Skip to content
Marguerite Sours Foundation at a glance

· Private foundation

Marguerite Sours 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.

$115k
Granted FY2025still arriving
30
Grants FY2025still arriving
9
States reached
$10k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0183% classified

What it funded, over time

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

Education$330kAnimals$135kPhilanthropy$108kHealth$82kArts & Culture$69kReligion$67kYouth Development$48kHuman Services$44kOther$0
02FY2025 · 30 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k27 grants · $85k
  • $10k–50k3 grants · $30k
$3,000
Median grant
9
States reached
$2.8M
Total assets
Largest grants
RecipientAmount
MERCY HEALTH FOUNDATION$10,000
MISSION HAUS FOUNDATION$10,000
RAMPART VIGILANCE FOUNDATION$10,000
HANGRY DONKEY SANCTUARY$6,500
MUSIC IN THE MOUNTAINS$6,000
ST COLUMBIA SCHOOL$5,000
SOUTHWEST WILDLIFE CONSERVATION CENTER$5,000
POLAR BEARS INTERNATIONAL$5,000
ST MARY'S UNIVERSITY SCHOOL OF LAW$5,000
CENTRAL CATHOLIC HIGH SCHOOL SCHOLARSHIP$5,000
FUREVER SUNNY ANIMAL RESCUE$5,000
HUTCHINSON COMMUNITY COLLEGE$5,000
STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION$5,000
GUIDE DOGS OF TEXAS$4,000
BIG BROTHERS BIG SISTERS OF SOUTHWEST COLORADO$3,000
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 (FY17–25, $41k) land where the poverty rate runs at 16%, 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%CHILDHELP: $2k → 11%GUIDE DOGS OF TEXAS: $3k → 16%GUIDE DOGS OF TEXAS: $2k → 16%GUIDE DOGS OF TEXAS: $2k → 16%GUIDE DOGS OF TEXAS: $2k → 16%GUIDE DOGS OF TEXAS: $2k → 16%CAMP ARANZAZU: $5k → 17%CAMP ARANZAZU: $5k → 17%GUIDE DOGS OF TEXAS: $4k → 16%CAMP ARANZAZU: $3k → 17%GUIDE DOGS OF TEXAS: $2k → 16%GUIDE DOGS OF TEXAS: $2k → 16%ROCKPORT FULTON GOOD SMARITIANS: $3k → 17%GUIDE DOGS OF TEXAS: $2k → 16%COASTAL BEND TROOP SUPPORT: $2k → 17%COASTAL BEND TROOP SUPPORT: $2k → 17%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

MT
ND
IL
NY
OR
OH
CA
CO
MO
AZ
KS
TX
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.

81%of every dollar goes to organizations it has funded before.
$904k · 54 repeat orgs$211k to everyone else

Grantees it renews have grown median revenue +52% since the first grant, against +38% for those funded once.

54 repeat relationships: 20 still active in FY2025, 34 since wound down; 10 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

54
40

Total granted

$904k
$168k

Median revenue growth · since first grant

+52%
+38%

Still filing today

33%
20%

New vs renewed · share of each year

In FY2025, 62% of grant dollars renewed an existing relationship; $44k went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

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

’17’18’19’20’21’22’23’24’25
AnimalsHuman ServicesArts & CultureHousing & ShelterRecreation & SportsPhilanthropyOther
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

  • MI
    MUSIC IN THE MOUNTAINS
    9× · 2017–2025 · $42k · revenue +60%
  • SM
    St Mary's University
    3× · 2021–2025 · $25k · revenue +24%
  • GD
    Guide Dogs of Texas Inc
    9× · 2017–2025 · $21k · revenue +304%

Funded once

  • IG
    Individual grant recipient
    one grant, 2017 · $25k
  • TW
    THE WINNIPEG FOUNDATION
    one grant, 2021 · $20k
  • OA
    ODYSSEY AFTER SCHOOL ENRICHMENT
    one grant, 2019 · $13k
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 Society of Southern Arizona

To compassionately serve pets and the people who love them.

Animals
2
Animal Friends of Port Aransas Inc

Provide veterinary and shelter services for displaced and wayward animals in the township and outlying area of port aransas, texas.

Animals
3
Ark-Valley Humane Society Inc

Ark-Valley Humane Society's (AVHS) Mission is ensuring the welfare of companion animals through compassion and care. AVHS operated an open-admission animal shelter for Chaffee County, Colorado.

