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Castaing Family Foundation at a glance

· Private foundation

Castaing Family 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.

$53k
Granted FY2025still arriving
8
Grants FY2025still arriving
5
States reached
$20k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
01100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Health$135kScience & Tech$116kArts & Culture$46kRecreation & Sports$15kYouth Development$14kHuman Services$10kPublic Safety & Disaster$6kInternational$2kOther$0
02FY2025 · 8 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k6 grants · $13k
  • $10k–50k2 grants · $40k
$5,000
Median grant
5
States reached
$413k
Total assets
Largest grants
RecipientAmount
Mayo Clinic$20,000
Michigan Science Center$20,000
Play Works$5,000
Detroit Symphony Orchestra$5,000
Friends of Public Radio AZ$1,000
American Red Cross$1,000
Detroit Inst of Arts$500
National Park Foundations$500
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 (FY17–24, $27k) land where the poverty rate runs at 11%, against an area that typically sits at 10%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%Hospice of the Valley: $25k → 11%FRIENDS OF KENYAN ORPHANS: $500 → 21%FRIENDS OF KENYAN ORPHANS: $500 → 21%FRIENDS OF KENYAN ORPHANS: $500 → 21%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

ME
MN
IL
MI
PA
CA
AZ
DC
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.

69%of every dollar goes to organizations it has funded before.
$183k · 11 repeat orgs$82k to everyone else

11 repeat relationships: 7 still active in FY2025, 4 since wound down.

How the two cohorts compare

Re-uppedFunded once

Organizations

11
13

Total granted

$183k
$82k

Median revenue growth · since first grant

+9%
+19%

Still filing today

82%
54%

New vs renewed · share of each year

In FY2025, 100% of grant dollars renewed an existing relationship; $0 went to new ones.

50%100%’17’18’19’20’21’22’24’25
RenewedFirst-time

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

’17’18’19’20’21’22’24’25
Arts & CultureYouth DevelopmentHuman ServicesHealthEducationRecreation & SportsOther
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

  • MS
    MICHIGAN SCIENCE CENTER
    7× · 2017–2025 · $110k · revenue +98%
  • CS
    Cancer Support Community Arizona
    4× · 2018–2021 · $11k · revenue +58%
  • TC
    THE CENTER FOR GRIEVING CHILDREN
    2× · 2017–2019 · $5k · revenue +26%

Funded once

  • HO
    Hospice of the Valley
    one grant, 2024 · $25k · revenue +11%
  • UO
    University of Michigangraduated
    one grant, 2018 · $12k · revenue +195%
  • FI
    FIRST IN MICHIGANgraduated
    one grant, 2017 · $10k · revenue +72%
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
University Corporate Research Park I Inc

To hold title and perform related functions in connection with a research park and innovation center in support of michigan state university research foundation.

—
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
Mymichigan Health Foundation

The corporation is organized and shall be operated exclusively for charitable, educational and scientific purposes by conducting or supporting activites exclusively for the benefit of, to perform the functions of, or to carry out the…

Health
4
Federation of State Medical Boards of the United States Inc

The fsmb serves as the voice for state medical boards, supporting them through education, assessment, research and advocacy while providing services and initiatives that promote patient safety, quality health care and regulatory best…

Health
5
Michigan Biotechnology Institute

Bridging the gap between early-stage innovation and commercial application. partnering to de-risk, develop and scale-up discoveries into commercially-viable technology packages.

Education
6
Michigan Enviromental Council

Informing and educating the public and decision makers about environmental issues.

Environment
7
Asco Association

Asco association promotes the common business interests of its members by: (1) advocating for policies that improve the quality of cancer care; (2) maintaining the highest standards of oncology medical care through programs supporting…

Community Improvement
8
Alumni Association of the University of Michigan

The Association is an independent worldwide organization that nurtures lifelong relationships with and among current and future Michigan alumni. As a committed partner of the University the Association offers programs of relevance and…

Education
9
Michigan Farmers Market Association

Mifma supports the viability of all community-driven marketplaces so that they can connect all consumers to local farms and businesses.

Food & Nutrition
10
Arc Research Institute

Our mission is to accelerate scientific progress, understand the root causes of disease, and narrow the gap between discoveries and impact on patients.

Health
11
Minnesota Medical Association

To be the leading voice of medicine to make minnesota the healthiest state and the best place to practice.

