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Tianaderrah Foundation (DE) at a glance

· Private foundation

Tianaderrah Foundation (DE)

Its FY2024 filing reports that it accepted unsolicited grant applications.

$1.5M
Granted FY2024still arriving
18
Grants FY2024still arriving
6
States reached
$250k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0199% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2019 to 2024.

Education$4.1MArts & Culture$1.6MHuman Services$600kInternational$335kEnvironment$310kPhilanthropy$5kOther$0
02FY2024 · 18 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k1 grant · $5k
  • $10k–50k6 grants · $160k
  • $50k–250k10 grants · $1.1M
  • $250k+1 grant · $250k
$100,000
Median grant
6
States reached
$19M
Total assets
Largest grants
RecipientAmount
Sofia America Schools Inc$250,000
American Foundation for Bulgaria$200,000
World Monuments Fund$125,000
American University in Bulgaria$125,000
Sonnenberg Gardens & Mansion State Historic Park$105,000
Montgomery County Historical Society$100,000
Individual grant recipient$100,000
Metropolitan Museum of Art$100,000
Bulgarian American Society$100,000
New York University$70,000
Princeton University$60,000
Children of Armenia Fund$40,000
Guilford Historical Society$35,000
International Humanitarian Missions$30,000
Weill Cornell Medicine$25,000
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 (FY19–24, $650k) land where the poverty rate runs at 7%, against an area that typically sits at 9%. 8% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 9%International Humanitarian Missions: $30k → 10%Bulgarian American Society: $100k → 7%International Humanitarian Missions: $20k → 10%Bulgarian American Society: $100k → 7%Bulgarian American Society: $100k → 7%Bulgarian American Society: $100k → 7%Bulgarian American Society: $100k → 7%Bulgarian American Society: $100k → 7%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.
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.

97%of every dollar goes to organizations it has funded before.
$6.8M · 17 repeat orgs$235k to everyone else

Grantees it renews have grown median revenue +50% since the first grant, against 0% for those funded once.

17 repeat relationships: 14 still active in FY2024, 3 since wound down; 3 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

17
3

Total granted

$6.8M
$235k

Median revenue growth · since first grant

+50%
0%

Still filing today

94%
33%

New vs renewed · share of each year

In FY2024, 84% of grant dollars renewed an existing relationship; $235k went to new ones.

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

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

’19’20’21’22’23’24
Arts & CultureInternationalEducationHuman ServicesPhilanthropyEnvironmentOther
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

  • SA
    SOFIA AMERICAN SCHOOLS INC
    6× · 2019–2024 · $1.4M · revenue +50%
  • AF
    American Foundation for Bulgaria Inc
    6× · 2019–2024 · $1.3M · revenue +9% · 38% of their budget
  • WM
    WORLD MONUMENTS FUND INC
    6× · 2019–2024 · $750k · revenue +135%

Funded once

  • MC
    MONTGOMERY COUNTY HISTORICAL SOCIETY
    one grant, 2024 · $100k · revenue 0% · 45% of their budget
  • IG
    Individual grant recipient
    one grant, 2024 · $100k
  • GH
    GUILFORD HISTORICAL SOCIETY
    one grant, 2024 · $35k
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
Berggruen Institute
Education
2
The Brooklyn Institute of Arts and Sciences

The mission of the brooklyn institute of arts and sciences, d/b/a brooklyn museum (the "museum") is to bring people together through art and experiences that inspire celebration, compassion, courage, and the will to act. (see schedule o).

Arts & Culture
3
American Museum of Natural History

The museum's mission statement is: "to discover, interpret, and disseminate - through scientific research and education - knowledge about human cultures, the natural world, and the universe."

Arts & Culture
4
Blavatnik Archive Foundation
Arts & Culture
5
The Central European University

Ceu is committed to promoting the values of open society and self-reflective critical thinking. it aims at excellence in the mastery of established knowledge, courage to pursue the creation of new knowledge in the humanities, the social…

International
6
Institute for Advanced Study - Louis Bamberger & Mrs Felix Fuld Foundation

The institute for advanced study (the institute) is one of the world's leading centers for theoretical research and intellectual inquiry. see schedule o.

Science & Tech
7
Henry E Huntington Library and Art Gallery

The huntington library, art museum, and botanical gardens shares its world-renowned collections to support scholarship, foster learning, inspire creativity, and offer transformative experiences for diverse audiences.

Arts & Culture
8
The Pierpont Morgan Library

The Morgan Library & Museum celebrates and shares the history and process of human creativity from antiquity to the present day through the preservation, study, and interpretation of a dynamic and growing collection.

Education
9
Bard College

Bard college seeks to provide a challenging academic program and a supportive environment that fosters a collaborative interchange of ideas in the classroom as well as ambition to achieve excellence.

Education
10
Eastern European Jewish Heritage Foundation
Philanthropy
11
The United States Holocaust Memorial Museum

Chartered by a unanimous act of congress, the museum is america's national institution for the documentation, study, interpretation, and education of holocaust history and serves as our country's memorial to the victims of the holocaust.…

Arts & Culture
12
Isabella Stewart Gardner Museum Inc

Organization's mission statement true to the ambitious vision of its founder and her spirit of creative risk-taking, the mission of the isabella stewart gardner museum is: - to bring to life and preserve the rich historic collection; - to…

Arts & Culture
How this is measured
The grantee most central to the portfolio’s shape is Sofia American Schools Inc; the most unlike its peers is Guilford Historical Society. 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

18 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. 18 of the 21 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.

