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Plinth

· Private foundation

F Ross Birkhill and Laura Jean Birkhill

Its FY2025 filing reports that it accepted unsolicited grant applications.

$68k
Granted FY2025still arriving
16
Grants FY2025still arriving
4
States reached
$13k
Largest
01What you fund
0198% classified

What you funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year — across FY20182025.

Arts & Culture$139kHuman Services$128kEducation$67kHealth$46kAnimals$27kFood & Nutrition$26kHousing & Shelter$17kPublic Benefit$11kOther$0
02FY2025 · 16 grants

Where the money goes

Your grants by size, and where they go.

By grant size · FY2025

  • Under $10k14 grants · $44k
  • $10k–50k2 grants · $24k
$3,000
Median grant
4
States reached
$1.1M
Total assets
Largest grants
RecipientAmount
WAYNE STATE UNIVERSITY$13,310
THE SALVATION ARMY$10,500
GLEANERS COMMUNITY FOOD BANK INC$7,500
THE HENRY FORD$5,500
HOUSE N2 HOME$4,500
HUMANE SOCIETY OF HURON VALLEY$4,500
STEPHEN SILLER TUNNEL TO TOWERS$4,015
A2ETHICS ORG$3,000
THE UNIVERSITY OF MICHIGAN$2,500
EDCHOICE$2,500
HOSPICE OF MICHIGAN INC$2,500
WOUNDED WARRIOR PROJECT$2,000
FISHER HOUSE MICHIGAN$2,000
COVENANT HOUSE MICHIGAN$2,000
PRESERVE HISTORIC SLEEPING BEAR$750
02The need
03

Do your dollars go where the need is?

Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.

show:

Your human-services grants (FY18–25, $24k) land where the poverty rate runs at 16%, against an area that typically sits at 11%. 71% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.

area typical 11%WOUNDED WARRIOR PROJECT: $2k → 14%BLUE STAR SERVICE DOGS INC: $2k → 5%COVENANT HOUSE MICHIGAN: $2k → 21%WOUNDED WARRIOR PROJECT: $2k → 14%COVENANT HOUSE MICHIGAN: $2k → 21%WOUNDED WARRIOR PROJECT: $2k → 14%LEADER DOGS FOR THE BLIND: $3k → 8%LEADER DOGS FOR THE BLIND: $2k → 8%HOSPICE OF MICHIGAN INC: $3k → 21%LEADER DOGS FOR THE BLIND: $1k → 8%HOSPICE OF MICHIGAN INC: $2k → 21%HOSPICE OF MICHIGAN INC: $1k → 21%HOSPICE OF MICHIGAN INC: $1k → 21%HOSPICE OF MICHIGAN INC: $1k → 21%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount

Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.

US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.

03Your edge
repeat funding

Who you back again

Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.

93%of every dollar goes to organizations you’ve funded before.
$442k · 23 repeat orgs$34k to everyone else

And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +37% since the first grant, against +29% for the ones you funded once.

23 repeat relationships — 14 still active in FY2025, 9 since wound down; 2 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

23
9

Total granted

$442k
$29k

Median revenue growth · since first grant

+37%
+29%

Still filing today

78%
67%

New vs renewed · share of each year

In FY2025, 92% of grant dollars renewed an existing relationship; $5k went to new ones.

50%100%’18’20’21’22’23’24’25
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’18’20’21’22’23’24’25
Human ServicesHousing & ShelterFood & NutritionArts & CulturePublic BenefitEducationOther

First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). The earliest year is left-censored: relationships that predate the data read as “new.” Theme is the grantee’s IRS cause.

Backed again, and grew

  • TC
    THE CORNING MUSEUM OF GLASS
    6× · 2018–2024 · $87k · revenue +30%
  • HS
    HUMANE SOCIETY OF HURON VALLEY
    7× · 2018–2025 · $23k · revenue +54%
  • UO
    University of Michigan
    3× · 2018–2025 · $19k · revenue +195%

Funded once

  • DA
    Dexter Area Museum Incgraduated
    one grant, 2018 · $7k · revenue +130%
  • AP
    ARNOLD PALMER MEDICAL CENTER
    one grant, 2018 · $5k
  • FF
    FRANKLIN FURANCE ARCHIVE INC
    one grant, 2018 · $3k

Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.

04Your field

The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.

1
Michigan Humane Society

To improve and save lives through compassionate care, community engagement and advocacy for animals.

Animals
2
Detroit Historical Society

The Detroit Historical Society tells Detroit's stories and why they matter through its exhibits, programs, outreach, and the preservation and dissemination of its artifacts and collections.

