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The Heather Hay Miller Foundation Inc Formerly the Heather Hay Murren Foundati at a glance

· Private foundation

The Heather Hay Miller Foundation Inc Formerly the Heather Hay Murren Foundati

Its FY2025 filing reports that it accepted unsolicited grant applications.

$919k
Granted FY2025still arriving
17
Grants FY2025still arriving
7
States reached
$535k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0197% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2022 to 2025.

Education$1.8MEnvironment$120kHuman Services$120kYouth Development$80kHealth$33kCrime & Legal$20kInternational$20kCivil Rights$15kOther$0
02FY2025 · 17 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k2 grants · $10k
  • $10k–50k10 grants · $149k
  • $50k–250k4 grants · $225k
  • $250k+1 grant · $535k
$15,000
Median grant
7
States reached
$22M
Total assets
Largest grants
RecipientAmount
JOHNS HOPKINS UNIVERSITY & MEDICINE$535,000
CHESAPEAKE BAY FOUNDATION$75,000
CARON$50,000
LEGACY YOUTH LEADERSHIP$50,000
13 FOLDS OF HONOR$50,000
THE HIGHLANDS SCHOOL$34,000
LEGAL AID CENTER OF SOUTHERN NEVADA$20,000
THIRST PROJECT$20,000
MENTORING MENTORS INC$15,000
BEST FRIENDS ANIMAL SOCIETY$10,000
UNIVERSITY OF MARYLAND ST JOSEPH MEDICAL CENTER FOUNDATION$10,000
VOLUNTEERS IN MEDICIANE OF SOUTHERN NEVADA$10,000
THE FORESTRY AND FIRE RECRUITMENT PROGRAM$10,000
BALTIMORE MUSEUM OF ART$10,000
PEOPLE'S BANK OF COMMERCE FAO DOMESTIC VIOLENCE$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:

Dollar for dollar, its grants (FY23–25) land where the poverty rate runs at 17%, against an area that typically sits at 11%. 90% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 11%CARON: $50k → 11%LOS ANGELES PARKS FOUNDATION: $5k → 14%SARASOTA MEMORIAL HEALTHCARE FOUNDATION: $10k → 9%BEST FRIENDS ANIMAL SOCIETY: $10k → 9%VOLUNTEERS IN MEDICIANE OF SOUTHERN NEVADA: $10k → 13%CHESAPEAKE BAY FOUNDATION: $10k → 6%CHESAPEAKE BAY FOUNDATION: $75k → 7%THE HIGHLANDS SCHOOL: $34k → 7%AHA FOUNDATION INC: $15k → 8%UNIVERSITY OF MARYLAND ST JOSEPH MEDICAL CENTER FOUNDATION: $10k → 11%MENTORING MENTORS INC: $15k → 19%THE PASADENA HUMANE SOCIETY: $5k → 14%LEGAL AID CENTER OF SOUTHERN NEVADA: $20k → 13%CHESAPEAKE WILDLIFE HERITAGE: $20k → 7%THE HIGHLANDS SCHOOL: $30k → 7%MENTORING MENTORS INC: $15k → 19%THE FORESTRY AND FIRE RECRUITMENT PROGRAM: $10k → 14%VGK FOUNDATION: $3k → 13%THE HIGHLANDS SCHOOL: $20k → 7%BALTIMORE TREE TRUST: $15k → 19%LEGACY YOUTH LEADERSHIP: $50k → 14%THE FOLDED FLAG FOUNDATION: $2k → 13%THE BRYN MAWR SCHOOL FOR GIRLS OF BALTIMORE CITY INC: $15k → 19%THIRST PROJECT: $20k → 14%GREATER GRACE CHRISTIAN ACADEMY: $10k → 13%JOHNS HOPKINS UNIVERSITY & MEDICINE: $740k → 19%GREATER GRACE CHRISTIAN ACADEMY: $10k → 13%JOHNS HOPKINS UNIVERSITY & MEDICINE: $535k → 19%BALTIMORE MUSEUM OF ART: $10k → 19%JOHNS HOPKINS UNIVERSITY & MEDICINE: $400k → 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

NV
PA
CT
CA
UT
MD
OK
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.

87%of every dollar goes to organizations it has funded before.
$2.0M · 7 repeat orgs$290k to everyone else

Grantees it renews have grown median revenue +4% since the first grant, against 0% for those funded once.

7 repeat relationships: 6 still active in FY2025, 1 since wound down; 11 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

7
8

Total granted

$2.0M
$90k

Median revenue growth · since first grant

+4%
0%

Still filing today

57%
75%

New vs renewed · share of each year

In FY2025, 78% of grant dollars renewed an existing relationship; $200k went to new ones.

50%100%’22’23’24’25
RenewedFirst-time

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

’22’23’24’25
EducationEnvironmentPublic BenefitInternationalHealthAnimalsOther
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
    3× · 2023–2025 · $1.7M · revenue +4%
  • 1F
    13 FOLDS OF HONOR
    2× · 2024–2025 · $100k
  • CHESAPEAKE BAY FOUNDATION INC
    2× · 2023–2025 · $85k · revenue +10%

Funded once

  • CW
    CHESAPEAKE WILDLIFE HERITAGE INC
    one grant, 2023 · $20k · revenue -7%
  • AF
    AHA FOUNDATION INC
    one grant, 2024 · $15k · revenue 0%
  • BT
    BALTIMORE TREE TRUST INC
    one grant, 2024 · $15k · revenue 0%
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
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…

—
2
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…

—
3
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
4
University of Maryland Family Medicine 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
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
6
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
7
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.

