· Private foundation
Marianne and George Markham 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 FY2017–2025.
Where the money goes
Your grants by size, and where they go.
| Recipient | Amount |
|---|---|
| WATCH TOWER BIBLE AND TRACT SOCIETY | $5,000 |
| AMERICAN CIVIL LIBERTIES UNION FDN | $1,150 |
| STANFORD UNIVERSITY | $1,000 |
| STANFORD UNIVERSITY LAW SCHOOL | $750 |
| NATURAL RESOURCES DEFENSE COUNCIL | $750 |
| DANCEWAVE | $750 |
| PLANNED PARENTHOOD OF THE ROCKY MOUNTAINS | $750 |
| INTERCAMBIO DE COMUNIDADES | $700 |
| PRO PUBLICA INC | $600 |
| DOCTORS WITHOUT BORDERS | $550 |
| WESTOVER SCHOOL | $500 |
| BOULDER COUNTY AUDUBON SOCIETY | $500 |
| WILDERNESS AWARENESS SCHOOL | $500 |
| BOULDER COUNTY NATURE ASSOCIATION | $500 |
| PRINCETON UNIVERSITY | $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 (FY17–25, $15k) land where the poverty rate runs at 12%, against an area that typically sits at 10%. 97% 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.
66 repeat relationships — 41 still active in FY2025, 25 since wound down; 4 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, 92% of grant dollars renewed an existing relationship; $2k 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 INC9× · 2017–2025 · $19k · revenue +41%- LWLIGHTHOUSE WRITERS WORKSHOP INC9× · 2017–2025 · $11k · revenue +96%
- IDINTERCAMBIO DE COMUNIDADES9× · 2017–2025 · $10k · revenue +26%
Funded once
- HSHUMANE SOCIETY OF VENTURA COUNTYone grant, 2018 · $500 · revenue -45%
- SCSIERRA CLUBone grant, 2017 · $500 · revenue -41%
- EFElectronic Frontier Foundation Incone grant, 2017 · $500 · revenue +24%
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.
Wwf's mission is to conserve nature and reduce the most pressing threats to the diversity of life on earth. (continued on schedule o)
Rainforest trust saves endangered wildlife and protects our planet by creating rainforest reserves through partnerships, community engagement, and donor support.
The purpose of the water research foundation (wrf) is a definitive research organization to advance the science of all things water to better meet the evolving needs of its subscribers and the water sector. to engage exclusively in…
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…
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…
The organization's mission is to conserve and promote new england's native plants to ensure healthy, biologically diverse landscapes.
To drive transformational adaptation to protect communities across the country from higher seas, stronger storms, and more frequent flooding.
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…
Wri is committed to creating change that improves people's lives and ensures the natural world can thrive. (see schedule o)wri's bold vision requires a formula for success we call "count it. change it. scale it.":- count it: our work is…
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…
To establish and promote programs to protect the global climate, forests, wildlife and the natural environment, through research, advocacy, and investigation.
To strenghten people's ability to guarantee their individual and collective right to a healthy environment, via the development, implementation, and effective enforcement of national and international law.
For reference, the grantee most central to the portfolio’s shape is We the Protesters Inc and the most unlike its peers is Dancewave Inc. 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 40 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 — 0.0% 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.
77 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. 77 of the 99 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 NATURAL RESOURCES DEFENSE COUNCIL INC ↗
- Who funds LIGHTHOUSE WRITERS WORKSHOP INC ↗
- Who funds INTERCAMBIO DE COMUNIDADES ↗
- Who funds ROCKY MOUNTAIN PLANNED PARENTHOOD INC ↗
- Who funds AMERICAN CIVIL LIBERTIES UNION FOUNDATION INC ↗
- Who funds SAVE THE HARBORSAVE THE BAY INC ↗
- Who funds PRO PUBLICA INC ↗
- Who funds WESTOVER SCHOOL INC ↗
- Who funds PLANNED PARENTHOOD FEDERATION OF AMERICA INC ↗
- Who funds HIGH COUNTRY NEWS ↗
- Who funds Dancewave Inc ↗
- Who funds The Trustees of Princeton University ↗
- Who funds MEDECINS SANS FRONTIERES USA INC ↗
- Who funds THE UNION OF CONCERNED SCIENTISTS INC ↗
- Who funds FREEDOM CENTER TEXAS ↗
- Who funds Bridge House ↗
- Who funds COMMUNITY FOOD SHARE INC ↗
- Who funds WGBH Educational Foundation ↗
- Who funds BOULDER AUDUBON SOCIETY Boulder County Audubon Society ↗
- Who funds BOULDER COMMUNITY HEALTH FOUNDATION ↗
- Who funds OXFAM-AMERICA INC ↗
- Who funds PLANNED PARENTHOOD OF WISCONSIN INC ↗
- Who funds President and Fellows of Harvard College ↗
- Who funds ROCKY MOUNTAIN PUBLIC MEDIA INC ↗
- Who funds PLANNED PARENTHOOD OF GREATER TEXAS INC ↗
- Who funds Estes Park Medical Center Foundation ↗
- Who funds THE NEW YORK TIMES COMMUNITIES FUND ↗
- Who funds DENVER DUMB FRIENDS LEAGUE ↗
- Who funds THE UNIVERSITY OF TEXAS FOUNDATION INC ↗
- Who funds EARTHJUSTICE ↗
- Who funds MILTON ACADEMY ↗
- Who funds WESTERN NATIONAL PARKS ASSOCIATION ↗
- Who funds ROCKY MOUNTAIN CONSERVANCY ↗
- Who funds WELD COMMUNITY 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: Colorado Gives Foundation · The Denver Foundation · Amg Charitable Gift Foundation · Ibm International Foundation · The Colorado Health Foundation · The Pfizer Foundation Inc · Community Foundation of Northern Colorado · Community Foundation Boulder County · Rose Community Foundation · Patagoniaorg · Greater Houston Community Foundation · Shell USA Company 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 Marianne and George Markham 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.
- Save the Children Federation Inc — 30% of income from government
- The Trustees of Princeton University — 11% of income from government
- President and Fellows of Harvard College — 7% of income from government
- Wgbh Educational Foundation — 1% of income from government
- Milton Academy — 0% of income from government
- Oxfam-America 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.
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How do I get to Marianne and George Markham Foundation?
Find your warmest path to Marianne and George Markham 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.