On Wednesday, predictions marketplace Kalshi fined and suspended two users for violations of the platform’s insider trading rules. The first case involves a U.S. politician who ran for the Governor of California last year, while the second incident concerns an employee of popular YouTuber MrBeast.
In recent months, Kalshi and Polymarket, which enable users to place bets on sports, politics, entertainment, and other key events, have seen several trades that have prompted speculation about possible insider trading. The event marks one of the first disciplinary actions within the fast-growing prediction market industry.
Kalshi Fines, Suspends Kyle Langford for Betting on His Own Election
According to a statement from Kalshi’s head of enforcement, Robert DeNault, the company opened 200 investigations into potential insider trading cases over the past year, which is banned on the platform. It currently has more than a dozen active cases.
In the first case, Kyle Langford, a former candidate for the Governor of California, used the platform to bet about $200 on his candidacy and posted about it on X. The former Republican turned Democrat is currently running for election to the U.S. House of Representatives for California’s 26th Congressional District.
In May 2025, Langford shared a video on X of himself placing a $98.76 bet, wagering that he would win the Governor race. While Kalshi said his account did not withdraw any profits, he is banned from the site for five years, fined $2,000, and required to return $246.36 in profits.
MrBeast Employee Suspended Over Insider Trading on Kalshi
Kalshi also suspended and penalized Artem Kaptur, a video editor employed by MrBeast, who traded about $4,000 on YouTube stream markets between August and September 2025. The activity was flagged by the platform’s surveillance team for “near-perfect” trading success on markets with low odds.
The individual behind the wagers was identified with the help of other traders on the platform. Kalshi concluded that he likely traded on non-public information that he obtained through his job.
MrBeast, whose real name is Jimmy Donaldson, runs the most popular channel on YouTube, with roughly 468 million subscribers. In a statement to CBS News, Beast Industries, the media company behind the channel, said it has “no tolerance” for Kaptur’s behavior and is conducting an internal investigation into the matter.
Kaptur was fined $15,000 and ordered to return $5,397.58 in profits related to his trading on Kalshi. He has also been handed a two-year suspension from the site.
The company has reported both cases to the U.S. Commodity Futures Trading Commission (CFTC), which regulates the prediction market industry.
Feds Move to Rein in Insider Trading on Prediction Platforms
Earlier this month, Kalshi strengthened its surveillance efforts by establishing a surveillance audit committee and partnering with crypto trading surveillance firm Solidus Labs to detect, investigate, and address market abuse.
This effort comes in response to an uptick in suspicious trades on prediction marketplaces. In January, one unidentified Polymarket user won $436,000 on a bet that anticipated the capture of former Venezuelan President Nicolas Maduro by U.S. forces hours before it happened.
However, in the case of Langford and Kaptur, their trades were flagged by Kalshi’s systems, resulting in the security team freezing their accounts. The company said it will donate the fines to a non-profit organization that provides consumer education on derivatives markets.
On Thursday, CFTC Chair Mike Selig said the federal regulator has established a prediction markets advisory committee to collaborate with industry participants in efforts to catch insider trading.
