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The Arthur F and Isadora Dellheim Foundation Inc at a glance

· Private foundation

The Arthur F and Isadora Dellheim 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.

$59k
Granted FY2025still arriving
29
Grants FY2025still arriving
8
States reached
$13k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
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.

Arts & Culture$199kEducation$126kReligion$28kHealth$14kFood & Nutrition$7kScience & Tech$6kEnvironment$4kCivil Rights$4kOther$0
02FY2025 · 29 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k27 grants · $34k
  • $10k–50k2 grants · $25k
$500
Median grant
8
States reached
$648k
Total assets
Largest grants
RecipientAmount
BALTIMORE CHORAL ARTS$12,500
JOHNS HOPKINS UNIVERSITY$12,500
BALTIMORE SYMPHONY ORCHESTRA$6,000
Individual grant recipient$6,000
WALTERS ART MUSEUM$6,000
SHRIVER HALL CONCERT SERIES$3,560
Individual grant recipient$3,000
METROPOLITAN OPERA GUILD$1,680
J STREET EDUCATION FUND INC$1,000
JEWISH MUSEUM OF MARYLAND$1,000
WEIZMANN INSTITUTE OF SCIENCE$1,000
U S HOLOCAUST MUSEUM$500
SMITHSONIAN INSTITUTION$500
MAZON$500
KENNEDY KRIEGER INSTITUTE$500
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:

Dollar for dollar, its grants (FY17–25) land where the poverty rate runs at 16%, against an area that typically sits at 10%. 89% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%TANGLEWOOD SOCIETY: $3k → 12%TANGLEWOOD SOCIETY: $5k → 16%NOLA JAZZ HERITAGE: $6k → 23%BALTIMORE SYMPHONY ORCHESTRA: $6k → 8%BSO-POPS-TANGLEWOOD: $3k → 12%BALTIMORE SYMPHONY ORCHESTRA: $6k → 8%TANGLEWOOD SOCIETY: $3k → 12%METROPOLITAN OPERA GUILD: $3k → 17%BALTIMORE SYMPHONY ORCHESTRA: $6k → 8%BALTIMORE SYMPHONY ORCHESTRA: $3k → 8%BALTIMORE SYMPHONY ORCHESTRA: $3k → 8%BALTIMORE SYMPHONY ORCHESTRA: $3k → 8%BALTIMORE SYMPHONY ORCHESTRA: $3k → 8%BALTIMORE SYMPHONY ORCHESTRA: $3k → 8%TEMPLE OHEB SHALOM: $4k → 11%JOHNS HOPKINS UNIVERSITY: $15k → 19%JOHNS HOPKINS UNIVERSITY: $15k → 19%JOHNS HOPKINS UNIVERSITY: $15k → 19%JOHNS HOPKINS UNIVERSITY: $15k → 19%JOHNS HOPKINS UNIVERSITY: $15k → 19%JOHNS HOPKINS UNIVERSITY: $15k → 19%JOHNS HOPKINS UNIVERSITY: $13k → 19%JOHNS HOPKINS UNIVERSITY: $10k → 19%JOHNS HOPKINS UNIVERSITY: $5k → 19%JOHNS HOPKINS UNIVERSITY: $5k → 19%BALTIMORE CHORAL ARTS: $13k → 19%SHRIVER HALL CONCERT SERIES: $4k → 19%BALTIMORE CHORAL ARTS: $5k → 19%BALTIMORE MUSEUM OF ART: $3k → 19%BALTIMORE CHORAL ARTS SOCIETY INC: $5k → 19%SHRIVER HALL CONCERT SERIES: $3k → 19%BALTIMORE CHORAL ARTS: $5k → 19%SHRIVER HALL CONCERT SERIES: $3k → 19%BALTIMORE CHORAL ARTS: $5k → 19%SHRIVER HALL CONCERT SERIES: $3k → 19%BALTIMORE CHORAL ARTS: $5k → 19%BALTIMORE MUSEUM OF ART: $3k → 19%BALTIMORE CHORAL ARTS: $5k → 19%SHRIVER HALL CONCERT SERIES: $3k → 19%BALTIMORE CHORAL ARTS: $5k → 19%SHRIVER HALL CONCERT SERIES: $3k → 19%SHRIVER HALL CONCERT SERIES: $3k → 19%BALTIMORE MUSEUM OF ART: $3k → 19%WALTERS ART MUSEUM: $6k → 19%WALTERS ART MUSEUM: $3k → 19%THE WALTERS ART MUSEUM: $3k → 19%WALTERS ART MUSEUM: $3k → 19%WALTERS ART MUSEUM: $3k → 19%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
NY
MA
CA
VA
MD
AZ
NM
DC
OK
LA
AL
TX
FL
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.

