Skip to content

· 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.

$25k
Granted FY2025still arriving
49
Grants FY2025still arriving
14
States reached
$5k
Largest
01What it funds
0197% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Education$48kReligion$45kEnvironment$45kArts & Culture$42kHealth$30kHuman Services$17kInternational$11kCivil Rights$11kOther$0
02FY2025 · 49 grants

Where the money goes

Grants by size, and the largest recipients.

$400
Median grant
14
States reached
$404k
Total assets
Largest grants
RecipientAmount
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
PLANNED PARENTHOOD OF THE ROCKY MOUNTAINS$750
DANCEWAVE$750
INTERCAMBIO DE COMUNIDADES$700
PRO PUBLICA INC$600
DOCTORS WITHOUT BORDERS$550
PLANNED PARENTHOOD OF GREATER TEXAS$500
ROCKY MOUNTAIN PUBLIC MEDIA PHILANTHROPIC GIVING$500
Individual grant recipient$500
PLANNED PARENTHOOD FEDERATION OF AMERICA$500
BIRD CONSERVANCY OF THE ROCKIES$500
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its 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 its grants land in higher-need ZIPs.

area typical 10%CARING CHOICES: $500 → 18%BRIDGE HOUSE: $1k → 12%BRIDGE HOUSE: $750 → 12%BRIDGE HOUSE: $500 → 12%BRIDGE HOUSE: $400 → 12%BRIDGE HOUSE: $200 → 12%BRIDGE HOUSE: $200 → 12%BRIDGE HOUSE: $200 → 12%BRIDGE HOUSE: $200 → 12%BRIDGE HOUSE: $200 → 12%ENDING COMMUNITY HOMELESSNESS COALITION: $250 → 10%ENDING COMMUNITY HOMELESSNESS COALITION: $250 → 10%THE INNOCENCE PROJECT: $250 → 17%INTERCAMBIO DE COMUNIDADES: $2k → 12%INTERCAMBIO DE COMUNIDADES: $1k → 12%INTERCAMBIO DE COMUNIDADES: $1k → 12%INTERCAMBIO DE COMUNIDADES: $1k → 12%INTERCAMBIO DE COMUNIDADES: $1k → 12%INTERCAMBIO DE COMUNIDADES: $1k → 12%INTERCAMBIO DE COMUNIDADES: $1k → 12%INTERCAMBIO DE COMUNIDADES: $700 → 12%INTERCAMBIO DE COMUNIDADES: $700 → 12%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

NH
WA
MT
WI
NY
MA
OR
IA
PA
NJ
CT
CA
CO
VA
MD
AZ
DC
HI
LA
TX
FL
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

97%of every dollar goes to organizations it has funded before.
$249k · 66 repeat orgs$8k to everyone else

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

Re-uppedFunded once

Organizations

66
20

Total granted

$249k
$7k

Median revenue growth · since first grant

+21%
+24%

Still filing today

74%
80%

New vs renewed · share of each year

In FY2025, 92% of grant dollars renewed an existing relationship; $2k went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’17’18’19’20’21’22’23’24’25
EnvironmentEducationHuman ServicesHealthInternationalAnimalsOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). 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 INC
    9× · 2017–2025 · $19k · revenue +41%
  • LW
    LIGHTHOUSE WRITERS WORKSHOP INC
    9× · 2017–2025 · $11k · revenue +96%
  • ID
    INTERCAMBIO DE COMUNIDADES
    9× · 2017–2025 · $10k · revenue +26%

Funded once

  • HS
    HUMANE SOCIETY OF VENTURA COUNTY
    one grant, 2018 · $500 · revenue -45%
  • CW
    CITY WILD
    one grant, 2022 · $500
  • WT
    WE THE PROTESTERS INC
    one grant, 2020 · $500 · revenue -94%
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
World Wildlife Fund Inc

Wwf's mission is to conserve nature and reduce the most pressing threats to the diversity of life on earth. (continued on schedule o)

Environment
2
Rainforest Trust

Rainforest trust saves endangered wildlife and protects our planet by creating rainforest reserves through partnerships, community engagement, and donor support.

International
3
The Water Research Foundation

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…

Environment
4
Npr Foundation

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…

—
5
American Gas Association

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…

—
6
Native Plant Trust Inc

The organization's mission is to conserve and promote new england's native plants to ensure healthy, biologically diverse landscapes.

Environment
7
American Flood Coalition Inc

To drive transformational adaptation to protect communities across the country from higher seas, stronger storms, and more frequent flooding.

Environment
8
Cdp North America Inc

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…

Environment
9
World Resources Institute

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…

International
10
Friends of the Earth

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…

Environment
11
Environmental Investigation Agency

To establish and promote programs to protect the global climate, forests, wildlife and the natural environment, through research, advocacy, and investigation.

International
12
Asociacion Interamericana Para La Defensa Del Ambiente

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.

