The Glide Foundation, based in San Francisco, aims to further social justice, get people out of poverty, and change people's lives. Super investor Warren Buffett's late wife Susie was so impressed by Glide that she launched an annual auction to raise money for it -- auctioning off a meal with her husband. That was in 2000. Mrs. Buffett passed away in 2004, but her husband continued the tradition for many years. Now, he has said that 2022's auction will be the last. Here's a look at the interesting history of this tradition, at some of the winners, and at Buffett's other charitable activities. Image source: Getty Images. Meals with Warren Buffett The annual auction went on hiatus in 2020 and 2021, due to the pandemic, but it returned this year. The 20th auction for Glide was conducted, as always, on eBay, and it concluded on June 17. The winning bids have risen significantly over the 20-plus years, with the last winner, in 2019, bidding $4.6 million. This year, though, that bid was nearly quadrupled, with the anonymous winner offering more than $19 million. The folks at Glide note that the auctions have raised more than $53 million, supporting "transformative programs and services that lift people out of poverty, hunger, and homelessness, and advance equity through systems change." Buffett, who turns 92 in August, said in an interview with the organization: It's been nothing but good. We've raised money, but I've had a good time. I've met a lot of very interesting people from all over the world. ... The one universal characteristic is that they have a good time, and they feel they've got their money's worth. But the most important thing is they feel that that money is going to be put to very good uses. ... And it translates into human beings finding that there is hope in life. It's interesting that Buffett has done more than just raise money for Glide. Just as he has put a lot of thought into how to build his company, Berkshire Hathaway, to last far into the future, Glide President Karen Hanrahan told Reuters, "[Buffett] has been a thought partner in thinking through Glide's future, and how to set it up for the next 50 years." Winners of past auctions This year's winner remains, so far, anonymous, as have been many other past winners. Many are known, though. The Financial Post listed these winners, crediting Glide: Year Winner Winning Bid 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 2016 Anonymous $3,456,789 2017 Anonymous $2,679,001 2018 Anonymous $3,300,100 2019 Anonymous $4,567,888 Source: The Financial Post. Investors Spier and Pabrai have written and spoken about their 2007 lunch, saying that it was "worth every penny" and sharing some lessons learned, such as: "Approach everything with integrity," "Get comfortable saying 'no,'" and "Do what you love." Investor Weschler's two lunches with Buffett led not only to some lessons learned, but also a new job, as Buffett took a liking to Weschler, thought he'd fit in well with Berkshire, and offered him a role investing some of Berkshire's billions. Today, Weschler -- along with Todd Combs, hired a bit before him -- are Buffett's investing lieutenants, now investing many billions of company dollars. Buffett and charity While this tradition is ending, it's not the end for Buffett's charitable activity. He has long been serious about philanthropy, and in 2010, along with Bill and Melinda Gates, launched The Giving Pledge -- an organization aimed at inspiring billionaires to publicly commit to giving away at least half of their fortunes to charity. It has signed up about 263 of them, so far. Buffett himself has a net worth recently estimated at $95 billion -- but it would be much higher, had he not started giving away big chunks of it annually years ago. (He recently made his latest annual gift, of $4 billion, to several charities, including The Gates Foundation.) Buffett plans to give away 99% of his wealth, and in many recent years, he has been the largest charitable donor for the year. He also holds the record for lifetime giving -- recently at some $48 billion -- and has been called the biggest philanthropist of all time. So while it may be a shame that the annual auctions for Glide will end, Buffett is still making the world a better place by putting his money to good use. As he's said, "If you're in the luckiest 1% of humanity, you owe it to the rest of humanity to think about the other 99%." 10 stocks we like better than WalmartWhen our award-winning analyst team has an investing tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* They just revealed what they believe are the ten best stocks for investors to buy right now... and Walmart wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks Stock Advisor returns as of 2/14/21Selena Maranjian has positions in Berkshire Hathaway (B shares). The Motley Fool has positions in and recommends Berkshire Hathaway (B shares). 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