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The G Harold & Leila y Mathers Charitable Foundation at a glance

· Private foundation

The G Harold & Leila y Mathers Charitable Foundation

Its FY2024 filing reports that it accepted unsolicited grant applications.

$17M
Granted FY2024still arriving
103
Grants FY2024still arriving
14
States reached
$277k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
01100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Education$50MHealth$47MScience & Tech$21MSocial Science$976kRecreation & Sports$332kArts & Culture$159kFood & Nutrition$93kPublic Safety & Disaster$14kOther$0
02FY2024 · 103 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k6 grants · $37k
  • $10k–50k23 grants · $543k
  • $50k–250k54 grants · $12M
  • $250k+20 grants · $5.1M
$225,000
Median grant
14
States reached
$108M
Total assets
Largest grants
RecipientAmount
ROCKEFELLER UNIVERSITY$277,200
MASSACHUSETTS INSTITUTE OF TECHNOLOGY$270,000
YALE UNIVERSITY$268,534
CALIFORNIA INSTITUTE OF TECHNOLOGY$264,398
LELAND STANFORD JUNIOR UNIVERSITY$259,200
CHILDREN'S HOSPITAL CORP (BOSTON CHILDREN'S HOSPITAL)$256,184
CHILDREN'S HOSPITAL CORP (BOSTON CHILDREN'S HOSPITAL)$253,000
VANDERBILT UNIVERSITY MEDICAL CENTER$252,199
WHITE PLAINS HOSPITAL$250,000
CLEVELAND CLINIC FOUNDATION$250,000
WHITEHEAD INSTITUTE FOR BIOMEDICAL RESEARCH$250,000
CASE WESTERN RESERVE UNIVERSITY$250,000
PRESIDENT AND FELLOWS OF HARVARD COLLEGE$250,000
THE WISTAR INSTITUTE$250,000
ROCKEFELLER UNIVERSITY$250,000
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 (FY24–24, $1k) land where the poverty rate runs at 9%, against an area that typically sits at 10%. 0% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 10%SCARSDALE EDGEMONT FAMILY COUNSELING SERVICES: $1k → 9%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

WA
IL
MI
NY
MA
OH
PA
NJ
CT
CA
UT
MO
MD
KS
TN
NC
DC
GA
TX
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.

91%of every dollar goes to organizations it has funded before.
$87M · 68 repeat orgs$8.7M to everyone else

Grantees it renews have grown median revenue +44% since the first grant, against +30% for those funded once.

68 repeat relationships: 42 still active in FY2024, 26 since wound down; 6 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

68
33

Total granted

$87M
$7.7M

Median revenue growth · since first grant

+44%
+30%

Still filing today

49%
6%

New vs renewed · share of each year

In FY2024, 93% of grant dollars renewed an existing relationship; $971k went to new ones.

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

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

’17’18’19’20’21’22’23’24
EducationHealthScience & TechArts & CultureFood & NutritionRecreation & SportsOther
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

  • Dana-Farber Cancer Institute Inc
    8× · 2017–2024 · $8.6M · revenue +162%
  • CH
    Children's Hospital Corporation
    4× · 2021–2024 · $4.3M · revenue +60%
  • CI
    CALIFORNIA INSTITUTE OF TECHNOLOGY
    6× · 2018–2024 · $3.4M · revenue +0%

Funded once

  • MI
    MA INSTITUTE OF TECHNOLOGY
    one grant, 2018 · $1.1M
  • CF
    CTR FOR ACADEMIC RESRCH & TRAINING
    one grant, 2018 · $750k
  • CF
    CENTER FOR ACADEMIC RESEARCH & TRAINING IN ANTHROPOGENY
    one grant, 2019 · $750k
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
University of Miami

See Form 990, Part I, Line 1, Description of Organization Mission.

Education
2
Drexel University

Drexel university fulfills its founder's vision of preparing each new generation of students for productive professional and civic lives while also focusing its collective expertise on solving society's greatest problems. drexel is an…

Education
3
Cornell University

Education, research, medical services and other public services.

Education
4
Trustees of Dartmouth College

Dartmouth College educates the most promising students and prepares them for a lifetime of learning and of responsible leadership, through a faculty dedicated to teaching and the creation of knowledge.

