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Middendorf Foundation Inc at a glance

· Private foundation

Middendorf Foundation Inc

Its FY2025 filing reports that it accepted unsolicited grant applications.

$2.8M
Granted FY2025still arriving
2
Grants FY2025still arriving
1
States reached
$2.8M
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0194% classified

What it funded, over time

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

Education$2.6MArts & Culture$1.9MHealth$1.2MHuman Services$655kEnvironment$510kHousing & Shelter$322kFood & Nutrition$299kAnimals$283kOther$0
02FY2025 · 2 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k1 grant · $200
  • $250k+1 grant · $2.8M
$2,762,587
Median grant
1
States reached
$36M
Total assets
Largest grants
RecipientAmount
Individual grant recipient$2,762,587
FOUNDATION FOR BALTIMORE COUNTY PUBLIC LIBRARY$200
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 (FY17–21, $150k) land where the poverty rate runs at 16%, against an area that typically sits at 10%. 83% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%COMMUNITY RESOURCE CENTER: $25k → 14%MARINE CORPS HERITAGE FOUNDATION: $25k → 7%HOUSE OF RUTH MARYLAND: $100k → 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

ID
MA
OR
PA
CT
VA
MD
TN
LA
GA
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.

63%of every dollar goes to organizations it has funded before.
$13M · 19 repeat orgs$7.7M to everyone else

Grantees it renews have grown median revenue +56% since the first grant, against +35% for those funded once.

19 repeat relationships: 1 still active in FY2025, 18 since wound down; 1 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

19
141

Total granted

$13M
$7.7M

Median revenue growth · since first grant

+56%
+35%

Still filing today

53%
57%

New vs renewed · share of each year

In FY2025, 100% of grant dollars renewed an existing relationship; $200 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 & CultureEducationHealthEnvironmentHuman ServicesHousing & ShelterOther
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

  • WC
    WASHINGTON COLLEGE
    3× · 2017–2019 · $280k · revenue +21%
  • BA
    BALTIMORE ANIMAL RESCUE AND CARE SHELTER BARCS
    2× · 2017–2020 · $139k · revenue +56%
  • AF
    ARTS FOR LEARNING MARYLAND INC
    2× · 2018–2021 · $127k · revenue +280%

Funded once

  • WA
    WALTERS ART MUSEUM
    one grant, 2018 · $250k
  • GH
    GBMC HOSPITAL
    one grant, 2017 · $250k
  • GC
    GILCHRIST CENTER OF BALTIMORE
    one grant, 2019 · $250k
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
Baltimore Area Health Education Center

To eliminate health disparities by educating and strengthening the health care workforce. bahec provides interdisciplinary education programs that bridge academic, healthcare, and community settings to transform the health of underserved…

Health
2
Baltimore Montessori Inc

To nurture a love of learning in a small family-like environment by providing an extraordinary and proven montessori public school experience for families in baltimore city.

Education
3
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
4
Maryland Independent College & University Association Inc

Serving the interests of independent higher education and supporting the work of campus leaders throughout the state of maryland.

—
5
Baltimore Corps Inc

To cultivate career advancement opportunities for local talent, facilitate talent acquisition for local employers, increase access to capital for local entrepreneurs' social ventures, and foster cross-sector collaboration to address city…

Employment
6
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…

—
7
Visit Baltimore Inc

Visit baltimore is the tourism arm of baltimore, responsible for generating incremental economic benefits through attraction of convention and leisure visitors, and works to provide experience for all guests.

—
8
Baltimore Yearly Meeting of the Religious Society of Friends Inc

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

Religion
9
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…

—
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
Healthcare Access Maryland Inc

We are making maryland healthier by connecting residents to insurance and care, educating the community about healthier living, and advocating a more equitable health care system.

