Trace

Longview Philanthropy

www.longview.org · foundation · Longview, Longview Philanthropy USA Inc.

Total granted
$424,000,000
Grants
85
Average size
$8,313,725
of 51 with a disclosed amount
Coverage
2%
itemized by recipient
Years active
2018–26

Grants over time

$0$100M$200M$300M201820192020202120222023202420252026

Biggest cause areas

AI safety$303,328,15772%9
Biosecurity$59,500,00014%13
Other existential risk$58,407,28614%15
Other$1,092,7140%5
AI governance, policy, and advocacy$1,071,8430%5
Technical AI safety research$495,0000%5
AI safety fieldbuilding$55,0000%1
AI safety adjacent$50,0000%1

Biggest recipients

Consortium to Reduce Nuclear Dangers - first funding round (aggregate, ~25+ recipients undisclosed)$5,400,0001%1
Six EU civil society organisations (aggregate; EU AI Act Emergency Support)$733,0000%1
Massachusetts Institute of Technology$600,0000%1
Rethink Priorities$249,0000%2
METR$220,0000%1
Centre for Long-Term Resilience$150,0000%1
Horizon Institute for Public Service$150,0000%1
Harvard University$110,0000%1

Grants received 19 · $45,663,365 · $2,686,080 average

DateFunderViaAmountCauseSourcePurpose
Jun 2025Coefficient Giving$4,000,000Technical governancecoefficient_givingRFP on Hardware-Enabled Mechanisms for AI Compliance
Oct 30, 2024Jaan TallinnSurvival and Flourishing Fund$522,000EA infrastructuresffGeneral support
Oct 2024Coefficient Giving$15,961,273Other existential riskcoefficient_givingGeneral Support
Jan 2024Coefficient Giving$595,426EA infrastructurecoefficient_givingEffective Giving Information Sharing
2024Jaan TallinnSurvival and Flourishing Fund$700,000EA infrastructuresffGeneral support
2024Future of Life Institute$100,000AI safetyfli_990Finding solutions to collective action problems — Form 990 (2024)
Dec 2023Coefficient Giving$4,020,258Other existential riskcoefficient_givingGeneral Support
Feb 2023Coefficient Giving$770,076AI governance, policy, and advocacycoefficient_givingAI Policy Development at the OECD
Feb 2023Coefficient Giving$165,000Biosecuritycoefficient_givingFar-UVC Event
Jan 2023Coefficient Giving$47,500EA infrastructurecoefficient_givingSupport for Richard Chappell
Jan 2023Coefficient Giving$57,500EA infrastructurecoefficient_givingFilm Project Scoping Work
Jan 2023Coefficient Giving$74,557EA infrastructurecoefficient_givingResearch Support for Kacper Kowalczyk
Dec 2022Jaan TallinnSurvival and Flourishing Fund$150,000EA infrastructuresffGeneral Support of Effective Ventures Foundation
Nov 2022Coefficient Giving$60,000Biosecuritycoefficient_givingFar-UVC Event
Apr 2022Coefficient Giving$500,000Other existential riskcoefficient_givingNuclear Security Grantmaking
2022FTX Future Fund$2,939,775EA infrastructureftx_future_fundWe recommended a grant to support Longview Philanthropy creating a longtermist coworking office in London. — Empowering Exceptional People, Effective Altruism
2022FTX Future Fund$15,000,000Other existential riskftx_future_fundWe recommended a grant to support Longview’s independent grantmaking on global priorities research, nuclear weapons policy, and other longtermist issues.
Macroscopic VenturesTechnical governancemacroscopicSupport for the hardware-enabled mechanisms request for proposals — Technical AI governance
Macroscopic VenturesAI welfaremacroscopicSupport for the Consortium for Digital Sentience Research and Applied Work — AI welfare & sentience