3
Load-bearing (≥25% of a budget)
3
Early backer (in before they grew)
18/18
Grantees still filing
14/18
Grew since first funded

Where the money sits, by cause and then by grantee

SOFIA AMERICAN SCHOOLS INC: $1,400,000 · InternationalSOFIA AMERICAN SCHOOLS INCAMERICAN UNIVERSITY IN BULGARIA: $430,000 · InternationalAMERICAN UNIVERSITY IN BULGARIACHILDREN OF ARMENIA FUND INC DBA CHILDREN OF ARMENIA FUND COAF: $225,000 · InternationalCHILDREN OF ARMENIA FUND INC DBA C…+1 more: $60,000 · InternationalAmerican Foundation for Bulgaria Inc: $1,250,000 · EducationAmerican Foundation for Bulgaria …The Trustees of Princeton University: $435,000 · EducationThe Trustees of Princeton Univers…New York University: $330,000 · EducationNew York University+1 more: $50,000 · EducationWORLD MONUMENTS FUND INC: $750,000 · Arts & CultureWORLD MONUMENTS FUND INCMETROPOLITAN MUSEUM OF ART: $400,000 · Arts & CultureMETROPOLITAN MUSEUM OF A…THE FARMERS MUSEUM INC: $165,000 · Arts & CultureTHE FARMERS MUSEUM INCMONTGOMERY COUNTY HISTORICAL SOCIETY: $100,000 · Arts & CultureMONTGOMERY COUNTY HISTOR…FENIMORE ART MUSEUM: $100,000 · Arts & CultureFENIMORE ART MUSEUM+1 more: $35,000 · Arts & CultureBULGARIAN-AMERICAN SOCIETY INC: $600,000 · Human ServicesBULGARIAN-…INTERNATIONAL HUMANITARIAN MISSIONS INC: $50,000 · Human ServicesINTERNATIO…SONNENBERG GARDENS AND MANSION- STATE HISTORIC PARK: $310,000 · EnvironmentWeill Cornell Medicine: $150,000 · OtherIndividual grant recipient: $100,000 · OtherNext Generation Bulgaria Fund: $85,000 · PhilanthropyBoston Foundation Inc: $5,000 · Philanthropy
International$2,115,000Education$2,065,000Arts & Culture$1,550,000Human Services$650,000Environment$310,000Other$250,000Philanthropy$90,000

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 budgetSOFIA AMERICAN SCHOOLS INC: $1,400,000 over 6y, 3.3% of budgetAmerican Foundation for Bulgaria Inc: $1,250,000 over 6y, 38% of budgetWORLD MONUMENTS FUND INC: $750,000 over 6y, 1.1% of budgetBULGARIAN-AMERICAN SOCIETY INC: $600,000 over 6y, 68% of budgetThe Trustees of Princeton University: $435,000 over 6y, 0.0% of budgetAMERICAN UNIVERSITY IN BULGARIA: $430,000 over 6y, 7.7% of budgetMETROPOLITAN MUSEUM OF ART: $400,000 over 4y, 0.0% of budgetNew York University: $330,000 over 4y, 0.0% of budgetSONNENBERG GARDENS AND MANSION- STATE HISTORIC PARK: $310,000 over 3y, 15% of budgetCHILDREN OF ARMENIA FUND INC DBA CHILDREN OF ARMENIA FUND COAF: $225,000 over 6y, 0.6% of budgetTHE FARMERS MUSEUM INC: $165,000 over 2y, 3.2% of budgetMONTGOMERY COUNTY HISTORICAL SOCIETY: $100,000 over 1y, 45% of budgetFENIMORE ART MUSEUM: $100,000 over 2y, 1.3% of budgetNext Generation Bulgaria Fund: $85,000 over 6y, 14% of budgetAMERICAN FRIENDS OF GEORGIA INC: $60,000 over 6y, 2.6% of budgetSWEET BRIAR INSTITUTE: $50,000 over 2y, 0.1% of budgetINTERNATIONAL HUMANITARIAN MISSIONS INC: $50,000 over 2y, 8.2% of budgetBoston Foundation Inc: $5,000 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.

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.

The Tianaderrah Found…Greater Hudson Herita…American Online Givin…Donor Advised Charita…Fidelity Investments …Amazonsmile Foundation
The Tianaderrah Foundation (NY)NY13.6× affinity4 shared granteesties to 5 of 5Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Tianaderrah Foundation (NY) · Greater Hudson Heritage Network · 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 Tianaderrah Foundation (DE) funds: left to right is the share of its income from government, bottom to top the share from Tianaderrah Foundation (DE). Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 20%5%19%42%75%funder's share of their income ↑0%5%10%15%20%share of the org’s income from government →median 11%
  • The Trustees of Princeton University: 11% of income from government
  • Boston Foundation Inc: 0% of income from government
no gov moneyreceives it· size = income
2get no government money at all
4report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–20%
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 Tianaderrah Foundation (DE)?

Find your warmest path to Tianaderrah Foundation (DE) 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 21 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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Tianaderrah Foundation (DE)’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