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Form 990-PFTax year 2025EIN 47-2442291

Sandstone Foundation

A private foundation in Mayfield HTS, OH. Its return for tax year 2025 lists 26 grants and $198,503 paid in grants.

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

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

8 returns on file
Grants paid by tax year. The latest year is in blue.
  • Tax year 2025

    $198,503

    Grants listed
    26
    Assets, end of year
    $1,297,208
  • Tax year 2024

    $85,448

    Grants listed
    18
    Assets, end of year
    $901,942
  • Tax year 2023

    $245,454

    Grants listed
    24
    Assets, end of year
    $767,711
  • Tax year 2022

    $309,936

    Grants listed
    26
    Assets, end of year
    $797,427
  • Tax year 2021

    $229,597

    Grants listed
    25
    Assets, end of year
    $997,289
  • Tax year 2020

    $247,397

    Grants listed
    21
    Assets, end of year
    $620,582
  • Tax year 2019

    $293,177

    Grants listed
    20
    Assets, end of year
    $726,573
  • Tax year 2018

    $160,000

    Grants listed
    9
    Assets, end of year
    $950,013

Grants paid in 2025

26 grants, largest first

As listed on the return.

  1. Positive Education ProgramCleveland, OH

    General

    $37,516
  2. UCLA FoundationSanta Monica, CA

    General

    $31,500
  3. The Bail ProjectVenice, CA

    General

    $30,000
  4. A Place for MeCleveland, OH

    General

    $25,000
  5. ACLU of OhioCleveland, OH

    General

    $20,000
  6. Museum of Contemporary Art (moca)Cleveland, OH

    General

    $7,500
  7. Sisters of Notre DameChardon, OH

    General

    $7,500
  8. Team Seneca NavyCleveland, OH

    General

    $7,500
  9. Cleveland PlayhouseCleveland, OH

    General

    $5,000
  10. The Cleveland FoundationCleveland, OH

    General

    $5,000
  11. La Jolla PlayhouseLa Jolla, CA

    General

    $3,000
  12. Playhouse SquareCleveland, OH

    General

    $3,000
  13. The Old GlobeSan Diego, CA

    General

    $3,000
  14. BorderlightCleveland, OH

    General

    $2,557
  15. Greater Cleveland FoodbankCleveland, OH

    General

    $2,073
  16. Open DoorsCleveland, OH

    General

    $2,000
  17. Chagrin History CenterChagrin Falls, OH

    General

    $1,500
  18. The Centers for Families and ChildrenCleveland, OH

    General

    $1,100
  19. First TeeNewburgh Heights, OH

    General

    $1,000
  20. IdeastreamCleveland, OH

    General

    $800
  21. We Care SolarBerkeley, CA

    General

    $526
  22. Blindspot Collective (mac Blinds)San Diego, CA

    General

    $500
  23. The Children's Tumor FoundationNew York, NY

    General

    $500
  24. American Cancer SocietyCleveland, OH

    General

    $211
  25. Teen Cancer AmericaSanta Monica, CA

    General

    $120
  26. CaringbridgeBloomington, MN

    General

    $100

Where the money goes

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

  1. Mental health1 grant $37,51647% of the total
  2. Crime and legal aid1 grant $30,00037% of the total
  3. Philanthropy and grantmaking1 grant $5,0006% of the total
  4. Arts and culture1 grant $3,0004% of the total
  5. Youth development3 grants $2,9204% of the total
  6. Human services1 grant $1,1001% of the total
  7. 2 other causes3 grants $1,1261% of the total

By State

Grants to organizations with a US address, latest year.

  1. Ohio17 grants $129,257
  2. California7 grants $68,646
  3. New York1 grant $500
  4. Minnesota1 grant $100

Officers, directors and trustees

3 people as filed

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

  • Robert MartensDIRECTOR Hours 5Pay $0
  • Holley Fowler MartensDIRECTOR Hours 5Pay $0
  • Alycia P MartensDIRECTOR Hours 5Pay $0

The return

More foundations

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

  1. The Herbert C Ziegler FoundationMassillon, OH 42 grants Accepts applications $209,000 giving
  2. Frank R Bo Dunlap Foundation IncCircleville, OH 16 grants Accepts applications $218,400 giving
  3. Samuel Reese Willis Foundation IncFairlawn, OH 14 grants Preselected only $175,000 giving
  4. Joseph & Helen Skilken FoundationColumbus, OH 45 grants Accepts applications $230,250 giving
  5. The Wedge Block Foundation ICACleveland, OH 21 grants Preselected only $246,000 giving