California · Private foundation
The William C Bannerman Foundation
Its FY2026 filing reports that it accepted unsolicited grant applications.
- $443k
- Granted FY2026(still arriving)
- 29
- Grants FY2026
- 35
- Organizations funded FY2025
- 51%
- First-time grantees FY2025
- Median grant, FY2026
- $10,000
- Largest grant, FY2026
- $50,000
- Organizations funded a year
- 34 to 53
- FY2019 to FY2025
- States reached, FY2026
- 5
- Total assets, FY2026
- $4.6M
- Applications
- Takes unsolicited applications
- Per its most recent filing; check its own site
How open it is to new grantees
In FY2025, 51% of the organizations The William C Bannerman Foundation funded were first-time grantees, receiving 52% of its grant dollars.
New vs renewed · share of each year
In FY2025, 48% of grant dollars renewed an existing relationship; $230k 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 |
|---|---|---|---|
| FY2026still arriving | 28 | $443k | 29% |
| FY2025 | 35 | $442k | 51% |
| FY2024 | 34 | $430k | 47% |
| FY2023 | 40 | $473k | 25% |
| FY2022 | 39 | $477k | 28% |
| FY2021 | 53 | $451k | 21% |
| FY2020 | 49 | $447k | 47% |
| FY2019 | 42 | $350k | 48% |
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 FY2026, and the share of each one’s budget the grants supplied at peak.
| Grantee | Total granted | Years | Share of their budget |
|---|---|---|---|
| Center for Biological Diversity Inc | $196,000 | 10 | 0% |
| Onegeneration | $142,000 | 7 | 0% |
| Rainforest Action Network | $135,000 | 6 | 0% |
| Hightech La | $105,000 | 2 | 2% |
| Human-I-T | $97,500 | 5 | 0% |
| Trustees for Alaska | $80,000 | 6 | 1% |
| Food Finders Inc | $80,000 | 5 | 0% |
| Harmony Project | $77,500 | 5 | 0% |
| School on Wheels Inc | $75,000 | 7 | 1% |
| Para Los Ninos | $75,000 | 2 | 0% |
Show all 125 grantees
What it could do for these grantees
Plus 62 recipients with no EIN on record ($1.0M), not named here.
Where it is load-bearing
The William C Bannerman Foundation supplied at least a quarter of the budget for 1 of its grantees at some point. The chart plots its 108 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: The Ahmanson Foundation · The Annenberg Foundation · The Ralph M Parsons Foundation · California Community Foundation · The Rose Hills Foundation · Weingart Foundation · The Green Foundation · Elbridge Stuart Foundation Dba Stuart Foundation · S Mark Taper Foundation · Liberty Hill Foundation · Joseph Drown Foundation · United Way Inc
How this is measured
Compare The William C Bannerman Foundation with peer funders
Warm introductions · Powered by PlinthPlus
How do I get to The William C Bannerman Foundation?
Find your warmest path to The William C Bannerman 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 William C Bannerman Foundation
- How much does The William C Bannerman Foundation give?
- The William C Bannerman Foundation reported 29 grants totaling $443,000 in its FY2026 IRS filing. It funded between 34 and 53 organizations a year over FY2019 to FY2025.
- What does The William C Bannerman Foundation fund?
- By grant dollars over FY2017 to FY2026, its largest causes are Education (24%), Environment (24%), Human Services (9%).
- Who are The William C Bannerman Foundation's largest grantees?
- By total granted over FY2017 to FY2026: Center for Biological Diversity Inc ($196k), Onegeneration ($142k), Rainforest Action Network ($135k).
- Does The William C Bannerman Foundation fund new organizations?
- In FY2025, 51% of the organizations it funded were first-time grantees.
- Does The William C Bannerman Foundation accept unsolicited applications?
- Its most recent filing reports that it accepts unsolicited grant applications.
- Which funders back the same organizations as The William C Bannerman Foundation?
- Its strongest co-funders, measured against what their size predicts, include The Ahmanson Foundation, The Annenberg Foundation, The Ralph M Parsons Foundation.
- Where is The William C Bannerman Foundation based?
- The William C Bannerman Foundation is based in CA.
Play a game based on William C Bannerman’s filings →