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· Private foundation

The Thomas F & Clementine L Mullan 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.

$397k
Granted FY2025still arriving
46
Grants FY2025still arriving
8
States reached
$60k
Largest
01What it funds
0196% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2019 to 2025.

Education$1.0MHealth$518kRecreation & Sports$339kReligion$161kArts & Culture$145kHuman Services$116kYouth Development$93kPhilanthropy$46kOther$0
02FY2025 · 46 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k31 grants · $59k
  • $10k–50k14 grants · $278k
  • $50k–250k1 grant · $60k
$3,000
Median grant
8
States reached
$7.6M
Total assets
Largest grants
RecipientAmount
NATIONAL SPORTING LIBRARY AND MUSEUM$60,000
JOHNS HOPKINS UNIVERSITY$42,333
SAINT IGNATIUS LOYOLA ACADEMY$36,000
ST ALBANS SCHOOL$25,000
UM ST JOSEPH MEDICAL CENTER FOUNDATION$25,000
BOY'S LATIN SCHOOL$24,650
SAINT PAUL'S SCHOOLS$20,000
CRISTO REY JESUIT HIGH SCHOOL$20,000
THE WENDT CENTER FOR LOSS AND HEALING$20,000
RUBICON PRODUCTIONS$15,000
THE MOUNT VERNON LADIES' ASSOC$10,150
WINDSOR CHARITABLE FOUNDATION$10,000
KENT ASSOCIATION OF RIDING THERAPY$10,000
CATHEDRAL OF MARY OUR QUEEN$10,000
CALVERT SCHOOL$10,000
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 (FY21–25, $5k) land where the poverty rate runs at 16%, against an area that typically sits at 11%. 100% 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 Y OF CENTRAL MARYLAND: $1k → 11%THE Y OF CENTRAL MARYLAND: $1k → 11%RONALD MCDONALD HOUSE: $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

ME
IL
NY
MA
IA
PA
CT
VA
MD
DE
NC
SC
DC
LA
GA
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.

93%of every dollar goes to organizations it has funded before.
$2.4M · 58 repeat orgs$176k to everyone else

Grantees it renews have grown median revenue +34% since the first grant, against +13% for those funded once.

58 repeat relationships: 34 still active in FY2025, 24 since wound down; 12 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

58
54

Total granted

$2.4M
$132k

Median revenue growth · since first grant

+34%
+13%

Still filing today

53%
44%

New vs renewed · share of each year

In FY2025, 89% of grant dollars renewed an existing relationship; $44k went to new ones.

50%100%’19’20’21’22’23’24’25
RenewedFirst-time

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

’19’20’21’22’23’24’25
EducationHealthArts & CultureEnvironmentPublic BenefitPhilanthropyOther
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

  • TN
    THE NATIONAL SPORTING LIBRARY AND MUSEUM
    7× · 2019–2025 · $291k · revenue +24%
  • JOHNS HOPKINS UNIVERSITY
    5× · 2020–2025 · $240k · revenue +42%
  • GH
    GILCHRIST HOSPICE CARE INC
    4× · 2019–2024 · $72k · revenue +52%

Funded once

  • FM
    FIRST MILE STABLE CHARITABLE FOUNDATION
    one grant, 2019 · $15k
  • MH
    MARYLAND HORSE FOUNDATION INC
    one grant, 2021 · $10k · revenue -89%
  • TV
    THE VALLEYS PLANNING COUNCIL INCgraduated
    one grant, 2023 · $10k · revenue +26%
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
Maryland Institute

Degree granting college-maryland institute college of art is a private college dedicated to the education of professional artists and the further advancement of art in the community.

Education
2
Blackbird Laboratories Inc

Blackbird laboratories is an independent nonprofit medical research organization based in baltimore that is focused on conducting medical and scientific research in conjunction with nonprofit hospitals and academic institutions,…

Health
3
Marymount University

Marymount is a nationally ranked comprehensive catholic university, guided by the traditions of the religious of the sacred heart of mary, that emphasizes intellectual curiosity, service to others, and a global perspective. a marymount…

—
4
Chesapeake Bay Trust

Chesapeake bay trust is a public, nonprofit grant-making organization created to promote public awareness of and participation in the restoration and protection of the chesapeake bay and its tributaries. (see schedule o for continuation)…

—
5
Baltimore Yearly Meeting of the Religious Society of Friends Inc

Promote religious, charitable, and educational interests of its members and constituent monthly meetings.

Religion
6
University of Baltimore Foundation Inc

To raise and manage funds and to provide financial support to the university of baltimore. the foundation provides leadership, guidance, and support to the university's administration in advancing the mission and vision of the university.