Animals
4
Angies Dog House

We are dedicated to rescuig animals left homeless for whatever reason, animals in public shelters where they are at high risk of euthanasia, animals given up by their owners because of difficult circumstances, and those in danger of abuse…

Animals
5
Raskels Rescue
Animals
6
Animal Rescue of the Rockies

Animal Care and Adoption - ARR's mission is to save the lives of homeless and abandoned dogs and cats. Our goal is reaching a no-kill society in the United States.

Animals
7
Humane Society of Yuma

To reduce the number of homeless pets through adoption, rescue and spay and neuter programs.

Animals
8
North Texas Australian Shepherd Rescue

NTASR helps rescue and rehabilitate Australian Shepherds, Border Collies, and mixes of the two.Thus far, several other breeds have made their way through the rescue including a doodle, a dachshund, a frenchie, and a shar pei. NTASR takes…

Animals
9
Love Them All

We specialize in saving the most at-risk and critical needs dogs facing unnecessary euthanasia in our local shelters. We provide every resource they need to ultimately become adoptable to their perfect forever home.

Animals
10
Humane Society of San Antonio (Audit)

To protect and improve the lives of dogs and cats by providing shelter, care, adoption, rescue, spay & neuter programs and community education.

Animals
11
Humane Society of Vero Beach and Indian River County Inc

None

Animals
12
Sunnyside Street Dogs I

Community dog rescue focused on saving and rehoming street dogs in Houston.

Animals
How this is measured
The grantee most central to the portfolio’s shape is Arizona Humane Society; the most unlike its peers is Furever Sunny. 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

29 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. 29 of the 104 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)
13
Early backer (in before they grew)
28/29
Grantees still filing
23/29
Grew since first funded

Where the money sits, by cause and then by grantee

MERCY HEALTH FOUNDATION: $66,000 · OtherMERCY HEALTH FOUNDATIONST MARYS SCHOOL OF LAW: $60,000 · OtherST MARYS SCHOOL OF LAWHUTCHINSON COMMUNITY COLLEGE: $60,000 · OtherHUTCHINSON COMMUNITY COLLEGEST COLUMBIA SCHOOL: $58,000 · OtherST COLUMBIA SCHOOLSACRED HEART SCHOOL: $56,000 · OtherSACRED HEART SCHOOLCENTRAL CATHOLIC HIGH SCHOOL: $45,000 · OtherWINNIPEG USA FOUNDATION: $40,000 · OtherWINNIPEG FOUNDATION USA: $37,000 · OtherST PIUS X: $30,000 · Other+72 more: $428,270 · Other+72 moreHUMANE SOCIETY OF ARANSAS COUNTY: $42,500 · AnimalsHUMANE SOC…POLAR BEARS INTERNATIONAL: $15,000 · AnimalsPOLAR BEAR…THE HANGRY DONKEY SANCTUARY INC: $9,930 · AnimalsTHE HANGRY…Furever Sunny: $8,500 · AnimalsFurever Su…SOUTHWEST WILDLIFE CONSERVATION CENTER: $8,000 · AnimalsSOUTHWEST …ANOTHER CHANCE RFT: $6,500 · AnimalsANOTHER CH…HUMANE SOCIETY OF THE WT MTNS: $4,500 · AnimalsPERFORMING ANIMAL WELFARE SOCIETY: $4,000 · Animals+3 more: $9,000 · Animals+3 moreMUSIC IN THE MOUNTAINS: $42,000 · Arts & CultureDURANGO ARTS CENTER INC: $16,000 · Arts & CultureROCKPORT LITTLE THEATER: $2,500 · Arts & CultureRockport Art Association Inc: $2,500 · Arts & CultureGuide Dogs of Texas Inc: $20,500 · Human ServicesCamp Aranzazu Inc: $12,500 · Human ServicesCOASTAL BEND TROOP SUPPORT INC: $6,500 · Human ServicesROCKPORT-FULTON GOOD SAMARINC: $2,500 · Human ServicesCHILDHELP INC: $1,500 · Human ServicesFISHER HOUSE INC: $10,000 · Housing & ShelterTHE CHARRO FOUNDATION: $6,000 · PhilanthropySTEPHEN SILLER TUNNEL TO TOWERS FOUNDATION: $5,000 · Education
Other$880,270Animals$107,930Arts & Culture$63,000Human Services$43,500Housing & Shelter$10,000Philanthropy$6,000Education$5,000

