Sergey Brin’s philanthropic efforts just got a huge boost as his nonprofit, Catalyst4, made a whopping $261 million from MapLight Therapeutics’ recent IPO. Catalyst4 holds a 60.7% stake in the biotech company, but this share is expected to decrease to 36.8% after the listing.
Source: https://www.bloomberg.com/news/articles/2025-10-27/sergey-brin-nonprofit-gets-a-242-million-lift-from-maplight-ipo