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Aristo Zeilstra Foundation at a glance

· Private foundation

Aristo Zeilstra Foundation

Its FY2025 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$47k
Granted FY2025still arriving
10
Grants FY2025still arriving
7
States reached
$35k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0197% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2025.

Health$144kAnimals$23kInternational$15kEducation$7kPhilanthropy$3kArts & Culture$2kHousing & Shelter$2kHuman Services$2kOther$0
02FY2025 · 10 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k9 grants · $12k
  • $10k–50k1 grant · $35k
$1,000
Median grant
7
States reached
$243k
Total assets
Largest grants
RecipientAmount
THE MEDICAL UNIVERSITY OF SOUTH CAROLINA FOUNDATIO$35,000
CITADEL FOUNDATION$5,000
FRIENDS OF BAARK INC$1,500
WORLD VISION$1,500
VETERANS COMMUNITY PROJECT$1,000
NO ONE LEFT BEHIND INC$1,000
UNIVERSITY OF CINCINNATI FOUNDATION$1,000
FOREVERLAND FARM$500
KENTUCKY HUMANE SOCIETY$500
CENTER FOR HOLOCAUST AND HUMANITYEDUCATION$100
02The need
03

Does the money reach high-need areas?

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

show:

Its human-services grants (FY20–25, $4k) land where the poverty rate runs at 9%, against an area that typically sits at 10%. 13% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 10%NO ONE LEFT BEHIND INC: $1k → 7%UNITED HELP UKRAINE: $3k → 8%COVENANT HOUSE: $200 → 17%COVENANT HOUSE: $200 → 17%KENZIES CLOSET: $100 → 16%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

WA
WI
MI
NY
MA
OR
OH
PA
CA
CO
MO
KY
VA
MD
NC
SC
DC
GA
TX
FL
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

91%of every dollar goes to organizations it has funded before.
$174k · 17 repeat orgs$16k to everyone else

17 repeat relationships: 4 still active in FY2025, 13 since wound down; 5 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

17
34

Total granted

$174k
$13k

Median revenue growth · since first grant

+20%
+25%

Still filing today

82%
76%

New vs renewed · share of each year

In FY2025, 92% of grant dollars renewed an existing relationship; $4k went to new ones.

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

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

’20’21’22’23’24’25
AnimalsHealthHuman ServicesPhilanthropyEducationInternationalOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). 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

  • MU
    MEDICAL UNIVERSITY OF SOUTH CAROLINA FOUNDATION
    4× · 2022–2025 · $140k · revenue +34%
  • FO
    FRIENDS OF BAARK INC
    4× · 2022–2025 · $17k · revenue +99%
  • THE CITADEL FOUNDATION
    3× · 2022–2025 · $6k · revenue +20%

Funded once

  • United Help Ukraine Inc
    one grant, 2022 · $3k · revenue -81%
  • NATIONAL SCLERODERMA FOUNDATION INCgraduated
    one grant, 2020 · $1k · revenue +74%
  • OL
    OPERATION LIBERATION
    one grant, 2024 · $1k
How this is measured

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

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
Humane World for Animals International

HUMANE WORLD FOR ANIMALS INTERNATIONAL, FKA HUMANE SOCIETY INTERNATIONAL (HSI), works around the globe to promote the human-animal bond, rescue and protect dogs and cats, improve farm animal welfare, protect wildlife, promote animal-free…

Animals
2
United Coalition for Animals

Our mission is ending the euthanasia of cats and dogs in local shelters and keeping pets in their loving homes by providing professional and affordable spay/neuter and wellness services.

Animals
3
The San Francisco Society for the Prevention of Cruelty to Animals

To ensure every companion animal has access to quality medical care, compassionate shelter, and a loving home.

Animals
4
Safe Haven for Cats

The mission of safe haven for cats is to use no-kill principles and education to save cats' lives through rescue, adoption, spay/neuter services and community programs.

