With a $17 million budget, Glide provides an estimated 750,000 free meals, 815,000 syringes, emergency shelter for 8,700 people, and day care and afterschool programs for 450 children each year.
"I am proud to be part of something that has directly benefited so many people in need," Buffett said in a statement.
Williams said Buffett talks with him a few times a year, about Glide and whatever else is on their minds. "It is a relationship that we have," Williams said. "He's very jovial, open and a lot of fun, but he's also very serious."
According to Glide, the following are the winning bids in past auctions:
2000: Pete Budlong, $25,000
2001: Jim Halperin and Scott Tilson, $20,000
2002: Jim Halperin and Scott Tilson, $25,000
2003: David Einhorn, Greenlight Capital, $250,100
2004: Jason Choo, Singapore, $202,100
2005: Anonymous, $351,100
2006: Yongping Duan, California, $620,100
2007: Mohnish Pabrai, Guy Spier, Harina Kapoor, $650,100
2008: Zhao Danyang, Pure Heart Asset Management, China,
$2,110,100
2009: Courtenay Wolfe, Salida Capital, Canada, $1,680,300
2010: Ted Weschler, $2,626,311
2011: Ted Weschler, $2,626,411
2012: Anonymous, $3,456,789
2013: Anonymous, $1,000,100
2014: Andy Chua, Singapore, $2,166,766
2015: Zhu Ye, Dalian Zeus Entertainment Co, China,
$2,345,678