Health
12
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
How this is measured
The grantee most central to the portfolio’s shape is Maryland Zoological Society Inc; the most unlike its peers is Partners in Health a Nonprofit Corporation. 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

94 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. 94 of the 161 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)
28
Early backer (in before they grew)
92/94
Grantees still filing
76/94
Grew since first funded

Where the money sits, by cause and then by grantee

Individual grant recipient: $11,200,144 · OtherIndividual grant recipient+102 more: $5,529,554 · Other+102 moreWASHINGTON COLLEGE: $280,000 · EducationFRIENDS SCHOOL OF BALTIMORE INC: $200,000 · EducationSOUTHWEST BALTIMORE CHARTER SCHOOL INC: $125,000 · EducationWYE RIVER UPPER SCHOOL INC: $100,000 · EducationRADCLIFFE CREEK SCHOOL INC: $75,000 · EducationSOUTH BALTIMORE LEARNING CORPORATION: $75,000 · EducationSun Valley Community School Inc: $70,000 · EducationSTEVENSON UNIVERSITY: $50,000 · EducationTHE ODYSSEY SCHOOL INC: $50,000 · Education+7 more: $81,300 · EducationMARYLAND HISTORICAL SOCIETY INC: $150,000 · Arts & CultureARTS FOR LEARNING MARYLAND INC: $127,310 · Arts & CultureBALTIMORE SYMPHONY ORCHESTRA INC: $100,000 · Arts & CultureMARYLAND ACADEMY OF SCIENCES: $75,000 · Arts & CultureCENTER STAGE ASSOCIATES INC: $75,000 · Arts & CultureMARYLAND ART PLACE INC: $50,000 · Arts & CultureTHE BALTIMORE CHILDREN'S MUSEUM INC: $50,000 · Arts & CultureB&O RAILROAD MUSEUM INC: $50,000 · Arts & CultureSOCIETY FOR THE PRESERVATION OF MARYLAND ANTIQUITIES INC: $50,000 · Arts & CultureTHE COMPOUND INC: $50,000 · Arts & CultureHISTORIC HAMPTON INCORPORATED: $50,000 · Arts & Culture+6 more: $77,142 · Arts & CultureTHE UNION MEMORIAL HOSPITAL: $178,000 · HealthUniversity of Maryland Medical System Corporation: $150,000 · HealthSHEPPARD PRATT HEALTH SYSTEM INC: $100,663 · HealthTuerk House Inc: $70,000 · HealthMt Washington Pediatric Hospital Inc: $50,608 · HealthLUMINIS HEALTH ANNE ARUNDEL MEDICAL CENTER INC: $50,000 · HealthBALTIMORE RESEARCH & EDUCATION FOUNDATION INC: $40,500 · HealthLEGACY HEALTH: $35,000 · HealthINTERSECTION OF CHANGE INC: $30,000 · Health+3 more: $71,240 · HealthCHESAPEAKE BAY FOUNDATION INC: $250,000 · EnvironmentIRVINE NATURAL SCIENCE CENTER INC: $100,000 · EnvironmentBALTIMORE TREE TRUST INC: $75,000 · EnvironmentFriends of Patterson Park Inc: $50,000 · EnvironmentTHE HOWARD COUNTY CONSERVANCY INC: $39,000 · EnvironmentCYLBURN ARBORETUM FRIENDS INC: $29,285 · Environment+1 more: $17,000 · EnvironmentBALTIMORE ANIMAL RESCUE AND CARE SHELTER BARCS: $139,270 · AnimalsMARYLAND ZOOLOGICAL SOCIETY INC: $100,000 · AnimalsDAYS END FARM HORSE RESCUE INC: $20,000 · AnimalsST AMBROSE HOUSING AID CENTER INC: $111,747 · Housing & ShelterGOVANS ECUMENICAL DEVELOPMENT CORP: $75,000 · Housing & ShelterHABITAT FOR HUMANITY OF THE CHESAPEAKE INC: $50,000 · Housing & Shelter
Other$16,729,698Education$1,106,300Arts & Culture$904,452Health$776,011Environment$560,285Animals$259,270Housing & Shelter$236,747

