A river running through a deep pine forest valley

Grant recipient EIN 52-1833599Environment

Who funds Sightline Institute?

35 private foundations gave Sightline Institute in Seattle, WA $9.9 million across 135 grants, in tax years 2017 to 2025.

Grants listed on funders’ 990-PF returns for tax years 2017 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.

Grants received by year

Grants from private foundations by the funder’s tax year. The latest year is in blue; it is not complete until all its returns reach the IRS.

Every foundation grant, by year

135 grants

Each line as the funder listed it on its return, newest year first, then largest.

  1. Ronald W Naito MD FoundationPortland, OR 2025

    General operating support

    $30,000
  2. Cosman Family FDN Dima-WdpPennington, NJ 2025

    Unrestricted general

    $17,000
  3. Martin Djos Family FoundationHailey, ID 2025

    General

    $1,555
  4. Kaphan FoundationSeattle, WA 2024

    General support

    $572,649
  5. Laidir FoundationSeattle, WA 2024

    To further the mission of sightline institute's housing and urbanism program.

    $525,000
  6. Democracy Fund IncWashington, DC 2024

    Program support for the Democracy and Elections Program

    $175,000
  7. The Schmidt Family FoundationPalo Alto, CA 2024

    Encouraging a just transition away from fossil fuels

    $150,000
  8. Treeline FoundationSeattle, WA 2024

    To support efforts to address climate change

    $100,000
  9. The Bullitt FoundationSeattle, WA 2024

    For a general support exit grant.

    $95,000
  10. Wiancko Charitable Foundation IncSeattle, WA 2024

    Unrestricted

    $35,000
  11. Ronald W Naito MD FoundationPortland, OR 2024

    General operating

    $30,000
  12. Ordinary People FoundationBellevue, WA 2024

    Environmental Protection

    $30,000
  13. Laird Norton Family FoundationSeattle, WA 2024

    General operating support

    $30,000
  14. Cosman Family FDN Dima-WdpPennington, NJ 2024

    Unrestricted general

    $16,000
  15. Eric Anderson FoundationSeattle, WA 2024

    General support

    $15,000
  16. Ridge Road FoundationBellevue, WA 2024

    Contribution to be used for charitable purposes

    $11,000
  17. Grousemont FoundationSeattle, WA 2024

    General & unrestricted

    $10,000
  18. So Hum FoundationPortland, OR 2024

    General operating support

    $5,000
  19. Martin Djos Family FoundationHailey, ID 2024

    General

    $1,037
  20. The GreerSolien FundWilmington, DE 2024

    General & Unrestricted

    $1,000
  21. Edwards Lienhart Family FoundationPortland, OR 2024

    Unrestricted-general fund support

    $1,000
  22. Reuben's Brews FoundationSeattle, WA 2024

    501c3 organization - social

    $250
  23. The Pfizer Foundation IncNew York, NY 2024

    Volunteer program

    $100
  24. Kaphan FoundationSeattle, WA 2023

    General support

    $556,094
  25. Laidir FoundationSeattle, WA 2023

    To further the mission of sightline institute's housing and urbanism program.

    $525,000
  26. Democracy Fund IncWashington, DC 2023

    Program support for the Democracy and Elections Program

    $175,000
  27. Treeline FoundationSeattle, WA 2023

    To support efforts to address climate change

    $100,000
  28. The Schmidt Family FoundationPalo Alto, CA 2023

    Encouraging a just transition away from fossil fuels

    $75,000
  29. Stolte Family FoundationSeattle, WA 2023

    Funding for general charitable operations

    $50,000
  30. Wiancko Charitable Foundation IncSeattle, WA 2023

    Unrestricted

    $35,000
  31. Laird Norton Family FoundationSeattle, WA 2023

    General operating support

    $30,000
  32. North Star Collaborative FoundationPortland, OR 2023

    Supporting reseach and public education

    $25,000
  33. Ronald W Naito MD FoundationPortland, OR 2023

    Operating support of research and communications advancing smart, sustainable solutions for cascadia

