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· Private foundation

Mayr George H - Main

Its FY2025 filing reports that it accepted unsolicited grant applications.

$1.4M
Granted FY2025still arriving
31
Grants FY2025still arriving
5
States reached
$100k
Largest
01What it funds
01100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2025.

Education$7.7MReligion$150k
02FY2025 · 31 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • $10k–50k19 grants · $645k
  • $50k–250k12 grants · $720k
$40,000
Median grant
5
States reached
$27M
Total assets
Largest grants
RecipientAmount
ST FRANCIS HS OF LA CANADA FLINTRIDGE$100,000
ROMANA CONVENT SECONDARY SCHOOL$70,000
CATHEDRAL HIGH SCHOOL$70,000
BISHOP MONTGOMERY HIGH SCHOOL$60,000
VERBUM DEI JESUIT HIGH SCHOOL$60,000
BISHOP AMAT MEMORIAL HIGH SCHOOL$60,000
LOYOLA MARYMOUNT UNIVERSITY$50,000
SACRED HEART HIGH SCHOOL$50,000
SAINT MARYS ACADEMY$50,000
DON BOSCO TECHNICAL INSTITUTE$50,000
FLINTRIDGE SACRED HEART ACADEMY$50,000
JUNIPERO SERRA HIGH SCHOOL A CORP$50,000
NOTRE DAME ACADEMY$45,000
POMONA CATHOLIC HIGH SCHOOL$40,000
HOLY CHILD JESUS$40,000
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:

Dollar for dollar, its grants (FY20–25) land where the poverty rate runs at 13%, against an area that typically sits at 10%. 92% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%JUNIPERO SERRA HIGH SCHOOL: $65k → 7%SANTA CLARA UNIVERSITY: $50k → 8%UNIVERSITY OF THE PACIFIC: $50k → 12%ST MARYS ACADEMY: $60k → 14%ST MARYS HIGH SCHOOL: $65k → 13%SACRED HEART HIGH SCHOOL WATERBURY: $60k → 12%HOLY CHILD JESUS: $60k → 14%ST ANTHONY HIGH SCHOOL: $80k → 14%HOLY CHILD JESUS: $50k → 14%SAINT MARYS ACADEMY: $50k → 14%SAINT MARY'S HIGH SCHOOL: $60k → 12%BISHOP AMAT MEMORIAL HIGH SCHOOL: $60k → 14%BISHOP AMAT MEMORIAL HIGH SCHOOL: $55k → 14%SACRED HEART HIGH SCHOOL: $65k → 14%SACRED HEART HIGH SCHOOL: $50k → 14%NOTRE DAME ACADEMY SCHOOLS FDN: $80k → 14%NOTRE DAME ACADEMY: $70k → 14%MARIANNE FROSTING CENTER: $70k → 14%MARIANNE FROSTIG CENTER OF EDUCATION: $50k → 14%MAYFIELD SENIOR SCHOOL OF THE HOLY CHILD: $80k → 14%MARANATHA HIGH SCHOOL: $50k → 14%THE WAVERLY SCHOOL: $50k → 14%BISHOP MONTGOMERY HIGH SCHOOL: $80k → 14%CATHEDRAL HIGH SCHOOL: $85k → 14%VERBUM DEI HIGH SCHOOL: $95k → 14%BISHOP MONTGOMERY HIGH SCHOOL: $60k → 14%CATHEDRAL HIGH SCHOOL: $70k → 14%VERBUM DEI JESUIT HIGH SCHOOL: $75k → 14%CATHEDRAL HIGH SCHOOL: $60k → 14%VERBUM DEI JESUIT HIGH SCHOOL: $60k → 14%CATHEDRAL HIGH SCHOOL: $60k → 14%VERBUM DEI HIGH SCHOOL: $60k → 14%DON BOSCO TECHNICAL INSTITUTE: $80k → 14%DON BOSCO TECHNICAL INSTITUTE: $80k → 14%MOUNT ALVERNO HIGH SCHOOL: $65k → 14%ROMANA CONVENT SECONDARY SCHOOL: $70k → 14%ROMANA CONVENT SECONDARY SCHOOL: $65k → 14%ST FRANCIS HIGH SCHOOL OF LA CANADA: $230k → 14%ST FRANCIS HIGH SCHOOL OF LA CANADA: $140k → 14%ST FRANCIS HS OF LA CANADA FLINTRIDGE: $100k → 14%FLINTRIDGE SACRED HEART ACADEMY: $75k → 14%ST FRANCIS HIGH SCHOOL OF LA CANADA: $75k → 14%ST FRANCIS HIGH SCHOOL OF LA CANADA: $60k → 14%LOYOLA MARYMOUNT UNIVERSITY: $125k → 14%LOYOLA MARYMOUNT UNIVERSITY: $110k → 14%LOYOLA MARYMOUNT UNIVERSITY: $80k → 14%LOYOLA MARYMOUNT UNIVERSITY: $70k → 14%JUNIPERO SERRA HIGH SCHOOL A CORP: $60k → 14%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.
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.

