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Form 990-PFTax year 2025EIN 94-6089512

A P Giannini Foundation

A private foundation in San Rafael, CA. Its return for tax year 2025 lists 19 grants and $1.2 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

Accepts applications

The return gives an application contact and rules, as below.

Contact
Ken Blum Administrator
PO Box 6106
San Rafael, CA 94903
(415) 981-2966
Form and materials
See exhibit 1
Deadlines
See exhibit 1
Restrictions
See exhibit 1

Assets and giving by year

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

  • Tax year 2025

    $1,243,000

    Grants listed
    19
    Assets, end of year
    $30,001,895

  • Tax year 2024

    $1,111,000

    Grants listed
    18
    Assets, end of year
    $28,065,913

  • Tax year 2023

    $1,075,000

    Grants listed
    19
    Assets, end of year
    $26,484,221

  • Tax year 2022

    $974,673

    Grants listed
    19
    Assets, end of year
    $25,150,272

  • Tax year 2021

    $820,614

    Grants listed
    16
    Assets, end of year
    $29,460,942

  • Tax year 2020

    $1,239,000

    Grants listed
    23
    Assets, end of year
    $26,078,476

  • Tax year 2019

    $1,203,000

    Grants listed
    23
    Assets, end of year
    $25,540,466

  • Tax year 2018

    $1,117,000

    Grants listed
    22
    Assets, end of year
    $22,827,155

Grants paid in 2025

19 grants, largest first

As listed on the return.

  1. Stanford University School of MedicinePalo Alto, CA

    For medical research fellowship-basto

    $70,000
  2. Stanford University School of MedicinePalo Alto, CA

    For medical research fellowship-chanin

    $70,000
  3. Stanford University School of MedicinePalo Alto, CA

    For medical research fellowship-van egeren

    $70,000
  4. Stanford University School of MedicinePalo Alto, CA

    For medical research fellowship-li

    $70,000
  5. UC Irvine School of MedicineIrvine, CA

    For medical research fellowship-yonan

    $70,000
  6. UC Irvine School of MedicineIrvine, CA

    For medical research fellowship-pendlebury

    $70,000
  7. UC San Diego School of MedicineLa Jolla, CA

    For medical research fellowship-ngo

    $70,000
  8. UC San Diego School of MedicineLa Jolla, CA

    For medical research fellowship-doud

    $70,000
  9. UC San Francisco School of MedicineSan Francisco, CA

    For medical research fellowship-jin

    $70,000
  10. UC San Francisco School of MedicineSan Francisco, CA

    For medical research fellowship-konjikusic

    $70,000
  11. UC San Francisco School of MedicineSan Francisco, CA

    For medical research fellowship-fan

    $70,000
  12. UC San Francisco School of MedicineSan Francisco, CA

    For medical research fellowship-mengaswasser

    $70,000
  13. UC San Francisco School of MedicineSan Francisco, CA

    For medical research fellowship-simon

    $70,000
  14. UC San Francisco School of MedicineSan Francisco, CA

    For medical research fellowship-zhao

    $70,000
  15. David Geffen School of Medicine at UCLALos Angeles, CA

    For medical research fellowship-campbell

    $64,000
  16. David Geffen School of Medicine at UCLALos Angeles, CA

    For medical research fellowship-ryan

    $64,000
  17. UC Davis School of MedicineSacramento, CA

    For medical research fellowship-cardfor medical research fellowship-card

    $64,000
  18. UC San Francisco School of MedicineSan Francisco, CA

    For medical research fellowship-wang

    $64,000
  19. Ap Giannini Middle School PTASan Francisco, CA

    For student award program and production of student-teacher binders

    $7,000

Approved for future payment

12 grants

Approved in 2025 and not yet paid.

  1. Stanford University School of MedicinePalo Alto, CA

    For medical research fellowship-li

    $140,000
  2. UC San Francisco School of MedicineSan Francisco, CA

    For medical research fellowship-simon

    $140,000
  3. UC Irvine School of MedicineIrvine, CA

    For medical research fellowship-pendlebury

    $140,000
  4. UC San Francisco School of MedicineSan Francisco, CA

    For medical research fellowship-zhao

    $140,000
  5. UC San Francisco School of MedicineSan Francisco, CA

    For medical research fellowship-fan

    $140,000
  6. UC San Diego School of MedicineLa Jolla, CA

    For medical research fellowship-ngo

    $140,000
  7. Stanford University School of MedicinePalo Alto, CA

    For medical research fellowship-basto

    $70,000
  8. Stanford University School of MedicinePalo Alto, CA

    For medical research fellowship-chanin

    $70,000
  9. Stanford University School of MedicinePalo Alto, CA

    For medical research fellowship-van egeren

    $70,000
  10. UC San Francisco School of MedicineSan Francisco, CA

    For medical research fellowship-jin

    $70,000
  11. UC Irvine School of MedicineIrvine, CA

    For medical research fellowship-yonan

    $70,000
  12. UC San Francisco School of MedicineSan Francisco, CA

    For medical research fellowship-mengawasser

    $70,000

Where the money goes

By State

Grants to organizations with a US address, latest year.

  1. California19 grants $1,243,000

Officers, directors and trustees

9 people as filed

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

  • Mike MantleTREASURER Hours 0Pay $0
  • Virginia HammernessDIRECTOR - (DEC'D 05/31/25) Hours 0Pay $0
  • Mark C PerryCHAIRMAN Hours 0Pay $0
  • Bruce U Wintroub MDDIRECTOR Hours 0Pay $0
  • Keith GrossmanDIRECTOR Hours 0Pay $0
  • Jack L MeyersVICE-CHAIRMAN Hours 0Pay $0
  • Anne McWilliamsEMERITUS TRUSTEE Hours 0Pay $0
  • Keith McWilliamsSECRETARY Hours 0Pay $0
  • Mark ChaomdphdDIRECTOR Hours 0Pay $0

The return

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