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Mack Foundation at a glance

· Private foundation

Mack Foundation

Its FY2025 filing reports that it accepted unsolicited grant applications.

$6k
Granted FY2025still arriving
15
Grants FY2025still arriving
6
States reached
$3k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0198% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2018 to 2025.

Religion$29kHuman Services$17kArts & Culture$9kEducation$4kHealth$3kPublic Safety & Disaster$3kEnvironment$2kPhilanthropy$2kOther$0
02FY2025 · 15 grants

Where the money goes

Grants by size, and the largest recipients.

$250
Median grant
6
States reached
$43k
Total assets
Largest grants
RecipientAmount
JEWISH COMMUNITY CENTER OF SHERMAN$2,500
THE SHERMAN LIBRARY$770
METROPOLITAN MUSEUM OF ART$600
APPLE HILL CENTER$500
THE NORTHWEST CONNECTICUT LAND CONSERVANCY$250
ASSOCIATION OF RELIGIOUS COMMUNITIES$250
CONNECTICUT AUDUBON SOCIETY$250
SHERMAN CHAMBER ENSEMBLE$250
MUSEUM OF MODERN ART$200
MY SISTER'S HOUSE$150
SHIELD MINISTRIES$150
RIPON COLLEGE$100
SWARTHMORE COLLEGE$100
THE SHERMAN VOLUNTEER FIRE DEPARTMENT$100
Individual grant recipient$100
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, $2k) land where the poverty rate runs at 9%, against an area that typically sits at 10%. 7% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 10%CATIE'S CLOSET: $260 → 8%SHIELD MINISTRIES: $150 → 12%CATIE'S CLOSET: $250 → 8%THE ASSOCIATION OF RELIGIOUS COMMUNITIES: $850 → 9%ASSOCIATION OF RELIGIOUS COMMUNITIES: $250 → 9%ASSOCIATION OF RELIGIOUS COMMUNITIES: $250 → 9%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

NH
WI
NY
MA
PA
NJ
CT
SC
DC
AL
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.

83%of every dollar goes to organizations it has funded before.
$61k · 23 repeat orgs$13k to everyone else

23 repeat relationships: 9 still active in FY2025, 14 since wound down; 6 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

23
27

Total granted

$61k
$12k

Median revenue growth · since first grant

+21%
+52%

Still filing today

61%
48%

New vs renewed · share of each year

In FY2025, 86% of grant dollars renewed an existing relationship; $900 went to new ones.

50%100%’18’19’20’21’22’23’24’25
RenewedFirst-time

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

’18’19’20’21’22’23’24’25
Arts & CultureHuman ServicesEducationEnvironmentHealthInternationalOther
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

  • TJ
    THE JEWISH COMMUNITY CENTER IN SHERMAN INC
    5× · 2021–2025 · $10k · revenue +135%
  • MM
    METROPOLITAN MUSEUM OF ART
    8× · 2018–2025 · $5k · revenue +58%
  • WORLD CENTRAL KITCHEN INC
    3× · 2020–2023 · $2k · revenue +21%

Funded once

  • TW
    THEATER WORKS
    one grant, 2019 · $2k
  • NM
    NEW MILFORD REFUGEE RESETTLEMENTgraduated
    one grant, 2022 · $2k · revenue +161%
  • SB
    STONY BROOK FOUNDATION INCgraduated
    one grant, 2020 · $1k · revenue +273%
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
American Museum of Natural History

The museum's mission statement is: "to discover, interpret, and disseminate - through scientific research and education - knowledge about human cultures, the natural world, and the universe."

Arts & Culture
2
The Jewish Museum

The mission of the jewish museum is to collect, preserve, exhibit and interpret art and jewish culture. see schedule o for more information.

Arts & Culture
3
The Pierpont Morgan Library

The Morgan Library & Museum celebrates and shares the history and process of human creativity from antiquity to the present day through the preservation, study, and interpretation of a dynamic and growing collection.

Education
4
National September 11 Memorial and Museum At the World Trade Center

The national september 11 memorial & museum at the world trade center bears solemn witness to the terrorist attacks of september 11, 2001, and february 26, 1993. located at a site made sacred through loss, the memorial & museum remembers…

Arts & Culture
5
Marymount Manhattan College

Marymount manhattan college is an urban, independent, liberal arts college (see schedule o).

