Massachusetts · Nonprofit
INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR
INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR (Massachusetts) receives grants from 20 organizations whose IRS filings report $523,697 to it, the largest being THE WILLIAM S ANHEUSER FAMILY FOUNDATION ($200,000). 6 of them have funded it in more than one year.
- Revenue FY2025
- $400k
- Funders on record
- 20
- Grants received
- $524k
- Net assets
- $629k
What International Physicians for the Prevention of Nuclear War does
Mission
The organization is engaged in research, education and advocacy on the medical and public health consequences of nuclear weapons and armed conflict. Volunteers advocate within their countries and at the un, they write and diseminate educational materials, participate in delegations and international dialogue and citizen diplomacy.
As stated on its FY2025 Form 990.
Programs
In pursuit of its mission to create a more peaceful and secure world without nuclear weapens, ippnw's main programs are: 1. International campaign to abolish nuclear weapons is educating the public, the media and decision-makers about the humanitarian impacts of nuclear weapons and advocating nuclear disarmament. 2. Medical student networking is encouraging the next generation of socially-responsible physicians to peace, disarmament, and a healthy planet.
$400,430 spent$388,517 earned by the program100% of program spendingOther program services, not described on the e-filed return.
$0 spent0% of program spending
The 2 programs described on its FY2024 Form 990, listed largest first by expense. Program spending in total: $400,430.
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.
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 $740k to $893k (+21%).
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.
93% of INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR’s revenue is contributions — about as donation-reliant as the typical peer (100% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 3 of the last 8 reported years ran a deficit.
reserve
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.
Chief executive
Michael Christ
Executive director
Board chair
Ruth Mitchell
Board chair
As listed on its FY2025 Form 990.
Who funds it, year by year
2017 → 2023: the base broadened from 4 funders to 8 funders, grant income rose $43k → $77k.
8 of 20 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 34% 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 INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR’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
INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR leans on a few funders — its largest provides 38% of grant income and the top three 63%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
45% 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 INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR.
Largest funder’s share by year: 2017 93% · 2018 77% · 2019 78% · 2020 50% · 2021 46% · 2022 33% · 2023 21% — 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.
How long its funders stay
25% of INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR's funders are still giving 3 years after their first grant; 30% give in more than one year at all.
Share of funders still giving k years after their first recorded grant, pooled across every acquisition cohort. A funder counts as retained in a year only if it made a grant that year. Measured to FY2023, the last fiscal year that has finished arriving — a funder cannot be counted as lapsed in a year most filers have not reached.
Where its funders are
INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR draws 96% of its grant income from funders outside Massachusetts, across 9 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $178k arriving through sponsors registered in 6 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.
Against its field
INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR is better cushioned than half of the 2,468 international nonprofits its size.
this organization peer median middle 50% of peers· 2,468 international nonprofits $100k–$1M, FY2025
Organizations like INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR
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 Massachusetts
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
83% of spending goes to programs.
Governance
Public support
96%
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 INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR: 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 INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR?
- INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR (Massachusetts) receives grants from 20 organizations whose IRS filings report $523,697 to it, the largest being THE WILLIAM S ANHEUSER FAMILY FOUNDATION ($200,000). 6 of them have funded it in more than one year.
- How many funders does INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR have?
- IRS filings report 20 organizations giving $523,697 in grants to INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR, 6 of which have funded it in more than one year.
- Who is the largest funder of INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR?
- THE WILLIAM S ANHEUSER FAMILY FOUNDATION is the largest funder on record, with $200,000 in grants. The full list of funders is on this page.
- How can an organization like INTERNATIONAL PHYSICIANS FOR THE PREVENTION OF NUCLEAR WAR find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Massachusetts. 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 International Physicians for the Prevention of Nuclear War →
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 20 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