Crime & Legal
How this is measured
The grantee most central to the portfolio’s shape is We the Protesters Inc; 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.
04the grantee network

77 grantees tracked through their own filings, 2017–2026.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2026, 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.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
10
Early backer (in before they grew)
77/77
Grantees still filing
58/77
Grew since first funded

Where the money sits, by cause and then by grantee

WATCH TOWER BIBLE AND TRACT SOCIETY: $45,000 · OtherWATCH TOWER BIBLE AND TRACT SOCIETYDancewave Inc: $4,750 · OtherAMERICAN CIVIL LIBERTIES UNION FOUNDATION INC: $8,650 · OtherAMERICAN CIVIL LIBERTIES UNION FOUNDATION INC+56 more: $66,050 · Other+56 moreTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $23,250 · EducationTHE BOARD OF TRUSTEES…LIGHTHOUSE WRITERS WORKSHOP INC: $10,800 · EducationLIGHTHOUSE WRITERS WO…WESTOVER SCHOOL INC: $7,600 · EducationWESTOVER SCHOOL INCThe Trustees of Princeton University: $4,500 · EducationThe Trustees of Princ…President and Fellows of Harvard College: $2,550 · EducationMILTON ACADEMY: $2,100 · EducationUNIVERSITY OF COLORADO FOUNDATION: $1,800 · Education+2 more: $1,250 · EducationNATURAL RESOURCES DEFENSE COUNCIL INC: $18,500 · EnvironmentNATURAL RESOU…SAVE THE HARBORSAVE THE BAY INC: $8,450 · EnvironmentSAVE THE HARB…HIGH COUNTRY NEWS: $5,450 · EnvironmentHIGH COUNTRY …EARTHJUSTICE: $2,250 · EnvironmentEARTHJUSTICE+3 more: $750 · EnvironmentROCKY MOUNTAIN PLANNED PARENTHOOD INC: $9,950 · HealthROCKY MOUN…PLANNED PARENTHOOD FEDERATION OF AMERICA INC: $5,750 · HealthPLANNED PA…PLANNED PARENTHOOD OF WISCONSIN INC: $2,900 · HealthPLANNED PA…BOULDER COMMUNITY HEALTH FOUNDATION: $2,900 · HealthBOULDER CO…PLANNED PARENTHOOD OF GREATER TEXAS INC: $2,500 · HealthPLANNED PA…Estes Park Medical Center Foundation: $2,300 · HealthEstes Park…INTERCAMBIO DE COMUNIDADES: $10,250 · Human ServicesFREEDOM CENTER TEXAS: $3,750 · Human ServicesBridge House: $3,650 · Human Services+4 more: $1,750 · Human ServicesPRO PUBLICA INC: $7,650 · Arts & CultureWGBH Educational Foundation: $3,100 · Arts & CultureROCKY MOUNTAIN PUBLIC MEDIA INC: $2,500 · Arts & CultureCOLORADO PUBLIC TELEVISION: $1,600 · Arts & CultureDENVER ART MUSEUM: $1,050 · Arts & CultureMEDECINS SANS FRONTIERES USA INC: $4,250 · InternationalTHE UNION OF CONCERNED SCIENTISTS INC: $4,000 · InternationalOXFAM-AMERICA INC: $2,900 · InternationalSave The Children Federation Inc: $1,250 · InternationalWORLD CENTRAL KITCHEN INC: $1,000 · International+1 more: $250 · International
Other$124,450Education$53,850Environment$35,400Health$26,300Human Services$19,400Arts & Culture$15,900International$13,650