    $20,000
  34. Ordinary People FoundationBellevue, WA 2023

    Environmental Protection

    $20,000
  35. Cosman Family FDN Dima-WdpPennington, NJ 2023

    Unrestricted general

    $16,000
  36. Eric Anderson FoundationSeattle, WA 2023

    General support

    $15,000
  37. Ridge Road FoundationBellevue, WA 2023

    Contribution to be used for charitable purposes

    $11,000
  38. Grousemont FoundationSeattle, WA 2023

    General & unrestricted

    $10,000
  39. So Hum FoundationPortland, OR 2023

    General operating support

    $5,000
  40. The Bank of America Charitable Foundation IncCharlotte, NC 2023

    Program/operating support

    $2,500
  41. The Bank of America Charitable Foundation IncCharlotte, NC 2023

    Program/operating support

    $2,500
  42. The Alan J Hirschfield Family FoundationJackson, WY 2023

    Note 1

    $2,500
  43. The GreerSolien FundWilmington, DE 2023

    General & Unrestricted

    $1,000
  44. Edwards Lienhart Family FoundationPortland, OR 2023

    Unrestricted-general fund support

    $1,000
  45. Martin Djos Family FoundationHailey, ID 2023

    General

    $518
  46. Amazonsmile FoundationSeattle, WA 2023

    General support

    $40
  47. Laidir FoundationSeattle, WA 2022

    To further the mission of sightline institute's housing and urbanism program.

    $525,000
  48. Kaphan FoundationSeattle, WA 2022

    General support

    $490,599
  49. Treeline FoundationSeattle, WA 2022

    To support efforts to address climate change

    $100,000
  50. The Bullitt FoundationSeattle, WA 2022

    For a general support exit grant.

    $95,000
  51. The Schmidt Family FoundationPalo Alto, CA 2022

    Encouraging a just transition away from fossil fuels

    $75,000
  52. Stolte Family FoundationSeattle, WA 2022

    Funding for general charitable operations

    $50,000
  53. Wiancko Charitable Foundation IncSeattle, WA 2022

    Unrestricted

    $30,000
  54. Ronald W Naito MD FoundationPortland, OR 2022

    Op. Support of research & comm. Advancing smart, sustainable solutions for cascadia

    $30,000
  55. Laird Norton Family FoundationSeattle, WA 2022

    General operating support

    $30,000
  56. North Star Collaborative FoundationPortland, OR 2022

    Supporting reseach and public education

    $25,000
  57. Harder FoundationNaples, FL 2022

    Smart solutions for cascadian energy

    $25,000
  58. Cosman Family FDN Dima-WdpPennington, NJ 2022

    Unrestricted general

    $16,000
  59. Eric Anderson FoundationSeattle, WA 2022

    General support

    $10,000
  60. Grousemont FoundationSeattle, WA 2022

    General & unrestricted

    $10,000
  61. Ridge Road FoundationBellevue, WA 2022

    Contribution to be used for charitable purposes

    $10,000
  62. So Hum FoundationPortland, OR 2022

    General operating support

    $5,000
  63. Laird Norton Family FoundationSeattle, WA 2022

    General operating support

    $5,000
  64. The Alan J Hirschfield Family FoundationJackson, WY 2022

    Note 1

    $2,500
  65. Democracy WorksSeattle, WA 2022

    justice and sustainability

    $200
  66. Amazonsmile FoundationSeattle, WA 2022

    General support

    $81
  67. Laidir FoundationSeattle, WA 2021

    To further the mission of sightline institute's housing and urbanism program.

    $525,000
  68. Kaphan FoundationSeattle, WA 2021

    General support

    $466,906
  69. Treeline FoundationSeattle, WA 2021

    To support efforts to address climate change

    $100,000
  70. The Bullitt FoundationSeattle, WA 2021

    To provide research and analysis in support of banning fossil fuel infrastructure, reforming parking rules, and promoting regenerative land use.

