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The Clyde and Summer Anderson Foundation at a glance

· Private foundation

The Clyde and Summer Anderson 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.

$575k
Granted FY2025still arriving
11
Grants FY2025still arriving
4
States reached
$228k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0192% classified

What it funded, over time

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

Health$3.1MEducation$1.6MReligion$452kArts & Culture$411kRecreation & Sports$85kHuman Services$55kPhilanthropy$30kEnvironment$29kOther$0
02FY2025 · 11 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k1 grant · $1k
  • $10k–50k8 grants · $170k
  • $50k–250k2 grants · $404k
$25,000
Median grant
4
States reached
$2.5M
Total assets
Largest grants
RecipientAmount
Individual grant recipient$227,500
GRACE CHURCH CATHEDRAL$176,250
DO FOR ONE NYC$25,000
Individual grant recipient$25,000
PARKINSON ASSOCIATION OF ALABAMA INC$25,000
CHARLESTON LITERARY FESTIVAL$25,000
PRESERVATION SOCIETY OF CHARLESTON$25,000
THE HOPE INSTITUTE$20,000
ALABAMA KIDNEY FOUNDATION$15,000
NANTUCKET PARTNERSHIP FOR CHILDREN$10,000
HISTORIC CHARLESTON FOUNDATION$1,196
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 (FY18–25, $70k) land where the poverty rate runs at 16%, against an area that typically sits at 11%. 93% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 11%THE KING'S HOME: $5k → 7%DO FOR ONE NYC: $25k → 17%DO FOR ONE NYC: $20k → 17%DO FOR ONE NYC: $15k → 17%DRAYTON HALL PRESERVATION TRUST: $5k → 12%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

IL
WI
MI
NY
MA
OH
CT
KY
VA
MD
TN
SC
AL
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.

67%of every dollar goes to organizations it has funded before.
$4.3M · 21 repeat orgs$2.1M to everyone else

Grantees it renews have grown median revenue +65% since the first grant, against 0% for those funded once.

21 repeat relationships: 6 still active in FY2025, 15 since wound down; 5 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

21
52

Total granted

$4.3M
$2.0M

Median revenue growth · since first grant

+65%
0%

Still filing today

57%
52%

New vs renewed · share of each year

In FY2025, 86% of grant dollars renewed an existing relationship; $81k 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
HealthEducationHuman ServicesArts & CulturePhilanthropyEnvironmentOther
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
    3× · 2020–2023 · $2.3M · revenue +377%
  • CD
    CHARLESTON DAY SCHOOLINC
    6× · 2018–2023 · $189k · revenue +69%
  • SL
    ST LUKE'S SCHOOL
    2× · 2017–2018 · $100k · revenue +60%

Funded once

  • UO
    UNIVERSITY OF NORTH ALABAMA FOUNDATIONgraduated
    one grant, 2021 · $900k · revenue +44%
  • CC
    CLEVELAND CLINIC FOUNDATION
    one grant, 2022 · $500k
  • UO
    UNIVERSITY OF ALABAMA AT BIRMINGHAM
    one grant, 2020 · $90k
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
United States Naval Institute

Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.

—
2
The Philadelphia School

The philadelphia school educates children for a future that is impossible to know but not impossible to shape. learn here. go anywhere.

—
3
Boston Architectural College

The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.

—
4
University of New Haven

The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…

Education
5
Furman University

The primary mission of furman as a liberal arts institution is to provide a distinctive education in fine arts, humanities, social sciences, mathematics and the sciences, as well as selected professional disciplines.

Education
6
Northeast College of Health Sciences

Northeast college of health sciences (the college) is committed to academic excellence, leadership, and professional best practices in the health sciences.

Education
7
New York School of Interior Design

New york school of interior design provides the most innovative, immersive, and transformative interior design education in the world, demonstrating the impact of professionally designed interiors on the health, happiness, and well-being…

Education
8
South Shore Charter School

The mission of south shore charter school is to cultivate students the tenacity, integrity, and curiosity needed to become innovative and socially responsible leaders, ready to face and solve the ever-changing challenges facing our…

Education
9
Trustees of the American School of Classical Studies at Athens

The broad mission of the ASCSA has remained constant over its distinguished history: teaching research archaeological exploration publication and dissemination of research. Founded in 1881 the ASCSA provides graduate students and scholars…

Arts & Culture
10
The Trustees of Princeton University

Research, education and general - princeton university is a private not-for-profit, non-sectarian institution of higher learning with approximately 5,700 undergraduate and 3,300 graduate students. 2,500 students graduated in the 2024-2025…

Education
11
Augustana College

Rooted in the liberal arts & sciences & lutheran expression of the christian faith, & is committed to offering a challenging education that develops qualities of mind, spirit, & body necessary for a rewarding life of leadership & service…

Education
12
Thomas Jefferson School of Law

The mission of the school is to provide outstanding legal education in a collegial and supportive environment with attention to newly emerging areas of law, particularly those related to technological development, globalization and the…

Education
How this is measured
The grantee most central to the portfolio’s shape is Make-a-Wish Foundation of Alabama; the most unlike its peers is Cainhoy Athletic Soccer Club. 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

43 grantees tracked through their own filings, 2017–2026.