Arts & Culture
3
The Greater Detroit Health Transition Company

Gdahc mission: together with our partners, we empower and improve the health and economic vitality of individuals, organizations and communities by catalyzing the power of collaboration. gdahc vision: healthy people. healthy community.…

4
Business Leaders for Michigan

Business leaders for michigan is a nonprofit, nonpartisan statewide organization driven by ceos from the state's leading employers, all working toward a shared goal: making michigan a top 10 state for jobs, talent and a thriving economy.…

5
Henry Ford Macomb Hospital Corporation

Henry ford health macomb hospital (hfmh) is an affiliate of henry ford health system dba henry ford health ("hf health") serving the northeastern metropolitan detroit michigan communities. as an integrated component of one of the nation's…

Health
6
Business Leaders for Michigan Foundation

Business leaders for michigan is a nonprofit, nonpartisan statewide organization driven by ceos from the state's leading employers, all working toward a shared goal: making michigan a top 10 state for jobs, talent and a thriving economy.…

Community Improvement
7
Detroit Regional Chamber

The chamber is the voice for business and works to power the economy for southeast michigan through public policy, advocacy and leading regional economic development and talent initiatives.

8
Arbor Hospice Inc

To meet our patients and families where they are with urgency, purpose, and compassionate accountability surrounding them with decades of dedicated hospice expertise.

Human Services
9
Trinity Health - Michigan

We, trinity health-michigan and trinity health, serve together in the spirit of the gospel as a compassionate and transforming healing presence within our communities. trinity health-michigan is a member of trinity health.

Health
10
Michigan Farm Bureau

Michigan farm bureau (mfb) is a member directed agricultural organization whose purpose is to represent, protect, and enhance the business, economic, social, and educational interests of our members located throughout the state of michigan.

11
Arc of Wabash County Inc

The mission of arc of wabash county, inc. is to challenge, empower, and support individuals with disabilities to reach their highest level of independence. arc of wabash is dedicated to: 1) preserve, protect, and promote the dignity of…

Human Services
12
Friends for Animals of Metro Detroit

The friends are dedicated to the rescue, protection, and adoption of companion animals in need while inspiring the human-animal bond. we meet our mission by:-saving 100% of healthy and treatable animals.-providing high-quality animal care…

Animals

For reference, the grantee most central to the portfolio’s shape is Fisher House Michigan and the most unlike its peers is Dexter Area Museum Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.

For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.

← shrinkinggrowing →↓ leaning in → pulling backsteadyFood Pantries & AssistanceVeteran Support ServicesAffordable Housing Developm…Child and Family ServicesHospice Care ServicesCommunity Arts OrganizationsLand Conservation Organizat…Animal Rescue and AdoptionElementary Literacy TutoringGovernment Accountability R…Homeless Services & ShelterCommunity Health Centers
the sector your giving your giving is ahead of the sector the sector’s ahead of you· dot size = how much the theme matters to each side
Ordered by the change in your giving — leaning in on top, pulling back at the bottom. The bar between the two dots is how out of step you are with the sector. Hover any row for detail.

Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.

Your grantees are a median of 36 years old; the field is 17. You back the established end — and your money leans older still.

THE FIELDby orgYOUR GRANTEESby number20%0%<5yr13%4%5–10yr20%17%10–20yr15%25%20–35yr14%33%35–55yr18%21%55yr+
THE FIELDby orgYOUR MONEYby value20%0%<5yr13%1%5–10yr20%3%10–20yr15%8%20–35yr14%26%35–55yr18%62%55yr+

The field is 20% startups (under 5 years old) — 0% of your grantees by number, and just 0% of your money.

Closures · last 5 years

The orgs you fund almost never close 3% lost their exemption, against 12% of the field you don’t fund.

orgs you fund
3%1/29
the rest of the field
12%
6,510/53,827

Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.

04the grantee network

27 grantees tracked through their own filings, 2017–2025.

Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.

Counted here: distinct organizations you funded across 20172025, not grant rows in a single year — so this will not match the grant count on the cover. 27 of the 34 grantees resolved in that span have returns of their own we could reconcile; the rest are funded organizations whose filings we could not track year by year.

0
Load-bearing (≥25% of a budget)
6
Early backer (in before they grew)
26/27
Grantees still filing
20/27
Grew since you first funded

Where your money sits — by cause, then by grantee

SALVATION ARMY — $109,832 · OtherSALVATION ARMYTHE CORNING MUSEUM OF GLASS — $87,042 · OtherTHE CORNING MUSEUM OF GLASSWAYNE STATE UNIVERSITY — $44,310 · OtherWAYNE STATE UNIVERSITYUniversity of Michigan — $18,500 · OtherANN ARBOR FILM FESTIVAL — $14,032 · OtherTHE HENRY FORD — $13,500 · Other+15 more — $67,250 · Other+15 moreGLEANERS COMMUNITY FOOD BANK OF SOUTHEASTERN MICHIGAN — $16,338 · Food & NutritionFORGOTTEN HARVEST INC — $9,695 · Food & NutritionHospice of Michigan Inc — $7,895 · Human ServicesLEADER DOGS FOR THE BLIND — $5,518 · Human ServicesWOUNDED WARRIOR PROJECT INC — $5,500 · Human ServicesCOVENANT HOUSE MICHIGAN — $4,000 · Human ServicesBLUE STAR SERVICE DOGS INC — $1,500 · Human ServicesHUMANE SOCIETY OF HURON VALLEY — $23,456 · AnimalsEdChoice Inc — $10,500 · EducationSTEPHEN SILLER TUNNEL TO TOWERS FOUNDATION — $6,015 · EducationTHE PURPLE ROSE THEATRE COMPANY — $13,415 · Arts & CultureNATIONAL PUBLIC RADIO INC — $2,000 · Arts & CultureOrlando Health Foundation Inc — $15,000 · Health
Other$354,466Food & Nutrition$26,033Human Services$24,413Animals$23,456Education$16,515Arts & Culture$15,415Health$15,000

