Investment guru Warren Buffett topped The Chronicle of Philanthropy's annual list of the biggest charitable donations in 2023, with his $541.5 million gift to the Susan Thompson Buffett Foundation, named for his first wife, who died in 2004. The 2023 list of gifts from individuals or their foundations totaled more than $3.5 billion. Four universities received big gifts, along with four scientific research institutes and a health-care system. The other gifts went to a family foundation and a racial justice group. The list has 11 gifts because of ties. Eight of the donors are multibillionaires, and their combined net worth is $305.1 billion.