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 budgetHUMANE SOCIETY OF ARANSAS COUNTY: $42,500 over 7y, 2.7% of budgetMUSIC IN THE MOUNTAINS: $42,000 over 9y, 0.9% of budgetSt Mary's University: $25,000 over 3y, 0.0% of budgetGuide Dogs of Texas Inc: $20,500 over 9y, 0.3% of budgetDURANGO ARTS CENTER INC: $16,000 over 9y, 0.7% of budgetPOLAR BEARS INTERNATIONAL: $15,000 over 3y, 0.1% of budgetCamp Aranzazu Inc: $12,500 over 3y, 0.3% of budgetFISHER HOUSE INC: $10,000 over 4y, 0.4% of budgetTHE HANGRY DONKEY SANCTUARY INC: $9,930 over 2y, 4.2% of budgetFurever Sunny: $8,500 over 2y, 18% of budgetSOUTHWEST WILDLIFE CONSERVATION CENTER: $8,000 over 2y, 0.2% of budgetANOTHER CHANCE RFT: $6,500 over 2y, 4.5% of budgetFULTON VOLUNTEER FIRE DEPARTMENT INC: $6,000 over 6y, 0.3% of budgetTHE CHARRO FOUNDATION: $6,000 over 3y, 0.2% of budgetRockport Volunteer Fire Department Inc: $5,000 over 5y, 0.3% of budgetHUMANE SOCIETY OF THE WT MTNS: $4,500 over 2y, 0.4% of budgetPERFORMING ANIMAL WELFARE SOCIETY: $4,000 over 2y, 0.1% of budgetADAPTIVE SPORTS FOUNDATION INC: $4,000 over 2y, 0.1% of budgetYOUNG LIFE: $3,500 over 1y, 0.0% of budgetSOUTHWEST OASIS LABRADOR RESCUE INC: $3,000 over 1y, 1.2% of budgetArizona Humane Society: $3,000 over 1y, 0.0% of budgetTHE ARIZONA ANIMAL WELFARE LEAGUE: $3,000 over 1y, 0.1% of budgetROCKPORT-FULTON GOOD SAMARINC: $2,500 over 1y, 0.9% of budgetRockport Art Association Inc: $2,500 over 1y, 0.1% of budgetCHILDHELP INC: $1,500 over 1y, 0.0% 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.

  • Who funds HUMANE SOCIETY OF ARANSAS COUNTY ↗
  • Who funds MUSIC IN THE MOUNTAINS ↗
  • Who funds St Mary's University ↗
  • Who funds Guide Dogs of Texas Inc ↗
  • Who funds DURANGO ARTS CENTER INC ↗
  • Who funds POLAR BEARS INTERNATIONAL ↗
  • Who funds Camp Aranzazu Inc ↗
  • Who funds FISHER HOUSE INC ↗
  • Who funds THE HANGRY DONKEY SANCTUARY INC ↗
  • Who funds Furever Sunny ↗
  • Who funds SOUTHWEST WILDLIFE CONSERVATION CENTER ↗

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.

Ed Rachal FoundationMargaret Sue Rust Fou…Barrow FoundationCoastal Bend Communit…Dallas Jewish Communi…Steps Foundation fka …Greater Houston Commu…Shell USA Company Fou…Baird Foundation IncJpmorgan Chase Founda…The Pfizer Foundation…Morgan Stanley Global…
Ed Rachal FoundationTX19.7× affinity7 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Ed Rachal Foundation · Margaret Sue Rust Foundation · Barrow Foundation · Coastal Bend Community Foundation · Dallas Jewish Community Foundation · Steps Foundation fka The Powers Private Foundation · Greater Houston Community Foundation · Shell USA Company Foundation · Baird Foundation Inc · Jpmorgan Chase Foundation · The Pfizer Foundation Inc · Morgan Stanley Global Impact Funding Trust Inc

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 Marguerite Sours Foundation funds: left to right is the share of its income from government, bottom to top the share from Marguerite Sours Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%1%5%11%20%funder's share of their income ↑0%1%3%4%5%share of the org’s income from government →
    no gov moneyreceives it· size = income
    0get no government money at all
    9report government grants on their 990 we could not trace to a source (not plotted)
    0rely on government for over half their income
    ⤢ axis zoomed · 0–5%
    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 104 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 Marguerite Sours’ 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