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Arizona · 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 FY2025(still arriving)
30
Grants FY2025
29
Organizations funded FY2024
31%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$3,000
Largest grant, FY2025
$10,000
Organizations funded a year
23 to 32
FY2018 to FY2024
States reached, FY2025
9
Total assets, FY2025
$2.8M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 31% of the organizations Marguerite Sours Foundation funded were first-time grantees, receiving 22% of its grant dollars.

New vs renewed · share of each year

In FY2024, 78% of grant dollars renewed an existing relationship; $23k went to new ones.

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

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

’18’19’20’21’22’23’24
AnimalsHuman ServicesArts & CulturePhilanthropyPublic Safety & DisasterYouth DevelopmentOther
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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2025still arriving30$115k33%
FY202429$105k31%
FY202330$92k40%
FY202230$152k37%
FY202128$141k50%
FY202023$128k9%
FY201926$126k46%
FY201832$113k41%
83% 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

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

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

Top grantees

Largest recipients by total granted, FY2017 to FY2025, and the share of each one’s budget the grants supplied at peak.

GranteeTotal grantedYearsShare of their budget
Sacred Heart School$56,0005n/a
Central Catholic High School$45,0006n/a
Humane Society of Aransas County$42,50073%
Music in the Mountains$42,00091%
St Mary's University$25,00030%
Guide Dogs of Texas Inc$20,50090%
Durango Arts Center Inc$16,00091%
Polar Bears International$15,00030%
Assumption Abbey Inc$13,0006n/a
Camp Aranzazu Inc$12,50030%
Show all 36 grantees
All grantees of Marguerite Sours Foundation by total granted
GranteeTotal grantedYearsShare of their budget
Sacred Heart School$56,0005n/a
Central Catholic High School$45,0006n/a
Humane Society of Aransas County$42,50073%
Music in the Mountains$42,00091%
St Mary's University$25,00030%
Guide Dogs of Texas Inc$20,50090%
Durango Arts Center Inc$16,00091%
Polar Bears International$15,00030%
Assumption Abbey Inc$13,0006n/a
Camp Aranzazu Inc$12,50030%
Fisher House Inc$10,00040%
Rampart Vigilance Foundation$10,0001n/a
Mission Haus Foundation$10,0001n/a
The Hangry Donkey Sanctuary Inc$9,93024%
Furever Sunny$8,500218%
Southwest Wildlife Conservation Center$8,00020%
Coastal Bend Troop Support Inc$6,5003n/a
Another Chance Rft$6,50025%
Fulton Volunteer Fire Department Inc$6,00060%
The Charro Foundation$6,00030%
Stephen Siller Tunnel to Towers Foundation$5,0001n/a
Rockport Volunteer Fire Department Inc$5,00050%
Assumption Abbey$4,9002n/a
Humane Society of the Wt Mtns$4,50020%
Our Lady of Joy Roman Catholic Parish Carefree$4,5002n/a
Performing Animal Welfare Society$4,00020%
Adaptive Sports Foundation Inc$4,00020%
Young Life$3,50010%
Southwest Oasis Labrador Rescue Inc$3,00011%
Big Brothers Big Sisters of Southwest Colorado Inc$3,0001n/a
Arizona Humane Society$3,00010%
The Arizona Animal Welfare League$3,00010%
Rockport Little Theater$2,5001n/a
Rockport-Fulton Good Samarinc$2,50011%
Rockport Art Association Inc$2,50010%
Childhelp Inc$1,50010%

What it could do for these grantees

Plus 68 recipients with no EIN on record ($690k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Marguerite Sours Foundation supplied at peak.

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

Tap a dot to name the grantee.

How this is measured
Share of budget is the funder’s grant in a year over the grantee’s total revenue that year, at its highest across the years we hold; revenue is from all sources. Only grantees confirmed against their own filings, whose grants do not exceed their revenue, are plotted: the largest 25.

Nonprofits that may fit its grantmaking

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 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.

Compare Marguerite Sours Foundation with peer funders

About Marguerite Sours Foundation

How much does Marguerite Sours Foundation give?
Marguerite Sours Foundation reported 30 grants totaling $115,200 in its FY2025 IRS filing. It funded between 23 and 32 organizations a year over FY2018 to FY2024.
What does Marguerite Sours Foundation fund?
By grant dollars over FY2017 to FY2025, its largest causes are Education (30%), Animals (12%), Philanthropy (10%).
Who are Marguerite Sours Foundation's largest grantees?
By total granted over FY2017 to FY2025: Sacred Heart School ($56k), Central Catholic High School ($45k), Humane Society of Aransas County ($43k).
Does Marguerite Sours Foundation fund new organizations?
In FY2024, 31% of the organizations it funded were first-time grantees.
Does Marguerite Sours Foundation accept unsolicited applications?
Its most recent filing reports that it funds preselected organizations and does not take unsolicited requests. Check the foundation's own site before ruling it out.
Which funders back the same organizations as Marguerite Sours Foundation?
Its strongest co-funders, measured against what their size predicts, include Ed Rachal Foundation, Margaret Sue Rust Foundation, Barrow Foundation.
Where is Marguerite Sours Foundation based?
Marguerite Sours Foundation is based in AZ.

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

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