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Foundation DossiersMostly funded, not a grantmaker — see who funds it →
Plinth

· Public charity

The Marfan Foundation Inc

See schedule o.the marfan foundation drives research, education and support and builds community to improve outcomes, save lives and empower all people to thrive who are living with marfan, loeys-dietz, vascular ehlers-danlos syndromes, and related genetic aortic and vascular conditions.

$1.5M
Granted FY2025still arriving
6
Grants FY2025still arriving
5
States reached
$370k
Largest
01What you fundRead
02The needRead
03Your edgeRead
04Your fieldRead
01What you fund
01100% classified

What you funded, over time

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

Health$5.8MScience & Tech$1.4MEducation$685kYouth Development$100k
02FY2025 · 6 grants

Where the money goes

Your grants by size, and where they go.

The 6 grants below total $1,045,000 — the rows itemised in this filing. The $1,529,718 headline is the total grant expense reported on the return, so the remaining $484,718 is giving the schedule does not break out: grants under the $5,000 itemisation floor, grants to individuals, and grants reported on other schedules. Every figure below describes the itemised rows only.

By grant size · FY2025

  • $10k–50k1 grant · $10k
  • $50k–250k3 grants · $300k
  • $250k+2 grants · $735k
$100,000
Median grant
5
States reached
$20M
Total assets
Largest grants
RecipientAmount
STANFORD UNIVERSITY SCHOOL OF MEDICINE$370,000
JOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE$365,000
YALE UNIVERSITY$100,000
ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI$100,000
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA - LOS ANGELES$100,000
LYON FAMILY FOUNDATION$10,000
02The need
03

Do your dollars go where the need is?

Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.

show:

Dollar for dollar, your grants (FY17–25) land where the poverty rate runs at 16%, against an area that typically sits at 11%. 86% of your dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.

area typical 11%BRIGHAM & WOMENS HOSPITAL: $100k → 16%MAYO CLINIC ROCHESTER: $40k → 9%UNIVERSITY OF PITTSBURGH: $100k → 11%Trustees Of The University Of Pennsylvania: $77k → 22%BOARD OF TRUSTEES OF THE LELAND STANDFORD JUNIOR UNIVERSITY: $50k → 8%THE REGENTS OF THE UNIVERSITY OF CALIFORNIA - LOS ANGELES: $100k → 14%NEW YORK INSTITUTE OF OF TECHNOLOGY: $100k → 6%NYU GROSSMAN SCHOOL OF MEDICINE: $100k → 17%BAYLOR COLLEGE OF MEDICINE: $212k → 16%UNIVERSITY OF IOWA: $100k → 15%washington University: $102k → 21%YALE UNIVERSITY: $100k → 12%DUKE UNIVERSITY: $220k → 11%WOMEN & INFANTS HOSPITAL OF RHODE ISAND: $75k → 14%EMORY UNIVERSITY: $42k → 14%INDIANA UNIVERSITY: $75k → 18%THE ARNOLD P GOLD FOUNDATION: $101k → 7%RUTGERS UNIVERSITY NEW BRUNSWICK: $100k → 8%JOHNS HOPKINS SCHOOL OF MEDICINE: $501k → 19%TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA: $40k → 22%NYU School Of Medicine: $50k → 17%UNIVERSITY OF TEXAS HEALTH SCIENCE CENTER AT HOUSTON: $175k → 16%WASHINGTON UNIVERSITY OF ST LOUIS: $101k → 21%JOHNS HOPKINS SCHOOL OF MEDICINE: $403k → 19%BAYLOR COLLEGE OF MEDICINE: $132k → 16%WASHINGTON UNIVERSITY: $100k → 21%JOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE: $365k → 19%STANFORD UNIVERSITY SCHOOL OF MEDICINE: $370k → 8%WEILL MEDICAL COLLEGE OF CORNELL UNIVERSITY: $50k → 17%BAYLOR COLLEGE OF MEDICINE: $100k → 16%WASHINGTON UNIVERSITY OF ST LOUIS: $100k → 21%JOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE: $351k → 19%MASSACHUSETTS GENERAL: $50k → 16%BAYLOR COLLEGE OF MEDICINE: $84k → 16%WASHINGTON UNIVERSITY OF ST LOUIS: $100k → 21%JOHNS HOPKINS SCHOOL OF MEDICINE: $339k → 19%Massachusetts General: $50k → 16%BAYLOR COLLEGE OF MEDICINE: $61k → 16%JOHNS HOPKINS SCHOOL OF MEDICINE: $288k → 19%BAYLOR COLLEGE OF MEDICINE: $60k → 16%JOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE: $250k → 19%BAYLOR COLLEGE OF MEDICINE: $51k → 16%JOHNS HOPKINS SCHOOL OF MEDICINE: $246k → 19%HOSPTIAL FOR SPECIAL SURGERY: $100k → 17%JOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE: $201k → 19%ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $100k → 17%Icahn School Of Medicine Of Mount Sinai: $75k → 17%ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $75k → 17%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount

Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.

