Oklahoma · Nonprofit
THE GREATER SOUTHWEST HISTORICAL MUSEUM
THE GREATER SOUTHWEST HISTORICAL MUSEUM (Oklahoma) receives grants from 6 organizations whose IRS filings report $18,300 to it, the largest being JEROME WESTHEIMER FAMILY FOUNDATION ($8,000). 3 of them have funded it in more than one year.
Against its field
THE GREATER SOUTHWEST HISTORICAL MUSEUM is better cushioned than half of the 10,664 arts & culture nonprofits its size.
this organization peer median middle 50% of peers· 10,664 arts & culture nonprofits $100k–$1M, 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.
- Southern Oklahoma Memorial Foundation Incshared funderslocalportfolio match
- United Way of South Central Oklahoma Incshared funderslocal
- Oklahoma Humanities Council 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.
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 7% · 2021 5%. Grants only. Government contracts and fees sit inside program revenue.
90% of THE GREATER SOUTHWEST HISTORICAL MUSEUM’s revenue is contributions — more donation-reliant than the typical peer (64% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 3 of the last 9 reported years ran a deficit.
reserve
Who funds it, year by year
2018 → 2023: the base broadened from 1 funder to 3 funders, grant income rose $100 → $3k.
1 of 6 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 5% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
Left out of every figure on this page: $3.2M from one payer (the payer shares this organization's board, largest Southwest Historical Foundation). These are real filings, and they are not money THE GREATER SOUTHWEST HISTORICAL MUSEUM raised.
From the IRS filings of THE GREATER SOUTHWEST HISTORICAL MUSEUM’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 GREATER SOUTHWEST HISTORICAL MUSEUM leans on a few funders — its largest provides 44% of grant income and the top three 87%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
Largest funder’s share by year: 2018 100% · 2019 100% · 2020 100% · 2021 91% · 2022 100% · 2023 77% — diversifying over time.
“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
61% of THE GREATER SOUTHWEST HISTORICAL MUSEUM's grant income comes from Oklahoma funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $1k 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. Your 6 funders put you under-funded among the 126 organizations that share them.
- Southern Oklahoma Memorial Foundation Incshared funderslocalportfolio matchOK · backs 46 organizations that share your funders · funds 39 organizations near you · its grantees resemble your mission
- United Way of South Central Oklahoma Incshared funderslocalOK · backs 24 organizations that share your funders · funds 35 organizations near you
- Oklahoma Humanities Council Incportfolio matchits grantees resemble your mission
- Humanities Kansas Incportfolio matchits grantees resemble your mission
- Arkansas Humanities Councilportfolio matchits grantees resemble your mission
- Texas Historical Foundationportfolio matchits grantees resemble your mission
- James C and Teresa K Day Foundationportfolio matchits grantees resemble your mission
- Freedoms Frontier National Heritage Area Incportfolio matchits grantees resemble your mission
- American Historical Associationportfolio matchits grantees resemble your mission
- McCrory Foundationshared funderslocalOK · backs 43 organizations that share your funders · funds 50 organizations near you
- The Kelley Foundationshared funderslocalOK · backs 10 organizations that share your funders · funds 10 organizations near you
- Js & Wl Mullen Memorial Charitable Trustshared funderslocalOK · backs 5 organizations that share your funders · funds 6 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 THE GREATER SOUTHWEST HISTORICAL MUSEUM
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 Oklahoma
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
80% of spending goes to programs.
Governance
Public support
94%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for THE GREATER SOUTHWEST HISTORICAL MUSEUM: 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 GREATER SOUTHWEST HISTORICAL MUSEUM?
- THE GREATER SOUTHWEST HISTORICAL MUSEUM (Oklahoma) receives grants from 6 organizations whose IRS filings report $18,300 to it, the largest being JEROME WESTHEIMER FAMILY FOUNDATION ($8,000). 3 of them have funded it in more than one year.
- How many funders does THE GREATER SOUTHWEST HISTORICAL MUSEUM have?
- IRS filings report 6 organizations giving $18,300 in grants to THE GREATER SOUTHWEST HISTORICAL MUSEUM, 3 of which have funded it in more than one year.
- Who is the largest funder of THE GREATER SOUTHWEST HISTORICAL MUSEUM?
- JEROME WESTHEIMER FAMILY FOUNDATION is the largest funder on record, with $8,000 in grants. The full list of funders is on this page.
- How can an organization like THE GREATER SOUTHWEST HISTORICAL MUSEUM find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Oklahoma. 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 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