Chan Zuckerberg Initiative
About Chan Zuckerberg Initiative
Priscilla Chan and Mark Zuckerberg established the Chan Zuckerberg Initiative in 2015. The organization operates through several entities, including Chan Zuckerberg Initiative, LLC, a private foundation, a donor-advised fund at Silicon Valley Community Foundation, and a 501(c)(4) advocacy arm. Since 2015 it has reported about $7.22 billion in grants and nearly $300 million invested in ventures. One profile puts headcount at about 560 after a reduction of roughly 8% in early 2026, made to refocus on AI biology. Public sources reviewed did not name the partners who lead its venture or AI investing.
Venture investments sit alongside the organization's grantmaking and internal technology work. Its ventures program says it prioritizes innovations that build impact into the business model or distribution, scalable businesses that can grow quickly, and social entrepreneurs with creative approaches. Its ventures page highlights Somite AI, which describes itself as applying AI to human repair. In May 2025, Somite closed a Series A of more than $47 million led by Khosla Ventures, with CZI among the named participants. CZI's individual amount was not disclosed. Separately, CZI and its Biohub network have committed $500 million over five years to a Virtual Biology Initiative, with $100 million for external research. This is a partnership program rather than an open grant pool, and it is not a venture investment.
- Somite AI: an AI platform for human-cell production (DeltaStem) that is advancing cell therapy programs; Series A of more than $47 million led by Khosla Ventures in May 2025, with CZI as a participant
- Andela: listed under Artificial Intelligence on Silicon Valley Invest Club; last round a growth round in April 2023
- chanzuckerberg.com/grants-ventures/ventures
- insidephilanthropy.com/find-a-grant/grants-z/the-chan-zuckerberg-initi
- altss.com/blog/chan-zuckerberg-capital-routes-grants-ventures-endowmen
- yespress.io/chan-zuckerberg-initiative
- siliconvalleyinvestclub.com/investors/the-chan-zuckerberg-initiative
- theaiworld.org/news/zuckerbergs-500m-ai-cell-initiative-explained
Investing activity
Chan Zuckerberg Initiative is listed on AI Lounge as a venture capital investor based in Redwood City, California, United States. The deals desk records Series A and later AI rounds and seeds over $10M, so smaller checks may not show here yet.
Deals
Frequently asked questions about Chan Zuckerberg Initiative
Who founded the Chan Zuckerberg Initiative?
Priscilla Chan and Mark Zuckerberg established the Chan Zuckerberg Initiative in 2015. It is structured as an LLC alongside a foundation and other entities.
Does the Chan Zuckerberg Initiative invest in AI startups?
Yes. Its ventures page lists Somite AI, which uses AI for cell therapy, and CZI participated in Somite's 2025 Series A. The organization also funds AI biology research through grants and its Biohub network.
What is the Chan Zuckerberg Initiative's venture portfolio?
Public sources report nearly $300 million invested in ventures since 2015. Companies named on its ventures page include Somite AI, Citizen Health, and Sawyer, which is now part of DaySmart.
What kinds of companies does CZI Ventures back?
The ventures program prioritizes businesses where impact is part of the business model or distribution, scalable companies that can grow quickly, and social entrepreneurs with creative solutions.
Does CZI publish its check sizes for AI investments?
No public check sizes were found in the sources reviewed. CZI's individual contribution to Somite AI's Series A was not disclosed.
Where is Chan Zuckerberg Initiative based?
Chan Zuckerberg Initiative is based in Redwood City, California, United States.
How can founders reach Chan Zuckerberg Initiative?
Founders on AI Lounge can see Chan Zuckerberg Initiative's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with the firm under Warm Paths, and add Chan Zuckerberg Initiative to their Investor Pipeline to track the conversation.