Which US states your grants reach

MN
IL
WI
NY
MA
IA
IN
OH
PA
NJ
CT
RI
CA
MO
KY
MD
NC
GA
TX

Grants abroad, by region — $471k on the FY2025 return

Schedule F, as filed: 1 region. The IRS asks for region and purpose, not the recipient, so no country or grantee can be named here.

Europe (including Iceland and Greenland)$471k · 100% · 3 grants

Stated purpose: RESEARCH

US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving. Grants abroad on Schedule F are filed by region, purpose and amount with no recipient name, so they are shown by region and cannot be placed on the country map or matched to a grantee.

03Your edge
repeat funding

Who you back again

Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.

84%of every dollar goes to organizations you’ve funded before.
$6.4M · 19 repeat orgs$1.2M to everyone else

And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +61% since the first grant, against +11% for the ones you funded once.

19 repeat relationships — 3 still active in FY2025, 16 since wound down; 2 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

19
17

Total granted

$6.4M
$1.1M

Median revenue growth · since first grant

+61%
+11%

Still filing today

68%
53%

New vs renewed · share of each year

In FY2025, 88% of grant dollars renewed an existing relationship; $110k 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
EducationHealthScience & TechOther

First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). 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 · $2.9M · revenue +64%
  • BC
    Baylor College of Medicine
    7× · 2017–2024 · $700k · revenue +67%
  • SH
    STANFORD HEALTH CARE
    2× · 2019–2025 · $377k · revenue +70%

Funded once

  • NY
    NEW YORK INSTITUTE OF TECHNOLOGY
    one grant, 2020 · $100k · revenue +23%
  • MG
    MASS GENERAL BRIGHAM INCORPORATED
    one grant, 2022 · $100k
  • NY
    NEW YORK SOCIETY FOR THE RELIEF OF THE RUPTURED AND CRIPPLED MAINTAINING THE
    one grant, 2024 · $100k · revenue 0%

Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.

04Your field

The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.

1
University of Minnesota Physicians

University of minnesota physicians serves as the integrated group practice for the university of minnesota medical school full-time faculty to provide the highest quality healthcare to patients and their families.university of minnesota…

Health
2
University of Southern California

The central mission of the university of southern california is the development of human beings and society as a whole through the cultivation and enrichment of the human mind and spirit. the principal means by which our mission is…

Education
3
University of Miami

See Form 990, Part I, Line 1, Description of Organization Mission.

Education
4
Drexel University

Drexel university fulfills its founder's vision of preparing each new generation of students for productive professional and civic lives while also focusing its collective expertise on solving society's greatest problems. drexel is an…

Education
5
The Johns Hopkins Hospital

For more than 125 years, the mission of the johns hopkins hospital has been to lead the world in the diagnosis and treatment of disease and to train tomorrow's great physicians, nurses and scientists. above all, we aim to provide the…

Health
6
Thomas Jefferson University

Thomas jefferson university ("tju") is a comprehensive university with preeminence in transdisciplinary, experiential professional education, research and discovery, delivering exceptional value for the 21st century students with…

Education
7
Rush University Medical Center

The mission of Rush is to improve the health of the individuals and diverse communities we serve through the integration of outstanding patient care, education, research and community partnerships.

Health
8
Mass General Brigham Incorporated & Affiliates Group Return

Mass general brigham incorporated is developing an integrated health care delivery system throughout the region that offers patients a continuum of coordinated, high-quality care.

Health
9
Truman Medical Center Incorporated

University health is an academic health center providing accessible, state-of-the-art quality healthcare to our community regardless of the ability to pay.

Health
10
Southern California University of Health Sciences

The mission of southern california university of health sciences (scu) is to educate students as competent, caring and successful practitioners of integrative healthcare. the university is committed to providing excellence in academics,…

Education
11
Fred Hutchinson Cancer Center

Fred hutch cancer center ("fred hutch") unites innovative research and compassionate care to prevent and eliminate cancer and infectious disease. continued on schedule o

Health
12
Cornell University

Education, research, medical services and other public services.