Education
7
The Maryland School for the Blind

As a statewide resource center, the school provides outreach, educational and residential services for students to reach their fullest potential by preparing them to be as successful, independent, and well-rounded contributing members of…

Education
8
The Holton Arms School

The mission of the holton-arms school is to cultivate the unique potential of young women through the "education not only of the mind, but of the soul and spirit".

Education
9
Cfa Society Baltimore Inc

The cfa society baltimore, inc. was founded in 1948. the cfa society baltimore, inc. was established to provide the financial community with information and knowledge, while advocating ethical conduct with regard to investments and…

—
10
Baltimore Tree Trust Inc

To restore baltimore's urban forest through increased tree planting, community engagement, and advocacy.

Environment
11
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…

—
12
CalvertHealth Medical Center Inc

Calverthealth medical center provides quality inpatient and ambulatory health care to the people of southern maryland that is accessible, cost-effective and compassionate. chmc works in partnership with the community to improve the health…

Health
How this is measured
The grantee most central to the portfolio’s shape is Gbmc Foundation Inc; the most unlike its peers is The Herget Foundation. 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

63 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. 63 of the 125 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)
13
Early backer (in before they grew)
61/63
Grantees still filing
42/63
Grew since first funded

Where the money sits, by cause and then by grantee

SAINT IGNATIUS LOYOLA ACADEMY: $234,500 · OtherSAINT IGNATIUS LOYOLA ACADEMYCRISTO REY JESUIT HIGH SCHOOL: $152,500 · OtherCRISTO REY JESUIT HIGH SCHOOLUM ST JOSEPH MEDICAL CENTER FOUNDATION: $150,200 · OtherUM ST JOSEPH MEDICAL CENTER FOUNDATIONCATHEDRAL OF MARY OUR QUEEN: $135,000 · OtherCATHEDRAL OF MARY OUR QUEENSAINT PAUL'S SCHOOL FOR BOYS: $100,000 · OtherSAINT PAUL'S SCHOOL FOR BOYSNATIONAL WW II MUSEUM: $75,000 · OtherGILCHRIST HOSPICE CARE INC: $71,500 · OtherGB Charities Inc: $68,000 · OtherPROTESTANT EPISCOPAL CATHEDRAL FOUNDATION OF THE D OF C: $57,500 · OtherJOHNS HOPKINS UNIVERSITY MEDICINE: $51,000 · Other+73 more: $362,453 · Other+73 moreTHE NATIONAL SPORTING LIBRARY AND MUSEUM: $291,000 · EducationTHE NATIONAL SPORTING LIBRARY AND …JOHNS HOPKINS UNIVERSITY: $240,000 · EducationJOHNS HOPKINS UNIVERSITYTHE BOYS' LATIN SCHOOL OF MARYLAND INC: $79,090 · EducationTHE BOYS' LATIN SCHOOL OF MARYLAND…MCDONOGH SCHOOL INCORPORATED: $50,000 · EducationMCDONOGH SCHOOL INCORPORATEDTHE WINDSOR CHARITABLE FOUNDATION: $46,100 · EducationTHE WINDSOR CHARITABLE FOUNDATIONSALISBURY UNIVERSITY FOUNDATION INC: $30,000 · Education+7 more: $42,900 · Education+7 moreINDIAN RIVER HOSPITAL FOUNDATION INC: $135,000 · HealthTHE JOHNS HOPKINS HOSPITAL: $40,500 · HealthRETT SYNDROME RESEARCH TRUST INC: $7,000 · Health+4 more: $5,900 · HealthRUBICON PRODUCTIONS INC: $25,000 · Arts & CultureB&O RAILROAD MUSEUM INC: $19,500 · Arts & CultureBALLET VERO BEACH INC: $12,000 · Arts & CultureMARYLAND HISTORICAL SOCIETY INC: $6,000 · Arts & Culture+3 more: $3,100 · Arts & CultureQUAIL VALLEY CHARITIES INC: $35,500 · Philanthropy+3 more: $1,350 · PhilanthropyLAND PRESERVATION TRUST INC: $8,000 · EnvironmentOCEAN RESEARCH & CONSERVATION ASSOCIATION INC: $6,000 · EnvironmentIRVINE NATURAL SCIENCE CENTER INC: $1,500 · EnvironmentTHE MANOR CONSERVANCY INC: $700 · Environment+3 more: $500 · EnvironmentCAESAR RODNEY INSTITUTE: $10,000 · Public BenefitCHRISTOPHER COFFLAND MEMORIAL FUND INC: $5,000 · Public BenefitWreaths Across America: $900 · Public Benefit+1 more: $500 · Public Benefit
Other$1,457,653Education$779,090Health$188,400Arts & Culture$65,600Philanthropy$36,850Environment$16,700Public Benefit$16,400