Each org by its size and your share of it — top-left is where you’re load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ your share of their budgetTHE CORNING MUSEUM OF GLASS — $87,042 over 6y, 0.1% of budgetHUMANE SOCIETY OF HURON VALLEY — $23,456 over 7y, 0.0% of budgetUniversity of Michigan — $18,500 over 3y, 5.1% of budgetGLEANERS COMMUNITY FOOD BANK OF SOUTHEASTERN MICHIGAN — $16,338 over 4y, 0.0% of budgetOrlando Health Foundation Inc — $15,000 over 3y, 0.0% of budgetANN ARBOR FILM FESTIVAL — $14,032 over 6y, 13% of budgetTHE PURPLE ROSE THEATRE COMPANY — $13,415 over 3y, 0.4% of budgetEdChoice Inc — $10,500 over 5y, 0.0% of budgetFORGOTTEN HARVEST INC — $9,695 over 3y, 0.0% of budgetHospice of Michigan Inc — $7,895 over 5y, 0.0% of budgetFISHER HOUSE MICHIGAN — $7,500 over 3y, 0.3% of budgetDexter Area Museum Inc — $6,500 over 1y, 3.9% of budgetOAKLAND LITERACY COUNCIL — $6,500 over 3y, 0.6% of budgetSTEPHEN SILLER TUNNEL TO TOWERS FOUNDATION — $6,015 over 2y, 0.0% of budgetLEADER DOGS FOR THE BLIND — $5,518 over 3y, 0.0% of budgetWOUNDED WARRIOR PROJECT INC — $5,500 over 3y, 0.0% of budgetSHELTER ASSOCIATION OF WASHTENAW COUNTY — $5,000 over 2y, 0.1% of budgetHOUSE N2 HOME INC — $4,500 over 1y, 0.5% of budgetCOVENANT HOUSE MICHIGAN — $4,000 over 2y, 0.0% of budgetARNOLD & WINNIE PALMER FOUNDATION INC — $4,000 over 2y, 0.1% of budgetTEAM RED WHITE & BLUE INC — $3,000 over 1y, 0.1% of budgetAVALON NONPROFIT HOUSING CORPORATION — $3,000 over 1y, 0.1% of budgetWarrior Dog Foundation — $2,500 over 1y, 0.3% of budgetNATIONAL PUBLIC RADIO INC — $2,000 over 1y, 0.0% of budgetYOUTH JUSTICE FUND — $2,000 over 1y, 0.9% of budgetBLUE STAR SERVICE DOGS INC — $1,500 over 1y, 0.4% of budgetSleeping Bear Forever DBA Preserve Historic Sleeping Bear — $750 over 1y, 0.3% of budget
Go grantee by grantee — a decade per org, and how each moved after you funded them

A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.

The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.

Community Foundation for Southeast MichiganMI19.1× affinity7 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Community Foundation for Southeast Michigan · Ann Arbor Area Community Foundation · United Way of Washtenaw County · Dte Energy Foundation · Baird Foundation Inc · Raymond James Charitable Endowment Fund · The Pfizer Foundation Inc · The Blackbaud Giving Fund · Charities Aid Foundation America · American Online Giving Foundation Inc · Network for Good · Paypal Charitable Giving Fund

Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.

Government reliance of your grantees

Every dot is one organization F Ross Birkhill and Laura Jean Birkhill funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal or a single department — and drag the year to watch it move.

2024
202122232425
no gov · 10%1%4%8%15%your share of their income ↑0%25%50%75%100%share of the org’s income from governmentmedian 0%
  • Wounded Warrior Project Inc0% of income from government
no gov moneyreceives it· size = income
1get no government money at all
5report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
typical government reliance, FY2025

Government income is each org’s traced federal awards (USASpending — grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that your grant caused the public funding. Coverage is precision-first — a floor, not a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12–24 months.

On method. Every financial figure here is read directly from IRS e-file XML — your own 990/990-PF and the multi-year returns of the 34 grantees we resolved across every year we hold, several hundred filings in all (a different count from the grant rows on the cover, which are one fiscal year)— each linked to its source. Grantee achievements and outcomes are each organization’s own program-service reporting (Form 990, Part III); we read these as association with sustained funding — the foundation is one of several forces — suppress low-confidence name matches rather than guess, and say so where a figure rests on a single grant or filing. Not everything on this page is a filed figure, and the difference matters. Filed is what you reported on your return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears. How we build these →

Generated from your IRS Form 990-PF e-file return for fiscal year 2025, released 2025. Filings run roughly 12–24 months behind; figures are dated accordingly.

Source object · view filing

More from the funding graph