---
category: Philanthropists & Benefactors
created: 2026-06-19
location: San Francisco, California
relations:
- fn: 7
  role: board of directors
  start: 2011-04
  type: member_of
  with: '[[GiveWell]]'
- end: 2019-04
  fn: 18
  role: 1.9 million dollars
  start: 2017-03
  type: funded
  with: '[[Real Justice PAC]]'
- fn: 10
  role: chair
  type: head_of
  with: '[[Open Philanthropy]]'
summary: Former Wall Street Journal reporter, wife of Dustin Moskovitz, president
  of Good Ventures and chair of Coefficient Giving, formerly Open Philanthropy, and
  a director or major donor in its web of linked entities.
tags:
- Person
- CariTuna
- OpenPhilanthropy
- EffectiveAltruism
- Philanthropy
- DemocraticDonor
updated: 2026-09-23
---

Cari Tuna graduated from Yale and reported for *[The Wall Street Journal](/organizations/the-wall-street-journal/)*, writing, in the words of the *[Stanford Social Innovation Review](/organizations/stanford-social-innovation-review/)*, "about the California economy, gay marriage, and Turkish food in [San Francisco](/places/san-francisco/)." In December 2010, aged 25, she and [Dustin Moskovitz](/people/dustin-moskovitz/), then 26, became the youngest billionaires to sign the Giving Pledge; their pledge letter, written in Moskovitz's voice, thanked "a partner in Cari who shares my priorities" and promised to "donate and invest with both urgency and mindfulness." With Moskovitz occupied with [Asana](/organizations/asana/), it fell to Tuna to manage their giving, and she quit reporting to study philanthropy.[^1][^2]

### Early Life

Tuna was raised in Evansville, Indiana, the eldest of three children of two doctors. At Signature School she was co-valedictorian and student council president and founded the school's Amnesty International chapter; she was a parishioner at Aldersgate United Methodist Church. At Yale she studied political science and worked on the college paper, wrote for the *Evansville Courier & Press*, interned at the *Minneapolis Star Tribune*, spoke some Arabic and Turkish, and considered becoming a foreign correspondent.[^3][^4] At *The Wall Street Journal* she was a junior reporter in the San Francisco bureau covering enterprise technology and the California economy.[^3][^5] In 2009 a *Journal* colleague who knew Moskovitz from college set the two up on a blind date. They married in 2013.[^3] *Forbes* identified the colleague in 2025 as Jessica Lessin, later chief executive of *The Information*, and reported that Tuna was born in Minnesota before growing up in Evansville.[^6]

### GiveWell and Good Ventures

Tuna read about [GiveWell](/organizations/givewell/) in [Peter Singer](/people/peter-singer/)'s *The Life You Can Save* and met its co-founder [Holden Karnofsky](/people/holden-karnofsky/) through a mutual friend; she joined its board in April 2011. In December 2011, as president of [Good Ventures](/organizations/good-ventures/), "a foundation in the San Francisco Bay Area which she created with her partner Dustin Moskovitz earlier this year," she announced grants of 500,000 dollars to the Against Malaria Foundation and 250,000 dollars to the Schistosomiasis Control Initiative, and planned grants to GiveDirectly, Innovations for Poverty Action, KIPP Houston, Nyaya Health, Pratham and the Small Enterprise Foundation.[^7] In 2012 GiveWell moved its office from New York to San Francisco "to be closer to Tuna and other technology-industry donors," and the joint project GiveWell Labs became the Open Philanthropy Project, led by Tuna, Karnofsky and [Alexander Berger](/people/alexander-berger/). Asked in 2018 whether she identified as an effective altruist, she answered, "Yes. Do you?"[^1]

