California · Private foundation
The Tom and Mayumi Adams Family Foundation
Its FY2025 filing reports that it accepted unsolicited grant applications.
- $151k
- Granted FY2025(still arriving)
- 17
- Grants FY2025
- 15
- Organizations funded FY2024
- 40%
- First-time grantees FY2024
- Median grant, FY2025
- $5,000
- Largest grant, FY2025
- $50,000
- Organizations funded a year
- 7 to 19
- FY2018 to FY2024
- States reached, FY2025
- 7
- Total assets, FY2025
- $2.3M
- Applications
- Takes unsolicited applications
- Per its most recent filing; check its own site
How open it is to new grantees
In FY2024, 40% of the organizations The Tom and Mayumi Adams Family Foundation funded were first-time grantees, receiving 35% of its grant dollars.
New vs renewed · share of each year
In FY2024, 65% of grant dollars renewed an existing relationship; $452k went to new ones.
Where new relationships form · theme of each grantee’s first grant
How this is measured
The numbers by year
| Fiscal year | Organizations funded | To those organizations | First-time grantees |
|---|---|---|---|
| FY2025still arriving | 17 | $151k | 41% |
| FY2024 | 15 | $1.3M | 40% |
| FY2023 | 11 | $893k | 27% |
| FY2022 | 10 | $969k | 30% |
| FY2021 | 11 | $907k | 45% |
| FY2020 | 7 | $1.8M | 14% |
| FY2019 | 19 | $376k | 26% |
| FY2018 | 16 | $379k | 50% |
What it funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.
Where its grants go
Grant dollars by states, across the years we hold.
Which US states its grants reach
Top grantees
Largest recipients by total granted, FY2017 to FY2025, and the share of each one’s budget the grants supplied at peak.
| Grantee | Total granted | Years | Share of their budget |
|---|---|---|---|
| Hoag Hospital Foundation | $3,560,000 | 8 | 1% |
| Irvine Barclay Theatre Operating Co | $120,000 | 4 | 1% |
| The Claremont Institute for the Study of Statesmanship & Political Philosophy | $61,000 | 6 | 0% |
| Fractured Atlas Inc | $50,000 | 1 | 0% |
| The Richard Nixon Foundation | $30,000 | 3 | 0% |
| Serving People In Need Inc | $28,000 | 7 | 0% |
| Children's Hospital Los Angeles | $25,000 | 1 | 0% |
| Justsoftball Foundation Corp | $25,000 | 1 | 26% |
| Ari J Arteaga Foundation Inc | $20,000 | 2 | 3% |
| The George W Bush Foundation | $15,000 | 3 | 0% |
Show all 26 grantees
What it could do for these grantees
Plus 22 recipients with no EIN on record ($3.1M), not named here.
Where it is load-bearing
The Tom and Mayumi Adams Family Foundation supplied at least a quarter of the budget for 1 of its grantees at some point. The chart plots its 22 largest grantees; load-bearing ones sit top left.
Tap a dot to name the grantee.
How this is measured
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.
Open a dossier: Argyros Family Foundation · Orange County Community Foundation · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile Foundation
How this is measured
Compare The Tom and Mayumi Adams Family Foundation with peer funders
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.
About The Tom and Mayumi Adams Family Foundation
- How much does The Tom and Mayumi Adams Family Foundation give?
- The Tom and Mayumi Adams Family Foundation reported 17 grants totaling $150,500 in its FY2025 IRS filing. It funded between 7 and 19 organizations a year over FY2018 to FY2024.
- What does The Tom and Mayumi Adams Family Foundation fund?
- By grant dollars over FY2017 to FY2025, its largest causes are Health (51%), Recreation & Sports (27%), Education (11%).
- Who are The Tom and Mayumi Adams Family Foundation's largest grantees?
- By total granted over FY2017 to FY2025: Hoag Hospital Foundation ($3.6M), Irvine Barclay Theatre Operating Co ($120k), The Claremont Institute for the Study of Statesmanship & Political Philosophy ($61k).
- Does The Tom and Mayumi Adams Family Foundation fund new organizations?
- In FY2024, 40% of the organizations it funded were first-time grantees.
- Does The Tom and Mayumi Adams Family Foundation accept unsolicited applications?
- Its most recent filing reports that it accepts unsolicited grant applications.
- Which funders back the same organizations as The Tom and Mayumi Adams Family Foundation?
- Its strongest co-funders, measured against what their size predicts, include Argyros Family Foundation, Orange County Community Foundation, Donor Advised Charitable Giving Inc.
- Where is The Tom and Mayumi Adams Family Foundation based?
- The Tom and Mayumi Adams Family Foundation is based in CA.
Play a game based on Tom and Mayumi Adams Family’s filings →