As one of the major players in Dumb Money, Gabe Plotkin is central to the movie's story of financial rebellion – yet despite his apparent defeat in the market, what happened to him afterward is more complicated than simple failure. As shown in Dumb Money, Plotkin is the founder of the investment firm Melvin Capital Management. Although Dumb Money's ending explains that Plotkin was forced to shut down Melvin after the catastrophic losses the company incurred as a result of the GameStop saga, he has continued his career with several interesting moves.
https://screenrant.com/dumb-money-gabe-plotkin-what-happened/