Grants made

DateRecipientViaAmountCauseSourcePurpose
2026Unknown Recipients~$24,400,000*Other existential riskfund_estimatesAggregate estimate — other existential risk
2026Berkeley Risk and Security LabUniversity of California, BerkeleyOther existential risklongviewFeatured grant (no amount published): six-fellow program pairing AI specialists with nuclear experts, collaborative research, and placement of fellows into US government roles (Defense, State, Energy, Capitol Hill). Added to longview.org May 2026. — Nuclear Weapons Policy Fund
2026Unknown Recipients~$200,000,000AI safetyfund_estimatesAggregate estimate — AI safety
Jan 2026Massachusetts Institute of Technology$600,000Other existential risklongviewUPDATED 2026-09-03: testing whether cosmic-particle signatures of nuclear warheads could verify compliance with the Outer Space Treaty's ban on nuclear weapons in orbit. Featured (no amount published) as a Nuclear Weapons Policy Fund grant on longview.org, added to the site May 2026, but identifiable as 'Arms Control Verification of the Outer Space Treaty: Feasibility Study' -- a $600,000 first-round award announced 29 Jan 2026 by the Consortium to Reduce Nuclear Dangers, whose press release names Longview Philanthropy among the consortium members supporting this specific award (alongside Carnegie Corporation of New York and other funder(s)). The $600,000 is the Consortium's total multi-funder award for the project, not Longview's share alone. See https://www.carnegie.org/news/articles/consortium-to-reduce-nuclear-dangers-announces-first-round-of-grant-awards-and-welcomes-new-partner/ . Previously recorded here with amount null and date 2026 (year precision, from longview.org alone); amount/date updated now that the underlying Consortium award has been identified. — Nuclear Weapons Policy Fund / Nuclear Consortium (co-launched by Longview)
2026Unknown Recipients~$25,000,000*Biosecurityfund_estimatesAggregate estimate — biosecurity
2026Perry World HouseUniversity of PennsylvaniaOther existential risklongviewFeatured grant (no amount published): drafting an 'Autonomous Incidents Agreement' on AI-nuclear risk and operationalizing the Biden-Xi commitment to human control of nuclear launch; Chinese-language research and Track-2 dialogues. Added to longview.org May 2026. — Nuclear Weapons Policy Fund
2025Unknown Recipients~$60,000,000AI safetyfund_estimatesAggregate estimate — AI safety
2025Panoplia LaboratoriesBiosecuritylongviewEmpirical AI-biosecurity research to assess how frontier AI models could enable or constrain real-world misuse and to evaluate current safeguards. Listed as an ECF grantee on Giving What We Can's fund page after the 2025 ECF Annual Report was released (not present on the Feb 2025 archived version); very likely one of the six 2025 ECF grants (which totalled $1.5M across six grants). Amount not publicly disclosed; see the 2025 ECF Annual Report PDF (download-restricted): https://drive.google.com/file/d/1KQWTkWdR6NJ0owpAWeVYwDyKlIPLIuvf/view — Emerging Challenges Fund
2025Unknown Recipients~$7,500,000§Biosecurityfund_estimatesAggregate estimate — biosecurity
2025Unknown Recipients~$2,100,000§Other existential riskfund_estimatesAggregate estimate — other existential risk
2025Consortium to Reduce Nuclear Dangers - first funding round (aggregate, ~25+ recipients undisclosed)$5,400,000Other existential risklongviewCAVEAT - not a single Longview grant: the Consortium to Reduce Nuclear Dangers (a ~$10M pooled fund co-launched by Longview in 2025) awarded $5.4M in its first call for proposals (nearly 500 applications; over $68M requested); a second call opened May 2026. Individual recipients not published on longview.org. Include only if consortium grantmaking is in scope for the database. — Nuclear Consortium (co-launched by Longview)
2024Undisclosed organisation, Europe (990 Schedule F grant 3 of 3)$126,000OtherlongviewFY2024 Form 990 Schedule F Part II, Longview Philanthropy USA Inc: cash grant to an organisation in 'Europe (including Iceland & Greenland)', purpose 'General support'. — Longview Philanthropy USA Inc direct grant (990 Schedule F)