Tuna has been president of the Good Ventures Foundation on every return since 2015, and its board chair by 2025, with Moskovitz as secretary and treasurer and [Divesh Makan](/people/divesh-makan/) of [ICONIQ Capital](/organizations/iconiq-capital/) as director; none is paid. The foundation's assets reached 10.1 billion dollars in 2025.[^8] Open Philanthropy, which draws nearly all of its grant money from Good Ventures, had given away about 7 billion dollars by September 2026.[^9] In 2026 Coefficient Giving, as [Open Philanthropy](/organizations/open-philanthropy/) was renamed in November 2025, listed her as chair, with Berger as chief executive, Emily Oehlsen as president, [Naina Bajekal](/people/naina-bajekal/) as managing director for communications and [Luke Muehlhauser](/people/luke-muehlhauser/) as managing director for AI governance and international policy.[^10] Announcing the renamed organization's free advisory service in November 2025, Tuna told the Associated Press: "It's always been a vision of mine to create a resource that could support not just Dustin and me, but many donors looking for advice on how to do as much good as they can with their giving." The AP reported that Coefficient Giving is incorporated as a limited liability company with several affiliated tax-exempt nonprofits, that outside donors had given more than 300 million dollars on its advice, and that it had given more than 580 million dollars to build the field of AI-risk research.[^11] In 2025 it launched a 120-million-dollar fund, half from Good Ventures, for research and advocacy against regulatory barriers to housing and energy infrastructure, and the couple joined the Gates Foundation and Lucy Southworth in the 100-million-dollar Lead Exposure Action Fund.[^5][^12]

### Seven Entities

In 2018 the *Stanford Social Innovation Review* writer [Marc Gunther](/people/marc-gunther/) wrote that Tuna played "a key role in no fewer than seven entities, as a director or major donor": the Open Philanthropy Project LLC; the [Open Philanthropy Action Fund](/organizations/open-philanthropy-action-fund/), a 501(c)(4); the Open Philanthropy Project fund, a donor-advised fund at the Silicon Valley Community Foundation; the Good Ventures Foundation; Good Ventures, a supporting organization at the same community foundation; Good Ventures LLC, "a for-profit impact investment firm"; and GiveWell. He wrote that grants through the donor-advised funds "can't be traced back to the original donors." Tuna and Moskovitz were also investors in Breakthrough Energy Ventures.[^1] The Open Philanthropy Action Fund has paid outside lobbyists every year from 2021 through 2026.[^13] Asana's 2026 proxy statement noted that Moskovitz and "his spouse" were directors of Good Ventures, which held Asana shares.[^14]

### Causes

Gunther reported that the cause-selection process Tuna led with Karnofsky and Berger settled on criminal justice reform, farm animal welfare, macroeconomic stabilization, immigration policy and land-use reform, and on two catastrophic-risk areas, biosecurity and advanced artificial intelligence, and that Tuna had concluded that "a lot of philanthropy's biggest claimed successes have come from improving policy."[^1] The criminal justice program, led by the former American Civil Liberties Union advocate Chloe Cockburn, became an independent organization, Just Impact, in November 2021, with a 50-million-dollar grant over three and a half years.[^15] Its AI grantmaking included 30 million dollars to [OpenAI](/organizations/openai/) in 2017, with a board seat for Karnofsky, who later married [Daniela Amodei](/people/daniela-amodei/), president of [Anthropic](/organizations/anthropic/).[^1][^16]

### Politics

On September 8, 2016, Tuna and Moskovitz jointly announced 20 million dollars in contributions to elect [Hillary Clinton](/people/hillary-clinton/), writing that Trump's promises were "quite possibly a deliberate con" and that "we have reservations about anyone using large amounts of money to influence elections."[^17] [Federal Election Commission](/organizations/federal-election-commission/) records itemize about 7.04 million dollars in contributions from Tuna in the 2015-2016 cycle, including 2.5 million each to the LCV Victory Fund and For Our Future PAC, 1.25 million to MoveOn and 416,119 dollars to the Hillary Victory Fund. Between March 2017 and April 2019 she gave 1.9 million dollars to [Real Justice PAC](/organizations/real-justice-pac/), in payments of 653,480 dollars, 350,000, 850,000 and 50,000, and 200,000 dollars to Color of Change PAC. No contributions from her were itemized after April 2019.[^18] Six months later, on October 29, 2019, the Open Philanthropy Action Fund, of which Tuna has been president and director on every return since 2017, gave 750,000 dollars to Real Justice PAC's non-contribution account.[^19][^20]

