Oak River Foundation

Oak River Foundation is not a grantmaking program in any conventional sense — it is a closed, family-directed giving vehicle. IRS data flags it as "preselected_only," meaning distributions go exclusively to organizations the trustees already know, and the foundation's own filings list no application instructions at all (the field is literally blank in federal records). Control rests entirely with the Heidrich family: William P. Heidrich (trustee, compensation ranging $0-$35,000 across the years on file), Peter Heidrich, William Heidrich II, and Carolyn Ziebarths, unchanged since the foundation's December 1997 IRS ruling. There is no program officer, no LOI-to-proposal pipeline, and no site visit process on record — because there is no competitive intake to progress through.

The grantee history (66 recorded grants to roughly 20 organizations, averaging $15,614 each) shows a foundation that renews the same relationships year after year rather than seeking new ones: the top three recipients alone (University of Michigan Library, Peoria Riverfront Museum, Phillips Academy Peabody Museum) account for nearly 68% of all tracked giving, each having received four to five separate grants over time. This is the strongest signal available to a prospective applicant — once an organization has a foothold, support tends to compound; without one, the odds of a cold unsolicited request being funded are close to zero.

Geography does the real work of defining eligibility here, standing in for any published focus area. Grants cluster in two places tied to the family's own footprint: Leelanau County, Michigan (Northport is the foundation's registered address, and Munson Hospital Foundation and Leelanau Conservancy both sit nearby) and Peoria, Illinois (where William P. Heidrich also keeps a business address, matching gifts to Peoria Riverfront Museum, Peoria Public Schools Foundation, and the Heartland Festival Orchestra). Secondary gifts to Greenwich Country Day School (CT) and Phillips Academy (MA) point to personal or educational alumni ties rather than a stated program area. Any realistic approach strategy starts not with a proposal but with identifying whether your organization already sits inside one of these personal networks.

The DB's grantee history captures 66 individual grants worth $1,030,500 in total, averaging $15,614 per grant, but the distribution is sharply top-heavy. The three largest recipients — University of Michigan Library ($320,000 across 4 grants), Peoria Riverfront Museum ($214,000 across 5 grants), and Phillips Academy Peabody Museum ($165,000 across 3 grants) — together total $699,000, or 67.9% of all tracked giving. Below that tier, gifts fall off quickly: Atwill Memorial Chapel ($58,000/5 grants), Munson Hospital Foundation ($40,000/4 grants), and University of Michigan Museum of Art ($35,000/4 grants) form a second tier, while a long tail of recipients (Dahlia Hill Society of Midland, Brooklyn Museum of Art, the Kaele Polyin Memorial Scholarship Fund) receive $1,000-$3,500 in occasional support.

The foundation's own most recent 990-PF-derived typical-grant-size figures (13 grants counted) show a median of $8,000, a mean of $13,077, and a range of $2,000 to $50,000 — consistent with a foundation whose "headline" institutional gifts (six figures, paid out over multiple years) sit well above its more numerous smaller, recurring commitments.

Geographically, Michigan (26 of 66 grants) and Illinois (21 of 66) dominate, together accounting for 71% of grant count, with California (8), Connecticut (5), Massachusetts (3), New York (2), and Vermont (1) rounding out the rest. By purpose code, the recipient list splits between "CHARITABLE" (museums, hospitals, arts organizations, a land conservancy) and "EDUCATIONAL" (university libraries and museums, private schools, scholarship funds), with charitable-purpose giving the larger share by dollar volume.

On the financial side, total annual giving has grown steadily: $167,742 (2011) to $221,032 (2020) to $290,591 (2023) — a 73% increase over twelve years — while total assets grew more modestly, from $2.67 million to $3.54 million (+33%) over roughly the same window. That means the effective payout rate has climbed from about 6.3% of assets in 2011 to roughly 8.2% in 2023, comfortably above the federal 5% minimum. Net investment income has been volatile, peaking at $430,031 in 2021 (bull market) before falling to $92,862 in 2023, meaning future grant capacity is meaningfully exposed to market conditions.

