Chan Zuckerberg Initiative
A philanthropic limited liability company founded by Mark Zuckerberg and Priscilla Chan to advance human potential and promote equity through science, education, technology, and community programs.
Last updated October 27, 2026
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Overview
The Chan Zuckerberg Initiative, commonly known as CZI, is a philanthropic organization established by Mark Zuckerberg and Priscilla Chan in 2015. The couple announced the initiative on December 1, 2015, around the birth of their first child, and committed to directing 99 percent of the value of their Facebook shares over their lifetimes toward the initiative's work. Rather than being organized as a conventional private foundation or charitable trust, CZI operates as a limited liability company. This structure allows it to combine grants and charitable programs with investments in companies, advocacy, lobbying, political activity, and other forms of capital deployment that are more restricted under traditional tax-exempt models. CZI's work is organized around three broad areas: science, education, and justice and opportunity. Its science portfolio supports biomedical research, collaborative research infrastructure, scientific software, open science, artificial-intelligence tools, and efforts to improve the diagnosis, treatment, management, and prevention of disease. The Chan Zuckerberg Biohub, established in the San Francisco Bay Area, is a central component of this activity. It brings together scientists, engineers, and institutions including the University of California, San Francisco, Stanford University, and the University of California, Berkeley. CZI has also supported open-source scientific tools, preprint infrastructure, and research communities intended to make biomedical discovery more collaborative and accessible. In education, CZI has funded personalized-learning technology, early-literacy research, teacher-support programs, education startups, and community-based initiatives. Its activities have included support for Summit Learning, the Reach Every Reader project, The Primary School, Coding it Forward, Byju's, and organizations working on teacher retention, student wellness, and culturally responsive education. Some education programs have attracted debate about evidence of effectiveness, data privacy, and the role of technology companies in public schools. CZI and Chan also helped establish The Primary School in East Palo Alto, California, combining education, health care, and family services. In 2025, CZI announced that the school would close after the 2025–2026 school year because of funding constraints, while committing additional support to regional parent engagement, early-childhood education, and health services. The justice and opportunity portfolio has included affordable housing, economic mobility, criminal-justice reform, immigration reform, and support for communities facing structural disadvantage. CZI helped launch Opportunity Insights, a research and policy organization focused on economic mobility, and participated in the Partnership for the Bay's Future, a regional effort involving philanthropic, business, health, and community organizations to preserve and expand affordable housing in the Bay Area. CZI also supported California ballot initiatives concerning commercial property taxation and criminal sentencing, but after the defeat of CZI-backed measures in 2020 it announced that it would no longer directly fund political campaigns. CZI has become one of the most heavily capitalized philanthropic organizations in the world, although its LLC structure means that it is not subject to all of the disclosure and governance rules applicable to private foundations. It has nevertheless published information about many grants and, in 2020, pledged that software developed by the initiative or its grantees would be released under open-source licenses where possible. The organization expanded its public-health activity during the COVID-19 pandemic, supporting coronavirus research, testing, therapeutic-development efforts, and genomic surveillance. Its priorities and public profile have continued to evolve, including a significant 2025 change in its approach to diversity, equity, inclusion, and accessibility programs in response to a changing legal and political environment.
History
The Chan Zuckerberg Initiative was created by Mark Zuckerberg and Priscilla Chan in 2015 as a vehicle for long-term philanthropy. Its formation was announced on December 1, 2015, coinciding with the birth of the couple's first child. The founders stated that they intended to commit 99 percent of the value of their Facebook shares during their lifetimes to advance human potential and promote equality. The initiative was organized as a limited liability company rather than a private foundation or charitable trust. That choice gave CZI greater flexibility to make grants, invest in for-profit businesses, engage in advocacy and lobbying, and support political activity, while also reducing some of the disclosure obligations associated with traditional charitable institutions. CZI initially concentrated on science, education, and justice and opportunity. Its education work included support for personalized learning through Summit Learning, early-literacy research, education startups, teacher development, and community programs. In 2016, Chan and CZI helped establish The Primary School in East Palo Alto, a nonprofit combining free K–12 education with prenatal care, early-childhood services, and primary health care. CZI later supported Byju's, Andela, Coding it Forward, and other efforts related to learning, technology, and workforce development. Its grants also addressed teacher retention, student wellness, mentoring, and the incorporation of Black and Native American cultural perspectives into curricula. The use of personalized-learning platforms in schools generated criticism and debate concerning effectiveness and student privacy. Science became a major pillar in 2016, when CZI announced a planned $3 billion, decade-long investment intended to accelerate the prevention, management, and treatment of disease. Cornelia Bargmann was announced as the first president of science. Approximately $600 million of the announced commitment was associated with the Chan Zuckerberg Biohub in San Francisco's Mission Bay district. The Biohub was designed to connect researchers and engineers from UCSF, Stanford, UC