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· Private foundation

Nathan & Marlene Addlestone Foundation Inc

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.

$67k
Granted FY2025still arriving
30
Grants FY2025still arriving
7
States reached
$10k
Largest
01What it funds
0198% classified

What it funded, over time

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

Education$242kReligion$90kArts & Culture$65kHealth$64kPhilanthropy$36kFood & Nutrition$31kYouth Development$18kHuman Services$17kOther$0
02FY2025 · 30 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k29 grants · $57k
  • $10k–50k1 grant · $10k
$2,000
Median grant
7
States reached
$1.3M
Total assets
Largest grants
RecipientAmount
JEWISH ENDOWMENT FOUNDATION$10,000
TRIDENT TECHNICAL COLLEGE$6,500
TRIDENT LITERACY ASSOCIATION$5,000
AMERICAN LUNG ASSOCIATION$3,600
TEMPLE ISRAEL WESTPORT$3,125
KIDS ON POINT$2,500
CHARLESTON JEWISH FEDERATION$2,500
LOWCOUNTRY LOCAL FIRST$2,500
COLLEGE OF CHARLESTON NUOVO CINEMA$2,500
CHARLES WEBB CENTER$2,500
CONGREGATION DOR TIKVAH$2,350
CHARLESTON DAY SCHOOL$2,000
LOWCOUNTRY STREET GROCERY$2,000
SLOW FOOD CHARLESTON$2,000
COMMUNITY FOUNDATION OF GREATER FLINT$2,000
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 (FY18–22, $10k) land where the poverty rate runs at 12%, against an area that typically sits at 13%. 0% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 13%ABLE LIFE FOUNDATION: $3k → 12%ABLE LIFE FOUNDATION: $3k → 12%ABLE LIFE FOUNDATION: $3k → 12%ABLE LIFE FOUNDATION: $3k → 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
MI
NY
OH
CT
RI
CA
VA
NC
SC
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.

87%of every dollar goes to organizations it has funded before.
$496k · 57 repeat orgs$73k to everyone else

Grantees it renews have grown median revenue +78% since the first grant, against +6% for those funded once.

57 repeat relationships: 26 still active in FY2025, 31 since wound down; 2 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

57
31

Total granted

$496k
$70k

Median revenue growth · since first grant

+78%
+6%

Still filing today

37%
45%

New vs renewed · share of each year

In FY2025, 95% of grant dollars renewed an existing relationship; $3k 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
Arts & CultureHealthEducationReligionYouth DevelopmentHuman ServicesOther
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

  • AH
    ADDLESTONE HEBREW ACADEMY
    3× · 2017–2024 · $18k · revenue +178%
  • AL
    AMERICAN LUNG ASSOCIATION
    4× · 2017–2025 · $16k · revenue +175%
  • AF
    ASSOCIATION FOR THE BLIND AND VISUALLY IMPAIRED SOUTH CAROLINA
    9× · 2017–2025 · $14k · revenue +815%

Funded once

  • TI
    TEMPLE ISRAEL WESTPORT
    one grant, 2021 · $18k
  • IA
    INTERNATIONAL AFRICAN AMERICAN MUSEUM
    one grant, 2018 · $5k · revenue -25%
  • HC
    HISTORIC COMING ST CEMETERY TRUST
    one grant, 2019 · $5k
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
The Charleston Museum

To educate Charleston area residents and visitors about the natural and cultural history of the South Carolina Lowcountry through collections, exhibitions, preservation, conservation, research and related programming.

Arts & Culture
2
South Carolina Children's Theatre

Empowering and inspiring a new generation of changemakers through theatre. at scct, we define a changemaker as: someone who has empathy for others and is driven to make the world a better place. someone who is inquisitive, open minded, and…

Arts & Culture
3
Columbia Childrens Theatre

Inspired by the intelligence and emotional wisdom of young people, we create professional theatre for youth and families, foster inclusive community, and nurture meaningful learning through the arts. We provide these experiences through…

Arts & Culture
4
Carolina Art Association Dba Gibbes Museum of Art

The mission of the gibbes museum of art is to enhance lives through art by engaging people of every background and experience with art and artists of enduring quality; collect and preserve the art that touches charleston; and provide…

Arts & Culture
5
Charleston School of Law

The mission of the charleston school of law foundation inc is to encourage and assist the study, teaching, promoting and research of the rule of law in charleston, south carolina and all related subject areas as determined by the board of…

Education
6
Charlotte Ballet

Charlotte ballet's mission: through dance, we create authentic connections, engaging and inclusive educational opportunities, and transformative experiences. charlotte ballet's vision: we inspire individuals and communities to explore the…

Arts & Culture
7
Children's Trust of South Carolina

To strengthen families, organizations, and communities to prevent child abuse and neglect.