93%of every dollar goes to organizations it has funded before.
$7.3M · 41 repeat orgs$535k to everyone else

41 repeat relationships: 29 still active in FY2025, 12 since wound down; 2 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

41
11

Total granted

$7.3M
$395k

Median revenue growth · since first grant

+28%
+31%

Still filing today

27%
18%

New vs renewed · share of each year

In FY2025, 90% of grant dollars renewed an existing relationship; $140k went to new ones.

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

  • LM
    LOYOLA MARYMOUNT UNIVERSITY
    6× · 2020–2025 · $455k · revenue +40%
  • DB
    DON BOSCO TECHNICAL INSTITUTE
    6× · 2020–2025 · $315k · revenue +19%
  • MF
    MARIANNE FROSTIG CTR OF EDU THERAPY
    5× · 2021–2025 · $175k · revenue +41%

Funded once

  • MF
    MARIANNE FROSTING CENTER
    one grant, 2020 · $70k
  • SH
    SACRED HEART HIGH SCHOOL WATERBURY
    one grant, 2023 · $60k
  • TW
    THE WAVERLY SCHOOLgraduated
    one grant, 2020 · $50k · revenue +31%
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
Mount Marty University

Mount marty university, an academic community in the catholic benedictine liberal arts tradition, prepares students for a contemporary world of work, service to the human community, and personal growth. the institution is a private,…

Education
2
Saint Mary's College of California

Saint mary's college of california invites you to passionately embrace knowledge, the challenges of scholarship, and the capacity to make lasting change in the world. the foundation for this is our mission. to probe deeply the mystery of…

Education
3
Mount Mary University Inc

Mount mary university, an urban catholic university for women sponsored by the school sisters of notre dame, provides an environment for the development of the whole person. the university encourages leadership, integrity, and a deep sense…

—
4
Mitchell Hamline School of Law

Mitchell hamline school of law is an independent law school that advances its mission through a combination of legal education, public service, and community engagement. it is dedicated to preparing students to practice law, while also…

Education
5
Saint Martin's University

Saint martin's students learn to make a positive difference in their lives and in the lives of others through the interaction of faith, reason, and service. the university honors both the sacredness of the individual and the significance…

Education
6
University of the Sciences in Philadelphia

University of the sciences prepares students to become leaders, innovators, and skilled practitioners in the sciences, the health professions, and related disciplines. we deliver excellence in teaching, research, and service through a safe…

—
7
St Mary's University

St. marys university, as a catholic marianist university, fosters the formation of people in faith and educates leaders for the common good through community, integrated liberal arts and professional education, and academic excellence.

—
8
Augustana College

Rooted in the liberal arts & sciences & lutheran expression of the christian faith, & is committed to offering a challenging education that develops qualities of mind, spirit, & body necessary for a rewarding life of leadership & service…

Education
9
The Seven Hills School

The institution provides educational instruction and activities to students ranging from preschool through 8th grade.

—
10
University of New Haven

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…

Education
11
Vistamar School

Vistamar school empowers students, preparing them to contribute and excel in higher education and in life, and commits to: a broad and balanced program that challenges and engages students, building their individual skills and inspiring a…

Education
12
Flintridge Preparatory School

Learning with purpose in a diverse and nurturing community, flintridge prep students thrive in adolescence and grow as curious scholars, creative thinkers , empathetic leaders, and global citizens.

Education
How this is measured
The grantee most central to the portfolio’s shape is President-Board of Trustees Santa Clara College; the most unlike its peers is Notre Dame High School. 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

13 grantees tracked through their own filings, 2017–2025.

