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The Mountz Family Foundation at a glance

· Private foundation

The Mountz Family Foundation

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.

$362k
Granted FY2025still arriving
9
Grants FY2025still arriving
3
States reached
$280k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
01100% classified

What it funded, over time

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

Science & Tech$672kHealth$664kCommunity Improvement$600kEducation$510kSocial Science$210kEnvironment$25kPublic Benefit$10kFood & Nutrition$5kOther$0
02FY2025 · 9 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k4 grants · $10k
  • $10k–50k4 grants · $72k
  • $250k+1 grant · $280k
$12,500
Median grant
3
States reached
$934k
Total assets
Largest grants
RecipientAmount
MIT$280,000
DEERFIELD ACADEMY$25,000
BOSTON CHILDREN'S HOSPITAL$22,200
THE FENN SCHOOL$12,500
CARROLL SCHOOL$12,500
NATIONAL INVENTORS HALL OF FAME$5,000
THE UMBRELLA ARTS CENTER$2,500
PAN MASS CHALLENGE$1,000
KHAN ACADEMY$1,000
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 (FY17–25) land where the poverty rate runs at 13%, against an area that typically sits at 7%. 99% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 7%NASHOBA BROOKS SCHOOL: $27k → 8%NASHOBA REGIONAL SCHOOL DISTRICT: $20k → 11%DEERFIELD ACADEMY: $25k → 14%Boston Children's Hospital: $100k → 16%COTTONWOOD LEADERSHIP FUND: $10k → 15%NATIONAL INVENTORS HALL OF FAME: $5k → 13%FAMILY REACH FOUNDATION: $14k → 4%NASHOBA BROOKS SCHOOL: $20k → 8%BOSTON CHILDREN'S HOSPITAL: $100k → 16%NATIONAL INVENTORS HALL OF FAME: $5k → 13%NASHOBA BROOKS SCHOOL: $5k → 8%BRIGHAM AND WOMEN'S HOSPITAL: $3k → 16%CARROLL SCHOOL: $13k → 8%BRIGHAM AND WOMEN'S HOSPITAL: $3k → 16%CARROLL SCHOOL: $10k → 8%Boston Children's Hospital: $3k → 16%CARROLL SCHOOL: $10k → 8%NASHOBA BROOKS SCHOOL: $30k → 8%NASHOBA BROOKS SCHOOL: $25k → 8%HBS FUND FOR LEADERSHIP & INNOVATION: $200k → 16%THE FENN SCHOOL: $13k → 8%HBS FUND FOR LEADERSHIP & INNOVATION: $200k → 16%THE FENN SCHOOL: $13k → 8%Harvard Business School: $200k → 16%THE FENN SCHOOL: $10k → 8%HBS FUND FOR LEADERSHIP & INNOVATION: $200k → 16%HARVARD BUSINESS SCHOOL: $10k → 16%MIT: $280k → 8%MIT: $280k → 8%Massachusetts Institute of Technology: $200k → 8%BOSTON CHILDREN'S HOSPITAL: $164k → 16%SANDBOX INNOVATION FUND: $50k → 8%BOSTON CHILDREN'S HOSPITAL: $161k → 16%Massachusetts Institute of Technology: $50k → 8%BOSTON CHILDREN'S HOSPITAL: $23k → 16%MIT: $20k → 8%BOSTON CHILDREN'S HOSPITAL: $22k → 16%MIT: $10k → 8%BOSTON CHILDREN'S HOSPITAL: $15k → 16%MIT: $10k → 8%BOSTON CHILDREN'S HOSPITAL TRUST: $15k → 16%MIT: $10k → 8%BOSTON CHILDREN'S HOSPITAL TRUST: $11k → 16%LMS Fund to Preserve the LMS Woods: $25k → 8%LEXINGTON MONTESSORI SCHOOL: $25k → 8%Lexington Montessori School: $4k → 8%LEXINGTON MONTESSORI SCHOOL: $3k → 8%LEXINGTON MONTESSORI SCHOOL: $3k → 8%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

MN
MA
OH
NJ
CA
VA
AZ
KS
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.
$2.3M · 15 repeat orgs$148k to everyone else

Grantees it renews have grown median revenue +46% since the first grant, against -7% for those funded once.