Animals
5
The American Society for the Prevention of Cruelty to Animals

The aspca's mission, as stated by founder henry bergh in 1866, is "to provide effective means for the prevention of cruelty to animals throughout the united states." the aspca was founded on the belief that animals are entitled to kind and…

Animals
6
Global Animal Partnership
Animals
7
Hope for China Dogs Rescue

At Hope for China Dogs, we are committed to combating the cruel and inhumane practice of the dog meat trade in China. We believe that every dog deserves to live a life free from pain and suffering, and we are dedicated to rescuing and…

Animals
8
Aerial Recovery

Aerial recovery's mission is to save lives and stop evil. through the creation and deployment of humanitarian special operators, aerial recovery brings together selected veterans, first responders, and mission-qualified civilians who,…

—
9
Lake Humane Society

Mission: to protect animals and build connections between pets and people through advocacy and education. vision: leading and guiding a humane lake county core values: compassion for pets and people. engagement through innovative programs,…

Animals
10
Humane Society Silicon Valley

At humane society silicon valley, our mission is to save lives, keep families together, and create a better future for pets and their people.(see schedule o for continuation)

Animals
11
Santa Barbara Humane Society for the Prevention of Cruelty to Animals

Santa barbara humane operates two campuses located in santa barbara and santa maria providing care for community-owned and homeless animals. both campuses offer affordable high quality veterinary care, compassionate behavior training…

Animals
12
600 Million Stray Dogs Need You Corporation

To end the #1 cause of suffering and death for dogs and cats globally, by developing food that will spay and neuter them, without surgery and end the overpopulation problem without killing.

Animals
How this is measured
The grantee most central to the portfolio’s shape is Greater Good Charities; the most unlike its peers is De Cavel Family Sids Foundation. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
04the grantee network

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

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2025, not grant rows in a single year, so this will not match the grant count on the cover. 50 of the 59 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
9
Early backer (in before they grew)
48/50
Grantees still filing
33/50
Grew since first funded

Where the money sits, by cause and then by grantee

MEDICAL UNIVERSITY OF SOUTH CAROLINA FOUNDATION: $140,000 · HealthMEDICAL UNIVERSITY OF SOUTH CAROLINA FOUNDATION+6 more: $2,350 · HealthFRIENDS OF BAARK INC: $17,000 · AnimalsFRIENDS OF B…OPERATION LIBERATION: $1,000 · AnimalsForeverland Farm: $1,000 · Animals+9 more: $2,700 · Animals+9 moreWORLD VISION INC: $10,258 · InternationalWORLD CENTRAL KITCHEN INC: $1,000 · International+3 more: $700 · InternationalTHE CITADEL FOUNDATION: $5,800 · EducationDOHN COMMUNITY HIGH SCHOOL: $638 · Education+1 more: $200 · EducationCITY GOSPEL MISSION AND AFFILIATES: $1,150 · OtherRESCUED ROLLERS: $1,000 · OtherMEDECINS SANS FRONTIERES USA INC - DOCTORS WITHOUT: $450 · Other1N5: $450 · OtherOUR RESCUE: $2,000 · OtherVETERANS COMMUNITY PROJECT: $1,000 · OtherSAMARITAN'S PURSE: $1,000 · OtherFREESTORE FOODBANK INC: $750 · Other+15 more: $2,720 · OtherUnited Way of Greater Cincinnati: $2,000 · PhilanthropyTHE UNIVERSITY OF CINCINNATI FOUNDATION: $1,000 · PhilanthropyGREATER GOOD CHARITIES: $850 · PhilanthropySoi Dog Foundation USA: $250 · PhilanthropyJewish Federation of Cincinnati: $240 · PhilanthropyUnited Help Ukraine Inc: $2,500 · Human ServicesNo One Left Behind: $1,000 · Human ServicesCOVENANT HOUSE: $400 · Human Services+1 more: $100 · Human Services
Health$142,350Animals$21,700International$11,958Education$6,638Other$10,520Philanthropy$4,340Human Services$4,000

