Caldera Foundation
Private foundation · Vineburg, CA · EIN 47-2387065 · reported 2023–2025
37grants reported
$25Kmedian award
$25Klower quartile
$1,000smallest grant
$1.5Mtotal paid
9states reached
3years giving
Gives every year. This foundation reported grants in 2023, 2024, 2025. A funder that shows up year after year is worth a letter even if this year is a no.
Where to write
PO Box 115
Vineburg, CA 95487-0115
Address as registered with the IRS. Most foundations this size have no website and no application form, which is not a dead end: a short letter to this address is the whole process, and almost nobody sends one.
Who they funded
| Recipient and stated purpose | Where | Amount |
|---|---|---|
| Ploughshares Fund FINANCIAL SUPPORT | San Francisco, CA | $150,000 |
| Ploughshares Fund FINANCIAL SUPPORT | San Francisco, CA | $100,000 |
| Campaign Legal Center FINANCIAL SUPPORT | Washington, DC | $100,000 |
| Telos Group FINANCIAL SUPPORT | Washington, DC | $70,000 |
| Rocky Mountain Institute FINANCIAL SUPPORT FOR ROCKY MOUNTAIN INSTITUTE | Basalt, CO | $50,000 |
| Issue One FINANCIAL SUPPORT | Washington, DC | $50,000 |
| Pacific Institute FINANCIAL SUPPORT | Oakland, CA | $50,000 |
| Indivisible Civics Engagement FINANCIAL SUPPORT | San Francisco, CA | $50,000 |
| Campaign Legal Center FINANCIAL SUPPORT | Washington, DC | $50,000 |
| Clean Energy Communities Fund FINANCIAL SUPPORT | Berkeley, CA | $50,000 |
| Amalgamated Charitable Foundation FINANCIAL SUPPORT | Washington, DC | $50,000 |
| Tpw FINANCIAL SUPPORT | Sacramento, CA | $50,000 |
| Union of Concerned Scientist FINANCIAL SUPPORT | Cambridge, MA | $50,000 |
| National Center for Science Educati FINANCIAL SUPPORT | Oakland, CA | $50,000 |
| Forward Globaltpw FINANCIAL SUPPORT | San Francisco, CA | $50,000 |
| Campaign Legal Center FINANCIAL SUPPORT | Washington, DC | $50,000 |
| The Good Information Foundation FINANCIAL SUPPORT | New York, NY | $35,000 |
| American Independent Foundation FINANCIAL SUPPORT | Washington, DC | $25,000 |
| Pacific Forest Trust FINANCIAL SUPPORT FOR PACIFIC FOREST TRUST | San Francisco, CA | $25,000 |
| Climate Central FINANCIAL SUPPORT | Princeton, NJ | $25,000 |
| Clean Energy for America FINANCIAL SUPPORT | Washington, DC | $25,000 |
| Civilians in Conflict FINANCIAL SUPPORT | Washington, DC | $25,000 |
| Climate Voice FINANCIAL SUPPORT | Boone, NC | $25,000 |
| Sustainable Conservation FINANCIAL SUPPORT | San Francisco, CA | $25,000 |
| SF Park Alliance FINANCIAL SUPPORT | San Francisco, CA | $25,000 |
| Hopewell Fund FINANCIAL SUPPORT | Wasington, DC | $25,000 |
| Michigan Donor Alliance FINANCIAL SUPPORT | Ann Arbor, MI | $25,000 |
| American Association for the Advanc FINANCIAL SUPPORT | Washington, DC | $25,000 |
| National Academy of Science FINANCIAL SUPPORT | Washington, DC | $25,000 |
| Indivisible Civics Engagement FINANCIAL SUPPORT | San Francisco, CA | $20,000 |
| Indivisible Civics Engagement FINANCIAL SUPPORT | San Francisco, CA | $20,000 |
| Adventure Scientists FINANCIAL SUPPORT | Bozeman, MT | $20,000 |
| The Good Information Foundation FINANCIAL SUPPORT | New York, NY | $20,000 |
| American Resillence Project FINANCIAL SUPPORT | Florence, MA | $15,000 |
| The Philanthropy Workshop FINANCIAL SUPPORT | New York, NY | $12,000 |
| The Elders FINANCIAL SUPPORT | London | $5,000 |
| Human Rights Watch FINANCIAL SUPPORT | San Francisco, CA | $1,000 |
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