Washington, D.C. · Nonprofit
NUCLEAR THREAT INITIATIVE INC
NUCLEAR THREAT INITIATIVE INC (Washington, D.C.) receives grants from 62 organizations whose IRS filings report $114,344,421 to it, the largest being THE SUSAN THOMPSON BUFFETT FOUNDATION ($42,001,980). 39 of them have funded it in more than one year.
- Revenue FY2025
- $17M
- Funders on record
- 62
- Grants received
- $114M
- Net assets
- $74M
What Nuclear Threat Initiative Inc does
Mission
Nuclear Threat Initiative (NTI) is a nonpartisan, nonprofit organization dedicated to reducing nuclear, biological, and emerging technology threats imperiling humanity. NTI works to transform global security by developing and advancing practical, system level solutions that reduce catastrophic risks. NTI carries out its mission through policy development, technical analysis, stakeholder engagement, and the convening of government leaders, technical experts, the private sector, and international organizations. NTI's work aims to prevent the spread and use of the world's most dangerous weapons and technologies, strengthen global norms and governance, and reduce the risk of large-scale harm to people and societies worldwide.
As stated on its FY2025 Form 990.
Programs
Biological Policy and Programs (NTI | bio). In 2025, NTI | bio reduced biological risks imperiling humanity by strengthening biotechnology governance, reducing the risk of bioweapon development and use, and fostering the next generation of global biosecurity leaders. The AIxBio Global Forum, launched by NTI | bio, emerged as the leading international platform for collective action to reduce risks at the intersection of AI and the life sciences (AIxBio). The Forum's High-Level Statement on Biosecurity Risks at the Convergence of AI and the Life Sciences, released in June 2025 with prominent signatories, outlined escalating AIxBio risks and called for urgent global action to establish policy and technical guardrails to prevent misuse of AIxBio capabilities while supporting innovation. During the Munich Security Conference, NTI convened senior policymakers, technologists, and security experts for a high-level tabletop exercise simulating an AI-enabled biological attack by an extremist group that resulted in a devastating pandemic. The resulting report, Safeguarding Against Global Catastrophe, delivered concrete actions for governments, industry, and philanthropic organizations,…
$4,848,646 spentof which $348,226 as grants28% of program spendingCommunications and Public Education (COMMS). With reports about possible resumption of nuclear weapons testing for the first time since 1992, NTI's Critical Mass project mobilized and expanded the Nevadans Against Nuclear Weapons Testing coalition, organized in 2024. Nevada is the only state with the infrastructure for testing, and the project helped to create a political bulwark against resumed testing, given strong bipartisan opposition to it in the state. NTI worked with business, tourism, conservation, and community groups, as well as veterans and other victims of past nuclear tests to pass a unanimous, bipartisan resolution in the state legislature urging the federal government to uphold the decades-long explosive nuclear weapons testing moratorium. Coalition members, including powerful interests like the Resort Association and Las Vegas Chamber of Commerce, testified for the resolution. After passage, it was transmitted to officials and Nevada's Congressional delegation in Washington. Knowing that popular culture drives public sentiment and ultimately public policy, NTI in 2025 deepened engagement with leaders in film and television to help shape how millions of people…
$4,132,924 spentof which $235,000 as grants24% of program spending2025 GNPP Accomplishments: In 2025, the Global Nuclear Policy Program led NTI's efforts to prevent the spread of nuclear weapons and reduce the risk of nuclear use. In an increasingly fraught geopolitical environment, NTI worked to build strategic stability in the U.S.-Russia-China nuclear relationships, strengthen global guardrails against the proliferation of nuclear weapons, and promote the conduct of unilateral fail-safe reviews to prevent the accidental or unauthorized use of a nuclear weapon. In April, NTI's paper, "Navigating Disruption in the Global Nuclear Order," shared findings and recommendations on reducing nuclear risks drawn from in-person and virtual meetings with experts across the United States, Europe, and Asia. NTI launched an innovative strategic stability dialogue with the Shanghai Institutes of International Studies to address U.S. and Chinese threat perceptions, nuclear policy and posture, and the increasingly complex strategic environment, which now includes advanced conventional weapons, a contested and militarized outer space domain, and the use of emerging technology like AI for military purposes. The dialogue will result in concrete recommendations for…
$3,623,940 spentof which $1,100,266 as grants21% of program spendingMaterials Risk Minimization Program (MRM).
