The biggest losses on GameStop were borne by institutional short-sellers, with Melvin Capital being the most prominent, losing billions and eventually shutting down, while firms like Citron Research also suffered massive losses, though total figures vary, with estimates reaching billions across hedge funds in early 2021. Individual retail traders also faced significant losses when prices dropped after the peak, but the systemic impact was on these large funds betting against the stock.
Seth Rogan will play Gabe Plotkin, whose Melvin Capital lost billions during the GameStop short squeeze. Once one of Wall Street's most successful hedge funds, Melvin Capital never fully bounced back from 2021's losses and shuttered operations in May of 2022. Vincent D'Onofrio plays billionaire investor Steve Cohen.
Even the stories of some of the traders Dumb Money was based on, and who I talked to for this story, are far from cut and dried. Some big names lost money on GameStop, but others made a bundle. The same goes for everyday investors — some won, some lost, and plenty were just in it for the casino-like ride.
As of late 2025, Keith Gill has largely returned to the shadows, but his footprint is heavier than ever. Unlike his complete disappearance in 2021, Gill's recent activity suggests he is now an active, high-net-worth trader rather than just a "hold forever" advocate.
How Much is Roaring Kitty Worth? Gill's belief in GameStop didn't just make him famous—it made him incredibly wealthy. After exercising his call options, Gill still holds 9,001,000 shares of GameStop. At today's price of $29.70 per share, those shares are worth about $267 million.
Almost five years ago, GameStop champion Keith Gill revealed a $53,000 bet in his favorite video game retailer. This week, Gill's net worth is over $289 million.
#7: Gill's Sister Passed Away
Keith and Kevin lost their sister Sara Gill on June 25, 2020, at age 43. The movie mentions that her death was unexpected, but it doesn't delve into how Sara died.
Campbell only sold five of those shares, making more from that sale than she spent on the investment of the 100. She still holds the remaining shares.
2021 losses
In early 2021 the fund lost over 30% due to numerous short bets that went awry, including GameStop. Users of the subreddit r/WallStreetBets made widespread bets believing that GameStop's stock would increase in value.
Investing $10,000 in Apple (AAPL) stock in 1990 would have yielded an astronomical return, making you a multimillionaire many times over by today, with calculations suggesting it would be worth tens of millions of dollars (or potentially over $100 million with dividends reinvested) due to incredible growth, stock splits, and the success of products like the iPhone, though exact figures vary slightly based on calculation dates and dividend reinvestment, Yahoo Finance.
Yes, Daymond John is still very rich, with an estimated net worth of around $350 million, built from his iconic FUBU brand, his role on Shark Tank, and various other ventures like The Shark Group, speaking, and authoring. He's considered a centi-millionaire and continues to be an active investor and entrepreneur.
Mark Cuban is significantly richer than Kevin O'Leary, with Cuban's net worth estimated in the billions (around $5.7 billion to $6 billion+ in recent reports) compared to O'Leary's net worth, which is typically cited as around $400 million, making Cuban the wealthiest "Shark" on Shark Tank. Cuban's wealth stems from ventures like Broadcast.com and the Dallas Mavericks, while O'Leary built his fortune through companies like SoftKey International (The Learning Company).
The biggest Shark Tank miss is widely considered to be Doorbot (now Ring), which the Sharks passed on in 2013 but was later acquired by Amazon for $1 billion in 2018, a massive missed opportunity for the investors. Another significant missed deal, though not a "missed company" but a rejected offer, was the founders of Coffee Meets Bagel turning down Mark Cuban's record $30 million offer for the whole company, though they raised millions in later funding, says Entrepreneur.
Chewy has lost one of its most high-profile feline customers. Keith Gill, better known as the meme-stock messiah Roaring Kitty, has sold off his stake in the online pet retailer, divesting 9 million shares of the company.
Keith Gill, the “Roaring Kitty” meme stock investor who last month revived frenzied trading of GameStop and AMC Entertainment shares, revealed in a Reddit post on Sunday that he had bought nearly $116 million worth of GameStop stock. The screenshot also showed he bought 120,000 call options with a $20 strike price.
What is Keith Gill's net worth in 2025? If Gill's Gamestop position hasn't changed since he last made it public in June 2024, he owns 9 million shares, which as of early 2024, would be worth around $275 million. If Gill still holds both of these stock positions, his net worth could be around $580 million.