Callisto Research & Muddy Waters Research
2 shared events · Importance 3 · Last updated Jul 04, 2026
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Callisto Research is a newer activist short-selling firm that operates as a peer and competitor to the established Muddy Waters Research. While independent, the two firms occasionally align on targets, such as their parallel short campaigns against Sportradar in 2026.
Business
Callisto Research: Callisto Research is an investigative research firm that published a report alleging Sportradar has ties to illegal gambling and sanctioned parties, contributing to the stock price fall and lawsuits.
Muddy Waters Research: Muddy Waters Research is an investigative research firm that published a report accusing Sportradar of actively aiding illegal gambling, which triggered a significant drop in Sportradar's stock price and the subsequent lawsuits.
May 21, 2026 · 218 articles
Regulatory
Callisto Research: Callisto Research published an investigative report alongside Muddy Waters Research, alleging Sportradar's involvement with black-market gambling operators, contributing to the negative market reaction.
Muddy Waters Research: Muddy Waters Research published an investigative report alleging Sportradar's involvement with black-market gambling operators, which triggered the drop in Sportradar's share price and the subsequent class action lawsuit.
Jun 25, 2026 · 7 articles
NEWSDESK
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