Shares fell by more than 30% in Sportradar last week after a report alleges the company retains links to hundreds of illegal gambling sites on its official website.
The company, a Switzerland-based sports analytics firm, was accused by short sellers Muddy Waters and Callisto Research of harbouring relationships with more than 250 unlicensed betting companies. The accusations were strongly rebuked by Sportradar, which claims they only work with fully licensed operators.
More than $800 million wiped from value overnight
Shares of Sportradar Group AG (NASDAQ: SRAD) fell 22.57% to close at $13.04 on receipt of the reports, wiping out more than $800 million in market value in a single session.
Short seller Muddy Waters said it conducted an undercover probe of the company, including at a gaming conference in Barcelona. Investigators posing as sportsbook operators claimed a company executive outlined products for illegal markets and did not object. An Asia-based employee allegedly offered links to a known illegal operator.
The firm said interviews with 15 current and former employees and website analysis identified nearly 50 clients tied to illegal markets. It concluded Sportradar “actively aided and abetted illegal gambling” as a business strategy. Muddy Waters estimated such activity accounts for 20% to 40% of revenue.
Callisto Research reached similar findings using a separate approach. It said more than 270 platforms using Sportradar services were operating illegally, many without licenses. A former employee estimated exposure to unlicensed operators could make up 30% to 40% of revenue, according to the report.
The allegations highlight tension in Sportradar’s model, which provides data to betting operators while offering integrity services to detect suspicious activity. Critics say supplying data to illegal operators would conflict with that role. Callisto said it has shared findings with U.S. and European regulators, with reviews underway.
CEO hits back at “personal attack”
Predictably, Sportradar has come out swinging in response, with CEO Carsten Koerl writing in a post that it was “alarming to see so many false, misleading and defamatory statements” about himself and the business.
He added: “There are numerous allegations in these reports that are either entirely false, poorly researched, deliberately taken out of context, or, at best, repackaging the same tired stories we have heard for years. We have one of the most rigorous compliance processes in a complex, highly regulated industry.”
A spokesperson reinforced that stance, telling the Guardian newspaper: “A short report issued today contains factual inaccuracies about the company, and we unequivocally challenge these assertions. The report demonstrates a fundamental misunderstanding of our business and the industry and was authored by a short seller trying to erode shareholder value and profit from stock disruption.
“Sportradar works exclusively with licensed operators, follows strict global compliance, and due diligence standards, and we stand by our independently audited financial statements, risk disclosures, and information provided to investors and regulators. We conduct our business with the highest ethical standards consistent with company policies, laws and regulations.”
Last month, Sportradar announced the launch of a new iGaming brand, Playradar, as it expands beyond sports data into casino-style offerings. The platform will combine live sports streaming with betting and interactive features, allowing users to engage with events in real time while placing wagers.
At the time of the launch, Koerl said the move is a “natural and scalable extension” of the company’s business, aimed at boosting user engagement and cross-selling between sports and casino products. It remains to be seen whether the brand will be affected by these accusations.
How Sportradar case affects wider industry
The scrutiny of the company from the financial world will have wide-ranging reverberations across the legal sports betting industry, where its data feeds and integrity tools are entangled. Licensed sportsbooks rely on its real-time odds and official league data, meaning any regulatory action could affect core infrastructure used across multiple markets. Analysts say that dependence could amplify the impact beyond a single company.
If U.S. or European regulators pursue formal action, operators using Sportradar’s services may face heightened compliance checks or disruptions. Industry observers note that enforcement could extend indirectly to partners, forcing sportsbooks to reassess vendor relationships and data sourcing. That possibility reflects broader regulatory concerns about accountability in complex betting ecosystems.
The case also highlights the challenge of enforcing data licensing across hundreds of global clients, particularly in lightly regulated or illegal markets. Even with contractual restrictions, monitoring how data is used in practice is difficult. Reports suggest affiliated companies may face a “binary choice” between cutting off questionable clients or risking regulatory scrutiny, each with financial consequences.
For consumers, the immediate impact is limited, as regulated sportsbooks are expected to continue operating normally. However, the controversy raises wider questions about how sports data flows through the industry and who ultimately profits from it. Regulators, lawmakers and market participants are now paying closer attention to those dynamics as the situation evolves.