2024Six EU civil society organisations (aggregate; EU AI Act Emergency Support)$733,000Domestic policylongviewAggregate grant line from the ECF 2024 Annual Report ('$733k, EU AI Act: Emergency Support') supporting civil society organisations invited to help draft the EU AI Act Code of Practice; over half of 2024 ECF grantmaking. Individual recipients not named in the public summary. Three of them are probably the US-entity Schedule I grantees Rethink Priorities ($219,000), Players Philanthropy Fund ($51,000), and AI Objectives Institute ($18,843), each with identical '(AI governance in Europe' purpose text in the FY2024 Form 990 -- see separate 990 entries; treat with care to avoid double counting. Source is the TYPE III AUDIO narration mirror of the (now-unavailable) EA Forum announcement post https://forum.effectivealtruism.org/posts/PBonnCzpMjij4X3Mr/announcing-the-emerging-challenges-fund-s-2024-report; canonical report PDF (download-restricted): https://drive.google.com/file/d/1HIds8PdJsjdMSyW2yQtozqEG87jIOzv9/view — Emerging Challenges Fund
2024Players Philanthropy Fund, Inc.$51,000Domestic policylongviewFY2024 (calendar year 2024) Form 990 Schedule I, Longview Philanthropy USA Inc (EIN 93-2664730): 'Supporting public-interest, expert-led research and collaboration to strengthen best practices for AI governance in Europe.' Likely one of the six EU AI Act Code of Practice support grants (fiscally sponsored project not named). — Longview Philanthropy USA Inc direct grant (990 Schedule I)
2024Undisclosed organisation, Europe (990 Schedule F grant 2 of 3)$262,000OtherlongviewFY2024 Form 990 Schedule F Part II, Longview Philanthropy USA Inc: cash grant to an organisation in 'Europe (including Iceland & Greenland)', purpose 'General support'. — Longview Philanthropy USA Inc direct grant (990 Schedule F)
2024Centre for Long-Term Resilience$150,000Security, AI governance, policy, and advocacy, AI × biolongviewAdvising on biosecurity & AI policy. ECF 2024 Annual Report grants table. CLTR (formerly Alpenglow) is also a long-standing Longview featured grantee (see separate entry). — Emerging Challenges Fund
2024Unknown Recipients~$14,828,157AI safetyfund_estimatesAggregate estimate — AI safety
2024Centre for the Governance of AI, Inc.AI governance, policy, and advocacyorg_reportedincluding but not limited to support from...Longview Philanthropy
2024Unknown Recipients~$6,000,000*Biosecurityfund_estimatesAggregate estimate — biosecurity
2024Rethink Priorities$219,000AI governance, policy, and advocacylongviewFY2024 Form 990 Schedule I, Longview Philanthropy USA Inc: 'Supporting public-interest, expert-led research and collaboration to strengthen best practices for AI governance in Europe.' Likely part of the ECF 'Six EU civil society organisations' $733k aggregate. — Longview Philanthropy USA Inc direct grant (990 Schedule I)
2024AI Objectives Institute$18,843AI governance, policy, and advocacylongviewFY2024 Form 990 Schedule I, Longview Philanthropy USA Inc: 'Supporting public-interest, expert-led research and collaboration to strengthen best practices for AI governance in Europe.' Likely part of the ECF 'Six EU civil society organisations' $733k aggregate. — Longview Philanthropy USA Inc direct grant (990 Schedule I)
2024Horizon Institute for Public Service$150,000OtherlongviewPlacing technical expertise in government. ECF 2024 Annual Report grants table. Partially corroborated by FY2024 Form 990 Schedule I grant of $116,285 (general support) from Longview Philanthropy USA Inc; remainder likely disbursed via Giving What We Can/UK entity. — Emerging Challenges Fund
2024Unknown Recipients~$4,907,286*Other existential riskfund_estimatesAggregate estimate — other existential risk
2024Undisclosed organisation, Europe (990 Schedule F grant 1 of 3)$504,714OtherlongviewFY2024 Form 990 Schedule F Part II, Longview Philanthropy USA Inc: cash grant to an organisation in 'Europe (including Iceland & Greenland)', purpose 'General support'. Recipient names are not required to be disclosed on Schedule F. Total FY2024 foreign grants: $892,714. — Longview Philanthropy USA Inc direct grant (990 Schedule F)
