitable

    $16,500
  109. Earth Law CenterDurango, CO

    Charitable

    $15,000
  110. Individual

    Charitable

    $10,000
  111. New York Coalition for Healthy SchoMamaroneck, NY

    Charitable

    $10,000
  112. White Feather Farm IncSaugerties, NY

    Charitable

    $10,000
  113. Friends of Dickinson Memorial LibraNorthfield, MA

    Charitable

    $5,000

Where the money goes

By cause: grants to organizations we matched to the IRS list of exempt organizations, by their category.

  1. Environment46 grants $3,420,00061% of the total
  2. Philanthropy and grantmaking2 grants $400,0007% of the total
  3. Education4 grants $300,0005% of the total
  4. Animals5 grants $250,0004% of the total
  5. Food and agriculture3 grants $220,0004% of the total
  6. Health3 grants $220,0004% of the total
  7. 8 other causes13 grants $830,00015% of the total

By State

Grants to organizations with a US address, latest year.

  1. District of Columbia14 grants $1,320,000
  2. New York18 grants $1,280,000
  3. California7 grants $700,000
  4. Washington6 grants $335,000
  5. Oregon4 grants $315,000
  6. Virginia4 grants $310,000
  7. New Mexico4 grants $255,000
  8. Alaska3 grants $250,000
  9. Vermont2 grants $240,000
  10. Massachusetts4 grants $235,000

Officers, directors and trustees

6 people as filed

As filed on the return, with average hours per week and pay from the foundation.

  • Donna ColonTreasurer Hours 5Pay $0
  • Mildred LivingstonPresident Hours 5Pay $0
  • Patricia LivingstonSec'y, Trustee Hours 5Pay $0
  • Robert LivingstonTrustee Hours 5Pay $0
  • Philip LivingstonTrustee Hours 5Pay $0
  • Karen HarrisExec. Director Hours 40Pay $355,768

The return

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