New York · Nonprofit
WALTER W NAUMBURG FOUNDATION INC
WALTER W NAUMBURG FOUNDATION INC (New York) receives grants from 2 organizations whose IRS filings report $183,810 to it, the largest being THE NEW YORK COMMUNITY TRUST ($138,810). 2 of them have funded it in more than one year, and 76% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2025
- $751k
- Funders on record
- 2
- Grants received
- $184k
- Net assets
- $8.3M
What Walter W Naumburg Foundation Inc does
Programs
Cello competition-35 participants were accepted into the preliminary round.
$227,591 spentConcerts-the organization held five concerts during the year.
$188,169 spentSupport of other organizations in the furtherance of foundation's mission.
$10,000 spent
The 3 programs described on its FY2024 Form 990-PF.
The organization over time
Each line starts at 100 in 2018, so what you read is the shape rather than the size: 150 means half as much again as 2018, 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.
Balance sheet
Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2020 to 2021, from $7.1M to $8.6M (+21%).
Leadership and staff
The officers, directors, trustees and key employees listed on each return. Joined and no longer listed compare each filing with the year before, matching people by surname and first initial; a year after a gap, or a roster under three people, has no comparison.
The chief executive listed changed between the FY2021 and FY2022 filings.
Who funds it, year by year
2020 → 2023: the base broadened from 1 funder to 2 funders, grant income rose $8k → $75k.
1 of 2 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 76% 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 WALTER W NAUMBURG FOUNDATION INC’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
WALTER W NAUMBURG FOUNDATION INC leans on a few funders — its largest provides 76% of grant income and the top three 100%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
76% 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 WALTER W NAUMBURG FOUNDATION INC.
Largest funder’s share by year: 2020 100% · 2021 100% · 2022 100% · 2023 90% — 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
76% of WALTER W NAUMBURG FOUNDATION INC'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 $45k that is directly attributable, 100% of it comes from New York funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $139k arriving through sponsors registered in 1 state 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.
Against its field
WALTER W NAUMBURG FOUNDATION INC's revenue grew 48% between 2018 and 2025.
this organization peer median middle 50% of peers· 4,237 philanthropy nonprofits $100k–$1M, FY2025
Organizations like WALTER W NAUMBURG FOUNDATION INC
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In New York
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 WALTER W NAUMBURG FOUNDATION INC: 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. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds WALTER W NAUMBURG FOUNDATION INC?
- WALTER W NAUMBURG FOUNDATION INC (New York) receives grants from 2 organizations whose IRS filings report $183,810 to it, the largest being THE NEW YORK COMMUNITY TRUST ($138,810). 2 of them have funded it in more than one year, and 76% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does WALTER W NAUMBURG FOUNDATION INC have?
- IRS filings report 2 organizations giving $183,810 in grants to WALTER W NAUMBURG FOUNDATION INC, 2 of which have funded it in more than one year.
- Who is the largest funder of WALTER W NAUMBURG FOUNDATION INC?
- THE NEW YORK COMMUNITY TRUST is the largest funder on record, with $138,810 in grants. The full list of funders is on this page.
- How can an organization like WALTER W NAUMBURG FOUNDATION INC find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in New York. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
Play a game about who funds Walter W Naumburg →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2018–2025), and the filings of 2 funders 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 October 14, 2026. What this page cannot tell you · view filing