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 budgetTHE NATIONAL SPORTING LIBRARY AND MUSEUM: $291,000 over 7y, 1.9% of budgetJOHNS HOPKINS UNIVERSITY: $240,000 over 5y, 0.0% of budgetTHE BOYS' LATIN SCHOOL OF MARYLAND INC: $79,090 over 4y, 0.1% of budgetGILCHRIST HOSPICE CARE INC: $71,500 over 4y, 0.0% of budgetGB Charities Inc: $68,000 over 7y, 5.3% of budgetMCDONOGH SCHOOL INCORPORATED: $50,000 over 3y, 0.0% of budgetTHE WINDSOR CHARITABLE FOUNDATION: $46,100 over 5y, 2.8% of budgetTHE JOHNS HOPKINS HOSPITAL: $40,500 over 3y, 0.0% of budgetQUAIL VALLEY CHARITIES INC: $35,500 over 6y, 0.7% of budgetSALISBURY UNIVERSITY FOUNDATION INC: $30,000 over 3y, 0.1% of budgetLITTLE SISTERS OF JESUS AND MARY INC: $30,000 over 3y, 1.1% of budgetRUBICON PRODUCTIONS INC: $25,000 over 2y, 1.3% of budgetWILLIAM WENDT CENTER FOR LOSS AND HEALING: $22,500 over 2y, 0.3% of budgetB&O RAILROAD MUSEUM INC: $19,500 over 6y, 0.1% of budgetCALVERT SCHOOL INCORPORATED: $16,000 over 3y, 0.0% of budgetBALTIMORE EDUCATIONAL SCHOLARSHIP TRUST: $15,000 over 6y, 0.3% of budgetBALLET VERO BEACH INC: $12,000 over 3y, 0.3% of budgetMARYLAND HORSE FOUNDATION INC: $10,000 over 1y, 0.7% of budgetTHE VALLEYS PLANNING COUNCIL INC: $10,000 over 1y, 2.0% of budgetTHE BOYS AND GIRLS CLUBS OF METROPOLITAN BALTIMORE: $10,000 over 1y, 0.0% of budgetCAESAR RODNEY INSTITUTE: $10,000 over 1y, 2.1% of budgetST MICHAELS FIRE DEPARTMENT INC: $9,000 over 5y, 0.3% of budgetLAND PRESERVATION TRUST INC: $8,000 over 6y, 0.1% of budgetRETT SYNDROME RESEARCH TRUST INC: $7,000 over 5y, 0.0% of budgetMARYLAND HISTORICAL SOCIETY INC: $6,000 over 3y, 0.1% of budgetOCEAN RESEARCH & CONSERVATION ASSOCIATION INC: $6,000 over 6y, 0.1% of budgetFIRST FRUITS FARM INC: $5,000 over 1y, 0.2% of budgetSAINT JAMES SCHOOL: $5,000 over 1y, 0.0% of budgetCHRISTOPHER COFFLAND MEMORIAL FUND INC: $5,000 over 1y, 0.4% of budgetSCHOLARSHIP FOUNDATION OF INDIAN RIVER COUNTY INC: $3,000 over 2y, 0.1% of budgetTHE EDUCATION FOUNDATION OF INDIAN RIVER COUNTY INC: $3,000 over 2y, 0.3% of budgetTHE ZACHARY T PAFF FOUNDATION INC: $3,000 over 2y, 5.0% of budgetCARDINAL CREASE CLUB FOUNDATION INC: $2,400 over 1y, 2.5% of budgetYoung Men's Christian Association of Central Maryland Inc: $2,000 over 2y, 0.0% of budgetBALTIMORE CHORAL ARTS SOCIETY INC: $2,000 over 2y, 0.1% of budgetTHE FAMILY TREE INC: $1,500 over 2y, 0.0% of budgetIRVINE NATURAL SCIENCE CENTER INC: $1,500 over 1y, 0.1% of budgetWashington Winter Show Inc: $1,150 over 1y, 0.9% of budgetARTS FOR LEARNING MARYLAND INC: $1,000 over 1y, 0.0% of budgetTHE HIGHLANDS SCHOOL INC: $1,000 over 1y, 0.0% of budgetWreaths Across America: $900 over 5y, 0.0% of budgetTHE MANOR CONSERVANCY INC: $700 over 2y, 0.5% of budgetHEREFORD VOLUNTEER AMBULANCE ASSOC INC DBA MONKTON VOL EMERGENCY SERVICES: $700 over 7y, 0.1% of budgetTHE HERGET FOUNDATION: $500 over 1y, 0.0% of budgetBLAKEHURST RESIDENTS SCHOLARSHIP FOUNDATION INC: $500 over 1y, 0.2% of budgetMETRO-MARYLAND YOUTH FOR CHRIST INC: $500 over 1y, 0.0% of budgetBROOKGREEN GARDENS: $200 over 1y, 0.0% of budgetINDIAN RIVER LAND TRUST INC: $200 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 THE NATIONAL SPORTING LIBRARY AND MUSEUM ↗
  • Who funds JOHNS HOPKINS UNIVERSITY ↗
  • Who funds INDIAN RIVER HOSPITAL FOUNDATION INC ↗
  • Who funds THE BOYS' LATIN SCHOOL OF MARYLAND INC ↗
  • Who funds GILCHRIST HOSPICE CARE INC ↗