94%of every dollar goes to organizations it has funded before.
$392k · 61 repeat orgs$24k to everyone else

61 repeat relationships: 21 still active in FY2025, 40 since wound down; 8 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

61
26

Total granted

$392k
$17k

Median revenue growth · since first grant

+37%
+81%

Still filing today

46%
42%

New vs renewed · share of each year

In FY2025, 87% of grant dollars renewed an existing relationship; $7k 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 & CultureHealthEducationInternationalReligionCrime & LegalOther
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

  • JOHNS HOPKINS UNIVERSITY
    9× · 2017–2025 · $123k · revenue +64%
  • BS
    BALTIMORE SYMPHONY ORCHESTRA INC
    8× · 2017–2025 · $33k · revenue +68%
  • SH
    SHRIVER HALL CONCERT SERIES INC
    7× · 2018–2025 · $22k · revenue +57%

Funded once

  • BC
    BALTIMORE CHORAL ARTS SOCIETY INCgraduated
    one grant, 2018 · $5k · revenue +60%
  • HS
    HAR SINAI - OHEB SHALOM CONGREGATION INC
    one grant, 2023 · $3k
  • JS
    JAMES SMITHSON SOCIETY
    one grant, 2018 · $3k
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
Massachusetts Institute of Technology

The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.

Education
2
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.

—
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 Maryland Anesthesiology Associates Pa

Under the medical service plan of the university of maryland school of medicine, medical services are rendered by the members of the faculty on behalf of the school of medicine in connection with their duties to provide clinical…

—
5
American Academy of Neurology

The Academy's mission is to enhance member career fulfillment and promote brain health for all.

Community Improvement
6
University of Maryland Neurosurgeryassociates Pa

Under the medical service plan of the university of maryland school of medicine, medical services are rendered by the members of the faculty on behalf of the school of medicine in connection with their duties to provide clinical…

Education
7
University of Maryland Oncology Associates Pa

Under the medical service plan of the university of maryland school of medicine, medical services are rendered by the members of the faculty on behalf of the school of medicine in connection with their duties to provide clinical…

Health
8
University of Maryland Dermatologists Pa

Under the medical service plan of the university of maryland school of medicine, medical services are rendered by the members of the faculty on behalf of the school of medicine in connection with their duties to provide clinical…

Health
9
University of Maryland Physicians Pa

Under the medical service plan of the university of maryland school of medicine, medical services are rendered by the members of the faculty on behalf of the school of medicine in connection with their duties to provide clinical…

—
10
University of Maryland Surgical Associates Pa

Under the medical service plan of the university of maryland school of medicine, medical services are rendered by the members of the faculty on behalf of the school of medicine in connection with their duties to provide clinical…

Health
11
University of Maryland Neurology Associates Pa

Under the medical service plan of the university of maryland school of medicine, medical services are rendered by the members of the faculty on behalf of the school of medicine in connection with their duties to provide clinical…

—
12
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
How this is measured
The grantee most central to the portfolio’s shape is March of Dimes Inc; the most unlike its peers is Mica Inc. 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

44 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. 44 of the 95 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)
10
Early backer (in before they grew)
42/44
Grantees still filing
34/44
Grew since first funded

