The Minnesota State Capitol

Form 990-PFTax year 2025EIN 81-2450108

Sandcastle Foundation

A private foundation in Eden Prairie, MN. Its return for tax year 2025 lists 41 grants and $940,000 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

    $940,000

    Grants listed
    41
    Assets, end of year
    $11,247,711
  • Tax year 2024

    $800,000

    Grants listed
    32
    Assets, end of year
    $10,719,869
  • Tax year 2023

    $805,000

    Grants listed
    34
    Assets, end of year
    $9,972,369
  • Tax year 2022

    $600,000

    Grants listed
    33
    Assets, end of year
    $9,295,143
  • Tax year 2021

    $440,000

    Grants listed
    32
    Assets, end of year
    $8,638,665
  • Tax year 2020

    $370,000

    Grants listed
    32
    Assets, end of year
    $7,586,511
  • Tax year 2019

    $320,000

    Grants listed
    29
    Assets, end of year
    $5,899,891
  • Tax year 2018

    $240,000

    Grants listed
    27
    Assets, end of year
    $4,947,125

Grants paid in 2025

41 grants, largest first

As listed on the return.

  1. University of St ThomasSaint Paul, MN

    Unrestricted charitable grant

    $75,000
  2. Ujamaa PlaceSaint Paul, MN

    Unrestricted charitable grant

    $70,000
  3. African American Child Wellness InstituteMinneapolis, MN

    Unrestricted charitable grant

    $50,000
  4. Washington UniversitySt Louis, MO

    Unrestricted charitable grant

    $50,000
  5. Boys and Girls Clubs of the Twin CitiesSaint Paul, MN

    Unrestricted charitable grant

    $40,000
  6. Crescent CoveBrooklyn Ctr, MN

    Unrestricted charitable grant

    $40,000
  7. Constellation FundMinneapolis, MN

    Unrestricted charitable grant

    $35,000
  8. AeonMinneapolis, MN

    Unrestricted charitable grant

    $30,000
  9. Eden Prairie Community FoundationEden Prairie, MN

    Unrestricted charitable grant

    $30,000
  10. Planned Parenthood of Minnesota NorthSt Paul, MN

    Unrestricted charitable grant

    $30,000
  11. Summit Academy OicMinneapolis, MN

    Unrestricted charitable grant

    $25,000
  12. Veap IncBloomington, MN

    Unrestricted charitable grant

    $25,000
  13. Achieve Twin CitiesEagan, MN

    Unrestricted charitable grant

    $20,000
  14. Beacon Interfaith HousingSt Paul, MN

    Unrestricted charitable grant

    $20,000
  15. Forest Park Forever IncSaint Louis, MO

    Unrestricted charitable grant

    $20,000
  16. Legal Rights Center IncorporatedMinneapolis, MN

    Unrestricted charitable grant

    $20,000
  17. People Reaching Out to Other PeopleEden Prairie, MN

    Unrestricted charitable grant

    $20,000
  18. Simpson Housing Services IncMinneapolis, MN

    Unrestricted charitable grant

    $20,000
  19. Twin Cities Habitat for HumanitySaint Paul, MN

    Unrestricted charitable grant

    $20,000
  20. YMCAMinneapolis, MN

    Unrestricted charitable grant

    $20,000
  21. American Civil Liberties Union Foundation IncNew York, NY

    Unrestricted charitable grant

    $15,000
  22. Can Do CaninesNew Hope, MN

    Unrestricted charitable grant

    $15,000
  23. Cardinal Glennon Children's HospitalSt Louis, MO

    Unrestricted charitable grant

    $15,000
  24. Domestic Abuse ProjectMinneapolis, MN

    Unrestricted charitable grant

    $15,000
  25. Make A Wish FoundationPhoenix, AZ

    Unrestricted charitable grant

    $15,000
  26. National Alliance for Research on Schizophrenia and DepressionNew York, NY

    Unrestricted charitable grant

    $15,000
  27. Ocean Blue Project IncCorvallis, OR

    Unrestricted charitable grant

    $15,000
  28. Paws ChicagoChicago, IL

    Unrestricted charitable grant

    $15,000
  29. Planned Parenthood Great RiversSt Louis, MO

    Unrestricted charitable grant

    $15,000
  30. President and Trustees of BatesLewiston, ME

    Unrestricted charitable grant

    $15,000
  31. St Jude Childrens Research HospitalMemphis, TN

    Unrestricted charitable grant

    $15,000
  32. The Curators of the University of MissouriColumbia, MO

    Unrestricted charitable grant

    $15,000
  33. The Saint Louis Zoo FoundationSt Louis, MT

    Heim wild care park pledge

    $15,000
  34. Washburn Center for ChildrenMinneapolis, MN

    Unrestricted charitable grant

    $15,000
  35. Wild Canid Survival & ResearchEureka, MO

    Unrestricted charitable grant

    $15,000
  36. American Immigration CouncilWashington, DC

    Unrestricted charitable grant

    $10,000
  37. Americans for Immigrant JusticeMiami, FL

    Unrestricted charitable grant

    $10,000
  38. Children's Hospital and Clinics of MinnesotaMinneapolis, MN

    Unrestricted charitable grant

    $10,000
  39. Hennepin Theatre TrustMinneapolis, MN

    Unrestricted charitable grant

    $10,000
  40. Quest Scholars ProgramPalo Alto, CA

    Unrestricted charitable grant

    $10,000
  41. Minnesota Orchestral AssociationMinneapolis, MN

    Unrestricted charitable grant

    $5,000

Where the money goes

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

  1. Human services2 grants $110,00020% of the total
  2. Education3 grants $85,00016% of the total
  3. Mental health2 grants $65,00012% of the total
  4. Youth development2 grants $55,00010% of the total
  5. Crime and legal aid3 grants $45,0008% of the total
  6. Philanthropy and grantmaking1 grant $35,0006% of the total
  7. 7 other causes9 grants $145,00027% of the total

By State

Grants to organizations with a US address, latest year.

  1. Minnesota24 grants $660,000
  2. Missouri4 grants $95,000
  3. Montana3 grants $50,000
  4. New York2 grants $30,000
  5. Arizona1 grant $15,000
  6. Illinois1 grant $15,000
  7. Maine1 grant $15,000
  8. Oregon1 grant $15,000
  9. Tennessee1 grant $15,000
  10. California1 grant $10,000

Officers, directors and trustees

4 people as filed

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

  • Nancy J HeimPRESIDENT Hours 10Pay $0
  • David HeimDIRECTOR Hours 0Pay $0
  • Michael HeimDIRECTOR Hours 0Pay $0
  • Erik HeimDIRECTOR Hours 0Pay $0

The return

More foundations

Similar foundations

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

  1. Carl and Aune Lind Family FoundationEden Prairie, MN 29 grants Accepts applications $302,000 giving
  2. 44 North Foundation IncMinneapolis, MN 59 grants Preselected only $995,000 giving
  3. Chase Family FoundationBurnsville, MN 25 grants Preselected only $881,237 giving
  4. McVay FoundationMinnetonka, MN 66 grants Preselected only $1,013,500 giving
  5. Adient Foundation IncEagan, MN 61 grants Accepts applications $1,037,261 giving