Berkeley, and other institutions. CZI later expanded into scientific software, open science, and artificial-intelligence tools. In 2017 it acquired Meta, a Toronto-based scientific literature search engine, and in the same year became a founding sponsor of the Vector Institute for Artificial Intelligence. The Meta service was later scheduled for closure, illustrating the initiative's willingness to discontinue projects that no longer fit its strategy. The initiative's justice and opportunity programs developed around economic mobility, housing affordability, criminal-justice reform, immigration reform, and community-level equity. In 2018, CZI helped launch Opportunity Insights, a nonpartisan research institute led by Raj Chetty, John Friedman, and Nathaniel Hendren. In 2019, it joined the San Francisco Foundation and other partners in creating the Partnership for the Bay's Future, which combined a large affordable-housing fund with grants for local governments and community groups. CZI also supported California Proposition 15 in 2020 and opposed Proposition 20. Both measures failed. CZI subsequently announced that it would stop directly financing political campaigns. During the COVID-19 pandemic, CZI and the Chan Zuckerberg Biohub funded coronavirus research and helped expand free testing in the Bay Area through partnerships with Stanford and UCSF. CZI also joined the COVID-19 Therapeutics Accelerator and supported genomic sequencing across California counties. Its open-science activity included support for preprint servers such as bioRxiv and medRxiv and for open-source scientific projects, including scientific Python tools and the Matplotlib visualization library. CZI's activities have periodically attracted scrutiny because of its unusual legal structure, the influence of wealthy technology founders in public policy, education-technology privacy concerns, and the relationship between philanthropic funding and political advocacy. In 2025, the organization changed its position on diversity, equity, inclusion, and accessibility programs. After initially saying that it would continue such work, CZI eliminated its DEIA team and later discontinued funding for programs it considered associated with DEI. The change was criticized by affected organizations and some employees. CZI also announced that The Primary School would close at the end of the 2025–2026 school year while directing new funds toward related services in surrounding communities.
- 2025
DEIA structure and funding are withdrawn
[1]CZI announces the elimination of its DEIA team and later ends funding for programs associated with DEI.
- 2021
Meta sunset is announced
[1]CZI announces that its scientific literature search service will be discontinued in 2022.
- 2020
Political funding strategy changes
[1]After defeats of CZI-backed California ballot measures, the initiative says it will no longer directly fund political campaigns.
- 2020
COVID-19 response expands
[1]CZI supports testing, therapeutics research, coronavirus science, and genomic surveillance partnerships.
- 2019
Partnership for the Bay's Future is created
[1]CZI joins regional partners in an affordable-housing and tenant-protection initiative for the Bay Area.
- 2018
Reach Every Reader receives major support
[2]CZI pledges support for a Harvard-MIT early-literacy research initiative focused on diagnosis and scalable interventions.
- 2017
Meta is acquired
[1]CZI acquires an artificial-intelligence scientific literature search service based in Toronto.
- 2016
Science program and Biohub are launched
[1]CZI announces a decade-long science commitment and establishes the Chan Zuckerberg Biohub as a collaborative biomedical research center.
- 2016
The Primary School is co-founded
[1]Chan and CZI help establish a school in East Palo Alto combining education, health care, and family services.
- 2015
CZI is founded
[1]Mark Zuckerberg and Priscilla Chan announce the initiative and a lifetime commitment involving 99 percent of the value of their Facebook shares.
Products and positioning
A technology-oriented philanthropic organization using grants, research infrastructure, open-source tools, investments, and community partnerships to address disease, educational opportunity, economic mobility, housing, and justice.
Biomedical research infrastructure · 2016
Chan Zuckerberg Biohub
A collaborative research center created to connect scientists, engineers, and institutions working on disease biology, diagnostics, and biomedical technology. Its model emphasizes shared infrastructure, interdisciplinary work, and rapid translation of research into tools or methods that can be used by the wider scientific community.
Education technology
Summit Learning
A personalized-learning platform supported by CZI and used by schools to combine digital course materials, individualized pacing, teacher guidance, and progress data. The platform became one of CZI's most visible education projects and also prompted public discussion about educational evidence, student data, and technology governance.
Scientific information technology
Meta
An artificial-intelligence-powered scientific literature discovery and collaboration service acquired by CZI in 2017. It was intended to help researchers identify relevant publications and accelerate the circulation of scientific findings. CZI announced its sunset in 2021.
Open-source scientific software funding
Essential Open Source Software for Science
A CZI funding program supporting foundational open-source software used in scientific research. Its grants have included projects in scientific computing, visualization, and related infrastructure, with the goal of improving the reliability and sustainability of tools that underpin modern research.
Education and health services · 2016
The Primary School
A nonprofit school and family-services model co-founded by Chan and CZI in East Palo Alto. It combined K–12 education with prenatal care, early-childhood education, primary health care, and other services. CZI announced that the school would close after the 2025–2026 school year because of funding constraints.
Controversies
2025
Withdrawal from DEI-related programs
CZI initially stated that it would continue diversity programs but later eliminated its Diversity, Equity, Inclusion, and Accessibility team, cancelled its Diverse Slate Practice, and discontinued funding for programs that could be associated with DEI. Affected charities and some employees criticized the change.