All five peers were selected because they sit within roughly $1,000 of Oak River's asset base ($3.5405M-$3.5424M), and the pattern is telling: four of the five have no public website at all, strongly suggesting Oak River's closed, preselected-only posture is the norm rather than the exception for foundations of this exact size and NTEE category, not an outlier worth working around. Only Milburn Foundation surfaces a live website, making it the sole peer worth a follow-up check for a genuinely open intake process. For a grant seeker, the practical takeaway is the same across this entire peer set: foundations at the ~$3.5M-asset, family-trustee tier rarely run competitive programs, and time is better spent identifying personal or institutional connections than drafting cold proposals to any of them.

No news coverage, press releases, or announcements specific to Oak River Foundation (EIN 36-4139320, Northport, MI) turned up in any of the four searches conducted for this report — expected for a foundation of this size and structure, which has never had a communications or public-facing grants function. The organization's registered website address, oakriver.org, does not belong to this foundation at all; it resolves to Oak River Presbyterian Church, an unrelated PCA congregation in Bonita Springs, Florida, roughly 1,100 miles from the foundation's Michigan address. That mismatch appears to be a data-linkage error somewhere upstream and should not be relied on for outreach.

The most current verifiable financial signal comes from ProPublica's Nonprofit Explorer, which shows the foundation's assets holding near $3.5 million and its latest filing on record reflecting roughly $243,000 in charitable distributions — broadly consistent with, if somewhat below, the $290,591 total giving figure recorded for fiscal year 2023 in this platform's own database, suggesting a modest pullback in the most recent cycle rather than a change in direction.

Leadership has been static for the entire period covered by available filings: William P. Heidrich, Peter Heidrich, William Heidrich II, and Carolyn Ziebarths have served as the foundation's only trustees since its December 1997 IRS ruling, with no reported additions, departures, or governance changes. There is no evidence of a new program area, a change in geographic focus, or a large one-time gift breaking from the established $8,000-$50,000 typical grant range. In short: this is a quiet, stable, multi-decade family philanthropy with no recent activity of note beyond its routine annual distributions to the same long-standing set of institutions.

There is effectively no application process to optimize — no portal, no LOI form, no published deadline, and no program staff to contact. The IRS-filed application_instructions field for this foundation is blank, and its own designation as "preselected_only" confirms that unsolicited requests are not the intended channel for support. Any generic advice about crafting a compelling LOI or timing a submission to a review cycle does not apply here, and pretending otherwise would waste an applicant's effort.

What the data does support: this foundation only funds organizations already connected to the Heidrich family's personal and geographic footprint. If your organization sits in Leelanau County, Michigan (Northport, Traverse City area — see Munson Hospital Foundation and Leelanau Conservancy on the grantee list) or in Peoria, Illinois (see Peoria Riverfront Museum, Peoria Public Schools Foundation, Heartland Festival Orchestra, and Elite Peoria Park District), you are inside one of the two clusters that account for the large majority of this foundation's giving. Organizations tied to the University of Michigan (library and museum of art both appear as top recipients), Phillips Academy Andover, or Greenwich Country Day School represent a secondary, alumni/personal-affiliation cluster.

The realistic path to consideration is relationship-based, not proposal-based: identify board members, major donors, or staff at your organization who may already have a personal connection to William P. Heidrich or the other trustees, and pursue a warm introduction through that channel rather than a cold letter. Because every recipient in the historical record has been renewed multiple times (the average recipient has received 3.3 separate grants), the foundation clearly favors long-term, low-friction relationships over one-time transactional gifts — so an organization that does get noticed should expect a multi-year relationship, not a single award.

The most common mistake would be treating this like a typical program-driven foundation and investing time in a formal grant proposal; nothing in the public record suggests any such document would ever be reviewed. A better use of effort is monitoring the foundation's annual Form 990-PF filings (via ProPublica Nonprofit Explorer or Guidestar) for any change in officers or newly appearing recipients, which would be the only external signal that its selection process has shifted.