2024Pacific Forum$50,000OtherlongviewConvening (summary truncated in source; an asterisk footnote on the amount could not be recovered). ECF 2024 Annual Report grants table. Corroborated by FY2024 Form 990 Schedule I: $50,000 to Pacific Forum International, Honolulu HI, 'to support a US-China dialogue to foster mutual understanding and promote public policy development'. This entry and the Schedule I entry are the same grant. — Emerging Challenges Fund
Dec 2023FAR AI$100,000Technical AI safety researchlongviewResearch directions focused on safely building advanced AI systems (robustness, value alignment, model testing, interpretability). ECF December 2023 grants report. — Emerging Challenges Fund
Dec 2023Blueprint Biosecurity$50,000BiosecuritylongviewCommissioning research into far-UVC light: efficacy for reducing disease transmission, eye safety, and impacts on air quality. ECF December 2023 grants report. Also listed as a featured grant on longview.org ('Blueprint Biosecurity far-UVC work', added Nov 2023). — Emerging Challenges Fund
Dec 2023Decision Research$20,000Other existential risklongviewResearch into nuclear decision-making: sharing and generating research to help officials review nuclear crisis decision protocols. ECF December 2023 grants report. Note: Longview also featured an earlier (pre-2021, amount undisclosed) Decision Research project on psychological processes in nuclear decision-making on its 2021 grantmaking page (https://web.archive.org/web/20210116204242/https://www.longview.org/grantmaking). — Emerging Challenges Fund
Aug 2023Center for Communicable Disease DynamicsHarvard University$80,000BiosecuritylongviewPartially funding the Director of Research and Administration position to support pandemic prevention and biosecurity work. Longtermism Fund August 2023 grants report. — Emerging Challenges Fund (formerly Longtermism Fund)
Aug 2023Nuclear Threat Initiative Biosecurity Programme (NTI | Bio)$100,000BiosecuritylongviewProject to develop research recommendations for disincentivizing state biological weapons programs, including expert workshops. Longtermism Fund August 2023 grants report. — Emerging Challenges Fund (formerly Longtermism Fund)
Aug 2023Harvard University$110,000Interpretability, AI safety fieldbuildinglongviewAI interpretability research: compute cluster setup and hiring graduate students or postdoctoral fellows. Longtermism Fund August 2023 grants report. — Emerging Challenges Fund (formerly Longtermism Fund)
Aug 2023METR$220,000EvalslongviewStaff costs and possibly compute for assessing whether cutting-edge AI systems pose catastrophic risks before release. Longtermism Fund August 2023 grants report. — Emerging Challenges Fund (formerly Longtermism Fund)
Aug 2023Carnegie Endowment for International Peace$52,000Other existential risklongviewResearch workshops and analysis of nuclear war escalation pathways and policy interventions, led by James Acton and Jamie Kwong. Longtermism Fund August 2023 grants report. — Emerging Challenges Fund (formerly Longtermism Fund)
2023Unknown Recipients~$10,570,000*AI safetyfund_estimatesAggregate estimate — AI safety
2023AI policy at the Brookings InstitutionAI governance, policy, and advocacylongviewFeatured grant on longview.org (no amount published; added to site March 2023). Actual grant date may be earlier. — Longview advised/recommended grant (AI)
2023Unknown Recipients~$5,270,000*Biosecurityfund_estimatesAggregate estimate — biosecurity
2023Unknown Recipients~$5,428,000*Other existential riskfund_estimatesAggregate estimate — other existential risk
2023Existential risk policy at the OECDAI governance, policy, and advocacylongviewFeatured grant on longview.org (no amount published; added March 2023). Ongoing partnership supporting OECD existential-risk policy work across the Strategic Foresight Unit, High-Level Risk Forum, AI Policy Observatory, and Secretariat on Bio-, Nano-, and Converging Technologies. A related item 'Longtermism at the OECD' appeared on the 2023 archived site. — Longview advised/recommended grant (policy)
Dec 2022SecureBio$60,000BiosecuritylongviewFunding research scientists, an air sanitisation trial, and establishing a policy unit focused on biosecurity. Longtermism Fund December 2022 grants report. — Emerging Challenges Fund (formerly Longtermism Fund)
