Unity Software (U) shares jumped 8% Thursday, a day after a social media post by the meme stock hero known as "Roaring Kitty" featuring a clip of the late musician Rick James, who had a song called "Unity."

No recent securities filings by Unity Software show that Keith Gill, a.k.a. "Roaring Kitty," had purchased shares.

'Roaring Kitty' Posts Have Sent Several Stocks Jumping Since Last June

After making his mark during the meme stock craze of late 2020 and early 2021, Gill resurfaced last year, sending shares of several stocks jumping with his posts.

Gill's foray back into the limelight began in June, when he indicated a large position in video game retailer GameStop (GME) in a post on Reddit (RDDT), where he goes by the username "DeepF---ingValue." That was followed with a cryptic photo of a cartoon dog on X that drove up shares of Chewy (CHWY) and Petco Health + Wellness (WOOF).  

Later, a Securities and Exchange Commission (SEC) filing revealed Gill had taken a position in Chewy. Gill later posted another cryptic photo from the movie "Toy Story 2," suggesting that he had dropped the stock. He did sell it later in the year.

Despite Thursday's rise, Unity Software's stock has lost more than a third of its value over the past 12 months.