Sportradar is defending itself in federal court after a shareholder filed a class action lawsuit alleging the sports data giant has knowingly served illegal gambling operators worldwide, causing significant stock losses.

Investor James Anthony Smale filed the complaint in the US District Court for the Southern District of New York, naming the company and its executives. He’s seeking damages for shareholders who purchased stock between November 2024 and April 2026. The move follows explosive reports from short sellers Muddy Waters and Callisto Research, which claimed as much as 40% of Sportradar’s revenue derives from unregulated operations.

The Investigation and Share Price Impact

Muddy Waters’ undercover operation proved eye-opening. Posing as a startup sportsbook seeking to enter illegal markets in Vietnam, China, Thailand, and Indonesia, investigators reported that Sportradar sales staff claimed to “serve everyone” and offered introductions to China’s largest illegal gambling operator. The firm compiled a 123-slide report alongside a video presentation detailing the allegations.

Callisto Research independently identified over 270 platforms. These represented more than a third of Sportradar’s claimed 800 operator clients, allegedly operating illegally in regulated or prohibited markets while using the company’s services.

The market reacted sharply. Sportradar’s share price crashed from over $18 to a low of $12.35 following the reports, representing roughly a 25% decline. Since then, the stock has recovered slightly to around $13.12, aided by institutional buying interest from firms like Stephens Investment Management, which acquired 2.2 million shares.

Sportradar’s Defence

The company has flatly denied the allegations. A statement issued after the reports insisted: “Sportradar works exclusively with licensed operators, follows strict global compliance and due diligence standards, and we stand by our independently audited financial statements.”

CEO Carsten Koerl previously assured investors in November that the company operates only with licensed partners and maintains an internal audit process to catch any unauthorised content distribution. He characterised such breaches as rare, occurring “for a handful of cases every year.”

The lawsuit tells a different story. It cites these very statements as proof of misleading disclosure, arguing that executives knowingly understated exposure to unregulated markets.

What’s at Stake

The case will likely hinge on whether Sportradar’s business relationships constitute deliberate facilitation of illegal gambling or merely incidental content distribution to bad actors. Major sports leagues including the MLB, NBA, and NHL hold stakes in Sportradar and have come under pressure from Muddy Waters to investigate the allegations independently.

A jury trial has been demanded, and proceedings could prove costly regardless of outcome. For an industry that relies heavily on regulatory trust and institutional partnerships, the reputational stakes may exceed the financial ones.