https://www.vice.com/en_us/article/bvx3pw/gamestop-short-seller-citron-to-stop-advising-traders-to-short-companies

In a video released Friday morning, Citron Research—the short seller that helped spark the GameStop short squeeze—announced it would no longer publish investment reports on shorts, and instead focus on long positions.

Citron Research publishes investment reports that traders look at and take into consideration when they trade. Notably, Citron was most famous for its reports on “shorts,” which is when a firm is essentially betting on a particular company failing. Citron is a particularly famous short seller and its founder, Andrew Left, was called “The Bounty Hunter of Wall Street” in a 2017 New York Times profile that described him as an “activist” short seller. In other words, not only did he short companies, but he would publicly say so and then publish reports to convince other people that a company was bad, too. So, it’s pretty notable that now Left is pivoting away from short reports.