Dec 2022Rethink Priorities$30,000Other existential risklongviewSupporting researchers and research staff working on existential risk. Longtermism Fund December 2022 grants report. — Emerging Challenges Fund (formerly Longtermism Fund)
Dec 2022Center for Human-Compatible AIUniversity of California, Berkeley$70,000Technical AI safety researchlongviewSupporting graduate students, affiliated researchers, and infrastructure for AI alignment research. Longtermism Fund (now Emerging Challenges Fund) December 2022 grants report. — Emerging Challenges Fund (formerly Longtermism Fund)
Dec 2022Council on Strategic Risks$15,000Other existential risklongviewPolicy development, advocacy, and fellowships related to nuclear risk reduction. Longtermism Fund December 2022 grants report. — Emerging Challenges Fund (formerly Longtermism Fund)
2022AI Ethics Research at NYUOtherlongviewFeatured grant on longview.org (no amount published; added Oct 2022). — Longview advised/recommended grant (AI)
2022SecureDNABiosecuritylongviewFeatured grant on longview.org (no amount published; added July 2022): secure, automatic screening of DNA synthesis orders for bioweapon sequences (MIT/Tsinghua collaboration). — Longview advised/recommended grant (biosecurity)
2022Unknown Recipients~$6,930,000*AI safetyfund_estimatesAggregate estimate — AI safety
2022Clean Air Task ForceOtherlongviewFeatured grant on longview.org (no amount published; added Oct 2022). Climate/energy policy. — Longview advised/recommended grant (climate)
2022Unknown Recipients~$3,940,000*Biosecurityfund_estimatesAggregate estimate — biosecurity
2022AI ImpactsOtherlongviewFeatured grant on longview.org (no amount published; added Oct 2022). — Longview advised/recommended grant (AI)
2022Preventing Nuclear War ProjectOther existential risklongviewFeatured grant on longview.org (no amount published; added Oct 2022). — Longview advised/recommended grant (nuclear)
2022Telis BioscienceBiosecuritylongviewFeatured grant on longview.org (no amount published; added July 2022). Biosecurity. — Longview advised/recommended grant (biosecurity)
2022Carbon180OtherlongviewFeatured grant on longview.org (no amount published; added July 2022). Carbon removal policy. — Longview advised/recommended grant (climate)
2022Global Priorities InstituteOtherlongviewFeatured grant on longview.org (no amount published; added Oct 2022). — Longview advised/recommended grant (prioritisation research)
2022Unknown Recipients~$3,955,000*Other existential riskfund_estimatesAggregate estimate — other existential risk
2022UT Austin Population Wellbeing InitiativeOtherlongviewFeatured grant on longview.org (no amount published; added Oct 2022). — Longview advised/recommended grant
2021Unknown Recipients~$3,500,000*Other existential riskfund_estimatesAggregate estimate — other existential risk
2021Unknown Recipients~$5,000,000*AI safetyfund_estimatesAggregate estimate — AI safety
2021Unknown Recipients~$3,500,000*Biosecurityfund_estimatesAggregate estimate — biosecurity
2020Unknown Recipients~$3,500,000*Other existential riskfund_estimatesAggregate estimate — other existential risk
2020Unknown Recipients~$3,500,000*Biosecurityfund_estimatesAggregate estimate — biosecurity
2020Unknown Recipients~$3,000,000*AI safetyfund_estimatesAggregate estimate — AI safety
2019Unknown Recipients~$3,500,000*Biosecurityfund_estimatesAggregate estimate — biosecurity
2019Unknown Recipients~$2,000,000*AI safetyfund_estimatesAggregate estimate — AI safety
2019Unknown Recipients~$3,500,000*Other existential riskfund_estimatesAggregate estimate — other existential risk
2018Unknown Recipients~$1,000,000*AI safetyfund_estimatesAggregate estimate — AI safety
2018Unknown Recipients~$1,000,000*Other existential riskfund_estimatesAggregate estimate — other existential risk
2018Unknown Recipients~$1,000,000*Biosecurityfund_estimatesAggregate estimate — biosecurity
Forethought Foundation for Global Priorities ResearchOtherlongviewFeatured grant (no amount published): launching the Forethought Foundation (listed on the 2021 site as a launch grant; re-listed on longview.org Oct 2022). — Longview advised/recommended grant (prioritisation research)
