· Private foundation
Mack Foundation
Its FY2025 filing reports that it accepted unsolicited grant applications.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2018–2025.
Where the money goes
Your grants by size, and where they go.
| Recipient | Amount |
|---|---|
| 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 |
Do your dollars go where the need is?
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Your 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. Your grants skew toward lower-need ZIPs.
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.
Which US states your grants reach
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.
Who you back again
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
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
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2025, 86% of grant dollars renewed an existing relationship; $900 went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). 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
- TJTHE JEWISH COMMUNITY CENTER IN SHERMAN INC5× · 2021–2025 · $10k · revenue +135%
- MMMETROPOLITAN MUSEUM OF ART8× · 2018–2025 · $5k · revenue +58%
WORLD CENTRAL KITCHEN INC3× · 2020–2023 · $2k · revenue +21%
Funded once
- TWTHEATER WORKSone grant, 2019 · $2k
- NMNEW MILFORD REFUGEE RESETTLEMENTgraduatedone grant, 2022 · $2k · revenue +161%
- SBSTONY BROOK FOUNDATION INCgraduatedone grant, 2020 · $1k · revenue +273%
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
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."
The mission of the jewish museum is to collect, preserve, exhibit and interpret art and jewish culture. see schedule o for more information.
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.
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…
Marymount manhattan college is an urban, independent, liberal arts college (see schedule o).
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.
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…
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…
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…
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).
Nmoa mission statement is: we welcome everyone with inclusive experiences that spark curiosity and foster community.
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.
For reference, the grantee most central to the portfolio’s shape is West Side Center for Community Life and 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.
For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.
Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.
Your grantees are a median of 47 years old; the field is 18. You back the established end — and your money leans older still.
The field is 19% startups (under 5 years old) — 3% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 10% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
34 grantees tracked through their own filings, 2017–2025.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.
Counted here: distinct organizations you funded across 2017–2025, 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; the rest are funded organizations whose filings we could not track year by year.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
Go grantee by grantee — a decade per org, and how each moved after you funded them
A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.
- Who funds THE JEWISH COMMUNITY CENTER IN SHERMAN INC ↗
- Who funds METROPOLITAN MUSEUM OF ART ↗
- Who funds WORLD CENTRAL KITCHEN INC ↗
- Who funds NEW MILFORD REFUGEE RESETTLEMENT ↗
- Who funds Association of Religious Communities Inc ↗
- Who funds CENTRAL PARK CONSERVANCY INC ↗
- Who funds STONY BROOK FOUNDATION INC ↗
- Who funds SHERMAN CHAMBER ENSEMBLE INC ↗
- Who funds HOPE IN A BOX INC ↗
- Who funds CONNECTICUT AUDUBON SOCIETY INC ↗
- Who funds WEST SIDE CENTER FOR COMMUNITY LIFE ↗
- Who funds My Sister's House Inc ↗
- Who funds FRESHSTART VISIONS ↗
- Who funds Wildlife Conservation Society ↗
- Who funds Catie's Closet Inc ↗
- Who funds THE TRUSTEES OF THE NEW YORK SOCIETY LIBRARY ↗
- Who funds JEWISH COMMUNITY CENTER INC ↗
- Who funds SWARTHMORE COLLEGE ↗
- Who funds PRATT NATURE CENTER INC ↗
- Who funds NEW YORK PUBLIC RADIO ↗
- Who funds WHITNEY MUSEUM OF AMERICAN ART ↗
- Who funds NORTHWEST CONNECTICUT LAND CONSERVANCY INC ↗
- Who funds MUSIC & MEMORY INC ↗
- Who funds MITOACTION INC ↗
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
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
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Government reliance of your grantees
Every dot is one organization Mack Foundation funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal, a single department, or state — and drag the year to watch it move.
- 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
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 your grant caused the public funding. Coverage is precision-first — a floor, not 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 12–24 months.
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.