Education
5
The Johns Hopkins Hospital

For more than 125 years, the mission of the johns hopkins hospital has been to lead the world in the diagnosis and treatment of disease and to train tomorrow's great physicians, nurses and scientists. above all, we aim to provide the…

Health
6
Western New England University

Western new england university, a comprehensive private institution with a tradition of excellence in teaching and scholarship and a commitment to service, awards undergraduate, master's, and doctoral degrees in various departments from…

Education
7
Albany College of Pharmacy and Health Sciences

We educate the next generation of leaders to improve the health of our society.

Education
8
Bar Ilan University in Israel Inc

Biu produces students who excel in the sciences, humanities, law, engineering, business & the arts.

—
9
Lehigh University

The university's goal in the coming decade is to advance learning through the integration of teaching, research and service to others. the core of this goal is to prepare graduates to engage with the world and lead lives of meaning. to do…

Education
10
Rush University Medical Center

The mission of Rush is to improve the health of the individuals and diverse communities we serve through the integration of outstanding patient care, education, research and community partnerships.

Health
11
Institute for Advanced Study - Louis Bamberger & Mrs Felix Fuld Foundation

The institute for advanced study (the institute) is one of the world's leading centers for theoretical research and intellectual inquiry. see schedule o.

Science & Tech
12
University of Minnesota Physicians

University of minnesota physicians serves as the integrated group practice for the university of minnesota medical school full-time faculty to provide the highest quality healthcare to patients and their families.university of minnesota…

Health
How this is measured
The grantee most central to the portfolio’s shape is Georgetown University; the most unlike its peers is Post-Garza County Ems. 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

48 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. 48 of the 115 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.

1
Load-bearing (≥25% of a budget)
4
Early backer (in before they grew)
48/48
Grantees still filing
43/48
Grew since first funded

Where the money sits, by cause and then by grantee

SALK INSTITUTE: $4,105,000 · OtherSALK INSTITUTEMEMORIAL SLOAN-KETTERING CANCER CENTER: $3,242,168 · OtherMEMORIAL SLOAN-KETTERING CANCER CENTERYALE UNIVERSITY: $3,225,725 · OtherYALE UNIVERSITYYALE UNIVERSITY: $2,450,964 · OtherYALE UNIVERSITY: $2,386,302 · OtherNEW YORK UNIVERSITY SCHOOL OF MEDICINE: $2,063,699 · OtherUNIVERSITY OF CALIFORNIA: $2,048,651 · OtherCLEVELAND CLINIC FOUNDATION: $1,844,640 · Other+63 more: $25,068,674 · Other+63 moreTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $6,648,066 · EducationTHE BOARD OF TRUSTEES OF THE LELAND STANF…THE ROCKEFELLER UNIVERSITY: $6,171,647 · EducationTHE ROCKEFELLER UNIVERSITYMassachusetts Institute of Technology: $5,624,143 · EducationMassachusetts Institute of TechnologyCALIFORNIA INSTITUTE OF TECHNOLOGY: $3,424,764 · EducationCALIFORNIA INSTITUTE OF TECHNOLOGYTHE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK: $3,190,528 · EducationTHE TRUSTEES OF COLUMBIA UNIVERSITY IN TH…TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA: $2,767,221 · EducationTRUSTEES OF THE UNIVERSITY OF PENNSYLVANI…DUKE UNIVERSITY: $2,171,488 · EducationPresident and Fellows of Harvard College: $2,049,428 · EducationNew York University: $1,851,398 · EducationYale University: $1,604,650 · EducationWASHINGTON UNIVERSITY: $1,565,999 · Education+13 more: $6,159,180 · Education+13 moreDana-Farber Cancer Institute Inc: $8,624,666 · HealthDana-Farber Cancer Ins…Children's Hospital Corporation: $4,277,513 · HealthChildren's Hospital Co…WHITEHEAD INSTITUTE FOR BIOMEDICAL RESEARCH: $3,308,040 · HealthWHITEHEAD INSTITUTE FO…THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY: $2,548,870 · HealthTHE WISTAR INSTITUTE O…Vanderbilt University Medical Center: $2,117,827 · HealthVanderbilt University …+7 more: $2,599,385 · Health+7 moreCOLD SPRING HARBOR LABORATORY: $2,808,655 · Science & TechThe Salk Institute for Biological Studies: $969,891 · Science & TechUniversity of Kansas Center for Research Inc: $569,548 · Science & TechNorthwestern University: $331,988 · Recreation & SportsLEVELLAND WALLACE THEATER: $52,500 · Arts & CultureCAPROCK CULTURAL ASSOCIATION INC: $39,000 · Arts & CultureSANTA BARBARA MEALS ON WHEELS INC: $82,500 · Food & NutritionSCARSDALEEDGEMONT FAM COUNSELING: $1,000 · Human Services
Other$46,435,823Education$43,228,512Health$23,476,301Science & Tech$4,348,094Recreation & Sports$331,988Arts & Culture$91,500Food & Nutrition$82,500Human Services$1,000

