California · Nonprofit
Sonoma League for Historic Preservation
Sonoma League for Historic Preservation (California) receives grants from 6 organizations whose IRS filings report $42,309 to it, the largest being Gaia Fund ($17,500). 1 of them have funded it in more than one year, and 51% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
Against its field
Sonoma League for Historic Preservation is better cushioned than half of the 14,524 arts & culture nonprofits its size.
this organization peer median middle 50% of peers· 14,524 arts & culture nonprofits under $100k, FY2024
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.
- Women Giving as One Inclocalportfolio match
- Sonoma County Vintners Foundationlocalportfolio match
- Sonoma Valley Vintners & Growers Foundationlocalportfolio 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.
How it's funded, over time
Each bar is one year's revenue split into where it came from, and every bar is the same height — these are shares, not amounts, so a year that raised twice as much looks the same size. Hover a bar for the split.
Government-grant reliance: 2020 9% · 2023 11% · 2024 6%. Grants only. Government contracts and fees sit inside program revenue.
102% of Sonoma League for Historic Preservation’s revenue is contributions — more reliant on donations than three-quarters of its peers (78% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 5 of the last 7 reported years ran a deficit.
reserve
Who funds it, year by year
2017 → 2023: the base narrowed from 3 funders to 2 funders, grant income rose $4k → $9k.
2 of 6 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 51% 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 Sonoma League for Historic Preservation’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
Sonoma League for Historic Preservation leans on a few funders — its largest provides 41% of grant income and the top three 93%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
51% 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 Sonoma League for Historic Preservation.
Largest funder’s share by year: 2017 49% · 2018 100% · 2019 100% · 2020 100% · 2021 81% · 2022 100% · 2023 72% — growing more concentrated.
“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
51% of Sonoma League for Historic Preservation's grant income arrives through donor-advised or pass-through sponsors, whose addresses record where the money is held rather than where the donor is. Of the $21k that is directly attributable, 85% of it comes from California funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $22k arriving through sponsors registered in 2 states is 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. Your 6 funders put you under-funded among the 400 organizations that share them.
- Women Giving as One Inclocalportfolio matchCA · funds 45 organizations near you · its grantees resemble your mission
- Sonoma County Vintners Foundationlocalportfolio matchCA · funds 97 organizations near you · its grantees resemble your mission
- Sonoma Valley Vintners & Growers Foundationlocalportfolio matchCA · funds 43 organizations near you · its grantees resemble your mission
- Simon Blattner Family Foundationlocalportfolio matchCA · funds 31 organizations near you · its grantees resemble your mission
- Exchange Bank Foundationlocalportfolio matchCA · funds 34 organizations near you · its grantees resemble your mission
- Codding Foundationlocalportfolio matchCA · funds 25 organizations near you · its grantees resemble your mission
- The Vadasz Family Foundationlocalportfolio matchCA · funds 35 organizations near you · its grantees resemble your mission
- Myriad Consulting and Training Incportfolio matchits grantees resemble your mission
- Vintage Bmw Houseportfolio matchits grantees resemble your mission
- Historic Preservation Education Foundationportfolio matchits grantees resemble your mission
- Wingate Foundationportfolio matchits grantees resemble your mission
- Redwood Credit Union Community Fund InclocalCA · funds 55 organizations near you
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 Sonoma League for Historic Preservation
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.
Where the money goes
2% of spending goes to programs.
Governance
Public support
100%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Screen this organization
A dated, signed PDF of the compliance screen for Sonoma League for Historic Preservation: 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 Sonoma League for Historic Preservation?
- Sonoma League for Historic Preservation (California) receives grants from 6 organizations whose IRS filings report $42,309 to it, the largest being Gaia Fund ($17,500). 1 of them have funded it in more than one year, and 51% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does Sonoma League for Historic Preservation have?
- IRS filings report 6 organizations giving $42,309 in grants to Sonoma League for Historic Preservation, 1 of which have funded it in more than one year.
- Who is the largest funder of Sonoma League for Historic Preservation?
- Gaia Fund is the largest funder on record, with $17,500 in grants. The full list of funders is on this page.
- How can an organization like Sonoma League for Historic Preservation 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 FY2024 (financials across 2017–2024), and the filings of 6funders 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