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 2025, not grant rows in a single year, so this will not match the grant count on the cover. 13 of the 54 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)
0
Early backer (in before they grew)
13/13
Grantees still filing
11/13
Grew since first funded

Where the money sits, by cause and then by grantee

ST FRANCIS HIGH SCHOOL OF LA CANADA: $585,000 · OtherST FRANCIS HIGH SCHOOL OF LA CANADACATHEDRAL HIGH SCHOOL: $340,000 · OtherCATHEDRAL HIGH SCHOOLDON BOSCO TECHNICAL INSTITUTE: $315,000 · OtherBISHOP MONTGOMERY HIGH SCHOOL: $275,000 · OtherST ANTHONY HIGH SCHOOL: $255,000 · OtherBISHOP AMAT MEMORIAL HIGH SCHOOL: $240,000 · OtherFLINTRIDGE SACRED HEART ACADEMY: $240,000 · OtherPOMONA CATHOLIC HIGH SCHOOL: $220,000 · Other+35 more: $3,795,000 · Other+35 moreLOYOLA MARYMOUNT UNIVERSITY: $455,000 · EducationLOYOLA MARYMOUNT UNIVE…MARIANNE FROSTIG CTR OF EDU THERAPY: $175,000 · EducationMARIANNE FROSTIG CTR O…HILLSIDE SCHOOL AND LEARNING CENTER: $165,000 · EducationHILLSIDE SCHOOL AND LE…MARANATHA HIGH SCHOOL: $165,000 · EducationMARANATHA HIGH SCHOOLMT ALVERNO HIGH SCHOOL: $165,000 · EducationMT ALVERNO HIGH SCHOOLUniversity of the Pacific: $150,000 · EducationUniversity of the Paci…MOUNT SAINT MARY'S UNIVERSITY INC: $100,000 · EducationMOUNT SAINT MARY'S UNI…PRESIDENT-BOARD OF TRUSTEES SANTA CLARA COLLEGE: $60,000 · Education+3 more: $125,000 · Education+3 more
Other$6,265,000Education$1,560,000

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

25%50%75%100%$10M$100Mgrantee revenue →↑ funder's share of their budgetLOYOLA MARYMOUNT UNIVERSITY: $455,000 over 6y, 0.0% of budgetDON BOSCO TECHNICAL INSTITUTE: $315,000 over 6y, 1.0% of budgetMARIANNE FROSTIG CTR OF EDU THERAPY: $175,000 over 5y, 0.7% of budgetHILLSIDE SCHOOL AND LEARNING CENTER: $165,000 over 6y, 3.8% of budgetMARANATHA HIGH SCHOOL: $165,000 over 6y, 0.3% of budgetMT ALVERNO HIGH SCHOOL: $165,000 over 4y, 1.1% of budgetUniversity of the Pacific: $150,000 over 5y, 0.0% of budgetMOUNT SAINT MARY'S UNIVERSITY INC: $100,000 over 4y, 0.0% of budgetPRESIDENT-BOARD OF TRUSTEES SANTA CLARA COLLEGE: $60,000 over 2y, 0.0% of budgetTHE WAVERLY SCHOOL: $50,000 over 1y, 0.5% of budgetMOUNT SAINT MARY'S UNIVERSITY: $40,000 over 2y, 0.0% of budgetMARLBOROUGH SCHOOL: $35,000 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 LOYOLA MARYMOUNT UNIVERSITY ↗
  • Who funds DON BOSCO TECHNICAL INSTITUTE ↗
  • Who funds MARIANNE FROSTIG CTR OF EDU THERAPY ↗
  • Who funds HILLSIDE SCHOOL AND LEARNING CENTER ↗
  • Who funds MARANATHA HIGH SCHOOL ↗
  • Who funds MT ALVERNO HIGH SCHOOL ↗
  • Who funds University of the Pacific ↗
  • Who funds MOUNT SAINT MARY'S UNIVERSITY INC ↗

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.

The Ahmanson FoundationCA41.5× affinity18 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Ahmanson Foundation · Carrie Estelle Doheny Foundation · The Rose Hills Foundation · Catholic Community Foundation of Los Angeles · California Community Foundation · Sempra Foundation · The Green Foundation · Farmers & Merchants Bank Foundation · For Inspiration and Recognition of Science and Technology (FIRST) · The Michael & Patricia Smith Foundation · United Way Worldwide · Orange County Community 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 Mayr George H - Main funds: left to right is the share of its income from government, bottom to top the share from Mayr George H - Main. Bigger dots raise more.

2025
’20’21’22’23’24’25
no gov · 00%0%1%3%5%funder's share of their income ↑0%4%8%11%15%share of the org’s income from government →median 0%
  • Mount Saint Mary's University Inc: 0% of income from government
no gov moneyreceives it· size = income
0get no government money at all
2report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–15%
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 Mayr George H - Main?

Find your warmest path to Mayr George H - Main 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 54 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

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