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $23,250 over 9y, 0.0% of budgetNATURAL RESOURCES DEFENSE COUNCIL INC: $18,500 over 9y, 0.0% of budgetLIGHTHOUSE WRITERS WORKSHOP INC: $10,800 over 9y, 0.1% of budgetINTERCAMBIO DE COMUNIDADES: $10,250 over 9y, 0.1% of budgetROCKY MOUNTAIN PLANNED PARENTHOOD INC: $9,950 over 9y, 0.0% of budgetAMERICAN CIVIL LIBERTIES UNION FOUNDATION INC: $8,650 over 9y, 0.0% of budgetSAVE THE HARBORSAVE THE BAY INC: $8,450 over 9y, 0.2% of budgetPRO PUBLICA INC: $7,650 over 9y, 0.0% of budgetWESTOVER SCHOOL INC: $7,600 over 9y, 0.0% of budgetPLANNED PARENTHOOD FEDERATION OF AMERICA INC: $5,750 over 9y, 0.0% of budgetHIGH COUNTRY NEWS: $5,450 over 7y, 0.0% of budgetDancewave Inc: $4,750 over 9y, 0.1% of budgetThe Trustees of Princeton University: $4,500 over 9y, 0.0% of budgetMEDECINS SANS FRONTIERES USA INC: $4,250 over 9y, 0.0% of budgetTHE UNION OF CONCERNED SCIENTISTS INC: $4,000 over 8y, 0.0% of budgetFREEDOM CENTER TEXAS: $3,750 over 9y, 0.1% of budgetBridge House: $3,650 over 9y, 0.0% of budgetCOMMUNITY FOOD SHARE INC: $3,250 over 7y, 0.0% of budgetWGBH Educational Foundation: $3,100 over 9y, 0.0% of budgetBOULDER AUDUBON SOCIETY Boulder County Audubon Society: $3,000 over 4y, 1.9% of budgetPLANNED PARENTHOOD OF WISCONSIN INC: $2,900 over 7y, 0.0% of budgetBOULDER COMMUNITY HEALTH FOUNDATION: $2,900 over 6y, 0.0% of budgetOXFAM-AMERICA INC: $2,900 over 9y, 0.0% of budgetPresident and Fellows of Harvard College: $2,550 over 9y, 0.0% of budgetPLANNED PARENTHOOD OF GREATER TEXAS INC: $2,500 over 5y, 0.0% of budgetROCKY MOUNTAIN PUBLIC MEDIA INC: $2,500 over 3y, 0.0% of budgetEstes Park Medical Center Foundation: $2,300 over 9y, 0.1% of budgetEARTHJUSTICE: $2,250 over 9y, 0.0% of budgetTHE NEW YORK TIMES COMMUNITIES FUND: $2,250 over 9y, 0.0% of budgetDENVER DUMB FRIENDS LEAGUE: $2,250 over 9y, 0.0% of budgetTHE UNIVERSITY OF TEXAS FOUNDATION INC: $2,250 over 9y, 0.0% of budgetWESTERN NATIONAL PARKS ASSOCIATION: $2,100 over 9y, 0.0% of budgetROCKY MOUNTAIN CONSERVANCY: $2,100 over 7y, 0.0% of budgetMILTON ACADEMY: $2,100 over 9y, 0.0% of budgetWELD COMMUNITY FOUNDATION: $2,050 over 4y, 0.0% of budgetCOMPASSION & CHOICES: $1,900 over 8y, 0.0% of budgetUNIVERSITY OF COLORADO FOUNDATION: $1,800 over 8y, 0.0% of budgetTexas Appleseed: $1,750 over 7y, 0.0% of budgetCOLORADO PUBLIC TELEVISION: $1,600 over 4y, 0.0% of budgetTHE NATURE CONSERVANCY: $1,500 over 3y, 0.0% of budgetNATIONAL IMMIGRATION LAW CENTER: $1,250 over 3y, 0.0% of budgetCentral Texas Food Bank Inc: $1,250 over 5y, 0.0% of budgetSave The Children Federation Inc: $1,250 over 4y, 0.0% of budgetDENVER ART MUSEUM: $1,050 over 4y, 0.0% of budgetHope For The Warriors: $1,000 over 4y, 0.0% of budgetTHE AMERICAN SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS: $1,000 over 4y, 0.0% of budgetSEED GLOBAL HEALTH: $1,000 over 2y, 0.0% of budgetWORLD CENTRAL KITCHEN INC: $1,000 over 4y, 0.0% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, 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 PLANNED PARENTHOOD OF WISCONSIN INC ↗
  • Who funds BOULDER COMMUNITY HEALTH FOUNDATION ↗
  • Who funds OXFAM-AMERICA INC ↗
  • Who funds President and Fellows of Harvard College ↗
  • Who funds PLANNED PARENTHOOD OF GREATER TEXAS INC ↗
  • Who funds ROCKY MOUNTAIN PUBLIC MEDIA INC ↗
  • Who funds Estes Park Medical Center Foundation ↗
  • Who funds EARTHJUSTICE ↗
  • Who funds THE NEW YORK TIMES COMMUNITIES FUND ↗
  • Who funds DENVER DUMB FRIENDS LEAGUE ↗
  • Who funds THE UNIVERSITY OF TEXAS FOUNDATION INC ↗
  • Who funds WESTERN NATIONAL PARKS ASSOCIATION ↗
  • Who funds ROCKY MOUNTAIN CONSERVANCY ↗
  • Who funds MILTON ACADEMY ↗
  • Who funds WELD COMMUNITY FOUNDATION ↗

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

Colorado Gives FoundationCO23.9× affinity11 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

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

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization Marianne and George Markham Foundation funds: left to right is the share of its income from government, bottom to top the share from Marianne and George Markham Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 30%0%1%3%5%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 7%
  • 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
no gov moneyreceives it· size = income
3get no government money at all
22report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
typical government reliance, FY20–25
How this is measured
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 a grant caused the public funding. Coverage is precision-first, a floor rather than 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 to 24 months.
05Through Plinth

Warm introductions · Powered by PlinthPlus

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.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 99 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990-PF e-file return for fiscal year 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Marianne and George Markham’s filings →

More from the funding graph