### Giving Totals

In November 2025 *Forbes* reported that the couple had donated more than 4 billion dollars, including more than 600 million in fiscal 2025, and held another 11 billion dollars in Moskovitz's personal fortune and about 10 billion in the Good Ventures Foundation, "plus more in donor-advised funds." A decade earlier they had helped give 1 million dollars to the [Future of Life Institute](/organizations/future-of-life-institute/); in 2017 they put 30 million dollars through their foundation into OpenAI's nonprofit, and Moskovitz invested in Anthropic's 124-million-dollar round of 2021, "before it was obvious that these labs would make money," in Tuna's words. Their Anthropic stake, which *Forbes* estimated at 500 million dollars, was moved into a nonprofit vehicle in early 2025 so that any "significant financial return" would go back into philanthropy and to "dispel any perception of conflict of interest," she said.[^6]

The same article reported that fellow billionaires, among them the Stripe co-founder Patrick Collison and Lucy Southworth, the wife of Larry Page, had made more than 200 million dollars of commitments to Open Philanthropy's initiatives that year, seeding the Lead Exposure Action Fund, which had distributed 20 million dollars, 17 million of it to Pure Earth, and the Abundance and Growth Fund. It named the [Center for Security and Emerging Technology](/organizations/center-for-security-and-emerging-technology/), the [RAND Corporation](/organizations/rand-corporation/) and FAR.AI as Open Philanthropy's largest AI-safety recipients, and reported that FAR.AI, headed by Adam Gleave, had used 59 million dollars of Open Philanthropy funding. Organizations funded by Open Philanthropy had paid lobbyists at least 3 million dollars that year, and Open Philanthropy itself about 110,000 dollars a quarter. The largest global health recipients were the Malaria Consortium (307 million dollars), Evidence Action (206 million) and Helen Keller Intl (103 million). Berger, the chief executive, and Tuna held weekly walking meetings on strategy and on how quickly funds could be distributed; he said, "We want to build a resource that's ready for the next set of donors."[^6]