15 repeat relationships: 8 still active in FY2025, 7 since wound down; 1 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

15
10

Total granted

$2.3M
$123k

Median revenue growth · since first grant

+46%
-7%

Still filing today

53%
50%

New vs renewed · share of each year

In FY2025, 93% of grant dollars renewed an existing relationship; $25k 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
EducationHealthPhilanthropyArts & CultureOther
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

  • CH
    Children's Hospital Corporation
    9× · 2017–2025 · $621k · revenue +91%
  • NB
    NASHOBA BROOKS SCHOOL OF CONCORD INC
    4× · 2021–2024 · $107k · revenue +6%
  • LM
    LEXINGTON MONTESSORI SCHOOL INC
    3× · 2017–2019 · $35k · revenue +46%

Funded once

  • SI
    SANDBOX INNOVATION FUND
    one grant, 2018 · $50k
  • LF
    LMS Fund to Preserve the LMS Woods
    one grant, 2017 · $25k
  • NR
    NASHOBA REGIONAL SCHOOL DISTRICT
    one grant, 2020 · $20k
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
Boston Architectural College

The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.

—
2
Trustees of Dartmouth College

Dartmouth College educates the most promising students and prepares them for a lifetime of learning and of responsible leadership, through a faculty dedicated to teaching and the creation of knowledge.

Education
3
Northeast College of Health Sciences

Northeast college of health sciences (the college) is committed to academic excellence, leadership, and professional best practices in the health sciences.

Education
4
The Peak School

The peak school seeks to ignite a passion for learning, to develop students of diverse talents and backgrounds who think critically and act with integrity, and to graduate compassionate, confident, capable students who will embrace their…

Education
5
Breck School

We create confident learners who lead lives of intellectual curiosity, self-knowledge, and social responsibility.

Education
6
Northfield Mount Hermon School

Northfield mount hermon educates the head, heart and hands of our students. we engage their intellect, compassion, and talents, empowering them to act with humanity and purpose.

Education
7
Darrow School

Darrow school is dedicated to serving students with diverse backgrounds and abilities, building on each student's talents and interests to inspire enduring confidence for success in college and life. this mission is accomplished through…

Education
8
Pembroke Hill School

A preschool through 12th grade, private, college preparatory school. the school's mission statement is "together, cultivating the best in each for the benefit of all."

Education
9
Meadowbrook School of Weston Incorporated

Meadowbrook knows, loves, and challenges every child. together, as a diverse community with high academic, ethical and social standards, we nurture character, promote confidence, inspire creativity and foster critical thinking skills as we…

Education
10
Mark Day School

Innovative and full of heart, mark day school nurtures each child to pursue their curiosity, think critically, embrace challenge with courage and joy, and work in partnership with others to build more caring and inclusive communities.

—
11
Trustees of Boston University

Organization's mission: boston university is an international, comprehensive, private research university, committed to educating students to be reflective, resourceful individuals ready to live, adapt, and lead in an interconnected world.…

—
12
Children's Hospital Pathology Foundation Inc

The Foundation's mission is to provide pathology services primarily to patients at Boston Children's Hospital and at satellite locations. The Foundation carries on and promotes basic and applied medical research and education in the field…

Health
How this is measured
The grantee most central to the portfolio’s shape is Trustees of Deerfield Academy; the most unlike its peers is Cottonwood 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

16 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. 16 of the 28 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)
0
Early backer (in before they grew)
16/16
Grantees still filing
10/16
Grew since first funded

Where the money sits, by cause and then by grantee

MIT: $610,100 · OtherMITHBS FUND FOR LEADERSHIP & INNOVATION: $600,000 · OtherHBS FUND FOR LEADERSHIP & INNOVATIONHarvard Business School: $210,000 · OtherHarvard Business School+12 more: $179,478 · Other+12 moreChildren's Hospital Corporation: $620,775 · HealthChildren's Hospital Corpor…+2 more: $15,800 · HealthMassachusetts Institute of Technology: $250,000 · EducationMassachusetts Insti…NASHOBA BROOKS SCHOOL OF CONCORD INC: $106,800 · EducationNASHOBA BROOKS SCHO…LEXINGTON MONTESSORI SCHOOL INC: $35,200 · EducationLEXINGTON MONTESSOR…THE CARROLL SCHOOL: $32,500 · EducationTHE CARROLL SCHOOLTRUSTEES OF DEERFIELD ACADEMY: $25,000 · EducationTRUSTEES OF DEERFIE…+3 more: $4,100 · EducationNATIONAL INVENTORS HALL OF FAME INC: $12,000 · Arts & CultureCOTTONWOOD FOUNDATION: $1,680 · Philanthropy
Other$1,599,578Health$636,575Education$453,600Arts & Culture$12,000Philanthropy$1,680

