· Private foundation
Mariposa 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 $10k1 grant · $5k
- $10k–50k5 grants · $55k
- $50k–250k29 grants · $2.8M
- $250k+6 grants · $2.4M
| Recipient | Amount |
|---|---|
| AMERICAN MUSEUM NATURAL HISTORY | $600,000 |
| AMERICAN CIVIL LIBERTIES UNION | $500,000 |
| PROPUBLICA | $500,000 |
| NEO PHILANTHROPHY | $250,000 |
| INTERNATIONAL RESCUE COMMITTEE | $250,000 |
| NATURAL RESOURCES DEFENSE COUN | $250,000 |
| NEW YORK PRESBYTERIAN HOSPITAL | $200,000 |
| PLANNED PARENTHOOD FEDERATION | $200,000 |
| EVERYTOWN FOR GUN SAFETY | $150,000 |
| FOOD BANK FOR NEW YORK CITY | $150,000 |
| HOPEWELL FUND | $150,000 |
| OCEAN CONSERVANCY | $130,000 |
| CENTER FOR EDUCATIONAL INNOVATION | $100,000 |
| CENTER FOR HUMANE TECHNOLOGY | $100,000 |
| CITY HARVEST | $100,000 |
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.
Your human-services grants (FY17–24, $1.0M) land where the poverty rate runs at 19%, against an area that typically sits at 11%. 95% 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 +47% since the first grant, against +41% for the ones you funded once.
61 repeat relationships — 35 still active in FY2024, 26 since wound down; 3 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; $115k 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
NATURAL RESOURCES DEFENSE COUNCIL INC8× · 2017–2024 · $6.0M · revenue +41%
PRO PUBLICA INC8× · 2017–2024 · $1.9M · revenue +48%
ENVIRONMENTAL DEFENSE FUND INCORPORATED5× · 2019–2024 · $1.8M · revenue +139%
Funded once
SARAH LAWRENCE COLLEGEone grant, 2017 · $500k · revenue +14%- EGECHOING GREEN INCgraduatedone grant, 2017 · $100k · revenue +107%
- HHHERMITAGE HEART INCone grant, 2017 · $75k
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.
CITY REPORT, INC. serves the people of New York through independent journalism that answers their information needs and holds the powerful to account.
The open markets institute works to help people relearn how to use competition policy to build stronger democracies, more just and equitable societies, more innovative and sustainable economies, and a more secure and peaceful world.
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…
Friends of the earth strives for a more healthy and just world by defendng the environment and human health while advancing social and economic justice by conducting research and education, transforming the economy so it protects the…
Cdp north america, inc. 's ("cdp-na") vision for the future is a thriving economy that works for people and planet in the long term. we focus investors and companies on taking urgent action to build a truly sustainable economy by measuring…
The union of concerned scientists puts rigorous, independent science into action, developing solutions and advocating for a healthy, safe, and just future.
To create a nation where everyone enjoys a fair share of our collective prosperity.
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…
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
Climate group advances climate action by mobilizing business and government leadership to drive systemic decarbonization across energy, transport, and industry, while engaging the public through large-scale convenings and global platforms.…
The npr foundation ("foundation") is organized and operated exclusively for the benefit of its sole supported organization, national public radio, inc. ("npr inc."). the foundation supports npr inc. through various activities such as…
To educate students to be ethical and socially responsible leaders in a global community.
For reference, the grantee most central to the portfolio’s shape is The Queens Library Foundation Inc 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.
Your grantees are a median of 35 years old; the field is 14. You back the established end — and your money leans older still.
The field is 23% startups (under 5 years old) — 3% of your grantees by number, and just 1% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 14% 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.
80 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. 80 of the 109 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 NATURAL RESOURCES DEFENSE COUNCIL INC ↗
- Who funds American Museum of Natural History ↗
- Who funds READ TO LEAD INC ↗
- Who funds PRO PUBLICA INC ↗
- Who funds ENVIRONMENTAL DEFENSE FUND INCORPORATED ↗
- Who funds NEO Philanthropy Inc ↗
- Who funds PLANNED PARENTHOOD FEDERATION OF AMERICA INC ↗
- Who funds FOOD BANK FOR NEW YORK CITY ↗
- Who funds EVERYTOWN FOR GUN SAFETY SUPPORT FUND INC ↗
- Who funds Wildlife Conservation Society ↗
- Who funds AMERICAN CIVIL LIBERTIES UNION FOUNDATION INC ↗
- Who funds Make the Road New York ↗
- Who funds CITY HARVEST INC ↗
- Who funds OCEAN CONSERVANCY ↗
- Who funds THE CORPORATION OF YADDO ↗
- Who funds BRADY CENTER TO PREVENT GUN VIOLENCE ↗
- Who funds MEDECINS SANS FRONTIERES USA INC ↗
- Who funds GREEN CITY FORCE INC ↗
- Who funds International Rescue Committee INC ↗
- Who funds PURPOSE FOUNDATION ↗
- Who funds SARAH LAWRENCE COLLEGE ↗
- Who funds RED HOOK INITIATIVE ↗
- Who funds CENTER FOR POPULAR DEMOCRACY INC ↗
- Who funds WILLIAM J BRENNAN CENTER FOR JUSTICE INC ↗
- Who funds RIVERDALE COUNTRY SCHOOL INC ↗
- Who funds THE ALLEN-STEVENSON SCHOOL ↗
- Who funds BROWN UNIVERSITY ↗
- Who funds SAFE PASSAGE PROJECT CORPORATION ↗
- Who funds BROOKLYN COMMUNITY FOUNDATION ↗
- Who funds Center for Educational Innovation Inc ↗
- Who funds REPRODUCTIVE FREEDOM FOR ALL FOUNDATION ↗
- Who funds NEW VENTURE FUND ↗
- Who funds ASCENDUS INC ↗
- Who funds SD Foundation ↗
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 New York Community Trust · The Goldman Sachs Charitable Gift Fund · The Howard Gilman Foundation Inc · Select Equity Group Foundation · Robin Hood Foundation · Mother Cabrini Health Foundation Inc · Silicon Valley Community Foundation · The Vidda Foundation · Booth Ferris Foundation Xxxxx4008 · Pinkerton Foundation · The Jm Kaplan Fund Inc
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 Mariposa 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.
- Silver Hill Hospital 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 Mariposa Foundation Inc?
Find your warmest path to Mariposa 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.