[^1]: Gunther, Marc. "Giving in the Light of Reason." *Stanford Social Innovation Review,* Summer 2018. https://ssir.org/articles/entry/giving_in_the_light_of_reason
[^2]: The Giving Pledge, "Dustin Moskovitz and Cari Tuna," pledge letter; Giving Pledge announcement of December 8, 2010. https://www.givingpledge.org/pledger/dustin-moskovitz-and-cari-tuna/
[^3]: Cha, Ariana Eunjung. "Cari Tuna and Dustin Moskovitz: Young Silicon Valley billionaires pioneer new approach to philanthropy." *The Washington Post,* December 26, 2014, copy hosted by Coefficient Giving. https://coefficientgiving.org/wp-content/uploads/washingtonpost.com-Cari-Tuna-and-Dustin-Moskovitz-Young-Silicon-Valley-billionaires-pioneer-new-approach-to-philanthropy.pdf
[^4]: "Billionaire from Evansville to spread the wealth." WFIE 14 News, December 2014. https://www.14news.com/story/27724783/billionaire-from-evansville-to-spread-the-wealth/
[^5]: Coacci, Jessica. "Meet the millennial Meta cofounder and his wife who are giving away $20 billion." *Fortune,* November 10, 2025, via Yahoo Finance, archived December 26, 2025. http://web.archive.org/web/20251226183707/https://finance.yahoo.com/news/meet-millennial-meta-cofounder-wife-170849820.html
[^6]: Liu, Phoebe. "Inside A Billionaire Couple's Plan To Give Away A $20 Billion Facebook Fortune." *Forbes,* November 7, 2025, updated version, archived. http://web.archive.org/web/20260730221730id_/https://www.forbes.com/sites/phoebeliu/2025/11/07/cari-tuna-billionaire-open-philanthropy-facebook/
[^7]: Tuna, Cari. "Guest post from Cari Tuna." The GiveWell Blog, December 23, 2011, archived February 7, 2026. http://web.archive.org/web/20260207082111/https://blog.givewell.org/2011/12/23/guest-post-from-cari-tuna/
[^8]: ProPublica Nonprofit Explorer, "Good Ventures Foundation," EIN 46-1008520, Form 990-PF data through fiscal year ending June 2025. https://projects.propublica.org/nonprofits/organizations/461008520
[^9]: Smith, Ben. "Coefficient Giving's CEO on Silicon Valley's $40 billion philanthropy boom." *Semafor,* September 3, 2026. https://www.semafor.com/article/09/03/2026/coefficient-givings-ceo-on-silicon-valley-40-billion-philanthropy-boom
[^10]: Coefficient Giving, "Team," accessed September 2026. https://coefficientgiving.org/about-us/team/
[^11]: Beaty, Thalia. "Cari Tuna's organization Open Philanthropy to advise other major donors for free." Associated Press, November 18, 2025. https://apnews.com/article/open-philanthropy-cari-tuna-dustin-moskovitz-effective-altruism-0e9e93d9ed9e094f32e4070ecc5b9b2b
[^12]: "TIME100 Philanthropy 2025: Cari Tuna and Dustin Moskovitz." *Time,* May 20, 2025. https://time.com/collections/time100-philanthropy-2025/7286010/cari-tuna-dustin-moskovitz/
[^13]: U.S. Senate, Lobbying Disclosure Act database, filings for client "Open Philanthropy Action Fund," 2021 to 2026, retrieved September 2026. https://lda.senate.gov/api/v1/filings/?client_name=Open+Philanthropy+Action+Fund
[^14]: Asana, Inc. Schedule 14A definitive proxy statement, filed April 20, 2026. https://www.sec.gov/Archives/edgar/data/1477720/000162828026025998/asan-20260420.htm
[^15]: Open Philanthropy, "Criminal Justice Reform (Closed)," archived November 13, 2025. http://web.archive.org/web/20251113222726/https://www.openphilanthropy.org/focus/criminal-justice-reform/
[^16]: Bordelon, Brendan. "How a billionaire-backed network of AI advisers took over Washington." *Politico,* October 13, 2023. http://web.archive.org/web/20250902172514/https://www.politico.com/news/2023/10/13/open-philanthropy-funding-ai-policy-00121362
[^17]: Moskovitz, Dustin, and Cari Tuna. "Compelled to Act." *Medium,* September 8, 2016, archived December 31, 2016. http://web.archive.org/web/20161231130245/https://medium.com/@moskov/compelled-to-act-1413930041ee
[^18]: Federal Election Commission, itemized receipts (Schedule A, memo entries excluded) for contributor "Tuna, Cari," two-year periods 2016 through 2026, retrieved September 23, 2026. https://api.open.fec.gov/v1/schedules/schedule_a/?contributor_name=Tuna%2C+Cari
[^19]: Federal Election Commission, Schedule A receipt from "Open Philanthropy Action Fund," 750,000 dollars, October 29, 2019, reported by Real Justice PAC (C00632554) on its 2019 year-end Form 3X, image 202007029244274196, retrieved September 23, 2026. http://docquery.fec.gov/cgi-bin/fecimg/?202007029244274196
[^20]: ProPublica Nonprofit Explorer, "Coefficient Giving Action Fund" (formerly Open Philanthropy Action Fund), EIN 81-2644663, organization record, Form 990 data and Part VII officer listings for fiscal years 2016 to 2024, retrieved September 23, 2026. https://projects.propublica.org/nonprofits/organizations/812644663