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Form 990-PFTax year 2025EIN 36-4139320

The Oakriver Foundation

A private foundation in Northport, MI. Its return for tax year 2025 lists 13 grants and $214,000 paid in grants.

See which foundations fund work like yours Matching by cause, place and grant size

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. It still lists the details below.

Contact
William P Heidrich
820 North Birchwood Drive
Northport, MI 49670
(309) 676-6020
Form and materials
None specified
Deadlines
None
Restrictions
The foundation will make distributions to organizations exclusively for charitable, religious, educational or scientific purposes

Assets and giving by year

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

  • Tax year 2025

    $214,000

    Grants listed
    13
    Assets, end of year
    $3,541,422

  • Tax year 2024

    $216,500

    Grants listed
    13
    Assets, end of year
    $3,712,050

  • Tax year 2023

    $214,000

    Grants listed
    12
    Assets, end of year
    $3,289,032

  • Tax year 2022

    $214,000

    Grants listed
    13
    Assets, end of year
    $3,431,761

  • Tax year 2021

    $218,500

    Grants listed
    15
    Assets, end of year
    $3,337,983

  • Tax year 2020

    $170,000

    Grants listed
    13
    Assets, end of year
    $3,133,631

  • Tax year 2019

    $175,000

    Grants listed
    15
    Assets, end of year
    $3,269,602

  • Tax year 2018

    $191,200

    Grants listed
    14
    Assets, end of year
    $3,288,359

Grants paid in 2025

13 grants, largest first

As listed on the return.

  1. Atwill Memorial ChapelNorthport, MI

    Charitable

    $45,000
  2. Peoria Riverfront MuseumPeoria, IL

    Charitable

    $40,000
  3. University of Michigan LibraryAnn Arbor, MI

    Educational

    $40,000
  4. Phillips Academy Peabody MuseumAndover, MA

    Charitable

    $40,000
  5. Greenwich Country Day SchoolGreenwich, CT

    Educational

    $10,000
  6. Munson Hospital FoundationTraverse City, MI

    Charitable

    $10,000
  7. UCSF FoundationSan Francisco, CA

    Charitable

    $5,000
  8. Shelburne MuseumShelburne, VT

    Charitable

    $5,000
  9. Los Angeles Family SchoolLos Angeles, CA

    Educational

    $5,000
  10. Bluepath Service DogsCarmel, NY

    Charitable

    $5,000
  11. Leelanau ConservancyLeland, MI

    Charitable

    $5,000
  12. IwecPeoria, IL

    Charitable

    $2,500
  13. Benton Art Museum - Pomona CollegeClaremont, CA

    Educational

    $1,500

Where the money goes

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

  1. Arts and culture2 grants $45,00058% of the total
  2. Education3 grants $20,00026% of the total
  3. Animals1 grant $5,0006% of the total
  4. Environment1 grant $5,0006% of the total
  5. Mental health1 grant $2,5003% of the total

By State

Grants to organizations with a US address, latest year.

  1. Michigan4 grants $100,000
  2. Illinois2 grants $42,500
  3. Massachusetts1 grant $40,000
  4. California3 grants $11,500
  5. Connecticut1 grant $10,000
  6. New York1 grant $5,000
  7. Vermont1 grant $5,000

Officers, directors and trustees

4 people as filed

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

  • William P HeidrichTRUSTEE Hours 5Pay $47,500
  • Carolyn ZiebarthsTRUSTEE Hours 5Pay $0
  • William Heidrich IITRUSTEE Hours 5Pay $0
  • Peter HeidrichTRUSTEE Hours 5Pay $0

The return

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