· Private foundation
The Ptarmigan Foundation Inc
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 FY2017–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k5 grants · $20k
- $10k–50k3 grants · $30k
- $50k–250k1 grant · $100k
| Recipient | Amount |
|---|---|
| STANFORD UNIVERSITY HOOVER INSTITUTION | $100,000 |
| THE HILL MUSEUM AND MANUSCRIPT LIBRARY | $10,000 |
| AMERICAN COUNCIL OF TRUSTEES AND ALUMNI | $10,000 |
| GEORGE WASHINGTON'S MOUNT VERNON | $10,000 |
| GEORGE MASON UNIVERSITY ANTONIN SCALIA LAW SCHOOL | $5,000 |
| THE GENERAL HENRY KNOX MUSEUM | $5,000 |
| MOUNT DESERT FESTIVAL OF CHAMBER MUSIC | $5,000 |
| THE JACKSON LABORATORY | $3,000 |
| THE PARISH OF ST MARY AND ST JUDE | $2,000 |
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.
Dollar for dollar, your grants (FY17–24) land where the poverty rate runs at 11%, against an area that typically sits at 8%. 57% of your 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 +23% for the ones you funded once.
11 repeat relationships — 8 still active in FY2024, 3 since wound down; 1 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, 93% of grant dollars renewed an existing relationship; $10k 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
- ACAMERICAN COUNCIL OF TRUSTEES AND ALUMNI8× · 2017–2024 · $80k · revenue +89%
- MDMount Desert Festival of Chamber Music4× · 2020–2024 · $38k · revenue +96% · 34% of their budget
- TJTHE JACKSON LABORATORY4× · 2021–2024 · $23k · revenue +14%
Funded once
- TGTHE GARDEN CLUB OF AMERICAgraduatedone grant, 2017 · $100k · revenue +49%
- AFAMERICANS FOR OXFORD INCone grant, 2019 · $100k · revenue +23%
- CCCHRIST CHURCH PARISH OF GEORGETOWNone grant, 2022 · $50k
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.
Undergraduate, graduate, and professional education and research across a broad array of academic domains.
The mission of the university of cambridge is to contribute to society through the pursuit of education, learning, and research at the highest international levels of excellence. organizationally, we achieve this through two divisions…
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.
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
The mission of the american college of the mediterranean is to provide excellence in international education, inspire intercultural awareness, and prepare students for success in a global community through the study of european and…
Rooted in the liberal arts & sciences & lutheran expression of the christian faith, & is committed to offering a challenging education that develops qualities of mind, spirit, & body necessary for a rewarding life of leadership & service…
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 mission of the george washington university (gw) is to educate individuals in liberal arts, languages, sciences, learned professions, and other courses and subjects of study, and to conduct scholarly research and publish the findings…
To graduate people of uncommon integrity, competence, and maturity, who are effective lifelong learners and responsible citizens, and who are prepared to contribute substantially to the world in which they live.
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…
Wilson college empowers students to be confident and critical thinkers, creative visionaries, effective communicators, honorable leaders, and agents of justice.
The broad mission of the ASCSA has remained constant over its distinguished history: teaching research archaeological exploration publication and dissemination of research. Founded in 1881 the ASCSA provides graduate students and scholars…
For reference, the grantee most central to the portfolio’s shape is The Mount Vernon Ladies' Association of the Union and the most unlike its peers is Mount Desert Festival of Chamber Music. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
12 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. 12 of the 24 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 BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY ↗
- Who funds THE GARDEN CLUB OF AMERICA ↗
- Who funds AMERICANS FOR OXFORD INC ↗
- Who funds AMERICAN COUNCIL OF TRUSTEES AND ALUMNI ↗
- Who funds HILL MUSEUM & MANUSCRIPT LIBRARY ↗
- Who funds The General Henry Knox Museum ↗
- Who funds Mount Desert Festival of Chamber Music ↗
- Who funds THE JACKSON LABORATORY ↗
- Who funds INSTITUTE FOR JUSTICE ↗
- Who funds THE CENTER FOR EDUCATION REFORM ↗
- Who funds JERUSALEM UNIVERSITY COLLEGE ↗
- Who funds THE MOUNT VERNON LADIES' ASSOCIATION OF THE UNION ↗
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: National Philanthropic Trust · Vanguard Charitable Endowment Program · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund
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 Ptarmigan Foundation Inc 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.
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 Ptarmigan Foundation Inc?
Find your warmest path to The Ptarmigan Foundation Inc 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.