Building the Longtermism CommunityOtherlongviewFeatured grant on the 2023 archived longview.org site (no amount or description recoverable; recipient organisation unclear). — Longview advised/recommended grant
Confessions of a Good Samaritan (documentary)OtherlongviewFeatured grant on the 2023 archived longview.org site (no amount or description recoverable). — Longview advised/recommended grant
Nuclear Information Project (Federation of American Scientists)Other existential risklongviewFeatured grant on the 2023 archived longview.org site (no amount or description recoverable; capture of page content failed, title from URL slug). — Longview advised/recommended grant (nuclear)
Our World in DataOtherlongviewFeatured grant on the 2023 archived longview.org site (no amount or description recoverable; title from URL slug). — Longview advised/recommended grant
Center for Human-Compatible AIUniversity of California, BerkeleyTechnical AI safety researchlongviewFeatured grant on longview.org (no amount published; featured since at least Jan 2021, re-listed March 2023): support for CHAI's AI safety research and PhD training. Distinct from (and possibly additional to) the $70,000 Longtermism Fund grant of Dec 2022 recorded separately. — Longview advised/recommended grant (AI)
Promotion of Toby Ord's The PrecipiceOtherlongviewFeatured grant on the 2023 archived longview.org site (no amount or description recoverable; title from URL slug). — Longview advised/recommended grant
Institute for Law & AILegallongviewFeatured grant (no amount published): longtermist legal research agenda at Harvard Law School (2021 site); listed as 'Legal Priorities Research Network' on the 2023 site. — Longview advised/recommended grant
Johns Hopkins Center for Health SecurityBiosecuritylongviewFeatured grant (no amount published; featured since at least Jan 2021, re-listed July 2022): work to strengthen global health security and defenses against deliberate biological threats, including a research project with the Future of Humanity Institute and pre-pandemic advocacy for a US National Center for Epidemic Forecasting. — Longview advised/recommended grant (biosecurity)
Centre for Long-Term ResilienceBiosecuritylongviewFeatured grant (no amount published): launch/ongoing support for putting long-term thinking (AI, biosecurity) at the heart of UK policymaking. Listed as 'Alpenglow' launch grant on the 2021 site; re-listed Oct 2022. Separate from the $150,000 ECF grant in 2024 recorded separately. — Longview advised/recommended grant (policy)
Effective Ideas Blog PrizeOtherlongviewFeatured grant on the 2023 archived longview.org site (no amount or description recoverable). — Longview advised/recommended grant
CarbonPlanOtherlongviewFeatured grant on the 2023 archived longview.org site (no amount or description recoverable). — Longview advised/recommended grant (climate)
Centre for Effective AltruismOtherlongviewFeatured grant on the 2023 archived longview.org site (no amount or description recoverable). — Longview advised/recommended grant
Council on Strategic RisksOther existential risklongviewFeatured grant on the 2023 archived longview.org site (no amount recoverable). Possibly the same relationship as the $15,000 Longtermism Fund grant of Dec 2022 and/or larger advised support. — Longview advised/recommended grant (nuclear)
OughtTechnical AI safety researchlongviewFeatured grant (no amount published; featured since at least Jan 2021, re-listed July 2022): research on factored cognition and AI alignment. — Longview advised/recommended grant (AI)
Good ImpressionsOtherlongviewFeatured grant on the 2023 archived longview.org site (no amount or description recoverable). — Longview advised/recommended grant
Constance LiOthergrantmaking_aiLongview Philanthropy
University of OxfordBiosecuritylongviewFeatured grant on the 2021 longview.org site (no amount published): study validating a nanopore-sequencing diagnostic tool for early detection of emerging infectious diseases. — Longview advised/recommended grant (biosecurity)
80,000 HoursEA infrastructurelongviewFeatured grant on the 2023 archived longview.org site (no amount or description recoverable; page title only). — Longview advised/recommended grant

