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Private foundations don’t post open calls, so nobody can search them. We read IRS filings instead — 9.6 million grants from 174,053 foundations and grantmaking charities, searchable by what the money was actually for.
12 funders with a record of paying for “geothermal”
Where the money went
Gitlab FoundationSan Francisco, CA
2 matching grants · $800,000 · through 2024Largest: $400,000 to COALFIELD DEVELOPMENT CORPORATION — expand coalfield's micro-credentialing program in the solar, wind, and geothermal sectors in the appalachian region
Carla and David Crane FoundationSan Francisco, CACharity · may take applications
2 matching grants · $694,000 · through 2024Largest: $394,000 to LINDEN TRUST FOR CONSERVATION — for the geothermal initiative
Community Foundation of New JerseyMorristown, NJCharity · may take applications
1 matching grant · $1.1M · through 2024Largest: $1.1M to GEOTHERMAL RESOURCES COUNCIL DBA GEOTHERMAL RISING — agriculture, education or advocacy
Largest: $691,805 to UNIVERSITY OF NEVADA RENO FOUNDATION — statement of work research- 1 wind electrical generation2 3d printing of electronics3 terrain penetrating sensors4 75 ghz rectifier for wireless power transfer5 development of an a…
Largest: $100,000 to HOME ENERGY EFFICIENCY TEAM INC — building from the ground up engaging communities & workforce to plan equitable scale-up of geothermal network deployment around boston
Largest: $213,144 to UNIVERSITY OF MICHIGAN — to research carbon dioxide utilization for geothermal energy production and renewable energy storage
Largest: $12,000 to Emmanuel United Church of Christ — repaid and maintenance of geothermal heating/cooling system and general operating expenses.
Largest: $3.6M to CLEAN AIR TASK FORCE (CATF) — general support and support of super hot rock geothermal energy
Largest: $5,000 to HAMPTON COMMUNITY DAYCARE — geothermal compressor for gym
Largest: $100,000 to DONOR ADVISED CHARITABLE GIVING INC — geothermal power program
Largest: $132,918 to YAYASAN PENGUATAN PARTISIPASI INISIATIF DAN KEMITRAAN MASYA — to improve social accountability mechanisms for communities well-being in geothermal renewable energy projects areas at the sub-national level, piloting in two districts in java, i…
Largest: $127,500 to COLLEGE OF THE ATLANTIC — college of the atlantic campus geothermal assessment
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Source: IRS Form 990-PF Part XV and Form 990 Schedule I, tax years 2019–2025. These are grants already paid, a record of what an organization funds rather than an open call. Private foundations rarely accept unsolicited applications and the route in is usually a program officer; grantmaking charities and associations more often run real application cycles, so check their website. How this data is built, and its limits →