· Private foundation
The Tom and Mayumi Adams Family Foundation
Its FY2025 filing reports that it accepted unsolicited grant applications.
What you funded, over time
By grantee IRS cause code (NTEE).
A cause breakdown isn’t shown here: 45% of The Tom and Mayumi Adams Family Foundation’s grantee dollars fall outside its nine largest cause areas, whether because the recipient carries no IRS cause code or because its cause sits in the long tail. A chart would be mostly one residual band and misrepresent the portfolio.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k11 grants · $40k
- $10k–50k5 grants · $61k
- $50k–250k1 grant · $50k
| Recipient | Amount |
|---|---|
| Irvine Barclay Theatre | $50,000 |
| Huntington Beach Firefighters Assn | $16,000 |
| HB Police Officer Foundation | $15,000 |
| PB J Foods | $10,000 |
| Turning Point USA | $10,000 |
| Ari Arteaga Foundation | $10,000 |
| Tunnel to Towers Foundation | $6,000 |
| PSQ | $6,000 |
| Laguna Beach Police Community Found | $5,000 |
| National World War II Museum | $5,000 |
| University of Miami Athletics | $5,000 |
| Huntington Beach Sports Hall of Fam | $5,000 |
| Serving People in Need | $3,000 |
| City of Hope | $2,000 |
| Laguna Beach Police Foundation | $1,000 |
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 (FY18–25, $50k) land where the poverty rate runs at 12%, against an area that typically sits at 10%. 98% 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 +9% since the first grant, against +5% for the ones you funded once.
25 repeat relationships — 10 still active in FY2025, 15 since wound down; 7 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, 78% of grant dollars renewed an existing relationship; $33k 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
- HHHOAG HOSPITAL FOUNDATION8× · 2017–2024 · $3.6M · revenue +300%
- IBIRVINE BARCLAY THEATRE OPERATING CO4× · 2021–2025 · $120k · revenue +144%
- TCTHE CLAREMONT INSTITUTE FOR THE STUDY OF STATESMANSHIP & POLITICAL PHILOSOPHY6× · 2017–2024 · $61k · revenue +132%
Funded once
- SMSt Mary Magdalene Orthodox Churchone grant, 2024 · $400k
FRACTURED ATLAS INCone grant, 2023 · $50k · revenue +5%- CHChildren's Hospital Los Angelesone grant, 2022 · $25k · revenue +23%
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.
The central mission of the university of southern california is the development of human beings and society as a whole through the cultivation and enrichment of the human mind and spirit. the principal means by which our mission is…
The nstmf's mission is to build inclusive stem communities across the united states. fundamental to these communities are the significant, inspirational connections we foster between the individuals who have received national recognition…
Stanford university is one of a select group of american universities that have achieved eminence in both undergraduate and graduate education and research - cont'd sch o.
The institute for advanced study (the institute) is one of the world's leading centers for theoretical research and intellectual inquiry. see schedule o.
Chartered by a unanimous act of congress, the museum is america's national institution for the documentation, study, interpretation, and education of holocaust history and serves as our country's memorial to the victims of the holocaust.…
The ronald reagan presidential foundation and institute is the sole nonprofit organization created by president reagan charged with advancing his legacy and principles: individual liberty, economic opportunity, freedom and democracy, peace…
The fund for american studies (tfas) seeks to create a brighter, more prosperous future by preparing young people for leadership and teaching them the ideas of freedom and a free-market economy. founded in 1967, tfas organizes programs for…
Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.
The navy memorial mission is to honor, recognize and celebrate the men and women of the sea services and the important contributions made by them while serving in the united states navy, marine corps, coast guard and merchant marine. the…
The john f. kennedy presidential library and museum (the "library") is the nation's official memorial to the thirty-fifth president. the library, which was constructed with private funds donated by the public, is administered by the…
Nyu is a private university with approximately 60,000 matriculating students in 20 schools and institutes. nyu's primary missions are education, research and scholarship, and patient care.
Description of organization mission: the paley center for media is the premier institution dedicated to advancing the understanding of media-it's artistic value, social impact and historical importance-for the public and media…
For reference, the grantee most central to the portfolio’s shape is The Heritage Foundation and the most unlike its peers is The National World War Ii Museum 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 38 years old; the field is 14. You back the established end — and your money leans older still.
The field is 24% startups (under 5 years old) — 4% of your grantees by number, and just 1% of your money.
The orgs you fund almost never close — 4% 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.
27 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. 27 of the 50 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 HOAG HOSPITAL FOUNDATION ↗
- Who funds IRVINE BARCLAY THEATRE OPERATING CO ↗
- Who funds THE CLAREMONT INSTITUTE FOR THE STUDY OF STATESMANSHIP & POLITICAL PHILOSOPHY ↗
- Who funds FRACTURED ATLAS INC ↗
- Who funds HILLSDALE COLLEGE ↗
- Who funds UCLA FOUNDATION ↗
- Who funds THE RICHARD NIXON FOUNDATION ↗
- Who funds Serving People In Need Inc ↗
- Who funds Children's Hospital Los Angeles ↗
- Who funds JUSTSOFTBALL FOUNDATION CORP ↗
- Who funds ARI J ARTEAGA FOUNDATION INC ↗
- Who funds THE GEORGE W BUSH FOUNDATION ↗
- Who funds Laguna Beach Police Foundation ↗
- Who funds TURNING POINT USA INC ↗
- Who funds STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION ↗
- Who funds RESPECT 90 FOUNDATION ↗
- Who funds MEDIA RESEARCH CENTER ↗
- Who funds LAGUNA BEACH POLICE AND COMMUNITY FOUNDATION ↗
- Who funds THE NATIONAL WORLD WAR II MUSEUM INC ↗
- Who funds CLASSICS FOR KIDS 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: Argyros Family Foundation · Orange County Community Foundation · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile 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 The Tom and Mayumi Adams Family 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.
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 The Tom and Mayumi Adams Family Foundation?
Find your warmest path to The Tom and Mayumi Adams Family 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.