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetMEDICAL UNIVERSITY OF SOUTH CAROLINA FOUNDATION: $140,000 over 4y, 0.0% of budgetFRIENDS OF BAARK INC: $17,000 over 4y, 4.6% of budgetWORLD VISION INC: $10,258 over 6y, 0.0% of budgetTHE CITADEL FOUNDATION: $5,800 over 3y, 0.0% of budgetUnited Help Ukraine Inc: $2,500 over 1y, 0.0% of budgetOUR RESCUE: $2,000 over 2y, 0.0% of budgetUnited Way of Greater Cincinnati: $2,000 over 2y, 0.0% of budgetCITY GOSPEL MISSION AND AFFILIATES: $1,150 over 3y, 0.0% of budgetNATIONAL SCLERODERMA FOUNDATION INC: $1,000 over 1y, 0.0% of budgetWORLD CENTRAL KITCHEN INC: $1,000 over 1y, 0.0% of budgetForeverland Farm: $1,000 over 2y, 0.1% of budgetSAMARITAN'S PURSE: $1,000 over 1y, 0.0% of budgetTHE UNIVERSITY OF CINCINNATI FOUNDATION: $1,000 over 1y, 0.0% of budgetVETERANS COMMUNITY PROJECT: $1,000 over 1y, 0.0% of budgetGREATER GOOD CHARITIES: $850 over 3y, 0.0% of budgetFREESTORE FOODBANK INC: $750 over 2y, 0.0% of budgetRomanian League in Defense of Animals: $500 over 1y, 0.0% of budgetKENTUCKY HUMANE SOCIETY - ANIMAL RESCUE: $500 over 1y, 0.0% of budgetBIG DOG RANCH RESCUE INC: $500 over 1y, 0.0% of budgetNO BABY BLISTERS: $450 over 2y, 0.0% of budgetCOVENANT HOUSE: $400 over 2y, 0.0% of budgetBLOOD CANCER UNITED INC: $350 over 2y, 0.0% of budgetCINCINNATI LAB RESCUE INC: $350 over 2y, 0.1% of budgetMercy Ships International: $350 over 2y, 0.0% of budgetAMERICAN SOCIETY FOR TECHNION ISRAEL INSTITUTE OF TECHNOLOGY INC: $250 over 1y, 0.0% of budgetSEA SHEPHERD CONSERVATION SOCIETY: $250 over 1y, 0.0% of budgetCincinnati Area Senior Services Inc: $250 over 1y, 0.0% of budgetHELPHOPELIVE INC: $250 over 1y, 0.0% of budgetSoi Dog Foundation USA: $250 over 1y, 0.0% of budgetJewish Federation of Cincinnati: $240 over 2y, 0.0% of budgetSTEPHEN SILLER TUNNEL TO TOWERS FOUNDATION: $200 over 1y, 0.0% of budgetCLARK COUNTY SPCA INC: $200 over 1y, 0.1% of budgetGuitars For Vets Inc: $200 over 1y, 0.0% of budgetSTOP SOLDIER SUICIDE INC: $200 over 1y, 0.0% of budgetReleash Atlanta Inc: $150 over 1y, 0.1% of budgetMARLEY'S MUTTS DOG RESCUE INC: $150 over 1y, 0.0% of budgetSPECIAL OLYMPICS INC: $150 over 1y, 0.0% of budgetSMILE TRAIN INC: $120 over 1y, 0.0% of budgetThe Center for Holocaust and Humanity Education: $100 over 1y, 0.0% of budgetSAVED IN AMERICA: $100 over 1y, 0.0% of budgetAMERICAN LUNG ASSOCIATION: $100 over 1y, 0.0% of budgetREBECCA BENDER INITIATIVE: $100 over 1y, 0.0% of budgetKENZIE'S CLOSET: $100 over 1y, 0.1% of budgetTHE HAMILTON COUNTY SPCA INC DBA SPCA CINCINNATI: $100 over 1y, 0.0% of budgetDE CAVEL FAMILY SIDS FOUNDATION: $100 over 1y, 0.4% of budget
Grantee by grantee: a decade per organization, before and after funding

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

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

The Greater Cincinnat…Ge Aerospace Foundati…Johnson Charitable Gi…Duke Energy FoundationFarmer Family Foundat…Elsa M Heisel Sule Ch…Chubb Charitable Foun…Gannett Foundation IncJpmorgan Chase Founda…The Pfizer Foundation…Baird Foundation IncVerizon Foundation
The Greater Cincinnati FoundationOH19.7× affinity8 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Greater Cincinnati Foundation · Ge Aerospace Foundation · Johnson Charitable Gift Fund · Duke Energy Foundation · Farmer Family Foundation · Elsa M Heisel Sule Charitable Trust 2005 · Chubb Charitable Foundation · Gannett Foundation Inc · Jpmorgan Chase Foundation · The Pfizer Foundation Inc · Baird Foundation Inc · Verizon Foundation

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization Aristo Zeilstra Foundation funds: left to right is the share of its income from government, bottom to top the share from Aristo Zeilstra Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 30%0%1%3%5%funder's share of their income ↑0%10%20%30%40%share of the org’s income from government →median 0%
  • Big Dog Ranch Rescue Inc: 0% of income from government
no gov moneyreceives it· size = income
3get no government money at all
6report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–40%
typical government reliance, FY20–25
How this is measured
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 a grant caused the public funding. Coverage is precision-first, a floor rather than 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 to 24 months.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 59 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its 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.

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

Source object · view filing

Play a game based on Aristo Zeilstra’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home