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 2026, not grant rows in a single year, so this will not match the grant count on the cover. 43 of the 78 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)
7
Early backer (in before they grew)
43/43
Grantees still filing
25/43
Grew since first funded

Where the money sits, by cause and then by grantee

MEDICAL UNIVERSITY OF SOUTH CAROLINA FOUNDATION: $2,300,000 · HealthMEDICAL UNIVERSITY OF SOUTH CAROLINA FOUNDAT…+8 more: $195,000 · Health+8 moreCLEVELAND CLINIC FOUNDATION: $500,000 · OtherCLEVELAND CLINIC FOUNDATIONIndividual grant recipient: $402,500 · OtherIndividual grant recipientUNIVERSITY OF ALABAMA: $261,000 · OtherUNIVERSITY OF ALABAMAGRACE EPISCOPAL CHURCH: $251,250 · OtherGRACE EPISCOPAL CHURCHThe Preservation Society of Charleston Inc: $175,000 · OtherThe Preservation Society of Charleston In…GRACE CHURCH INC: $164,000 · OtherGRACE CHURCH INCUNIVERSITY OF ALABAMA AT BIRMINGHAM: $90,000 · Other+40 more: $517,612 · Other+40 moreUNIVERSITY OF NORTH ALABAMA FOUNDATION: $900,000 · EducationUNIVERSITY OF NORTH A…CHARLESTON DAY SCHOOLINC: $189,269 · EducationCHARLESTON DAY SCHOOL…ST LUKE'S SCHOOL: $100,000 · EducationST LUKE'S SCHOOL+5 more: $32,000 · EducationCharleston Literary Festival Inc: $100,000 · Arts & CultureINTERNATIONAL AFRICAN AMERICAN MUSEUM: $25,000 · Arts & CultureChildren's Museum of the Lowcountry: $10,000 · Arts & Culture+1 more: $2,000 · Arts & CultureDo For One NYC: $60,000 · Human ServicesThe Hope Institute: $20,000 · Human ServicesKings Home Inc: $5,000 · Human ServicesDRAYTON HALL PRESERVATION TRUST: $4,600 · Human ServicesUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $29,700 · PhilanthropyPARKINSON ASSOCIATION OF ALABAMA INC: $25,000 · PhilanthropyJEFFERSON SCHOLARS FOUNDATION: $5,000 · PhilanthropyDAVID LYNCH FOUNDATION FOR CONSCIOUSNESS -BASED EDUCATION AND WORLD PEACE: $2,500 · PhilanthropyNANTUCKET CONSERVATION FOUNDATION INC: $25,000 · EnvironmentOPEN SPACE INSTITUTE INC: $4,000 · Environment
Health$2,495,000Other$2,361,362Education$1,221,269Arts & Culture$137,000Human Services$89,600Philanthropy$62,200Environment$29,000