Education
6
New York Genome Center Inc

Operate a state-of-the-art, world-class genomic research center that creates and uses advanced genomics to understand the genetic basis of disease. for more information, see schedule o.

Health
7
Museum of the City of New York

The museum of the city of new york fosters understanding of the distinctive nature of urban life in the world's most influential metropolis. it engages visitors by celebrating, documenting, and interpreting the city's past, present, and…

Arts & Culture
8
Manhattan School of Music

Manhattan school of music is deeply committed to excellence in education, performance, and creative activity; to the humanity of the school's environment; and to the cultural enrichment of the larger community. a premiere international…

Arts & Culture
9
Munson-Williams-Proctor Arts Institute

Munson-williams-proctor arts institute (mwpai) is a fine arts center dedicated to serving diverse audiences by advancing the appreciation, understanding, and enjoyment of the arts. the art institute aims to promote interest and…

Arts & Culture
10
The Brooklyn Institute of Arts and Sciences

The mission of the brooklyn institute of arts and sciences, d/b/a brooklyn museum (the "museum") is to bring people together through art and experiences that inspire celebration, compassion, courage, and the will to act. (see schedule o).

Arts & Culture
11
The Newark Museum Association

Nmoa mission statement is: we welcome everyone with inclusive experiences that spark curiosity and foster community.

Arts & Culture
12
New Museum of Contemporary Art

A center for exhibitions, information, and documentation about living artists since 1977, which continues to be a place of experimentation and a hub of new art and new ideas.

Arts & Culture
How this is measured
The grantee most central to the portfolio’s shape is West Side Center for Community Life; the most unlike its peers is Wildlife Conservation Society. 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

34 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. 34 of the 56 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)
8
Early backer (in before they grew)
32/34
Grantees still filing
20/34
Grew since first funded

Where the money sits, by cause and then by grantee

CONGREGATION ANSCHE CHESED: $24,550 · OtherCONGREGATION ANSCHE CHESEDTHE SHERMAN LIBRARY: $3,140 · OtherTHE SHERMAN LIBRARYSHERMAN CARES: $2,898 · OtherSHERMAN CARESTEMPLE SHOLOM INC: $2,800 · OtherTEMPLE SHOLOM INCTHEATER WORKS: $1,750 · Other+31 more: $12,745 · Other+31 moreTHE JEWISH COMMUNITY CENTER IN SHERMAN INC: $9,575 · ReligionTHE JEWISH COM…METROPOLITAN MUSEUM OF ART: $4,760 · Arts & CultureMETROPOLI…SHERMAN CHAMBER ENSEMBLE INC: $1,000 · Arts & CultureSHERMAN C…NEW YORK PUBLIC RADIO: $300 · Arts & CultureWHITNEY MUSEUM OF AMERICAN ART: $266 · Arts & Culture+1 more: $200 · Arts & CultureWORLD CENTRAL KITCHEN INC: $2,264 · InternationalNEW MILFORD REFUGEE RESETTLEMENT: $1,500 · InternationalAssociation of Religious Communities Inc: $1,350 · Human ServicesMy Sister's House Inc: $700 · Human ServicesCatie's Closet Inc: $510 · Human ServicesGIVEDIRECTLY INC: $250 · Human ServicesSHIELD MINISTRIES: $150 · Human ServicesSTONY BROOK FOUNDATION INC: $1,000 · EducationHOPE IN A BOX INC: $756 · EducationSWARTHMORE COLLEGE: $450 · EducationRIPON COLLEGE: $100 · EducationCONNECTICUT AUDUBON SOCIETY INC: $750 · EnvironmentPRATT NATURE CENTER INC: $400 · EnvironmentNORTHWEST CONNECTICUT LAND CONSERVANCY INC: $250 · Environment
Other$47,883Religion$9,575Arts & Culture$6,526International$3,764Human Services$2,960Education$2,306Environment$1,400