  • Who funds GB Charities Inc ↗
  • Who funds MCDONOGH SCHOOL INCORPORATED ↗
  • Who funds THE WINDSOR CHARITABLE FOUNDATION ↗
  • Who funds THE JOHNS HOPKINS HOSPITAL ↗
  • Who funds QUAIL VALLEY CHARITIES INC ↗
  • Who funds SALISBURY UNIVERSITY FOUNDATION INC ↗
  • Who funds LITTLE SISTERS OF JESUS AND MARY INC ↗
  • Who funds RUBICON PRODUCTIONS INC ↗
  • Who funds WILLIAM WENDT CENTER FOR LOSS AND HEALING ↗
  • Who funds B&O RAILROAD MUSEUM INC ↗
  • Who funds CALVERT SCHOOL INCORPORATED ↗
  • Who funds BALTIMORE EDUCATIONAL SCHOLARSHIP TRUST ↗
  • Who funds BALLET VERO BEACH INC ↗
  • Who funds MARYLAND HORSE FOUNDATION INC ↗
  • Who funds THE VALLEYS PLANNING COUNCIL INC ↗
  • Who funds THE BOYS AND GIRLS CLUBS OF METROPOLITAN BALTIMORE ↗
  • Who funds CAESAR RODNEY INSTITUTE ↗
  • Who funds KENT ASSOCIATION OF RIDING THERAPY INC ↗
  • Who funds ST MICHAELS FIRE DEPARTMENT 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 Foundation IncMD46.1× affinity22 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 · Brown Advisory Charitable Foundation Inc · The United Way of Central Maryland Inc · The Marion I & Henry J Knott Foundation Inc · France-Merrick Foundation Inc · The Bunting Family Foundation · The Thomas B and Elizabeth M Sheridan Foundation Inc · The Charles T Bauer Charitable Foundation · Mary Jean and Oliver Travers Foundation Inc · Campbell Foundation Inc · The Kahlert 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 Thomas F & Clementine L Mullan Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from The Thomas F & Clementine L Mullan Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 250%6%25%56%100%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 2%
  • Land Preservation Trust Inc: 64% of income from government
  • First Fruits Farm Inc: 26% of income from government
  • Young Men's Christian Association of Central Maryland Inc: 22% of income from government
  • Johns Hopkins University: 12% of income from government
  • Maryland Historical Society Inc: 9% of income from government
  • The Family Tree Inc: 9% of income from government
  • B&o Railroad Museum Inc: 7% of income from government
  • The Shriners' Hospital for Children: 6% of income from government
  • The Boys and Girls Clubs of Metropolitan Baltimore: 2% of income from government
  • Chesapeake Bay Foundation Inc: 2% of income from government
  • Waterfront Partnership of Baltimore Inc: 2% of income from government
  • The United Way of Central Maryland Inc: 2% of income from government
  • Arts for Learning Maryland Inc: 1% of income from government
  • Salisbury University Foundation Inc: 0% of income from government
  • Indian River Land Trust Inc: 0% of income from government
  • Gilchrist Hospice Care Inc: 0% of income from government
  • Ballet Vero Beach Inc: 0% of income from government
  • The Johns Hopkins Hospital: 0% of income from government
  • Mcdonogh School Incorporated: 0% of income from government
no gov moneyreceives it· size = income
25get no government money at all
8report 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.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to The Thomas F & Clementine L Mullan Foundation Inc?

Find your warmest path to The Thomas F & Clementine L Mullan 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 125 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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