11:45 AM EDT, 05/13/2024 (MT Newswires) -- Shares of GameStop ( GME ) soared on Monday after the person behind the 2021 rally in the video game retailer's stock resurfaced on social media site X, formally known as Twitter, after a seemingly three-year hiatus.

The share price was up 63% intraday, previously hitting its highest level since August 2022 in morning trade.

The person, known as "Roaring Kitty" on YouTube, posted on X a sketch of a video gamer leaning forward in a chair, a meme used to indicate that things are getting serious. It is the first post on his X timeline since June 2021.

His legal name is Keith Gill, and is known as "DeepF------Value" on Reddit. His posts on Reddit's Wallstreetbets discussion group in 2021 helped drive interest in GameStop ( GME ).

A key position of Gill at the time was that GameStop ( GME ) was undervalued and that investors could rally behind the stock and squeeze Wall Street short sellers. Shares of AMC (AMC), another meme stock, rallied 31% in Monday trade.

Gill has not posted on YouTube since April 2021. In the aftermath of the meme rally, Gill was hit with class-action lawsuits, according to media reports. He testified before Congress' House Committee on Financial Services in February 2021 about his role in the frenzied GameStop ( GME ) trading. Others including Robinhood Markets ( HOOD ) Chief Executive Vlad Tenev also testified at the time.

In March 2024, GameStop ( GME ) reported a year-over-year decline in fiscal fourth-quarter revenue that reflected softer sales across all three of its operating segments. On a conference call at the time, then-Chief Executive Matthew Furlong said that "although there is a lot of hard work and necessary execution in front of us, GameStop ( GME ) is a much healthier business today than it was at the start of 2021," according to a Capital IQ transcript.

Price: 29.35, Change: +11.89, Percent Change: +68.10