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 budgetTHE JEWISH COMMUNITY CENTER IN SHERMAN INC: $9,575 over 5y, 5.8% of budgetMETROPOLITAN MUSEUM OF ART: $4,760 over 8y, 0.0% of budgetWORLD CENTRAL KITCHEN INC: $2,264 over 3y, 0.0% of budgetNEW MILFORD REFUGEE RESETTLEMENT: $1,500 over 1y, 2.0% of budgetAssociation of Religious Communities Inc: $1,350 over 3y, 0.1% of budgetCENTRAL PARK CONSERVANCY INC: $1,100 over 3y, 0.0% of budgetSTONY BROOK FOUNDATION INC: $1,000 over 1y, 0.0% of budgetSHERMAN CHAMBER ENSEMBLE INC: $1,000 over 3y, 0.5% of budgetHOPE IN A BOX INC: $756 over 2y, 0.3% of budgetCONNECTICUT AUDUBON SOCIETY INC: $750 over 3y, 0.0% of budgetWEST SIDE CENTER FOR COMMUNITY LIFE: $750 over 2y, 0.0% of budgetMy Sister's House Inc: $700 over 3y, 0.0% of budgetFRESHSTART VISIONS: $550 over 2y, 0.0% of budgetWildlife Conservation Society: $525 over 1y, 0.0% of budgetCatie's Closet Inc: $510 over 2y, 0.0% of budgetTHE TRUSTEES OF THE NEW YORK SOCIETY LIBRARY: $500 over 1y, 0.0% of budgetJEWISH COMMUNITY CENTER INC: $500 over 1y, 0.0% of budgetSWARTHMORE COLLEGE: $450 over 3y, 0.0% of budgetPRATT NATURE CENTER INC: $400 over 1y, 0.1% of budgetNEW YORK PUBLIC RADIO: $300 over 2y, 0.0% of budgetWHITNEY MUSEUM OF AMERICAN ART: $266 over 2y, 0.0% of budgetEQUAL JUSTICE INITIATIVE: $250 over 1y, 0.0% of budgetMUSIC & MEMORY INC: $250 over 1y, 0.1% of budgetMITOACTION INC: $250 over 1y, 0.1% of budgetGIVEDIRECTLY INC: $250 over 1y, 0.0% of budgetMuseum of Modern Art: $200 over 1y, 0.0% of budgetRise Up Kingston Inc: $150 over 1y, 0.1% of budgetSHIELD MINISTRIES: $150 over 1y, 0.0% of budgetALS UNITED GREATER NEW YORK INC: $105 over 1y, 0.0% of budgetRIPON COLLEGE: $100 over 1y, 0.0% of budgetSHERMAN VOLUNTEER FIRE DEPARTMENT: $100 over 1y, 0.0% of budgetNATHAN LITTAUER HOSPITAL ASSOCIATION: $100 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.

Jewish Communal FundThe Goldman Sachs Cha…Network for GoodVanguard Charitable E…The Pfizer Foundation…National Philanthropi…Morgan Stanley Global…American Online Givin…Fidelity Investments …The Bank of America C…Donor Advised Charita…Amazonsmile Foundation
Jewish Communal FundNY13× affinity6 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Jewish Communal Fund · The Goldman Sachs Charitable Gift Fund · Network for Good · Vanguard Charitable Endowment Program · The Pfizer Foundation Inc · National Philanthropic Trust · Morgan Stanley Global Impact Funding Trust Inc · American Online Giving Foundation Inc · Fidelity Investments Charitable Gift Fund · The Bank of America Charitable Foundation Inc · Donor Advised Charitable Giving Inc · 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 Mack Foundation funds: left to right is the share of its income from government, bottom to top the share from Mack Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 10%1%3%6%10%funder's share of their income ↑0%6%13%19%25%share of the org’s income from government →median 4%
  • Northwest Connecticut Land Conservancy Inc: 9% of income from government
  • Association of Religious Communities Inc: 6% of income from government
  • Sherman Chamber Ensemble Inc: 6% of income from government
  • Catie's Closet Inc: 4% of income from government
  • Connecticut Audubon Society Inc: 1% of income from government
  • Sherman Volunteer Fire Department: 0% of income from government
  • Pratt Nature Center Inc: 0% of income from government
no gov moneyreceives it· size = income
1get no government money at all
7report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–25%
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 Mack Foundation?

Find your warmest path to Mack Foundation 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 56 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 Mack’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