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 budgetWASHINGTON COLLEGE: $280,000 over 3y, 0.2% of budgetCHESAPEAKE BAY FOUNDATION INC: $250,000 over 1y, 1.1% of budgetFRIENDS SCHOOL OF BALTIMORE INC: $200,000 over 1y, 0.7% of budgetTHE UNION MEMORIAL HOSPITAL: $178,000 over 1y, 0.0% of budgetMARYLAND HISTORICAL SOCIETY INC: $150,000 over 1y, 2.8% of budgetUniversity of Maryland Medical System Corporation: $150,000 over 1y, 0.0% of budgetBALTIMORE ANIMAL RESCUE AND CARE SHELTER BARCS: $139,270 over 2y, 1.5% of budgetARTS FOR LEARNING MARYLAND INC: $127,310 over 2y, 1.1% of budgetSOUTHWEST BALTIMORE CHARTER SCHOOL INC: $125,000 over 2y, 2.1% of budgetST AMBROSE HOUSING AID CENTER INC: $111,747 over 1y, 2.9% of budgetSHEPPARD PRATT HEALTH SYSTEM INC: $100,663 over 1y, 0.0% of budgetWYE RIVER UPPER SCHOOL INC: $100,000 over 1y, 5.1% of budgetBALTIMORE SYMPHONY ORCHESTRA INC: $100,000 over 1y, 0.4% of budgetMARYLAND ZOOLOGICAL SOCIETY INC: $100,000 over 1y, 0.3% of budgetTHE HOUSE OF RUTH MARYLAND INC: $100,000 over 1y, 1.1% of budgetIRVINE NATURAL SCIENCE CENTER INC: $100,000 over 1y, 4.3% of budgetMANNA HOUSE INC: $90,000 over 1y, 5.9% of budgetMARYLAND ACADEMY OF SCIENCES: $75,000 over 1y, 1.0% of budgetRADCLIFFE CREEK SCHOOL INC: $75,000 over 1y, 2.6% of budgetSOUTH BALTIMORE LEARNING CORPORATION: $75,000 over 1y, 3.8% of budgetCENTER STAGE ASSOCIATES INC: $75,000 over 1y, 0.8% of budgetGOVANS ECUMENICAL DEVELOPMENT CORP: $75,000 over 1y, 3.3% of budgetTuerk House Inc: $70,000 over 1y, 0.5% of budgetMEALS ON WHEELS OF CENTRAL MARYLANDINC: $70,000 over 1y, 0.7% of budgetSun Valley Community School Inc: $70,000 over 3y, 0.3% of budgetCAROLINE CENTER INC: $65,000 over 1y, 0.9% of budgetThe Loading Dock Inc: $60,000 over 1y, 4.3% of budgetThe William S Baer School: $60,000 over 1y, 20% of budgetFIRST FRUITS FARM INC: $50,852 over 1y, 2.3% of budgetMt Washington Pediatric Hospital Inc: $50,608 over 1y, 0.1% of budgetMARYLAND ART PLACE INC: $50,000 over 2y, 13% of budgetTHE BALTIMORE CHILDREN'S MUSEUM INC: $50,000 over 1y, 1.2% of budgetFriends of Patterson Park Inc: $50,000 over 1y, 7.7% of budgetNEXT ONE UP FOUNDATION INC: $50,000 over 1y, 4.1% of budgetB&O RAILROAD MUSEUM INC: $50,000 over 1y, 1.1% of budgetSOCIETY FOR THE PRESERVATION OF MARYLAND ANTIQUITIES INC: $50,000 over 1y, 7.0% of budgetTHE COMPOUND INC: $50,000 over 1y, 9.2% of budgetTHE MARYLAND FOOD BANK INC: $50,000 over 1y, 0.1% of budgetLUMINIS HEALTH ANNE ARUNDEL MEDICAL CENTER INC: $50,000 over 1y, 0.0% of budgetHABITAT FOR HUMANITY OF THE CHESAPEAKE INC: $50,000 over 1y, 0.5% of budgetSTEVENSON UNIVERSITY: $50,000 over 1y, 0.0% of budgetLUTHERAN IMMIGRATION & REFUGEE SERVICE INC DBA GLOBAL REFUGE: $50,000 over 1y, 0.0% of budgetHISTORIC HAMPTON INCORPORATED: $50,000 over 1y, 34% of budgetTHE ODYSSEY SCHOOL INC: $50,000 over 1y, 0.7% of budgetBALTIMORE RESEARCH & EDUCATION FOUNDATION INC: $40,500 over 1y, 1.8% of budgetSOCCER WITHOUT BORDERS: $40,000 over 1y, 1.4% of budgetTHE HOWARD COUNTY CONSERVANCY INC: $39,000 over 2y, 2.3% of budgetLEGACY HEALTH: $35,000 over 2y, 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.

