Google co-founder Sergey Brin has given $126.6 million worth of Alphabet stock to the Sergey Brin Family Foundation and the Michael J. Fox Foundation for Parkinson’s Research, Forbes reports.

According to a Securities and Exchange Commission filing, Brin has evenly distributed 1.07 million shares of Google’s parent company, Alphabet, between the two foundations. Identified by Forbes as the ninth richest person in the world, Brin—who co-founded Google with Larry Page in 1998—currently holds 739 million shares in the company. Brin is a longtime contributor to the Fox Foundation and has supported Parkinson’s Disease research as a personal pursuit—both Brin’s mother and an aunt were diagnosed with Parkinson’s, and Brin himself carries the Parkinson’s-related mutation of the LRRK2 gene.

As of the end of 2020, the Brin Foundation, with assets estimated at $3 billion, has distributed more than $520 million to nonprofits in the San Francisco Bay Area—where Brin lives—and elsewhere. In addition, Brin has previously donated at least $23 million worth of Alphabet shares to his wife Nicole Shanahan’s Bia Echo Foundation.

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