Human Services
8
Children's Center at Usc

Our mission is to provide the best quality education and care for children and to become a national model for early childhood education. in addition to providing a healthy learning environment for children, the center also provides an…

Education
9
Charleston Collegiate School

Charleston Collegiate Schools mission is to inspire students to become passionate, lifelong learners by empowering them with knowledge, creativity, curiosity and confidence to mindfully embrace the opportunities of tomorrow.

—
10
Sc Chamber of Commerce

Enhancing the quality of life for all south carolinians, achieving global competiteveness and ultimately increasing prosperity for sc citizens.

—
11
Charleston Literary Festival Inc

Charleston Literary Festival, Inc. produces a curated, annual program of events with a distinctly international flavor in the historic setting of Charleston, South Carolina. It brings together world class authors and speakers on a variety…

Arts & Culture
12
Chamber Music Charleston

Chamber Music Charleston is dedicated to developing the audience for classical music through chamber music concerts and educational programs of the highest caliber.

Arts & Culture
How this is measured
The grantee most central to the portfolio’s shape is Kids On Point Inc; the most unlike its peers is Pure Theatre. 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

40 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. 40 of the 92 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.

1
Load-bearing (≥25% of a budget)
14
Early backer (in before they grew)
38/40
Grantees still filing
26/40
Grew since first funded

Where the money sits, by cause and then by grantee

TRIDENT LITERACY ASSOCIATION INC: $31,500 · OtherTRIDENT LITERACY ASSOCIATION INCJEWISH ENDOWMENT FOUNDATION: $30,000 · OtherJEWISH ENDOWMENT FOUNDATIONRABBI ARTHUR SCHNEIER PARK EAST: $27,675 · OtherRABBI ARTHUR SCHNEIER PARK EASTTRIDENT TECHNICAL COLLEGE: $26,000 · OtherTRIDENT TECHNICAL COLLEGETEMPLE ISRAEL WESTPORT: $18,000 · OtherCOLLEGE OF CHARLESTON NUOVO CINEMA: $16,500 · OtherCONGREGATION DOR TIKVAH INC: $16,400 · OtherIndividual grant recipient: $15,000 · Other+57 more: $249,870 · Other+57 moreAMERICAN LUNG ASSOCIATION: $16,400 · HealthLOUIE'S KIDS INC: $9,000 · HealthHEALTH EDUCATION IS POWER: $6,000 · HealthMEDICAL UNIVERSITY OF SOUTH CAROLINA FOUNDATION: $3,000 · HealthMEMORIAL SLOAN-KETTERING CANCER CENTER: $2,500 · Health+2 more: $750 · HealthADDLESTONE HEBREW ACADEMY: $18,450 · EducationCOLLEGE OF CHARLESTON FOUNDATION: $10,000 · EducationCHARLESTON DAY SCHOOLINC: $5,000 · Education+1 more: $1,000 · EducationTHE BROOKLYN QUEENS CONSERVATORY OF MUSIC: $11,170 · Arts & CultureCHARLESTON STAGE COMPANY INC: $6,500 · Arts & CultureINTERNATIONAL AFRICAN AMERICAN MUSEUM: $5,000 · Arts & CultureBROOKLYN ACTING LAB INC: $3,500 · Arts & CultureTHE SANDRA BORNSTEIN HOLOCAUST EDUCATION CENTER: $2,000 · Arts & CultureBCT BROOKLYN CHILDREN'S THEATRE INC: $1,800 · Arts & Culture+4 more: $3,500 · Arts & CultureCOMMUNITY FOUNDATION OF GREATER FLINT: $16,000 · PhilanthropyCharleston Jewish Federation Inc: $10,500 · PhilanthropyCHABAD OF CHARLESTON INC: $20,000 · ReligionLOST AND FOUND MINISTRIES: $1,500 · ReligionYO ART INC: $9,000 · Youth DevelopmentTHE THERAPY PLACE INC: $2,500 · Youth Development
Other$430,945Health$37,650Education$34,450Arts & Culture$33,470Philanthropy$26,500Religion$21,500Youth Development$11,500