Where the money sits, by cause and then by grantee

BALTIMORE CHORAL ARTS: $42,500 · OtherBALTIMORE CHORAL ARTSWALTERS ART MUSEUM: $21,000 · OtherWALTERS ART MUSEUMTEMPLE OHEB SHALOM: $13,427 · OtherTEMPLE OHEB SHALOMTANGLEWOOD SOCIETY: $11,000 · OtherTANGLEWOOD SOCIETYMETROPOLITAN OPERA: $8,500 · OtherTHE FORWARD: $6,750 · OtherMAZON A Jewish Response to Hunger: $6,250 · OtherIndividual grant recipient: $6,000 · Other+54 more: $57,246 · Other+54 moreJOHNS HOPKINS UNIVERSITY: $122,500 · EducationJOHNS HOPKINS UNIVERSITY+4 more: $3,200 · EducationBALTIMORE SYMPHONY ORCHESTRA INC: $33,000 · Arts & CultureBALTIMORE SYMPHONY ORCHEST…SHRIVER HALL CONCERT SERIES INC: $21,560 · Arts & CultureSHRIVER HALL CONCERT SERIE…BALTIMORE MUSEUM OF ART: $11,000 · Arts & CultureBALTIMORE MUSEUM OF ARTThe Metropolitan Opera Guild Inc: $9,180 · Arts & CultureThe Metropolitan Opera Gui…SMITHSONIAN INSTITUTION: $5,904 · Arts & CultureSMITHSONIAN INSTITUTIONBALTIMORE CHORAL ARTS SOCIETY INC: $5,000 · Arts & CultureThe United States Holocaust Memorial Museum: $5,000 · Arts & CultureJEWISH MUSEUM OF MARYLAND INC: $3,750 · Arts & Culture+6 more: $4,504 · Arts & CultureALZHEIMER'S DISEASE & RELATED DISORDERS ASSOCIATION INC: $6,100 · HealthAmerican Heart Association Inc: $500 · HealthMacular Degeneration Association: $403 · Health+5 more: $850 · HealthJ STREET EDUCATION FUND INC: $7,500 · ReligionHIAS INC: $1,150 · InternationalAMERICAN COMMITTEE FOR THE WEIZMANN INSTITUTE OF SCIENCE INC: $1,000 · InternationalMICA INC: $250 · InternationalMEDECINS SANS FRONTIERES USA INC: $100 · InternationalSOUTHERN POVERTY LAW CENTER INC: $1,500 · Crime & Legal
Other$172,673Education$125,700Arts & Culture$98,898Health$7,853Religion$7,500International$2,500Crime & Legal$1,500

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 budgetJOHNS HOPKINS UNIVERSITY: $122,500 over 9y, 0.0% of budgetBALTIMORE SYMPHONY ORCHESTRA INC: $33,000 over 8y, 0.0% of budgetSHRIVER HALL CONCERT SERIES INC: $21,560 over 7y, 0.5% of budgetBALTIMORE MUSEUM OF ART: $11,000 over 4y, 0.0% of budgetThe Metropolitan Opera Guild Inc: $9,180 over 5y, 0.6% of budgetJ STREET EDUCATION FUND INC: $7,500 over 8y, 0.0% of budgetMAZON A Jewish Response to Hunger: $6,250 over 9y, 0.0% of budgetALZHEIMER'S DISEASE & RELATED DISORDERS ASSOCIATION INC: $6,100 over 7y, 0.0% of budgetSMITHSONIAN INSTITUTION: $5,904 over 7y, 0.0% of budgetThe United States Holocaust Memorial Museum: $5,000 over 6y, 0.0% of budgetJEWISH MUSEUM OF MARYLAND INC: $3,750 over 7y, 0.0% of budgetMETROPOLITAN MUSEUM OF ART: $3,010 over 6y, 0.0% of budgetTHE VALLEYS PLANNING COUNCIL INC: $3,000 over 6y, 0.2% of budgetSOUTHERN POVERTY LAW CENTER INC: $1,500 over 2y, 0.0% of budgetOUTSIDE IN PRODUCTIONS: $1,500 over 2y, 0.3% of budgetST JOHN'S COLLEGE: $1,250 over 3y, 0.0% of budgetHIAS INC: $1,150 over 7y, 0.0% of budgetMaryland Institute: $1,000 over 2y, 0.0% of budgetAMERICAN COMMITTEE FOR THE WEIZMANN INSTITUTE OF SCIENCE INC: $1,000 over 1y, 0.0% of budgetMaryland Opera Inc: $1,000 over 1y, 0.3% of budgetTHE MARYLAND FOOD BANK INC: $800 over 8y, 0.0% of budgetINDEPENDENT COLLEGE FUND OF MARYLAND INC: $750 over 3y, 0.1% of budgetNational Disability Rights Network Inc: $750 over 1y, 0.0% of budgetCHESAPEAKE BAY FOUNDATION INC: $650 over 3y, 0.0% of budgetAmerican Heart Association Inc: $500 over 5y, 0.0% of budgetMuseum of Modern Art: $500 over 1y, 0.0% of budgetMacular Degeneration Association: $403 over 4y, 0.0% of budgetNEWSEUM INC: $400 over 2y, 0.0% of budgetGREATER WASHINGTON EDUCATIONAL TELECOMMUNICATIONS ASSOCIATION INC: $400 over 4y, 0.0% of budgetAMERICAN CIVIL LIBERTIES UNION OF THE DISTRICT OF COLUMBIA: $400 over 4y, 0.0% of budgetChevra Ahavas Chesed Inc: $305 over 3y, 0.2% of budgetMICA INC: $250 over 1y, 0.9% of budgetMARCH OF DIMES INC: $250 over 4y, 0.0% of budgetNEVUS OUTREACH INC: $250 over 1y, 0.1% of budgetNATIONAL MULTIPLE SCLEROSIS SOCIETY: $200 over 2y, 0.0% of budgetBach Concert Series Inc: $200 over 1y, 0.1% of budgetGOUCHER COLLEGE: $200 over 2y, 0.0% of budgetBLOOD CANCER UNITED INC: $100 over 1y, 0.0% of budgetTHE MARYLAND SPCA INC: $100 over 1y, 0.0% of budgetTHE HEARD MUSEUM: $75 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 JOHNS HOPKINS UNIVERSITY ↗
  • Who funds BALTIMORE SYMPHONY ORCHESTRA INC ↗
  • Who funds SHRIVER HALL CONCERT SERIES INC ↗
  • Who funds BALTIMORE MUSEUM OF ART ↗
  • Who funds The Metropolitan Opera Guild Inc ↗
  • Who funds J STREET EDUCATION FUND INC ↗
  • Who funds MAZON A Jewish Response to Hunger ↗
  • Who funds ALZHEIMER'S DISEASE & RELATED DISORDERS ASSOCIATION INC ↗
  • Who funds SMITHSONIAN INSTITUTION ↗
  • Who funds BALTIMORE CHORAL ARTS SOCIETY INC ↗
  • Who funds The United States Holocaust Memorial Museum ↗
  • Who funds JEWISH MUSEUM OF MARYLAND INC ↗
  • Who funds METROPOLITAN MUSEUM OF ART ↗
  • Who funds THE VALLEYS PLANNING COUNCIL INC ↗
  • Who funds SOUTHERN POVERTY LAW CENTER INC ↗
  • Who funds OUTSIDE IN PRODUCTIONS ↗
  • Who funds ST JOHN'S COLLEGE ↗
  • Who funds HIAS INC ↗
  • Who funds Maryland Institute ↗
  • Who funds AMERICAN COMMITTEE FOR THE WEIZMANN INSTITUTE OF SCIENCE INC ↗