2020
Former employee files racial discrimination complaint against Chan Zuckerberg Initiative
A former employee, Raymond Holgado, alleged that he experienced racial discrimination at the Chan Zuckerberg Initiative and filed a complaint with California's Department of Fair Employment and Housing on November 9. The Chan Zuckerberg Initiative denied the accusation and said the concerns had been internally and independently investigated.
Debate over the LLC philanthropic model
CZI's use of a limited liability company rather than a private foundation has prompted scrutiny over transparency, political activity, investment flexibility, and the concentration of philanthropic influence among wealthy technology founders.
Concerns about education technology
CZI-supported personalized-learning programs, including Summit Learning, have faced questions about effectiveness, implementation, and the privacy implications of collecting and using student data.
Marketing campaigns
- 2020Support for California Proposition 15
California, United States
CZI supported Proposition 15, a failed ballot measure that would have changed the treatment of commercial property taxes under California's Proposition 13 framework.
Outcome. The proposition was defeated.
- 2020Opposition to California Proposition 20
California, United States
CZI opposed Proposition 20, which would have introduced stricter sentencing and parole rules.
Outcome. The proposition was defeated.
- 2020COVID-19 Therapeutics Accelerator
Global
CZI joined a public-private effort led by major philanthropic and health organizations to accelerate the development and evaluation of COVID-19 treatments.
Outcome. CZI provided pledged philanthropic support.
Brand decisions
2025
Change DEIA strategyStrategyBackground
CZI cited a changing legal and regulatory environment surrounding diversity, equity, inclusion, and accessibility programs.
Action taken
The organization removed its DEIA team, cancelled its Diverse Slate Practice, and ended funding for programs considered associated with DEI.
Aftermath
The decision drew criticism from affected charities and some CZI employees.
2020
Stop directly funding political campaignsStrategyBackground
CZI-backed California ballot initiatives failed during the 2020 election cycle.
Action taken
CZI announced a restructuring that ended its direct financing of political campaigns.
Aftermath
The initiative continued policy and community work while separating that work from direct campaign funding.
2017
Acquire MetaM&ABackground
CZI sought technology that could improve researchers' ability to find and share scientific literature.
Action taken
CZI acquired the Toronto-based artificial-intelligence literature search engine Meta.
Aftermath
CZI later announced that Meta would be sunset, with closure planned for 2022.
2016
Commit heavily to biomedical scienceStrategyBackground
CZI identified scientific discovery and disease prevention as a central route to advancing human potential.
Action taken
The initiative announced a planned $3 billion science investment over ten years and created the Chan Zuckerberg Biohub.
Aftermath
CZI became a significant funder of collaborative biomedical research, open science, and scientific software.
Planned science investment. $3 billion (Ten years, announced in 2016)
2015
Adopt an LLC philanthropic structureStrategyBackground
The founders wanted a vehicle capable of combining philanthropy with investments, advocacy, and other forms of activity not easily available to a conventional foundation.
Action taken
CZI was established as a limited liability company and owned by Mark Zuckerberg and Priscilla Chan.
Aftermath
The structure provided operational flexibility but generated continuing debate over disclosure and accountability.
Recent events
Former employee files racial discrimination complaint against Chan Zuckerberg Initiative[4]
Reported:
Former employee Raymond Holgado alleged that he experienced racial discrimination at Chan Zuckerberg Initiative and filed a complaint with California's Department of Fair Employment and Housing on November 9. CZI denied the accusation and said the concerns had been internally and independently investigated.
Chan Zuckerberg Initiative announces participation in COVID-19 therapeutics accelerator[5]
Reported:
The Chan Zuckerberg Initiative announced plans to join the Bill and Melinda Gates Foundation and others in a COVID-19 therapeutics accelerator, including a planned $25 million donation to a research fund exploring possible treatments.
Chan Zuckerberg Initiative commits $450,000 to CLOVES Syndrome Community[6]
Reported:
The Chan Zuckerberg Initiative, through its Rare As One Project, committed $450,000 to help CLOVES Syndrome Community build capacity, expedite research and support progress for people with CLOVES.
CZI launches its Community Space[7]
Reported:
The Chan Zuckerberg Initiative announced the launch of the CZI Community Space in downtown Redwood City, offering free meeting and event space to eligible nonprofit organizations and local government agencies.
Sources7 sources
- 1Chan Zuckerberg Initiativeen.wikipedia.org
- 2Harvard, MIT, and CZI launch early-literacy initiativenews.harvard.edu
- 3Chan Zuckerberg Initiative official websitechanzuckerberg.com
- 4Former employee files racial discrimination complaint against Chan Zuckerberg Initiativeitechpost.com
- 5陈-扎克伯格倡议宣布参与新冠肺炎治疗加速器businesstoday.in
- 6Chan Zuckerberg Initiative承诺向CLOVES Syndrome Community提供45万美元prweb.com
- 7CZI推出社区空间prnewswire.com
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