The California State Capitol

Form 990-PFTax year 2024EIN 47-2387065

Caldera Foundation

A private foundation in Vineburg, CA. Its return for tax year 2024 lists 11 grants and $511,000 paid in grants.

Tax year 2024 (period ending Jun 30, 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

7 returns on file
Grants paid by tax year. The latest year is in blue.
  • Tax year 2024

    $511,000

    Grants listed
    11
    Assets, end of year
    $10,433,232
  • Tax year 2023

    $410,000

    Grants listed
    13
    Assets, end of year
    $9,697,823
  • Tax year 2022

    $547,000

    Grants listed
    13
    Assets, end of year
    $8,920,110
  • Tax year 2020

    $0

    Grants listed
    0
    Assets, end of year
    $8,228,096
  • Tax year 2019

    $488,000

    Grants listed
    13
    Assets, end of year
    $8,228,096
  • Tax year 2018

    $510,000

    Grants listed
    18
    Assets, end of year
    $8,729,711
  • Tax year 2017

    $535,000

    Grants listed
    16
    Assets, end of year
    $9,817,346

Grants paid in 2024

11 grants, largest first

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

  1. Ploughshares FundSan Francisco, CA

    Financial support

    $100,000
  2. Rocky Mountain InstituteBasalt, CO

    Financial support for rocky mountain institute

    $50,000
  3. Issue OneWashington, DC

    Financial support

    $50,000
  4. Pacific InstituteOakland, CA

    Financial support

    $50,000
  5. Individual

    Financial support

    $50,000
  6. Campaign Legal CenterWashington, DC

    Financial support

    $50,000
  7. Clean Energy Communities FundBerkeley, CA

    Financial support

    $50,000
  8. Amalgamated Charitable FoundationWashington, DC

    Financial support

    $50,000
  9. The Good Information FoundationLong Is City, NY

    Financial support

    $35,000
  10. American Independent FoundationWashington, DC

    Financial support

    $25,000
  11. Individual

    Financial support

    $1,000

Where the money goes

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

  1. International aid1 grant $100,00035% of the total
  2. Crime and legal aid1 grant $50,00018% of the total
  3. Philanthropy and grantmaking1 grant $50,00018% of the total
  4. Public affairs1 grant $50,00018% of the total
  5. Arts and culture1 grant $35,00012% of the total

By State

Grants to organizations with a US address, latest year.

  1. California3 grants $200,000
  2. District of Columbia4 grants $175,000
  3. Colorado1 grant $50,000
  4. New York1 grant $35,000

Officers, directors and trustees

2 people as filed

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

  • Margaret G BoyerPRESIDENT Hours 10Pay $0
  • Peter S BoyerSec. &Treasurer Hours 10Pay $0

The return

More foundations

Similar foundations

Same main cause (international aid), giving between a quarter and four times this foundation’s where possible, nearby first.

  1. Lucille Ellis Simon FoundationSanta Monica, CA 90 grants Preselected only $515,500 giving
  2. The Toshizo Watanabe FoundationLos Angeles, CA 1 grant Preselected only $500,000 giving
  3. October Saints FoundationSan Francisco, CA 9 grants Preselected only $500,000 giving
  4. Nora Tertzag Hampar Charitable TrustBeverly Hills, CA 18 grants Preselected only $522,500 giving
  5. Ralph and Hazel Osborn and Lois J Roork Charitable TrustSeal Beach, CA 7 grants Preselected only $525,000 giving