Education

For reference, the grantee most central to the portfolio’s shape is Trustees of Boston University and the most unlike its peers is Positive Exposure Productions Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.

Your grantees are a median of 67 years old; the field is 16. You back the established end — and your money leans older still.

THE FIELDby orgYOUR GRANTEESby number22%0%<5yr14%4%5–10yr19%14%10–20yr16%14%20–35yr13%7%35–55yr16%61%55yr+
THE FIELDby orgYOUR MONEYby value22%0%<5yr14%2%5–10yr19%6%10–20yr16%2%20–35yr13%4%35–55yr16%87%55yr+

The field is 22% startups (under 5 years old) — 0% of your grantees by number, and just 0% of your money.

Closures · last 5 years

The orgs you fund almost never close — 0.0% lost their exemption, against 13% of the field you don’t fund.

orgs you fund
0.0%0/42
the rest of the field
13%
240,396/1,819,523

Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.

04the grantee network

26 grantees tracked through their own filings, 2017–2025.

Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.

Counted here: distinct organizations you funded across 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 26 of the 42 grantees resolved in that span have returns of their own we could reconcile; the rest are funded organizations whose filings we could not track year by year.

0
Load-bearing (≥25% of a budget)
0
Early backer (in before they grew)
26/26
Grantees still filing
22/26
Grew since you first funded

Where your money sits — by cause, then by grantee

JOHNS HOPKINS UNIVERSITY — $2,943,593 · EducationJOHNS HOPKINS UNIVERSITYBaylor College of Medicine — $700,185 · EducationBaylor College of MedicineDUKE UNIVERSITY — $295,000 · EducationDUKE UNIVERSITYICAHN SCHOOL OF MEDICINE AT MOUNT SINAI — $275,000 · EducationWASHINGTON UNIVERSITY — $202,570 · Education+10 more — $830,404 · Education+10 moreWASHINGTON UNIVERSITY OF ST LOUIS — $300,815 · OtherWASHINGTON UNIVERSITY OF …UNIVERSITY OF TEXAS HEALTH SCIENCE CENTER HOUSTON — $200,000 · OtherUNIVERSITY OF TEXAS HEALT…THE ARNOLD GOLD FOUNDATION — $175,900 · OtherTHE ARNOLD GOLD FOUNDATIO…Weill Medical College of Cornell Univers — $158,900 · OtherWeill Medical College of …UNIVERSITY OF CALIFORNIA SAN FRANCISCO — $100,000 · OtherUNIVERSITY OF CALIFORNIA …MASS GENERAL BRIGHAM INCORPORATED — $100,000 · OtherMASS GENERAL BRIGHAM INCO…REGENTS UNIV OF CALIFORNIA — $100,000 · OtherREGENTS UNIV OF CALIFORNI…RUTGERS THE STATE UNIVERSITY — $100,000 · OtherRUTGERS THE STATE UNIVERS…NEW YORK UNIVERSITY SCHOOL OF MEDICINE — $100,000 · OtherNEW YORK UNIVERSITY SCHOO…State University of Iowa — $100,000 · OtherState University of IowaMASS GENERAL BRIGHAM INCORPORATED — $100,000 · OtherMASS GENERAL BRIGHAM INCO…TRUSTEES OF BOSTON UNIVERSITY — $75,000 · OtherIndiana University School of Medicine — $75,000 · OtherUNIVERSITY OF WISCONSIN — $75,000 · Other+4 more — $55,000 · OtherSTANFORD HEALTH CARE — $377,200 · HealthSTANFORD HEAL…MAYO CLINIC — $136,950 · HealthMAYO CLINICWOMEN & INFANTS HOSPITAL OF RI — $100,000 · HealthWOMEN & INFAN…NEW YORK SOCIETY FOR THE RELIEF OF THE RUPTURED AND CRIPPLED MAINTAINING THE — $100,000 · HealthNEW YORK SOCI…THE CLEVELAND CLINIC FOUNDATION GROUP RETURN — $100,000 · HealthTHE CLEVELAND…THE CLEVELAND CLINIC FOUNDATION — $100,000 · HealthTHE CLEVELAND…+2 more — $22,195 · HealthAMERICAN SOCIETY FOR MATRIX BIOLOGY — $5,938 · Science & Tech
Education$5,246,752Other$1,815,615Health$936,345Science & Tech$5,938

