Longview Philanthropy USA Inc
We exist to move as much impact-adjusted money as possible to those working to reduce catastrophic and existential risks. In practice, we promote effective philanthropy that reduces the risk of a major global catastrophe through three main types of activities: advising, grantmaking, and events.
Longview Philanthropy USA Inc at a glance
In short: Longview Philanthropy USA Inc gave $6.2M across 15 grants in 2025 (avg $412K), mostly in California. Source: 2025 IRS Form 990.
- Annual giving (2025)
- $6,187,483
- +1259.5% vs 2024
- Grants made (2025)
- 15
- +200.0% vs 2024
- Average grant
- $412,499
- +353.2% vs 2024
- Median grant
- $240,000
- Total assets
- $12,681,548
- +87.3% vs 2024
- Primary geography
- California (55% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990, 2025 View filing
Data from IRS Form 990, 2025; updated November 2026.
Who Longview Philanthropy USA Inc funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was Horizon Institute for Public Service ($1.6M). Together the top 10 received $5.9M.
Grant Size Distribution
20 grants across all recorded years
The most common grant size was in the $50–100K range: 7 grants of 20 (35%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 15 itemized grants.
States
Cities
How Longview Philanthropy USA Inc gives
- 13% of 2025 grantees were also funded in 2024. Method
Estimate from itemized grant lists in IRS Form 990 filings (2025). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2024 to 2025, annual grant giving ranged from $455K (2024) to $6.2M (2025). In 2025 it made 15 grants totaling $6.2M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Horizon Institute for Public Service Washington, DC | General Support | $1,600,000 |
| Rand Corporation Santa Monica, CA | General Support | $1,300,000 |
| Mats Research Inc Berkeley, CA | To fund an expansion of a training program for early-career ai safety researchers. | $1,052,000 |
| Rethink Priorities San Francisco, CA | To fund research and related work on ai systems. | $403,983 |
| Foundation for Secure Ai Inc San Francisco, CA | General Support | $400,000 |
| Center for Strategic & International Studies Inc Washington, DC | To fund a working group that researches nuclear weapons policy and educates the public. | $338,000 |
| Neuromatch Inc Beaverton, OR | To fund a training program for early-career ai safety researchers. | $310,000 |
| University of Pennsylvania Philadelphia, PA | To fund a research fellowship developing neuroscientific methods for assessing ai systems. | $240,000 |
| Model Evaluation and Threat Research Inc Covina, CA | General Support | $173,000 |
| Panoplia Laboratories Inc Cambridge, MA | Empirical Studies to Inform Biotechnology Governance Strategy | $97,000 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Net Investment Income |
|---|---|---|---|---|---|---|
| 2025 | $12,681,548 | $21,167,086 | $15,612,226 | $6,187,483 | 15 | $239,605 |
| 2024 | $6,771,088 | $10,007,719 | $3,269,897 | $455,128 | 5 | $8,659 |
About Longview Philanthropy USA Inc
Based on IRS filings
Longview Philanthropy USA Inc is a public charity, based in Claymont, DE. IRS filing data is available from 2024 through 2025. As of 2025, the organization holds $12.7M in total assets. In 2025, it awarded 15 grants totaling $6.2M. Net investment income was $240K.
Leadership & Key People
Officers and directors from IRS filings
Longview Philanthropy USA Inc is led by Natalie Cargill, President on every filing since 2024; 5 of 8 officers listed in 2025 are compensated.
Officers on the 2025 filing
Natalie Cargill
President
On filings since 2024
40 hrs/week
$19K (2024) → $99K (2025)
Carl Alexander Robichaud
Nuclear Weapons Program Director
On filings since 2024
40 hrs/week
$163K (2024) → $186K (2025)
Ben Millwood
Director
On filings since 2024
1 hr/week
No compensation reported
Justin Rockefeller
Director
On filings since 2024
1 hr/week
No compensation reported
Tyler Whitmer
Director
On filings since 2024
1 hr/week
No compensation reported
Andrew Player
Treasurer, Secretary & Head of Grants Management
On filings since 2024
40 hrs/week
$110K (2024) → $131K (2025)
Matthew Gentzel
Nuclear Weapons Policy Program Officer
On filings since 2024
40 hrs/week
$126K (2024) → $173K (2025)
Aidan O'Gara
Chief Communications Officer
New on the 2025 filing
40 hrs/week
$199K (2025)
Former officers (1)
- Former: Olivia Boeree (2024) — Chief Communications Officer · Filing note: Thru 112024
Data from IRS Form 990 filings, 2024–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2025 IRS filing
The highest reported compensation on the 2025 filing was $199K, to Aidan O'Gara (Chief Communications Officer). 5 officers or directors reported compensation on that filing.
Frequently asked questions about Longview Philanthropy USA Inc
How much does Longview Philanthropy USA Inc give each year?
Longview Philanthropy USA Inc gave $6.2M across 15 grants in 2025, according to its 2025 IRS Form 990. In 2024 it gave $455K across 5 grants.
What is Longview Philanthropy USA Inc's typical grant size?
Longview Philanthropy USA Inc's median grant in 2025 was $240,000, and its average grant was $412,499, across 15 grants on its 2025 IRS Form 990.
Where does Longview Philanthropy USA Inc give grants?
Longview Philanthropy USA Inc gives mostly in California: 55% of the grant dollars itemized on its 2025 IRS Form 990 went to recipients there. The next largest states were District of Columbia (32%) and Oregon (5%). The most frequent recipient cities were Washington, DC (4 grants) and San Francisco, CA (3 grants).
Does Longview Philanthropy USA Inc give general operating support?
Yes: 47% of Longview Philanthropy USA Inc's 2025 grants with a stated purpose (7 of 15) were for general or operating support, per its 2025 IRS Form 990.
Who are Longview Philanthropy USA Inc's largest grantees?
Longview Philanthropy USA Inc's largest 2025 grantees include Horizon Institute for Public Service ($1,600,000), Rand Corporation ($1,300,000) and Mats Research Inc ($1,052,000), according to its 2025 IRS Form 990. Together they received 64% of its itemized 2025 grant dollars.
How large is Longview Philanthropy USA Inc?
Longview Philanthropy USA Inc reported $12.7M in total assets on its 2025 IRS Form 990. Its revenue that year was $21.2M.
What is Longview Philanthropy USA Inc's EIN?
Longview Philanthropy USA Inc's EIN (Employer Identification Number) is 93-2664730. IRS Form 990 filing data is available on this page for 2024–2025.
Data last updated November 2026. Sourced from IRS Form 990 filings.
Data update history
(2)
When this profile's IRS filing data changed on Grantable
- Added Form 990 for fiscal year 2024 (received by the IRS November 13, 2025)
- Added Form 990 for fiscal year 2025 (received by the IRS September 18, 2026)
Other open foundation grants in Delaware
Delaware Open opportunities, soonest deadline first.
- Andy Peek Livestock Endowed Scholarship Fund (Community Foundation of the North State) Due November 4, 2026
- CES Dissertation Fellowship $40,000 stipend (9-month) · Due December 1, 2026
- CSBS Education Foundation Graduate Banking and Graduate Trust School Scholarship Award Up to $3,000 · Due December 11, 2026
Explore Open Grants
Browse active grant opportunities in Longview Philanthropy USA Inc's focus areas in our free grants database
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The filing figures on this page are open data under CC BY 4.0. About GrantGraph Open
Figures come from Longview Philanthropy USA Inc's IRS filings (methodology). AI-written summaries, news items and logos are not covered by the open licence. Spot an error? Email hello@grantable.co.
Longview Philanthropy USA Inc down — hundreds of funders to go?