· Private foundation
The GDL 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.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2019–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k4 grants · $13k
- $10k–50k5 grants · $73k
| Recipient | Amount |
|---|---|
| Northfield Mount Herman School | $22,500 |
| Trustees of Tufts College | $20,000 |
| Jackson Hole Land Trust | $10,000 |
| Grand Teton National Park Fdn | $10,000 |
| Cornell University | $10,000 |
| Adam J Lewis Academy | $5,000 |
| University of Illinois Fdtn | $2,500 |
| Appalachian Mountain Club | $2,500 |
| Cornell Lab of Ornithology | $2,500 |
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 (FY19–19, $500) land where the poverty rate runs at 10%, against an area that typically sits at 8%. 100% 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 +46% since the first grant, against -21% for the ones you funded once.
10 repeat relationships — 8 still active in FY2025, 2 since wound down; 1 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, 97% of grant dollars renewed an existing relationship; $3k 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
Trustees of Tufts College5× · 2020–2025 · $130k · revenue +39%
NORTHFIELD MOUNT HERMON SCHOOL5× · 2021–2025 · $100k · revenue +46%
GRAND TETON NATIONAL PARK FOUNDATION5× · 2021–2025 · $90k · revenue +250%
Funded once
- UOUNIVERSITY OF TEXAS AT AUSTINone grant, 2020 · $40k
- GSGEOLOGICAL SOCIETY OF AMERICA FOUNDATIONone grant, 2019 · $15k · revenue -25%
- ARAMERICAN ROCK MECHANICS ASSOCIATION ARMA FOUNDATIONone grant, 2020 · $5k · revenue -99%
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 mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.
Advance science, engineering, and innovation throughout the world for the benefit of all. the world's largest multidisciplinary scientific society and a leading publisher of cutting-edge research through its science family of journals,…
The american astronomical society (aas), established in 1899, is the major organization of professional astronomers in north america. the basic objective of the aas is to promote the advancement of astronomy and closely related branches of…
Agu's mission is to advance and support an inclusive community of earth and space scientists and partners dedicated to discovery and solutions to societal challenges. agu seeks to catalyze discovery and solutions to scientific and societal…
We provide students, educators, practitioners, and partners with the resources they need to enter the field, develop their careers, and form professional friendships that can last a lifetime. through annual and ongoing programs, events,…
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…
American gas association's (the association) mission is to develop and advocate for informed, innovative, and durable policy that fulfills our nation's energy needs, environmental aspirations and economic potential. we are committed to…
Enhance the ability of actec members to provide the most efficient and highest quality services to their clients; develop qualified trust and estate counselors; improve and reform probate, trust and tax laws, procedures, and standards of…
See schedule ouniversity corporation for atmospheric research (ucar), on behalf of, and in cooperation with its member university members, is engaged in the management of long-term atmospheric and related research and educational…
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…
The primary mission of furman as a liberal arts institution is to provide a distinctive education in fine arts, humanities, social sciences, mathematics and the sciences, as well as selected professional disciplines.
To preserve the unique character and natural resources of harvard.
For reference, the grantee most central to the portfolio’s shape is Geological Society of America Foundation and the most unlike its peers is Grand Teton National Park Foundation. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
16 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. 16 of the 19 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 Trustees of Tufts College ↗
- Who funds NORTHFIELD MOUNT HERMON SCHOOL ↗
- Who funds GRAND TETON NATIONAL PARK FOUNDATION ↗
- Who funds JACKSON HOLE LAND TRUST ↗
- Who funds Cornell University ↗
- Who funds ADAM J LEWIS ACADEMY INC ↗
- Who funds JACKSON HOLE COMMUNITY HOUSING TRUST ↗
- Who funds University of Illinois Foundation ↗
- Who funds GEOLOGICAL SOCIETY OF AMERICA FOUNDATION ↗
- Who funds THE COMMUNITY FOUNDATION OF EASTERN CONNECTICUT INC ↗
- Who funds Appalachian Mountain Club ↗
- Who funds AMERICAN ROCK MECHANICS ASSOCIATION ARMA FOUNDATION ↗
- Who funds GEOLOGICAL SOCIETY OF AMERICA INC ↗
- Who funds Central Texas Food Bank Inc ↗
- Who funds WOMENS STORYBOOK PROJECT OF TEXAS ↗
- Who funds CONSPIRARE 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: Donor Advised Charitable Giving Inc · American Online Giving Foundation 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 The GDL 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.
- Trustees of Tufts College — 13% of income from government
- Appalachian Mountain Club — 1% 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 The GDL Foundation?
Find your warmest path to The GDL 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.