May 24 2025 – Sergey Brin, the co-founder of Google (now part of Alphabet Inc.), made a significant philanthropic move on Wednesday by donating 4.1 million shares of Alphabet stock, valued at nearly 700million,toanunnamedcharity.Thisgesturecomesamidasurgeinthecompany′sstockvalue,whichclimbedover770 billion to the net worth of Brin and fellow co-founder Larry Page on the same day.
Brin, whose estimated net worth stood at 161billionbytheendof2024,hasahistoryofgenerousgiving.Thelatestdonation,whichincludesbothClassAandClassCshares,followsasimilaractofcharityin2023whenhedonatedstockvaluedatapproximately600 million. Notably, this year’s donation also coincides with the I/O developer conference and is directed towards an undisclosed charitable organization.

Through his Catalyst4 nonprofit, Brin has been actively funding research into Parkinson’s disease and other neurological disorders, as well as initiatives aimed at combating climate change. These efforts encompass projects related to carbon capture technology and offshore wind farms. In 2024 alone, Brin donated shares worth over $100 million, underscoring his commitment to philanthropy.
Since stepping down from Alphabet’s management team in 2019 alongside Page, Brin has continued to engage in significant financial transactions involving the company’s stock. According to Bloomberg data, he has sold shares worth more than $11 billion since Google’s initial public offering in 2004.
Brin’s latest donation not only highlights his personal wealth but also his dedication to making a positive impact on society through strategic philanthropy. As Alphabet continues to innovate and expand its reach, Brin’s contributions to charity serve as a reminder of the potential for technology leaders to use their resources for the greater good.