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 budgetMEDICAL UNIVERSITY OF SOUTH CAROLINA FOUNDATION: $2,300,000 over 3y, 3.4% of budgetUNIVERSITY OF NORTH ALABAMA FOUNDATION: $900,000 over 1y, 10% of budgetCHARLESTON DAY SCHOOLINC: $189,269 over 6y, 0.6% of budgetThe Preservation Society of Charleston Inc: $175,000 over 6y, 1.4% of budgetST LUKE'S SCHOOL: $100,000 over 2y, 0.3% of budgetCharleston Literary Festival Inc: $100,000 over 4y, 3.9% of budgetAlabama Kidney Foundation Inc: $75,000 over 6y, 0.8% of budgetDo For One NYC: $60,000 over 3y, 11% of budgetTHE FOUNDATION FIGHTING BLINDNESS INC: $50,000 over 1y, 0.1% of budgetUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $29,700 over 3y, 0.0% of budgetSTOP THE ADDICTION FATALITY EPIDEMIC (SAFE) PROJECT US: $25,000 over 1y, 1.3% of budgetINTERNATIONAL AFRICAN AMERICAN MUSEUM: $25,000 over 1y, 0.2% of budgetCHI OMEGA FOUNDATION: $25,000 over 1y, 0.3% of budgetNANTUCKET CONSERVATION FOUNDATION INC: $25,000 over 1y, 0.1% of budgetSMILE-A-MILE: $17,500 over 4y, 0.3% of budgetASHLEY HALL FOUNDATION: $15,000 over 1y, 0.1% of budgetDEE NORTON LOWCOUNTRY CHILDREN'S CENTER: $12,600 over 1y, 0.4% of budgetEnough Pie: $12,000 over 1y, 6.8% of budgetNATIONAL BOOK FOUNDATION INC: $10,790 over 1y, 0.3% of budgetCAINHOY ATHLETIC SOCCER CLUB: $10,000 over 1y, 2.3% of budgetChildren's Museum of the Lowcountry: $10,000 over 1y, 0.4% of budgetALZHEIMER'S DISEASE & RELATED DISORDERS ASSOCIATION INC: $10,000 over 1y, 0.0% of budgetNANTUCKET PARTNERSHIP FOR CHILDREN INC: $10,000 over 1y, 0.1% of budgetGODDARD RIVERSIDE COMMUNITY CENTER: $10,000 over 3y, 0.0% of budgetMAKE-A-WISH FOUNDATION OF ALABAMA: $10,000 over 1y, 0.2% of budgetSCREAMING EAGLE FOUNDATION: $5,000 over 1y, 2.2% of budgetCUTANEOUS LYMPHOMA FOUNDATION: $5,000 over 1y, 0.5% of budgetKings Home Inc: $5,000 over 1y, 0.1% of budgetLITERACY COUNCIL OF TYLER DBA PAVE EAST TEXAS: $5,000 over 1y, 0.1% of budgetDRAYTON HALL PRESERVATION TRUST: $4,600 over 1y, 0.1% of budgetOPEN SPACE INSTITUTE INC: $4,000 over 1y, 0.1% of budgetBEAUTIFUL GATE CENTER: $2,500 over 1y, 0.3% of budgetDAVID LYNCH FOUNDATION FOR CONSCIOUSNESS -BASED EDUCATION AND WORLD PEACE: $2,500 over 1y, 0.0% of budgetSTUDIO BY THE TRACKS INC: $2,000 over 2y, 0.5% of budgetTRINITY PRESBYTERIAN SCHOOL INC: $2,000 over 2y, 0.0% of budgetCharleston Library Society: $1,750 over 1y, 0.1% of budgetDANNY & RONS RESCUE: $1,000 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 MEDICAL UNIVERSITY OF SOUTH CAROLINA FOUNDATION ↗
  • Who funds UNIVERSITY OF NORTH ALABAMA FOUNDATION ↗
  • Who funds CHARLESTON DAY SCHOOLINC ↗
  • Who funds The Preservation Society of Charleston Inc ↗
  • Who funds ST LUKE'S SCHOOL ↗
  • Who funds Charleston Literary Festival Inc ↗
  • Who funds Alabama Kidney Foundation Inc ↗
  • Who funds Do For One NYC ↗
  • Who funds THE FOUNDATION FIGHTING BLINDNESS INC ↗
  • Who funds UNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC ↗
  • Who funds STOP THE ADDICTION FATALITY EPIDEMIC (SAFE) PROJECT US ↗
  • Who funds INTERNATIONAL AFRICAN AMERICAN MUSEUM ↗
  • Who funds CHI OMEGA FOUNDATION ↗
  • Who funds NANTUCKET CONSERVATION FOUNDATION INC ↗
  • Who funds PARKINSON ASSOCIATION OF ALABAMA INC ↗
  • Who funds The Hope Institute ↗
  • Who funds SMILE-A-MILE ↗
  • Who funds ASHLEY HALL FOUNDATION ↗
  • Who funds DEE NORTON LOWCOUNTRY CHILDREN'S CENTER ↗
  • Who funds Enough Pie ↗
  • Who funds NATIONAL BOOK FOUNDATION INC ↗
  • Who funds CAINHOY ATHLETIC SOCCER CLUB ↗

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.

Coastal Community Fou…John Winthrop Charita…Protective Life Found…Altecstyslinger Found…The Community Foundat…Guffey Family Foundat…Almeida Family Founda…Hill Crest Foundation…Gaylord and Dorothy D…The Daniel Foundation…Alabama Power Foundat…Gs Donor Advised Phil…
Coastal Community Foundation of South Carolina IncSC24.9× affinity10 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Coastal Community Foundation of South Carolina Inc · John Winthrop Charitable Trust · Protective Life Foundation · Altecstyslinger Foundation · The Community Foundation of Greater Birmingham · Guffey Family Foundation · Almeida Family Foundation · Hill Crest Foundation Inc · Gaylord and Dorothy Donnelley Foundation · The Daniel Foundation of Alabama · Alabama Power Foundation Inc · Gs Donor Advised Philanthropy Fund for Wealth Management 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 The Clyde and Summer Anderson Foundation funds: left to right is the share of its income from government, bottom to top the share from The Clyde and Summer Anderson Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 20%1%4%8%15%funder's share of their income ↑0%10%20%30%40%share of the org’s income from government →median 4%
  • Nantucket Conservation Foundation Inc: 4% of income from government
no gov moneyreceives it· size = income
2get no government money at all
13report 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.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to The Clyde and Summer Anderson Foundation?

Find your warmest path to The Clyde and Summer Anderson Foundation 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.

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 78 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 Clyde and Summer Anderson’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