· Private foundation
Donald Grant & Ann Martin Calder Foundat
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 clustered by its grantee’s IRS cause code (NTEE), by year — across FY2017–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k8 grants · $16k
- $10k–50k3 grants · $76k
| Recipient | Amount |
|---|---|
| ATLANTIC SALMON FOUNDATION | $36,000 |
| RUSH UNIVERSITY SYSTEM FOR HEALTH | $25,000 |
| NATIONAL SPORTING LIBRARY | $15,000 |
| JUPITER ISLAND MEDICAL CLINIC | $5,000 |
| JUPITER ISLAND ARTS COUNCIL | $5,000 |
| MARINA ORTH FOUNDATION | $2,000 |
| IRISH GEORGIAN SOCIETY | $1,000 |
| AMERICAN UNIVERSITY OF PARIS | $1,000 |
| 1000 FRIENDS OF FLORIDA | $1,000 |
| AFS INTERCULTURAL PROGRAMS USA | $500 |
| ST ANDREW'S DUNE CHURCH | $200 |
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, $10k) land where the poverty rate runs at 10%, against an area that typically sits at 10%. 0% 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.
Where the work is directed
The same grants, placed two ways — where each recipient sits, and where its stated purpose earmarks the money.
About 17% of Donald Grant & Ann Martin Calder Foundat’s grant dollars are earmarked, by their stated purpose, for a different county than the recipient’s own address — money that lands at a nonprofit in one place but is meant to do its work in another.
Recipient view: each grant at its grantee’s ZIP, mapped to a county. Directed view: each grant at the county its stated purpose names, falling back to the recipient’s county when the purpose names no place; US grants only. A county shows only if it carries the top 95% of that view’s dollars. Purposes are read from the foundation’s own 990 grant descriptions.
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 +33% since the first grant, against +17% for the ones you funded once.
50 repeat relationships — 8 still active in FY2025, 42 since wound down; 3 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, 71% of grant dollars renewed an existing relationship; $27k 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
- TNTHE NATIONAL SPORTING LIBRARY AND MUSEUM9× · 2017–2025 · $305k · revenue +223%
THE EVERGLADES FOUNDATION INC7× · 2017–2024 · $223k · revenue +226%
Atlantic Salmon Federation (US) Inc2× · 2017–2018 · $125k · revenue +278%
Funded once
- TSTHE SOUTHAMPTON GARDEN CLUB INCone grant, 2019 · $60k · revenue -32% · 61% of their budget
- MCMAYO CLINICone grant, 2022 · $25k
- TATHE ALOHA FOUNDATION INCone grant, 2023 · $10k · revenue +0%
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.
Saint andrew's school is an independent school founded in the episcopal tradition. our mission is to build a community of learners, provide excellence in education, and nurture each student in mind, body, and spirit.
Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.
To preserve the unique character and natural resources of harvard.
The nantucket conservation foundation owns, protects, and stewards over 9,000 acres of land and coastal shoreline, conserves nantucket's rare and significant natural resources, and engages in impactful ecological research to inform…
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
The mission of south shore charter school is to cultivate students the tenacity, integrity, and curiosity needed to become innovative and socially responsible leaders, ready to face and solve the ever-changing challenges facing our…
The institutes mission is to cultivate a responsibility for the natural environment and our human communities through interdisciplinary science education.
The mission of rhode island school of design, through its college and museum,is to educate its students and the public in the creation and (see schedule o)appreciation of works of art and design, to discover and transmit knowledge and to…
Sfs creates transformative study abroad experiences through field-based learning and research. our educational programs explore the human and ecological dimensions of the complex environmental problems faced by our local partners,…
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…
Our mission is to act to conserve threatened species and ecosystems worldwide, choosing solutions that are sustainable, based on sound science and take into account human needs.
Bates is a college of the liberal arts and sciences, and is a coeducational, nonsectarian, residential college with special commitments to academic rigor, and to assuring in all of its efforts the dignity of each individual, and access to…
For reference, the grantee most central to the portfolio’s shape is The Southampton Hospital Foundation Inc and the most unlike its peers is The Andrew K Dwyer Foundation. 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 34 years old; the field is 16. You back the established end — and your money leans older still.
The field is 22% startups (under 5 years old) — 0% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 2% lost their exemption, against 13% 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.
54 grantees tracked through their own filings, 2017–2026.
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 2017–2026, not grant rows in a single year — so this will not match the grant count on the cover. 54 of the 81 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 MYRIAD USA INC ↗
- Who funds THE NATIONAL SPORTING LIBRARY AND MUSEUM ↗
- Who funds THE EVERGLADES FOUNDATION INC ↗
- Who funds Atlantic Salmon Federation (US) Inc ↗
- Who funds THE SOUTHAMPTON HOSPITAL FOUNDATION INC ↗
- Who funds THE SOUTHAMPTON GARDEN CLUB INC ↗
- Who funds Jupiter Medical Center Foundation Inc ↗
- Who funds THE BANNER LAKE CLUB INC ↗
- Who funds THE GARDEN CONSERVANCY INC ↗
- Who funds HOBE SOUND NATURE CENTER INC ↗
- Who funds JUPITER ISLAND MEDICAL CLINIC INC ↗
- Who funds HOBE SOUND COMMUNITY CHEST INC ↗
- Who funds SSE ALUMNI USA INC ↗
- Who funds The Trustees of Princeton University ↗
- Who funds BONEFISH & TARPON TRUST INC ↗
- Who funds THE GUARDIANS OF MARTIN COUNTY INC ↗
- Who funds Wellness Foundation ↗
- Who funds BOYS & GIRLS CLUB OF MARTIN COUNTY ↗
- Who funds ST PAUL'S SCHOOL ↗
- Who funds CENTER FOR INTERFAITH RELATIONS ↗
- Who funds SOUTHAMPTON ASSOCIATION INC ↗
- Who funds VETERINARY INITIATIVE FOR ENDANGERED WILDLIFE INC ↗
- Who funds THE ALOHA FOUNDATION INC ↗
- Who funds THE COMMIT FOUNDATION ↗
- Who funds NAVY SEAL FOUNDATION INC ↗
- Who funds MARINA ORTH FOUNDATION ↗
- Who funds 1000 FRIENDS OF FLORIDA INC ↗
- Who funds JUPITER ISLAND GARDEN CLUBINC ↗
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: Legatus Foundation · St Clair Charitable Trust · CMB Foundation · Ethel D Colket Foundation · Colket Family Foundation · The David and Elizabeth Long Foundation · The Krimendahlsaint-Amand Foundation · The Patton Charitable Foundation · The Bessemer Giving Fund · Hugh and Patricia Okane Foundation Co Hugh Okane · Stephanie & Lawrence Flinn Jrcharitable Trust · Madigan Family 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 Donald Grant & Ann Martin Calder Foundat 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.
- The Trustees of Princeton University — 11% of income from government
- Boys & Girls Club of Martin County — 2% of income from government
- The Banner Lake Club Inc — 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.