* Estimated total given out by Longview Philanthropy in 2026; grants recorded individually in this database are subtracted from the total. Non-AI giving is split evenly between biosecurity and other existential risk.

Estimated total given out by Longview Philanthropy in 2026; grants recorded individually in this database are subtracted from the total.

Estimated total given out by Longview Philanthropy in 2025; grants recorded individually in this database are subtracted from the total.

§ Estimated total given out by Longview Philanthropy in 2025; grants recorded individually in this database are subtracted from the total. Non-AI giving is split evenly between biosecurity and other existential risk.

Estimated total given out by Longview Philanthropy in 2024; grants recorded individually in this database are subtracted from the total.

* Estimated total given out by Longview Philanthropy in 2024; grants recorded individually in this database are subtracted from the total. Non-AI giving is split evenly between biosecurity and other existential risk.

* Estimated total given out by Longview Philanthropy in 2023; grants recorded individually in this database are subtracted from the total.

* Estimated total given out by Longview Philanthropy in 2023; grants recorded individually in this database are subtracted from the total. Non-AI giving is split evenly between biosecurity and other existential risk.

* Estimated total given out by Longview Philanthropy in 2022; grants recorded individually in this database are subtracted from the total.

* Estimated total given out by Longview Philanthropy in 2022; grants recorded individually in this database are subtracted from the total. Non-AI giving is split evenly between biosecurity and other existential risk.

* Estimated total given out by Longview Philanthropy in 2021; grants recorded individually in this database are subtracted from the total. Non-AI giving is split evenly between biosecurity and other existential risk.

* Estimated total given out by Longview Philanthropy in 2021; grants recorded individually in this database are subtracted from the total.

* Estimated total given out by Longview Philanthropy in 2020; grants recorded individually in this database are subtracted from the total. Non-AI giving is split evenly between biosecurity and other existential risk.

* Estimated total given out by Longview Philanthropy in 2020; grants recorded individually in this database are subtracted from the total.

* Estimated total given out by Longview Philanthropy in 2019; grants recorded individually in this database are subtracted from the total. Non-AI giving is split evenly between biosecurity and other existential risk.

* Estimated total given out by Longview Philanthropy in 2019; grants recorded individually in this database are subtracted from the total.

* Estimated total given out by Longview Philanthropy in 2018; grants recorded individually in this database are subtracted from the total.

* Estimated total given out by Longview Philanthropy in 2018; grants recorded individually in this database are subtracted from the total. Non-AI giving is split evenly between biosecurity and other existential risk.