$3,211,467 spent18% of program spendingFutureSafe: AI and Emerging Technologies
$851,168 spent5% of program spendingGovernment Relations
$579,613 spent3% of program spendingOther Program Services (Strategic Initiatives, and the Distinguished Fellows program)
$238,169 spent1% of program spending
The 7 programs described on its FY2025 Form 990, listed largest first by expense. Program spending in total: $17,485,927.
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 2018 to 2019, from $64M to $84M (+30%).
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: 2017 1% · 2018 1% · 2019 4% · 2020 7% · 2021 7% · 2022 8% · 2023 5% · 2024 2% · 2025 2%. Grants only. Government contracts and fees sit inside program revenue.
81% of NUCLEAR THREAT INITIATIVE INC’s revenue is contributions — about as donation-reliant as the typical peer (96% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 5 of the last 9 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
Christine E Wormuth
President and CEO, Board of Directors
As listed on its FY2025 Form 990.
The chief executive listed changed between the FY2024 and FY2025 filings.
Who funds it, year by year
2017 → 2023: the base broadened from 11 funders to 33 funders, grant income fell $16M → $16M.
17 of 62 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 27% 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 NUCLEAR THREAT INITIATIVE INC’s funders (the co-funder graph). Top 30 of 62 funders by total. 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
NUCLEAR THREAT INITIATIVE INC leans on a few funders — its largest provides 37% of grant income and the top three 70%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
27% 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 NUCLEAR THREAT INITIATIVE INC.
Largest funder’s share by year: 2017 43% · 2018 46% · 2019 67% · 2020 42% · 2021 45% · 2022 44% · 2023 49% — 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.
How long its funders stay
42% of NUCLEAR THREAT INITIATIVE INC's funders are still giving 3 years after their first grant; 63% 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
NUCLEAR THREAT INITIATIVE INC draws 100% of its grant income from funders outside Washington, D.C., across 13 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $30M arriving through sponsors registered in 13 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
NUCLEAR THREAT INITIATIVE INC is better cushioned than half of the 190 international nonprofits its size.
this organization peer median middle 50% of peers· 190 international nonprofits $10M–$100M, FY2025
Organizations like NUCLEAR THREAT INITIATIVE 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 Washington, D.C.
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
75% of spending goes to programs.
Governance
Public support
41%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 30 states
Screen this organization
A dated, signed PDF of the compliance screen for NUCLEAR THREAT INITIATIVE 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 NUCLEAR THREAT INITIATIVE INC?
- NUCLEAR THREAT INITIATIVE INC (Washington, D.C.) receives grants from 62 organizations whose IRS filings report $114,344,421 to it, the largest being THE SUSAN THOMPSON BUFFETT FOUNDATION ($42,001,980). 39 of them have funded it in more than one year.
- How many funders does NUCLEAR THREAT INITIATIVE INC have?
- IRS filings report 62 organizations giving $114,344,421 in grants to NUCLEAR THREAT INITIATIVE INC, 39 of which have funded it in more than one year.
- Who is the largest funder of NUCLEAR THREAT INITIATIVE INC?
- THE SUSAN THOMPSON BUFFETT FOUNDATION is the largest funder on record, with $42,001,980 in grants. The full list of funders is on this page.
- How can an organization like NUCLEAR THREAT INITIATIVE INC find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Washington, D.C.. 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 62 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 22, 2026. What this page cannot tell you · view filing