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

25%50%75%100%$10k$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetTRIDENT LITERACY ASSOCIATION INC: $31,500 over 6y, 1.2% of budgetCHABAD OF CHARLESTON INC: $20,000 over 4y, 0.2% of budgetADDLESTONE HEBREW ACADEMY: $18,450 over 3y, 0.3% of budgetAMERICAN LUNG ASSOCIATION: $16,400 over 4y, 0.0% of budgetCOMMUNITY FOUNDATION OF GREATER FLINT: $16,000 over 9y, 0.0% of budgetASSOCIATION FOR THE BLIND AND VISUALLY IMPAIRED SOUTH CAROLINA: $13,500 over 9y, 0.5% of budgetTHE BROOKLYN QUEENS CONSERVATORY OF MUSIC: $11,170 over 3y, 0.1% of budgetCharleston Jewish Federation Inc: $10,500 over 3y, 0.2% of budgetDisabilities Foundation of Charleston County: $10,000 over 4y, 2.1% of budgetKIDS ON POINT INC: $10,000 over 4y, 0.6% of budgetCOLLEGE OF CHARLESTON FOUNDATION: $10,000 over 2y, 0.0% of budgetYO ART INC: $9,000 over 3y, 5.3% of budgetLOUIE'S KIDS INC: $9,000 over 7y, 13% of budgetCHARLESTON STAGE COMPANY INC: $6,500 over 3y, 0.1% of budgetHEALTH EDUCATION IS POWER: $6,000 over 6y, 100% of budgetLowcountry Local First: $5,500 over 3y, 0.2% of budgetINTERNATIONAL AFRICAN AMERICAN MUSEUM: $5,000 over 1y, 0.0% of budgetCHARLESTON DAY SCHOOLINC: $5,000 over 3y, 0.0% of budgetWATER MISSIONS INTERNATIONAL: $3,500 over 7y, 0.0% of budgetBROOKLYN ACTING LAB INC: $3,500 over 3y, 0.3% of budgetMEDICAL UNIVERSITY OF SOUTH CAROLINA FOUNDATION: $3,000 over 2y, 0.0% of budgetMEMORIAL SLOAN-KETTERING CANCER CENTER: $2,500 over 1y, 0.0% of budgetCHARLESTON METRO CHAMBER OF COMMERCE: $2,000 over 2y, 0.0% of budgetTHE SANDRA BORNSTEIN HOLOCAUST EDUCATION CENTER: $2,000 over 2y, 0.3% of budgetBCT BROOKLYN CHILDREN'S THEATRE INC: $1,800 over 3y, 0.1% of budgetLOST AND FOUND MINISTRIES: $1,500 over 1y, 1.1% of budgetYESCAROLINA: $1,500 over 1y, 0.7% of budgetTHE BEE CAUSE PROJECT INC: $1,000 over 1y, 0.4% of budgetThe Maltz Museum of Jewish Heritage: $1,000 over 1y, 0.0% of budgetPure Theatre: $1,000 over 1y, 0.2% of budgetPET HELPERS INC: $1,000 over 2y, 0.0% of budgetMOCA CT INC: $1,000 over 1y, 0.0% of budgetCenter for a Better South: $500 over 1y, 1.2% of budgetOPERATION SIGHT: $500 over 1y, 0.4% of budgetChildren's Museum of the Lowcountry: $500 over 1y, 0.0% of budgetBOYS & GIRLS CLUB OF STAMFORD INC: $500 over 1y, 0.0% of budgetLOWCOUNTRY FIREFIGHTER SUPPORT TEAM: $500 over 1y, 0.7% of budgetSWING FOR THE LOWCOUNTRY INC: $250 over 1y, 0.2% 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 TRIDENT LITERACY ASSOCIATION INC ↗
  • Who funds CHABAD OF CHARLESTON INC ↗
  • Who funds ADDLESTONE HEBREW ACADEMY ↗
  • Who funds AMERICAN LUNG ASSOCIATION ↗
  • Who funds COMMUNITY FOUNDATION OF GREATER FLINT ↗
  • Who funds ASSOCIATION FOR THE BLIND AND VISUALLY IMPAIRED SOUTH CAROLINA ↗
  • Who funds THE BROOKLYN QUEENS CONSERVATORY OF MUSIC ↗
  • Who funds Charleston Jewish Federation Inc ↗
  • Who funds Disabilities Foundation of Charleston County ↗
  • Who funds KIDS ON POINT INC ↗
  • Who funds COLLEGE OF CHARLESTON FOUNDATION ↗
  • Who funds YO ART INC ↗
  • Who funds LOUIE'S KIDS INC ↗
  • Who funds CHARLESTON STAGE COMPANY INC ↗
  • Who funds HEALTH EDUCATION IS POWER ↗
  • Who funds Lowcountry Local First ↗
  • Who funds INTERNATIONAL AFRICAN AMERICAN MUSEUM ↗
  • Who funds CHARLESTON DAY SCHOOLINC ↗

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 Foundation of South Carolina IncSC46.7× affinity21 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 · Henry & Sylvia Yaschik Foundation Inc · The Joanna Foundation · Trident United Way · The Cohen Family Foundation · Patrick Family Foundation · Dominion Energy Charitable Foundation · Pathfinder Foundation Inc · The Mark Elliott Motley Foundation Inc · John Winthrop Charitable Trust · Daniel Island Community Fund Inc · Post and Courier 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 Nathan & Marlene Addlestone Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from Nathan & Marlene Addlestone Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%6%25%56%100%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 17%
  • Boys & Girls Club of Stamford Inc: 17% of income from government
no gov moneyreceives it· size = income
0get no government money at all
12report 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.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to Nathan & Marlene Addlestone Foundation Inc?

Find your warmest path to Nathan & Marlene Addlestone Foundation Inc 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 92 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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