GameStop’s Power Player: How Outsider Ryan Cohen Wrested Control

It took just a few months for a 36-year-old entrepreneur to take over America’s most talked-about company—and make $1 billion for himself in the process. Ryan Cohen rose to become chairman of GameStop Corp. with the verve of an old-school corporate raider....Mr. Cohen’s fame among memestock traders, many of whom were also videogame enthusiasts, seemed to grow in tandem with GameStop’s stock. Mentions of him on Reddit and Twitter more than tripled the week of Jan. 24 from the week prior, according to...Zignal Labs Inc. His sometimes enigmatic tweets, such as one showing a photo of a Sears building being demolished, inspired some of his more than 205,000 followers to hunt for cryptic meanings.