Several meme stocks including Koss Corp (NASDAQ:KOSS), BlackBerry Ltd (NYSE:BB) and Tupperware Brands Corp (NYSE:TUP) are moving Monday morning in sympathy with GameStop Corp (NYSE:GME), which surged following a social media post from Keith Gill, best known as "Roaring Kitty."

What To Know: GameStop shares are up more than 75% Monday morning, which has sparked a move in several related meme names and stocks with high short interest.

Gill, best known as "Roaring Kitty" on YouTube and X or "DeepF***ingValue" on Reddit, posted a screenshot to Reddit suggesting he currently has a $116 million bet on GameStop. The image appeared to show that the trader is holding 5 million GameStop shares and 120,000 call options.

The news comes after Gill made his return to social media about two weeks ago following three years of silence. He first posted a meme of a person leaning forward in a chair before following it up with a series of short video clips. On Sunday, he posted an image of a green reverse Uno card.

Gill posted a series of videos on YouTube leading up to the historic short squeeze in 2021. When GameStop shares eventually soared, the trader began posting updates of his positions on Reddit's r/WallStreetBets. Gill is often credited with sparking the meme stock mania of 2021.

KOSS, BB, TUP Price Action: At the time of publication, Koss Corp shares were up 16.2% at $5.46, BlackBerry shares were up 5.73% at $2.95 and Tupperware shares were up 10.3% at $1.92, per Benzinga Pro.

Photo: Sergei Tokmakov from Pixabay.