(Bloomberg) -- A horde of traders on Reddit that see themselves as sticking it to the establishment by hunting for heavily shorted stocks is adding billions to the wealth of some of the world’s ultra-rich.Larry Chen, chairman and chief executive officer of GSX Techedu, saw his fortune increase $4.5 billion Wednesday as U.S. depository shares of the Beijing-based online tutoring company rose 38%, pushing his net worth to almost $16 billion.Fellow Chinese billionaire Wang Jianlin’s wealth surged more than $450 million through his stake in AMC Entertainment Holdings Inc. as retail traders surged into the stock, causing it to spike as much as 310% even as the broader market slumped. It also boosted hedge funds such as Mudrick Capital, which owned 4.6 million shares in the cinema operator as of Jan. 4.Chewy Inc. co-founder Ryan Cohen added about $1.6 billion with his holding in GameStop Corp., the video-game retailer that has surged more than 1,500% this year through Wednesday. Fellow investor Donald Foss, founder of subprime auto lender Credit Acceptance Corp., now owns a stake worth more than $1 billion, according to the Bloomberg Billionaires Index.Even the head of Tootsie Roll Industries Inc. benefited, with CEO Ellen Gordon’s fortune rising $200 million as the candy maker’s shares rose to a record.Meteoric RallyDay traders have been piling into previously unloved tickers favored by short sellers in recent sessions, driving them to record highs. The meteoric rally of GameStop has already worn down some institutional investors, with Melvin Capital closing out its short position by Wednesday.The hunt for heavily shorted stocks is being led by the Reddit forum WallStreetBets, which boasts roughly 2.8 million members. Some of the more outspoken have taken an activist stance, portraying their campaign as taking a stand against such societal problems as financial inequality and generational injustice.Gordon owns just over half of Tootsie Roll Industries’ common shares and 81% of its B shares, according to company filings. Her stake in the maker of Tootsie Pops, Junior Mints and Dubble Bubble gum, which she owns both directly and on behalf of other family members, is now worth more than $1.8 billion.Cohen disclosed an investment in GameStop in August. By December, he’d purchased 9 million shares in the retailer for a total cost of $76 million and now holds a stake worth almost $3 billion. GameStop shares were up 121% to $326.38 at 10:50 a.m. in New York after rising as much as 140% at the open, leading to at least two volatility halts.Jianlin, the founder of closely held conglomerate Dalian Wanda Group, now owns a stake worth about $700 million in AMC, which climbed as high as $20.36 in New York trading, the most since September 2018. Jianlin has a net worth of $13.6 billion, according to the Bloomberg Billionaires Index.(Updates with Larry Chen in second paragraph.)For more articles like this, please visit us at bloomberg.comSubscribe now to stay ahead with the most trusted business news source.©2021 Bloomberg L.P.