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

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetDana-Farber Cancer Institute Inc: $8,624,666 over 8y, 0.1% of budgetTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $6,648,066 over 8y, 0.0% of budgetTHE ROCKEFELLER UNIVERSITY: $6,171,647 over 7y, 0.2% of budgetMassachusetts Institute of Technology: $5,624,143 over 6y, 0.0% of budgetChildren's Hospital Corporation: $4,277,513 over 4y, 0.1% of budgetCALIFORNIA INSTITUTE OF TECHNOLOGY: $3,424,764 over 6y, 0.0% of budgetWHITEHEAD INSTITUTE FOR BIOMEDICAL RESEARCH: $3,308,040 over 8y, 0.7% of budgetTHE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK: $3,190,528 over 8y, 0.0% of budgetCOLD SPRING HARBOR LABORATORY: $2,808,655 over 7y, 0.3% of budgetTRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA: $2,767,221 over 6y, 0.0% of budgetTHE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY: $2,548,870 over 6y, 1.4% of budgetDUKE UNIVERSITY: $2,171,488 over 6y, 0.0% of budgetVanderbilt University Medical Center: $2,117,827 over 3y, 0.0% of budgetPresident and Fellows of Harvard College: $2,049,428 over 5y, 0.0% of budgetNew York University: $1,851,398 over 4y, 0.0% of budgetYale University: $1,604,650 over 1y, 0.0% of budgetWASHINGTON UNIVERSITY: $1,565,999 over 8y, 0.0% of budgetThe Salk Institute for Biological Studies: $969,891 over 3y, 0.3% of budgetTRUSTEES OF BOSTON COLLEGE: $849,934 over 6y, 0.0% of budgetTHOMAS JEFFERSON UNIVERSITY: $825,000 over 4y, 0.0% of budgetICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $818,538 over 4y, 0.0% of budgetWilliam Marsh Rice University: $692,161 over 3y, 0.0% of budgetBRANDEIS UNIVERSITY: $677,490 over 4y, 0.1% of budgetFred Hutchinson Cancer Center: $625,000 over 3y, 0.0% of budgetUniversity of Kansas Center for Research Inc: $569,548 over 4y, 0.1% of budgetGEORGETOWN UNIVERSITY: $492,407 over 3y, 0.0% of budgetBETH ISRAEL DEACONESS MEDICAL CENTER INC: $490,515 over 4y, 0.0% of budgetUniversity of Chicago: $450,000 over 3y, 0.0% of budgetHAUPTMAN-WOODWARD MEDICAL RESEARCH INSTITUTE INC: $429,254 over 3y, 2.2% of budgetJOSLIN DIABETES CENTER INC: $423,948 over 2y, 0.3% of budgetTrustees of Tufts College: $398,020 over 2y, 0.0% of budgetTHE SCRIPPS RESEARCH INSTITUTE: $366,668 over 2y, 0.0% of budgetNorthwestern University: $331,988 over 2y, 0.0% of budgetThe George Washington University: $300,000 over 2y, 0.0% of budgetWhite Plains Hospital Medical Center: $250,000 over 1y, 0.0% of budgetCASE WESTERN RESERVE UNIVERSITY: $250,000 over 1y, 0.0% of budgetUniversity of Michigan: $249,984 over 1y, 51% of budgetUNIVERSITY OF SOUTHERN CALIFORNIA: $240,666 over 1y, 0.0% of budgetThe Trustees of Princeton University: $150,000 over 1y, 0.0% of budgetHOSPICE OF SANTA BARBARA INC: $145,000 over 8y, 0.8% of budgetSANTA BARBARA MEALS ON WHEELS INC: $82,500 over 7y, 4.2% of budgetGARZA COUNTY HISTORICAL MUSEUM: $58,500 over 7y, 8.4% of budgetLEVELLAND WALLACE THEATER: $52,500 over 5y, 11% of budgetSOUTH PLAINS COLLEGE FOUNDATION: $40,000 over 6y, 1.0% of budgetCAPROCK CULTURAL ASSOCIATION INC: $39,000 over 7y, 15% of budgetJOHNS HOPKINS UNIVERSITY: $14,964 over 1y, 0.0% of budgetPOST-GARZA COUNTY EMS: $14,000 over 1y, 2.8% of budgetSCARSDALEEDGEMONT FAM COUNSELING: $1,000 over 1y, 0.1% 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 Dana-Farber Cancer Institute Inc ↗
  • Who funds THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY ↗
  • Who funds THE ROCKEFELLER UNIVERSITY ↗
  • Who funds Massachusetts Institute of Technology ↗
  • Who funds Children's Hospital Corporation ↗
  • Who funds CALIFORNIA INSTITUTE OF TECHNOLOGY ↗
  • Who funds WHITEHEAD INSTITUTE FOR BIOMEDICAL RESEARCH ↗
  • Who funds THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK ↗
  • Who funds COLD SPRING HARBOR LABORATORY ↗
  • Who funds TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA ↗
  • Who funds THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY ↗
  • Who funds DUKE UNIVERSITY ↗
  • Who funds Vanderbilt University Medical Center ↗
  • Who funds President and Fellows of Harvard College ↗
  • Who funds New York University ↗
  • Who funds Yale University ↗
  • Who funds WASHINGTON UNIVERSITY ↗
  • Who funds The Salk Institute for Biological Studies ↗
  • Who funds TRUSTEES OF BOSTON COLLEGE ↗
  • Who funds THOMAS JEFFERSON UNIVERSITY ↗
  • Who funds ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI ↗