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.

Baltimore Community F…T Rowe Price Program …Eliasberg Family Foun…The William G Baker J…Associated Jewish Cha…Peggy & Yale Gordon C…The John J Leidy Foun…Hecht-Levi Foundation…The Rothschild Charit…Alvin and Louise Myer…The Henry and Ruth Bl…Dr Frank C Marino Fou…
Baltimore Community Foundation IncMD21.1× affinity8 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Baltimore Community Foundation Inc · T Rowe Price Program for Charitable Giving Inc · Eliasberg Family Foundation Inc · The William G Baker Jr Memorial Fund · Associated Jewish Charities of Baltimore · Peggy & Yale Gordon Charitable Trust · The John J Leidy Foundation Inc · Hecht-Levi Foundation Inc · The Rothschild Charitable Foundation Inc · Alvin and Louise Myerberg Family Foundation · The Henry and Ruth Blaustein Rosenberg Foundation Inc · Dr Frank C Marino Foundation 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 Arthur F and Isadora Dellheim Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from The Arthur F and Isadora Dellheim Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 80%0%1%3%5%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 9%
  • Hias Inc: 88% of income from government
  • Johns Hopkins University: 12% of income from government
  • The Maryland Food Bank Inc: 11% of income from government
  • Baltimore Symphony Orchestra Inc: 11% of income from government
  • Shriver Hall Concert Series Inc: 9% of income from government
  • Baltimore Museum of Art: 4% of income from government
  • Chesapeake Bay Foundation Inc: 2% of income from government
  • Jewish Museum of Maryland Inc: 2% of income from government
  • St John's College: 2% of income from government
  • Goucher College: 0% of income from government
no gov moneyreceives it· size = income
8get no government money at all
5report government grants on their 990 we could not trace to a source (not plotted)
1rely 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.

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 95 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 Arthur F and Isadora Dellheim’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