Each org by its size and your share of it — top-left is where you’re load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ your share of their budgetJOHNS HOPKINS UNIVERSITY — $2,943,593 over 9y, 0.0% of budgetBaylor College of Medicine — $700,185 over 7y, 0.0% of budgetSTANFORD HEALTH CARE — $377,200 over 2y, 0.0% of budgetDUKE UNIVERSITY — $295,000 over 3y, 0.0% of budgetICAHN SCHOOL OF MEDICINE AT MOUNT SINAI — $275,000 over 4y, 0.0% of budgetWASHINGTON UNIVERSITY — $202,570 over 2y, 0.0% of budgetTHE ARNOLD GOLD FOUNDATION — $175,900 over 7y, 3.4% of budgetMAYO CLINIC — $136,950 over 8y, 0.0% of budgetTRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA — $116,500 over 2y, 0.0% of budgetWOMEN & INFANTS HOSPITAL OF RI — $100,000 over 2y, 0.0% of budgetTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY — $100,000 over 3y, 0.0% of budgetNEW YORK SOCIETY FOR THE RELIEF OF THE RUPTURED AND CRIPPLED MAINTAINING THE — $100,000 over 1y, 0.0% of budgetUNIVERSITY OF PITTSBURGH — $100,000 over 1y, 0.0% of budgetUniversity of Kentucky Research Foundation — $100,000 over 1y, 0.0% of budgetTHE CLEVELAND CLINIC FOUNDATION GROUP RETURN — $100,000 over 1y, 0.0% of budgetTHE CLEVELAND CLINIC FOUNDATION — $100,000 over 3y, 0.0% of budgetYale University — $100,000 over 1y, 0.0% of budgetNew York University — $76,404 over 2y, 0.0% of budgetTRUSTEES OF BOSTON UNIVERSITY — $75,000 over 2y, 0.0% of budgetEmory University — $66,792 over 2y, 0.0% of budgetMidwestern University — $37,500 over 1y, 0.0% of budgetCASE WESTERN RESERVE UNIVERSITY — $33,208 over 2y, 0.0% of budgetBETH ISRAEL DEACONESS MEDICAL CENTER INC — $17,195 over 1y, 0.0% of budgetAMERICAN SOCIETY FOR MATRIX BIOLOGY — $5,938 over 1y, 4.9% of budgetPOSITIVE EXPOSURE PRODUCTIONS INC — $5,000 over 1y, 0.7% of budget
Go grantee by grantee — a decade per org, and how each moved after you funded them

A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.

The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.

The Trustees of Colum…Renaissance Charitabl…National Philanthropi…Morgan Stanley Global…Vanguard Charitable E…American Online Givin…Donor Advised Charita…Fidelity Investments …Amazonsmile Foundation
The Trustees of Columbia University in the City of New YorkNY13.4× affinity4 shared granteesties to 8 of 8Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Trustees of Columbia University in the City of New York · Renaissance Charitable Foundation Inc · National Philanthropic Trust · Morgan Stanley Global Impact Funding Trust Inc · Vanguard Charitable Endowment Program · American Online Giving Foundation Inc · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile Foundation

Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.

Government reliance of your grantees

Every dot is one organization The Marfan Foundation Inc funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal, a single department, or state — and drag the year to watch it move.

2024
’20’21’22’23’24’25
no gov · 20%0%1%3%5%your share of their income ↑0%23%45%68%90%share of the org’s income from government →median 12%
  • Trustees of Boston University — 12% of income from government
  • Johns Hopkins University — 12% of income from government
  • Yale University — 12% of income from government
  • Beth Israel Deaconess Medical Center Inc — 6% of income from government
no gov moneyreceives it· size = income
2get no government money at all
3report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–90%
typical government reliance, FY20–25

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 your grant caused the public funding. Coverage is precision-first — a floor, not 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 12–24 months.

On method. Every financial figure here is read directly from IRS e-file XML — your own 990/990-PF and the multi-year returns of the 42 grantees we resolved across every year we hold, several hundred filings in all (a different count from the grant rows on the cover, which are one fiscal year)— each linked to its source. Grantee achievements and outcomes are each organization’s own program-service reporting (Form 990, Part III); we read these as association with sustained funding — the foundation is one of several forces — suppress low-confidence name matches rather than guess, and say so where a figure rests on a single grant or filing. Not everything on this page is a filed figure, and the difference matters. Filed is what you reported on your 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. How we build these →

Generated from your IRS Form 990 e-file return for fiscal year 2025, released 2025. Filings run roughly 12–24 months behind; figures are dated accordingly.

Source object · view filing

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 camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home
State money flows
the interactive map of money crossing state lines