    $95,000
  71. The Schmidt Family FoundationPalo Alto, CA 2021

    Encouraging a just transition away from fossil fuels

    $75,000
  72. CAM Foundation for Young MindsSan Antonio, TX 2021

    General Purpose

    $50,000
  73. Stolte Family FoundationSeattle, WA 2021

    Funding for general charitable operations

    $50,000
  74. Laird Norton Family FoundationSeattle, WA 2021

    General operating support

    $40,000
  75. Wiancko Charitable Foundation IncSeattle, WA 2021

    Unrestricted

    $30,000
  76. Harder FoundationNaples, FL 2021

    The thin green line-opposing fossil fuel

    $25,000
  77. Ordinary People FoundationBellevue, WA 2021

    Environmental Protection

    $20,000
  78. Cosman Family FDN Dima-WdpPennington, NJ 2021

    Unrestricted general

    $12,000
  79. Eric Anderson FoundationSeattle, WA 2021

    General support

    $10,000
  80. Kaleidoscope FoundationBellevue, WA 2021

    Conservation - fossil fuel work

    $9,000
  81. So Hum FoundationPortland, OR 2021

    Funding to put smart policy solutions in the hands of decision makers.

    $5,000
  82. The Bank of America Charitable Foundation IncCharlotte, NC 2021

    Operational support

    $2,500
  83. The Alan J Hirschfield Family FoundationJackson, WY 2021

    Note 1

    $2,500
  84. The GreerSolien FundWilmington, DE 2021

    General & Unrestricted

    $1,000
  85. Democracy WorksSeattle, WA 2021

    education & justice

    $100
  86. Amazonsmile FoundationSeattle, WA 2021

    General support

    $86
  87. Laidir FoundationSeattle, WA 2020

    To further the mission of sightline institute's housing and urbanism program.

    $500,000
  88. Kaphan FoundationSeattle, WA 2020

    General support

    $380,382
  89. The Schmidt Family FoundationPalo Alto, CA 2020

    General operating support

    $150,000
  90. Treeline FoundationSeattle, WA 2020

    To support efforts to address climate change

    $100,000
  91. CAM Foundation for Young MindsSan Antonio, TX 2020

    General Purpose

    $50,000
  92. Stolte Family FoundationSeattle, WA 2020

    Funding for general charitable operations

    $50,000
  93. Laird Norton Family FoundationSeattle, WA 2020

    General operating support

    $40,000
  94. Harder FoundationNaples, FL 2020

    The thin green line-opposing new fossil fuel

    $25,000
  95. Ordinary People FoundationBellevue, WA 2020

    Environmental protection

    $20,000
  96. Wiancko Charitable Foundation IncSeattle, WA 2020

    Unrestricted

    $18,000
  97. Cosman Family FDN Dima-WdpPennington, NJ 2020

    Unrestricted general

    $12,000
  98. Ridge Road FoundationBellevue, WA 2020

    Contribution to be used for charitable purposes

    $10,000
  99. So Hum FoundationPortland, OR 2020

    Funding to put smart policy solutions in the hands of decision makers.

    $5,000
  100. The Winky Foundation Co Wilmington Trust CoWilmington, DE 2020

    General and/or educational purpose

    $3,000
  101. The Alan J Hirschfield Family FoundationJackson, WY 2020

    Note 1

    $2,500
  102. Laird Norton Family FoundationSeattle, WA 2020

    General operating support

    $500
  103. Democracy WorksSeattle, WA 2020

    economic democracy

    $200
  104. Amazonsmile FoundationSeattle, WA 2020

    General support

    $75
  105. Laidir FoundationSeattle, WA 2019

    To further the mission of sightline institute's housing and urbanism program.

    $475,000
  106. Kaphan FoundationSeattle, WA 2019

    General support

    $253,193
  107. The Schmidt Family FoundationPalo Alto, CA 2019

    General support

    $150,000
  108. Treeline FoundationSeattle, WA 2019

    To support efforts to address climate change

    $100,000
  109. The Bullitt FoundationSeattle, WA 2019

    Project support

    $95,000
  110. CAM Foundation for Young MindsSan Antonio, TX 2019

    General Purpose

    $50,000
  111. Stolte Family FoundationSeattle, WA 2019

    Funding for general charitable operations

    $50,000
  112. Riverstyx FoundationSanta Rosa, CA 2019

    Donation

    $50,000
  113. Laird Norton Family FoundationSeattle, WA 2019

    To support sightline's thin green line and farms and forests programs.

