New York · Nonprofit
THE WARREN AND DENYSE MACKEY FOUNDATION INC
THE WARREN AND DENYSE MACKEY FOUNDATION INC (New York) receives grants from 6 organizations whose IRS filings report $45,000 to it, the largest being THE MITZEN FOUNDATION INC ($25,000). 0 of them have funded it in more than one year.
- Revenue FY2025
- $163k
- Funders on record
- 6
- Grants received
- $45k
- Net assets
- $240k
What The Warren and Denyse Mackey Foundation Inc does
Mission
support under served youth heart disease research
As stated on its FY2025 Form 990-EZ.
Programs
Support of heart disease reasearch and cancer wellness through risk identification and screening
$67,515 spentof which $37,000 as grants55% of program spendingSupport of youth in under served communities through educational ,athletic and religious activities and assistance as scholarship aid of 6675 to granting organizations
$54,717 spentof which $47,258 as grants45% of program spending
The 2 programs described on its FY2025 Form 990-EZ. Program spending in total: $122,232.
The organization over time
Each line starts at 100 in 2022, so what you read is the shape rather than the size: 150 means half as much again as 2022, 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 2022 to 2023, from $68k to $137k (+102%).
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.
24% of THE WARREN AND DENYSE MACKEY FOUNDATION INC’s revenue is contributions — about as donation-reliant as the typical peer (84% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 0 of the last 4 reported years ran a deficit.
Leadership and staff
Board chair
Denyse Mackey
Board Chairperson
As listed on its FY2025 Form 990-EZ.
Who funds it, year by year
2022 → 2023: the base broadened from 1 funder to 2 funders, grant income fell $25k → $2k.
From the IRS filings of THE WARREN AND DENYSE MACKEY 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
THE WARREN AND DENYSE MACKEY FOUNDATION INC leans on a few funders — its largest provides 56% of grant income and the top three 89%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
78% 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 WARREN AND DENYSE MACKEY FOUNDATION INC.
Largest funder’s share by year: 2022 100% · 2023 50% — 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
100% of THE WARREN AND DENYSE MACKEY FOUNDATION INC's grant income comes from New York funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. 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
THE WARREN AND DENYSE MACKEY FOUNDATION INC has grown faster than three-quarters of the 1,934 public benefit nonprofits its size.
this organization peer median middle 50% of peers· 1,934 public benefit nonprofits $100k–$1M, FY2025
Organizations like THE WARREN AND DENYSE MACKEY 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.
Public support
0%
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 WARREN AND DENYSE MACKEY 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 THE WARREN AND DENYSE MACKEY FOUNDATION INC?
- THE WARREN AND DENYSE MACKEY FOUNDATION INC (New York) receives grants from 6 organizations whose IRS filings report $45,000 to it, the largest being THE MITZEN FOUNDATION INC ($25,000). 0 of them have funded it in more than one year.
- How many funders does THE WARREN AND DENYSE MACKEY FOUNDATION INC have?
- IRS filings report 6 organizations giving $45,000 in grants to THE WARREN AND DENYSE MACKEY FOUNDATION INC.
- Who is the largest funder of THE WARREN AND DENYSE MACKEY FOUNDATION INC?
- THE MITZEN FOUNDATION INC is the largest funder on record, with $25,000 in grants. The full list of funders is on this page.
- How can an organization like THE WARREN AND DENYSE MACKEY 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 Warren and Denyse Mackey →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2022–2025), and the filings of 6 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