—
12
University Family Physicians Inc

Engage actively and continuously in medical research, education and training in the practice of medicine in conjunction with the department of family medicine of the indiana university school of medicine and indiana university…

—
How this is measured
The grantee most central to the portfolio’s shape is Playworks Education Energized; the most unlike its peers is Summer in the City. 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

17 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. 17 of the 25 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)
5
Early backer (in before they grew)
17/17
Grantees still filing
11/17
Grew since first funded

Where the money sits, by cause and then by grantee

MICHIGAN SCIENCE CENTER: $110,000 · EducationMICHIGAN SCIENCE CENTERMAYO CLINIC: $80,000 · HealthMAYO CLINICCancer Support Community Arizona: $11,000 · HealthCancer Support Community Arizon…Citizens United for Research in Epilepsy: $5,000 · HealthDETROIT SYMPHONY ORCHESTRA INC: $32,500 · Arts & CultureDETROIT SYMPHO…AUTOMOTIVE HALL OF FAME INC: $10,000 · Arts & CultureAUTOMOTIVE HAL…FRIENDS OF PUBLIC RADIO ARIZONA: $2,000 · Arts & Culture+1 more: $1,000 · Arts & CultureUniversity of Michigan: $12,000 · OtherUniversity of …AMERICAN RED CROSS: $6,000 · OtherAMERICAN RED C…NATIONAL ACADEMY OF ENGINEERS: $5,000 · OtherNATIONAL ACADE…CENTER FOR GRIEVING CHILDREN: $5,000 · OtherCENTER FOR GRI…UPLIFT CTR GREIVING CHILDREN: $2,500 · OtherUPLIFT CTR GRE…PLAYWORKS: $2,500 · OtherPLAYWORKSCANCER SUPPORT COMMUNITY: $2,000 · OtherTRAVIS MILLS FOUNDATION: $5,000 · OtherTRAVIS MILLS F…+4 more: $4,000 · Other+4 moreHospice of the Valley: $25,000 · Human ServicesFRIENDS OF KENYAN ORPHANS: $1,500 · Human ServicesPLAYWORKS EDUCATION ENERGIZED: $7,500 · Youth DevelopmentTHE CENTER FOR GRIEVING CHILDREN: $5,000 · Youth DevelopmentFIRST IN MICHIGAN: $10,000 · Recreation & Sports
Education$110,000Health$96,000Arts & Culture$45,500Other$44,000Human Services$26,500Youth Development$12,500Recreation & Sports$10,000

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

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetMICHIGAN SCIENCE CENTER: $110,000 over 7y, 0.5% of budgetMAYO CLINIC: $80,000 over 3y, 0.0% of budgetDETROIT SYMPHONY ORCHESTRA INC: $32,500 over 7y, 0.0% of budgetHospice of the Valley: $25,000 over 1y, 0.0% of budgetUniversity of Michigan: $12,000 over 1y, 5.6% of budgetCancer Support Community Arizona: $11,000 over 4y, 0.2% of budgetFIRST IN MICHIGAN: $10,000 over 1y, 0.5% of budgetAUTOMOTIVE HALL OF FAME INC: $10,000 over 1y, 0.9% of budgetPLAYWORKS EDUCATION ENERGIZED: $7,500 over 2y, 0.0% of budgetCitizens United for Research in Epilepsy: $5,000 over 1y, 0.1% of budgetTRAVIS MILLS FOUNDATION: $5,000 over 1y, 0.1% of budgetTHE CENTER FOR GRIEVING CHILDREN: $5,000 over 2y, 0.2% of budgetFRIENDS OF PUBLIC RADIO ARIZONA: $2,000 over 2y, 0.0% of budgetFRIENDS OF KENYAN ORPHANS: $1,500 over 3y, 0.1% of budgetNATIONAL PARK FOUNDATION: $1,000 over 2y, 0.0% of budgetTHE DETROIT INSTITUTE OF ARTS: $1,000 over 2y, 0.0% of budgetSUMMER IN THE CITY: $1,000 over 1y, 0.8% 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.

American Online Givin…Donor Advised Charita…Fidelity Investments …Amazonsmile Foundation
American Online Giving Foundation IncDE9.8× affinity7 shared granteesties to 3 of 3Hover any node to trace its alignments.Compare side by side →

Open a dossier: American Online Giving Foundation Inc · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile 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 Castaing Family Foundation funds: left to right is the share of its income from government, bottom to top the share from Castaing Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%0%1%3%5%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →
    no gov moneyreceives it· size = income
    0get no government money at all
    7report 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, 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 25 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 Castaing Family’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