Retail traders pushed GameStop Corp. (NYSE: GME) shares nearly 1% higher overnight Sunday heading into Monday, fueled by an unverified theory that Keith Gill had resurfaced online.

Gill, widely known as “Roaring Kitty” on YouTube and “DeepFuckingValue” on Reddit, was allegedly linked to an obscure account called “Mr. Wizard” that became active and changed its mood status to “+++++”

A crypto commentator claimed on X that Gill had logged into the old account and entered the five plus signs, calling it the moment the GME community had been waiting for.

Neither of Gill’s established public accounts has confirmed a return, and his control of the “Mr. Wizard” profile has not been independently verified.

The alias does carry a documented connection to Gill, as the Wall Street Journal previously reported he was a decorated runner known as “Wizard” on DyeStat, a now-defunct running message board, long before his GameStop fame.

Traders tied the five-plus-sign post to GameStop director Larry Cheng’s recent “++++” update, which followed a wave of insider buying that totaled more than $21 million.

CEO Ryan Cohen purchased 1 million GME shares for approximately $20.4 million, while Cheng, James Grube, and Alain Attal acquired another 70,255 shares for $1.3 million.

Some Stocktwits users speculated that the “+++++” could signify a fifth buyer or signal Gill’s intention to acquire shares, though no evidence confirms either interpretation.

Gill’s last confirmed Reddit position update came on June 13, 2024, when he disclosed holding 9 million GME shares, and his last confirmed post on his verified X account came on January 23, 2025.

Solana-token promotions briefly appeared on that verified X account in May 2026 before being deleted, prompting suspicion the account had been compromised, though Gill never addressed the incident publicly.

On Stocktwits, retail sentiment for GME slipped to “bullish” from “extremely bullish” levels a week earlier, alongside a 68% decline in message volumes over the same period.

One Stocktwits user suggested Gill “may be signaling a recent buy or his intention to buy,” while another said traders were buying GME “in anticipation of +++++”

The fresh speculation followed a strong week for GME, which logged a 7% weekly gain driven by earnings results and insider purchases, marking its third consecutive weekly gain.

GameStop reported second-quarter operating income of a record $160.2 million, with adjusted EBITDA more than doubling to $174 million, and collectibles sales surging 57% to $356.3 million.

Total revenue declined to $790.2 million from $972.2 million, though the company raised its full-year adjusted EBITDA outlook to more than $650 million and reported $5.4 billion in cash, securities, and digital assets alongside an eBay stake valued at $4.9 billion.

“The Big Short” investor Michael Burry had been a vocal supporter of CEO Ryan Cohen’s strategy, calling him Warren Buffett’s “spiritual successor” and saying that GameStop could become an “Instant Berkshire.”

“What he has done at GameStop in terms of governance, divestiture, and clever accretive dilution through capital raises strikes me as a decent throwback model of [Warren] Buffett,” Burry said earlier in the year.

Burry’s support broke after Cohen proposed buying eBay for $56 billion, with Burry rejecting the leverage required and selling his entire GME stake, stating: “The Instant Berkshire thesis was never compatible with more than 5x Debt/EBITDA.”

Burry added “Never confuse debt for creativity,” though he clarified he was not “doubting Ryan” as an operator and maintained support for GameStop’s collectibles and resale strategy.

GME stock has gained 13% year-to-date, with the stock on track for its best monthly performance since April.