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 budgetChildren's Hospital Corporation: $620,775 over 9y, 0.0% of budgetMassachusetts Institute of Technology: $250,000 over 1y, 0.0% of budgetNASHOBA BROOKS SCHOOL OF CONCORD INC: $106,800 over 4y, 0.3% of budgetLEXINGTON MONTESSORI SCHOOL INC: $35,200 over 3y, 0.4% of budgetTHE FENN SCHOOL: $35,000 over 3y, 0.1% of budgetTHE CARROLL SCHOOL: $32,500 over 3y, 0.0% of budgetTRUSTEES OF DEERFIELD ACADEMY: $25,000 over 1y, 0.0% of budgetFAMILY REACH FOUNDATION: $13,800 over 1y, 0.1% of budgetNATIONAL INVENTORS HALL OF FAME INC: $12,000 over 4y, 0.0% of budgetPAN-MASSACHUSETTS CHALLENGE INC: $9,050 over 8y, 0.0% of budgetKHAN ACADEMY INC: $3,000 over 3y, 0.0% of budgetMAYO CLINIC: $2,000 over 1y, 0.0% of budgetCOTTONWOOD FOUNDATION: $1,680 over 1y, 15% of budgetMATHCOUNTS Foundation: $1,000 over 1y, 0.0% of budgetTHE BOSTON ATHLETIC ASSOCIATION: $395 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 Children's Hospital Corporation ↗
  • Who funds Massachusetts Institute of Technology ↗
  • Who funds NASHOBA BROOKS SCHOOL OF CONCORD INC ↗
  • Who funds LEXINGTON MONTESSORI SCHOOL INC ↗
  • Who funds THE FENN SCHOOL ↗
  • Who funds THE CARROLL SCHOOL ↗
  • Who funds TRUSTEES OF DEERFIELD ACADEMY ↗
  • Who funds FAMILY REACH FOUNDATION ↗
  • Who funds NATIONAL INVENTORS HALL OF FAME INC ↗
  • Who funds PAN-MASSACHUSETTS CHALLENGE INC ↗
  • Who funds KHAN ACADEMY INC ↗
  • Who funds MAYO CLINIC ↗
  • Who funds COTTONWOOD FOUNDATION ↗
  • Who funds MATHCOUNTS Foundation ↗
  • Who funds THE BOSTON ATHLETIC ASSOCIATION ↗
  • Who funds The Side-Out Foundation ↗

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.

Fidelity FoundationBoston Foundation IncVerizon FoundationMorgan Stanley Global…The Pfizer Foundation…The Bank of America C…Vanguard Charitable E…American Online Givin…Donor Advised Charita…Fidelity Investments …Amazonsmile Foundation
Fidelity FoundationMA13× affinity4 shared granteesties to 10 of 10Hover any node to trace its alignments.Compare side by side →

Open a dossier: Fidelity Foundation · Boston Foundation Inc · Verizon Foundation · Morgan Stanley Global Impact Funding Trust Inc · The Pfizer Foundation Inc · The Bank of America Charitable Foundation Inc · Vanguard Charitable Endowment Program · American Online Giving Foundation Inc · Donor Advised Charitable Giving 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 Mountz Family Foundation funds: left to right is the share of its income from government, bottom to top the share from The Mountz Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 70%1%4%8%15%funder's share of their income ↑0%10%20%30%40%share of the org’s income from government →median 10%
  • Massachusetts Institute of Technology: 35% of income from government
  • Children's Hospital Corporation: 10% of income from government
  • Pan-Massachusetts Challenge Inc: 0% of income from government
no gov moneyreceives it· size = income
7get no government money at all
1report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–40%
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 28 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 Mountz Family’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