刚刚，捐了70亿股票

Core Viewpoint - Sergey Brin, co-founder of Google, has donated over $1.1 billion worth of Alphabet stock, primarily to a nonprofit organization he founded, Catalyst4, which focuses on research for central nervous system diseases and climate change solutions [1][3]. Group 1: Donation Details - The donation involves more than 3.5 million shares of Alphabet stock, with approximately $1 billion directed to Catalyst4 [3]. - An additional $90 million will be donated to Brin's family foundation, and $45 million to the Michael J. Fox Foundation, which specializes in Parkinson's disease research [3]. - Earlier in May, Brin donated $700 million worth of Alphabet stock to the same three charitable organizations [3]. Group 2: Financial Impact - Sergey Brin is currently the fourth richest person globally, with a net worth of approximately $255.5 billion, significantly boosted by the rise in Alphabet's stock price [3]. - Alphabet's stock reached a historical high of $323 on a recent Tuesday, driven by advancements in artificial intelligence [3]. - Brin holds about 6% of Alphabet's shares, and his net worth has increased by $97.3 billion this year alone [3].