Baltimore Community F…France-Merrick Founda…The United Way of Cen…T Rowe Price Program …The Abell Foundation …The Bunting Family Fo…The Marion I & Henry …T Rowe Price Foundati…Brown Advisory Charit…Associated Jewish Cha…Dr Frank C Marino Fou…The Harry and Jeanett…
Baltimore Community Foundation IncMD92.7× affinity49 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Baltimore Community Foundation Inc · France-Merrick Foundation Inc · The United Way of Central Maryland Inc · T Rowe Price Program for Charitable Giving Inc · The Abell Foundation Inc · The Bunting Family Foundation · The Marion I & Henry J Knott Foundation Inc · T Rowe Price Foundation · Brown Advisory Charitable Foundation Inc · Associated Jewish Charities of Baltimore · Dr Frank C Marino Foundation Inc · The Harry and Jeanette Weinberg 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 Middendorf Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from Middendorf Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 240%1%5%11%20%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 7%
  • Lutheran Immigration & Refugee Service Inc Dba Global Refuge: 100% of income from government
  • Baltimore Tree Trust Inc: 100% of income from government
  • Baltimore Heritage Incorporated: 63% of income from government
  • Society for the Preservation of Maryland Antiquities Inc: 50% of income from government
  • Parks and People Inc: 43% of income from government
  • The Baltimore Children's Museum Inc: 33% of income from government
  • Govans Ecumenical Development Corp: 28% of income from government
  • First Fruits Farm Inc: 26% of income from government
  • Baltimore Squashwise Inc: 23% of income from government
  • Intersection of Change Inc: 20% of income from government
  • The House of Ruth Maryland Inc: 19% of income from government
  • The Maryland Food Bank Inc: 11% of income from government
  • Baltimore Symphony Orchestra Inc: 11% of income from government
  • Maryland Historical Society Inc: 9% of income from government
  • Maryland Academy of Sciences: 9% of income from government
  • Casa Inc: 8% of income from government
  • Pro Bono Counseling Project Inc: 8% of income from government
  • Baltimore Museum of Industry Inc: 7% of income from government
  • B&o Railroad Museum Inc: 7% of income from government
  • Center Stage Associates Inc: 7% of income from government
  • Stevenson University: 6% of income from government
  • The Howard County Conservancy Inc: 5% of income from government
  • Baltimore Museum of Art: 4% of income from government
  • Habitat for Humanity of the Chesapeake Inc: 4% of income from government
  • Maryland Zoological Society Inc: 3% of income from government
  • Chesapeake Bay Foundation Inc: 2% of income from government
  • Chesapeake Chamber Music Inc T/a Chesapeake Music: 2% of income from government
  • Jewish Museum of Maryland Inc: 2% of income from government
  • Center for Hope Inc: 1% of income from government
  • Fund for Educational Excellence Inc: 1% of income from government
  • Arts for Learning Maryland Inc: 1% of income from government
  • Washington College: 0% of income from government
  • Planned Parenthood of Maryland Inc: 0% of income from government
  • University of Maryland Medical System Corporation: 0% of income from government
  • Sheppard Pratt Health System Inc: 0% of income from government
  • Luminis Health Anne Arundel Medical Center Inc: 0% of income from government
  • Partners in Health a Nonprofit Corporation: 0% of income from government
  • Mt Washington Pediatric Hospital Inc: 0% of income from government
  • Legacy Health: 0% of income from government
no gov moneyreceives it· size = income
24get no government money at all
20report government grants on their 990 we could not trace to a source (not plotted)
3rely 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 Middendorf Foundation Inc?

Find your warmest path to Middendorf 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 161 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 Middendorf’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