· Private foundation
ANTONIA FOUNDATION INCco F MICHAEL ARNOW
Its FY2025 filing reports that it accepted unsolicited grant applications.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- $10k–50k8 grants · $176k
- $50k–250k5 grants · $500k
| Recipient | Amount |
|---|---|
| URBAN ECOLOGY CENTER | $175,000 |
| MILWAUKEE PUBLIC MUSEUM | $110,000 |
| MEQUON NATURE PRESERVE | $85,000 |
| INTERNATIONAL CRANE FOUNDATION | $80,000 |
| HUNGER TASK FORCE | $50,000 |
| ZOOLOGICAL SOCIETY OF MILW | $49,290 |
| VIVENT HEALTH | $46,333 |
| WISCONSIN HUMANE SOCIETY | $25,000 |
| NEIGHBORHOOD HOUSE OF MILWAUKEE | $15,000 |
| THE ALDO LEOPOLD NATURE CENTER | $10,000 |
| RIVEREDGE NATURE CENTER | $10,000 |
| BOERNER BOTANICAL GARDENS | $10,000 |
| HOO'S WOODS RAPTOR CENTER | $10,000 |
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.
Your human-services grants (FY20–25, $110k) land where the poverty rate runs at 17%, against an area that typically sits at 10%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.
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.
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.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +24% since the first grant, against -3% for the ones you funded once.
19 repeat relationships — 13 still active in FY2025, 6 since wound down.
How the two cohorts compare
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2025, 100% of grant dollars renewed an existing relationship; $0 went to new ones.
Where new relationships form · theme of each grantee’s first grant
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
URBAN ECOLOGY CENTER INC9× · 2017–2025 · $710k · revenue +113%
INTERNATIONAL CRANE FOUNDATION INC9× · 2017–2025 · $571k · revenue +2%
WISCONSIN HUMANE SOCIETY9× · 2017–2025 · $170k · revenue +61%
Funded once
- FAFEEDING AMERICAN EASTERN WIone grant, 2023 · $30k
GATHERING OF SOUTHEAST WI INCone grant, 2023 · $20k · revenue +22%- AAARTS AT LARGE INCone grant, 2017 · $10k · revenue -27%
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
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.
Protect and restore Wisconsin's natural heritage and ecology through active leadership, education and stewardship
To protect wisconsin's lands, waters, and wildlife by providing funding, leading partnerships, and connecting all people with nature.
Our mission is to protect water quality and wildlife habitat in the river corridors and to advocate for sound land use in the Milwaukee, Menomonee, and Kinnickinnic River Watersheds.
Lincoln park zoo is dedicated to connecting people with nature by providing a free, family-oriented wildlife experience in the heart of chicago and by advancing the highest quality of animal care, horticulture, education, science and…
Engage our community in supporting milwaukee county parks to collectively steward a thriving park system.
WMNC will continue constructing the new Milwaukee Public Museum facility to completion and will then continue as the owner and operator of the new museum.
To provide support & funding for the mission of the zoological society of milwaukee & the milwaukee county zoo.
To preserve, promote, protect, and enhance wisconsin state parks, forests, trails, and recreation areas.
The mission of mississippi valley conservancy is to conserve native habitats and farmlands in the driftless area for the health and well-being of current and future generations.
The wisconsin wildlife federation has a dual mission to engage in conservation education and to advocate for sound conservation policy.
Landmark conservancy is a nationally accredited, nonprofit conservation organization serving 20 counties across northwest wisconsin. their mission is to conserve wisconsin's natural legacy for everyone...forever.
Obtain and manage land of ecological significance.
For reference, the grantee most central to the portfolio’s shape is Milwaukee Public Museum Inc and the most unlike its peers is Hoos Woods Raptor Center. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
Your grantees are a median of 34 years old; the field is 20. You back the established end — and your money leans older still.
The field is 18% startups (under 5 years old) — 0% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 10% of the field you don’t fund.
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.
21 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 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 21 of the 26 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.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
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.
- Who funds URBAN ECOLOGY CENTER INC ↗
- Who funds INTERNATIONAL CRANE FOUNDATION INC ↗
- Who funds Mequon Nature Preserve Inc ↗
- Who funds ZOOLOGICAL SOCIETY OF MILWAUKEE CTY ↗
- Who funds WISCONSIN HUMANE SOCIETY ↗
- Who funds HUNGER TASK FORCE INC ↗
- Who funds MILWAUKEE PUBLIC MUSEUM INC ↗
- Who funds VIVENT HEALTH INC ↗
- Who funds RIVER REVITALIZATION FOUNDATION INC ↗
- Who funds NEIGHBORHOOD HOUSE OF MILWAUKEE INC ↗
- Who funds FELLOW MORTALS INC ↗
- Who funds ALDO LEOPOLD NATURE CENTER INC ↗
- Who funds HOOS WOODS RAPTOR CENTER ↗
- Who funds RIVEREDGE NATURE CENTER INC ↗
- Who funds GATHERING OF SOUTHEAST WI INC ↗
- Who funds DRIFTLESS AREA LAND CONSERVANCY INC ↗
- Who funds ARTS AT LARGE INC ↗
- Who funds FRIENDS OF SCHLITZ AUDUBON NATURE CENTER INC ↗
- Who funds MILWAUKEE COUNTY HISTORICAL SOCIETY INC ↗
- Who funds FRIENDS OF LAKESHORE STATE PARK ↗
- Who funds MADISON CHILDREN'S MUSEUM INC ↗
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.
Open a dossier: Herbert H Kohl Charities Inc · Green Bay Packers Foundation · Greater Milwaukee Foundation Inc · Dorothy Inbusch Foundation Inc · Baird Foundation Inc · John C Bock Foundation · James E Dutton Foundation Inc · The Brookby Foundation · Ralph Evinrude Foundation Inc · National Fish and Wildlife Foundation · Jpmorgan Chase Foundation · Dudley and Constance Godfrey Foundation Inc
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 ANTONIA FOUNDATION INCco F MICHAEL ARNOW 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.
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.
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Find your warmest path to ANTONIA FOUNDATION INCco F MICHAEL ARNOW through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.
Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.