—
8
University of Maryland Eye 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
9
University of Maryland Otorhino-Laryngology-Head & Neck Surgery 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
10
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
11
Federation of State Medical Boards of the United States Inc

The fsmb serves as the voice for state medical boards, supporting them through education, assessment, research and advocacy while providing services and initiatives that promote patient safety, quality health care and regulatory best…

Health
12
University of Maryland Emergency Medicine 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
How this is measured
The grantee most central to the portfolio’s shape is University of Maryland St Joseph Medical Center Foundation Inc; the most unlike its peers is Baltimore Museum of Art. 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

19 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. 19 of the 26 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)
2
Early backer (in before they grew)
19/19
Grantees still filing
10/19
Grew since first funded

Where the money sits, by cause and then by grantee

JOHNS HOPKINS UNIVERSITY: $1,675,000 · EducationJOHNS HOPKINS UNIVERSITYTHE HIGHLANDS SCHOOL INC: $84,000 · Education+1 more: $15,000 · Education13 FOLDS OF HONOR: $100,000 · Other13 FOLDS OF H…CARON: $50,000 · OtherCARONGREATER GRACE CHRISTIAN ACADEMY: $20,000 · OtherGREATER GRACE…PEOPLE'S BANK OF COMMERCE FAO DOMESTIC VIOLENCE: $20,000 · OtherPEOPLE'S BANK…VOLUNTEERS IN MEDICIANE OF SOUTHERN NEVADA: $10,000 · OtherYALE UNIVERSITY: $10,000 · OtherSARASOTA MEMORIAL HEALTHCARE FOUNDATION INC: $10,000 · OtherUniversity of Maryland St Joseph Medical Center Foundation Inc: $10,000 · OtherBEST FRIENDS ANIMAL SOCIETY: $10,000 · OtherURBAN ASSOCIATION OF FORESTRY AND FIRE PROFESSIONALS INC: $10,000 · OtherBALTIMORE MUSEUM OF ART: $10,000 · Other+3 more: $12,500 · OtherCHESAPEAKE BAY FOUNDATION INC: $85,000 · EnvironmentCHESAPEAKE WILDLIFE HERITAGE INC: $20,000 · EnvironmentBALTIMORE TREE TRUST INC: $15,000 · EnvironmentLEGACY YOUTH LEADERSHIP INTERNATIONAL: $50,000 · Public BenefitTHE FOLDED FLAG FOUNDATION: $2,000 · Public BenefitTHE THIRST PROJECT: $20,000 · InternationalAHA FOUNDATION INC: $15,000 · InternationalMentoring Mentors Inc: $30,000 · Youth DevelopmentLEGAL AID CENTER OF SOUTHERN NEVADA: $20,000 · Civil Rights
Education$1,774,000Other$272,500Environment$120,000Public Benefit$52,000International$35,000Youth Development$30,000Civil Rights$20,000

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 budgetJOHNS HOPKINS UNIVERSITY: $1,675,000 over 3y, 0.0% of budgetCHESAPEAKE BAY FOUNDATION INC: $85,000 over 2y, 0.2% of budgetTHE HIGHLANDS SCHOOL INC: $84,000 over 3y, 1.1% of budgetMentoring Mentors Inc: $30,000 over 2y, 5.6% of budgetCHESAPEAKE WILDLIFE HERITAGE INC: $20,000 over 1y, 2.3% of budgetAHA FOUNDATION INC: $15,000 over 1y, 1.3% of budgetBALTIMORE TREE TRUST INC: $15,000 over 1y, 0.3% of budgetTHE BRYN MAWR SCHOOL FOR GIRLS OF BALTIMORE CITY INC: $15,000 over 1y, 0.0% of budgetURBAN ASSOCIATION OF FORESTRY AND FIRE PROFESSIONALS INC: $10,000 over 1y, 0.2% of budgetSARASOTA MEMORIAL HEALTHCARE FOUNDATION INC: $10,000 over 1y, 0.0% of budgetUniversity of Maryland St Joseph Medical Center Foundation Inc: $10,000 over 1y, 0.1% of budgetBALTIMORE MUSEUM OF ART: $10,000 over 1y, 0.0% of budgetTHE FOLDED FLAG FOUNDATION: $2,000 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.

T Rowe Price Program …Gs Donor Advised Phil…National Philanthropi…Morgan Stanley Global…Vanguard Charitable E…American Endowment Fo…The Bank of America C…Donor Advised Charita…American Online Givin…Fidelity Investments …Amazonsmile Foundation
T Rowe Price Program for Charitable Giving IncMD14.1× affinity5 shared granteesties to 10 of 10Hover any node to trace its alignments.Compare side by side →

Open a dossier: T Rowe Price Program for Charitable Giving Inc · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · National Philanthropic Trust · Morgan Stanley Global Impact Funding Trust Inc · Vanguard Charitable Endowment Program · American Endowment Foundation · The Bank of America Charitable Foundation Inc · Donor Advised Charitable Giving Inc · American Online Giving Foundation 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 The Heather Hay Miller Foundation Inc Formerly the Heather Hay Murren Foundati funds: left to right is the share of its income from government, bottom to top the share from The Heather Hay Miller Foundation Inc Formerly the Heather Hay Murren Foundati. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 50%1%3%6%10%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 12%
  • Baltimore Tree Trust Inc: 100% of income from government
  • Aha Foundation Inc: 42% of income from government
  • Johns Hopkins University: 12% of income from government
  • Baltimore Museum of Art: 4% of income from government
  • Chesapeake Bay Foundation Inc: 2% of income from government
no gov moneyreceives it· size = income
5get 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 26 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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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