    $40,000
  114. Cosman Family FDN Dima-WdpPennington, NJ 2019

    Unrestricted general

    $12,000
  115. Ridge Road FoundationBellevue, WA 2019

    Contribution to be used for charitable purposes

    $8,000
  116. Kaleidoscope FoundationBellevue, WA 2019

    Conservation - fossil fuel work

    $6,000
  117. Bowline FundSeattle, WA 2019

    To support the mission of the Sightline Institute

    $5,000
  118. Meyer Memorial TrustPortland, OR 2019

    For conference sponsorship and travel scholarships to support YIMBYtown 2020

    $5,000
  119. The Alan J Hirschfield Family FoundationJackson, WY 2019

    Note 1

    $2,500
  120. The Bank of America Charitable Foundation IncCharlotte, NC 2019

    Program/operating support

    $2,000
  121. So Hum FoundationPortland, OR 2019

    Funding to put smart policy solutions in the hands of decision makers.

    $1,500
  122. The GreerSolien FundWilmington, DE 2019

    General & Unrestricted

    $1,000
  123. Puget Sound Energy FoundationWilmington, DE 2019

    Employee matching program - general operations

    $155
  124. Laidir FoundationSeattle, WA 2018

    To further the mission of sightline institute's housing and urbanism program.

    $452,000
  125. The Bullitt FoundationSeattle, WA 2018

    Project support

    $95,000
  126. Laird Norton Family FoundationSeattle, WA 2018

    To support sightlines 'thin green line' work to prevent new fossil fuel infrastructure in the pacific northwest.

    $40,000
  127. Riverstyx FoundationSanta Rosa, CA 2018

    Donation

    $30,000
  128. Cosman Family FDN Dima-WdpPennington, NJ 2018

    Unrestricted general

    $10,000
  129. Ridge Road FoundationBellevue, WA 2018

    Contribution to be used for charitable purposes

    $8,000
  130. Bowline FundSeattle, WA 2018

    To support the mission of the Sightline Institute

    $5,000
  131. The Bank of America Charitable Foundation IncCharlotte, NC 2018

    Program/operating support

    $1,042
  132. The Bank of America Charitable Foundation IncCharlotte, NC 2018

    Program/operating support

    $1,000
  133. The GreerSolien FundWilmington, DE 2018

    General & Unrestricted

    $1,000
  134. North Star FoundationCornelius, OR 2018

    Unrestricted

    $1,000
  135. The Alan J Hirschfield Family FoundationJackson, WY 2017

    Note 1

    $2,500

Funders of similar organizations nearby

Foundations that gave to other environment organizations in Seattle, WA and are not among Sightline Institute’s funders above.

  1. PatagoniaorgVentura, CA 57 grants Preselected only $1,023,323 to similar organizations
  2. The Norcliffe FoundationSeattle, WA 32 grants Accepts applications $845,000 to similar organizations
  3. The Russell Family FoundationGig Harbor, WA 63 grants Accepts applications $1,972,262 to similar organizations
  4. The Hugh and Jane Ferguson FoundationSeattle, WA 50 grants Accepts applications $509,500 to similar organizations
  5. The Satterberg Foundation IncSeattle, WA 48 grants Accepts applications $4,027,250 to similar organizations
  6. The Holocene FoundationSeattle, WA 39 grants Preselected only $3,050,000 to similar organizations
  7. The Ron and Eva-Maria Sher FoundationWilmington, DE 16 grants Preselected only $90,000 to similar organizations
  8. Lucky Seven FoundationWilmington, DE 22 grants Accepts applications $308,900 to similar organizations

About this match

Funders write a recipient’s name and address, not its EIN. We matched these grants to EIN 52-1833599 by name and ZIP code against the IRS list of exempt organizations and our list of filers. Grants we could not tie to one organization are not counted here.