A GameStop store.
  • GameStop shares soared on Monday.
  • The surge came after the trader Keith Gill, known as Roaring Kitty, showed his $116 million position.
  • The meme stock also surged last month after Gill broke a three-year social-media silence.

GameStop shares surged at Monday's opening bell after the trader Keith Gill, who posts on social media under the aliases "Roaring Kitty" and "DeepFuckingValue," disclosed his $116 million stake in the struggling retailer.

The stock was up 40% shortly before 10 a.m. ET after an account snapshot posted on Reddit's r/SuperStonk forum showed Gill held five million GameStop shares.

Late on Sunday the trader also posted a picture of an Uno reverse card on X, which had 65,000 likes at last check.