· Private foundation
Tannen Family Foundation
Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2018–2024.
Where the money goes
Your grants by size, and where they go.
| Recipient | Amount |
|---|---|
| MOHONK PRESERVE | $5,250 |
| Individual grant recipient | $5,026 |
| THE HONEYCOMB PROJECT | $5,000 |
| UPSTREAM ALLIANCE | $5,000 |
| Individual grant recipient | $1,000 |
| WALLKILL VALLEY LAND TRUST | $1,000 |
| THE METROPOLITAN MUSEUM OF ART | $600 |
| MOMA | $550 |
| NEW YORK SOCIETY LIBRARY | $335 |
| PROPUBLICA | $200 |
| NEW YORK PUBLIC LIBRARY | $200 |
| AMNESTY INTERNATIONAL | $200 |
| THE ASIA SOCEITY MUSEUM | $150 |
| AMERICAN MUSEUM OF NATURAL HISTORY | $139 |
| DOCTORS WITHOUT BORDERS | $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 (FY18–24, $44k) land where the poverty rate runs at 14%, against an area that typically sits at 10%. 98% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-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.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +48% since the first grant, against +28% for the ones you funded once.
35 repeat relationships — 16 still active in FY2024, 19 since wound down; 4 grantees were first funded in FY2024 (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 FY2024, 98% of grant dollars renewed an existing relationship; $539 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
- THTHE HONEYCOMB PROJECT INC NFP6× · 2019–2024 · $43k · revenue +94%
- UAUpstream Alliance Inc5× · 2019–2024 · $43k · revenue +463%
- MPMOHONK PRESERVE INC4× · 2021–2024 · $29k · revenue +6%
Funded once
- NANYC AUDUBON SOCIETYone grant, 2022 · $7k
- RSRAINIER SCHOLARSgraduatedone grant, 2019 · $2k · revenue +328%
- IGIndividual grant recipientone grant, 2018 · $1k
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 new york botanical garden is a museum of plants and a scientific research center devoted to the study of plants and their uses. it is the garden's mission to improve public understanding of the natural world, horticulture, and the…
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 mission of the jewish museum is to collect, preserve, exhibit and interpret art and jewish culture. see schedule o for more information.
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).
To educate students to be ethical and socially responsible leaders in a global community.
The Frick Collection (the "Collection") operates an internationally recognized art museum and library program for the inspiration and enjoyment of the public and for the advancement of the study of fine arts and kindred subjects.
The architectural league of new york supports critically transformative work in the allied fields that shape the built environment. as a vital, independent forum, the league stimulates thinking, debate, and action on today's (continued on…
See schedule onylcv is a non-partisan policy making and political action organization that works to make environmental protection a top priority with elected officials, decision-makers and the voters by evaluating incumbent performance and…
To educate the community as to the significance of their architectural and historic heritage through the preservation, protection, improvement, and restoration of sites and buildings in western new york that are of historic or civic…
Research, education and general - princeton university is a private not-for-profit, non-sectarian institution of higher learning with approximately 5,700 undergraduate and 3,300 graduate students. 2,500 students graduated in the 2024-2025…
The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…
To preserve the unique character and natural resources of harvard.
For reference, the grantee most central to the portfolio’s shape is New York Landmarks Conservancy Inc and the most unlike its peers is National Glaucoma 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 46 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) — 0% 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.
31 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. 31 of the 58 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 HONEYCOMB PROJECT INC NFP ↗
- Who funds Upstream Alliance Inc ↗
- Who funds MOHONK PRESERVE INC ↗
- Who funds NATIONAL AUDUBON SOCIETY INC ↗
- Who funds WALLKILL VALLEY LAND TRUST ↗
- Who funds COMMITTEE FOR CHILDREN ↗
- Who funds METROPOLITAN MUSEUM OF ART ↗
- Who funds THE TRUST FOR PUBLIC LAND ↗
- Who funds Trustees of Hamilton College ↗
- Who funds WEST SIDE CENTER FOR COMMUNITY LIFE ↗
- Who funds RAINIER SCHOLARS ↗
- Who funds WHITNEY MUSEUM OF AMERICAN ART ↗
- Who funds PEOPLE'S PLACE II INC ↗
- Who funds HUDSON RIVER MARITIME MUSEUM ↗
- Who funds THE TRUSTEES OF THE NEW YORK SOCIETY LIBRARY ↗
- Who funds AMNESTY INTERNATIONAL OF THE USA INC ↗
- Who funds MEDECINS SANS FRONTIERES USA INC ↗
- Who funds WORLD CENTRAL KITCHEN INC ↗
- Who funds BARNARD COLLEGE ↗
- Who funds REPRODUCTIVE FREEDOM FOR ALL ↗
- Who funds Museum of Modern Art ↗
- Who funds Marbletown First Aid Unit Inc ↗
- Who funds The New York Public Library Astor Lenox and Tilden Foundations ↗
- Who funds PRO PUBLICA 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: The Robert W Wilson Charitable Trust · Jpmorgan Chase Foundation · National Philanthropic Trust · The Bank of America Charitable Foundation Inc · Vanguard Charitable Endowment Program · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · 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 Tannen Family 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 or a single department — and drag the year to watch it move.
- People's Place Ii Inc — 51% 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 Tannen Family Foundation?
Find your warmest path to Tannen Family 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.