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.

Montgomery Family Fou…Kenneth & Harle Montg…Vanguard Charitable E…Fidelity Investments …Amazonsmile Foundation
Montgomery Family Foundation IncGA15.7× affinity5 shared granteesties to 4 of 4Hover any node to trace its alignments.Compare side by side →

Open a dossier: Montgomery Family Foundation Inc · Kenneth & Harle Montgomery Foundation · Vanguard Charitable Endowment Program · Fidelity Investments Charitable Gift Fund · Amazonsmile 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 The G Harold & Leila y Mathers Charitable Foundation funds: left to right is the share of its income from government, bottom to top the share from The G Harold & Leila y Mathers Charitable Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%4%15%34%60%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 10%
  • Joslin Diabetes Center Inc: 35% of income from government
  • Massachusetts Institute of Technology: 35% of income from government
  • Trustees of Tufts College: 13% of income from government
  • Johns Hopkins University: 12% of income from government
  • Yale University: 12% of income from government
  • The Trustees of Princeton University: 11% of income from government
  • Children's Hospital Corporation: 10% of income from government
  • Brandeis University: 9% of income from government
  • President and Fellows of Harvard College: 7% of income from government
  • Whitehead Institute for Biomedical Research: 7% of income from government
  • Dana-Farber Cancer Institute Inc: 7% of income from government
  • Beth Israel Deaconess Medical Center Inc: 6% of income from government
  • Trustees of Boston College: 3% of income from government
no gov moneyreceives it· size = income
0get no government money at all
5report 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 The G Harold & Leila y Mathers Charitable Foundation?

Find your warmest path to The G Harold & Leila y Mathers Charitable 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 115 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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on G Harold & Leila y Mathers’ filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home