California · Nonprofit
THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND
THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND (California) receives grants from 3 organizations whose IRS filings report $24,437 to it, the largest being The Humane Society of the United States ($9,869). 0 of them have funded it in more than one year.
Against its field
THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND's revenue grew 35% between 2017 and 2025.
this organization peer median middle 50% of peers· 3,681 education nonprofits $10M–$100M, FY2025
Three funders worth looking at
Grantmakers with no record of funding this organization, ranked by how strongly the co-funder graph and the mission embeddings agree. The evidence is in section 03.
- The Rachael Ray Foundationshared funders
- Halo Pet Foundationportfolio match
- The Legum Bangel Foundation Incportfolio match
The organization over time
Each line starts at 100 in 2017, so what you read is the shape rather than the size: 150 means half as much again as 2017, 50 means half. The number beside each label in the key is where it ended. The shaded band is where the middle 50% of its peers' revenue would sit, given their growth.
Who funds it, year by year
2020 → 2023: the base held at 1 funder, grant income fell $9k → $5k.
1 of 3 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 21% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
From the IRS filings of THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How concentrated its funding is
THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND leans on a few funders — its largest provides 40% of grant income and the top three 100%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
100% of the income these shares are computed over arrives through pass-through sponsors or from payers whose filings do not say what kind of payment it is. Concentration is still measured over all of it, because the money is real; what it does not support is a claim about how many institutions have chosen to fund THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND.
Largest funder’s share by year: 2020 100% · 2023 100% — broadly stable.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Where its funders are
THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND draws 51% of its grant income from funders outside California, across 2 states in all.
Funder states come from each funder’s own filing. $5k arriving through sponsors registered in 1 stateis excluded from the map and the split above: a sponsor holds money on a donor’s behalf, so its registered address would place those dollars somewhere no donor need ever have been. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Funders to approach
Grantmakers that don’t fund you yet, surfaced two ways: they back organizations that share your funders, or their grantees resemble your mission. The ones both signals agree on come first.
- The Rachael Ray Foundationshared fundersNY · backs 18 organizations that share your funders
- Halo Pet Foundationportfolio matchits grantees resemble your mission
- The Legum Bangel Foundation Incportfolio matchits grantees resemble your mission
- The Joyce E Haseotes Foundation Incportfolio matchits grantees resemble your mission
- The American Society for the Prevention of Cruelty to Animalsshared fundersNY · backs 78 organizations that share your funders
- Zoetis Foundation Incportfolio matchits grantees resemble your mission
- Brooks Institute for Animal Rights Law and Policy Incportfolio matchits grantees resemble your mission
- Alameda County Community Food BanklocalCA · funds 336 organizations near you
- Wallaby Foundation for Financial Assistaportfolio matchits grantees resemble your mission
- The Hoffman Foundation Incportfolio matchits grantees resemble your mission
- Pepper Whiston Foundationportfolio matchits grantees resemble your mission
- Angels and Causes Incportfolio matchits grantees resemble your mission
From the co-funder graph (funders backing at least two comparable organizations, shrunk for grantee count, donor-advised and mega-funds excluded) and the universe embeddings. A research starting point; overlap is association, not a guarantee of fit.
Organizations like THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND
Nonprofits whose mission and program text most resemble this one, by semantic similarity over the universe of US filings — the closest peers, and often the clearest route to shared or prospective funders.
In California
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Screen this organization
A dated, signed PDF of the compliance screen for THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND?
- THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND (California) receives grants from 3 organizations whose IRS filings report $24,437 to it, the largest being The Humane Society of the United States ($9,869). 0 of them have funded it in more than one year.
- How many funders does THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND have?
- IRS filings report 3 organizations giving $24,437 in grants to THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND.
- Who is the largest funder of THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND?
- The Humane Society of the United States is the largest funder on record, with $9,869 in grants. The full list of funders is on this page.
- How can an organization like THE DUFFIELD FAMILY FOUNDATION DBA MADDIE'S FUND find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in California. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2017–2025), and the filings of 3funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported August 27, 2026. What this page cannot tell you · view filing