ABC News first reported on the investigation. It’s the latest example of a high-profile disclosure of alleged insider trading on prediction markets, which have rapidly gained popularity in recent years.

“Our surveillance team promptly flagged and referred these trades to the CFTC after an exchange investigation,” Robert DeNault, Kalshi’s head of enforcement, said in a statement. “We have been assisting regulators on this matter and provided evidence we collected, as we do in any referral.”

In April, Kalshi suspended three congressional candidates for betting on their own races.

Virginia candidate Mark Moran, who launched an insurgent bid to primary Democratic Sen. Mark Warner before launching an independent bid, said at the time that he had gambled on his race in an effort to call attention to Kalshi’s effects on young men.

“I traded $100 on myself, knowing this would happen (also knowing that I wouldn’t be vying for the democratic nomination) and the attention it would create to highlight how this company is destroying young men and as Senator I will go after Kalshi and impose significant penalties on them - 25% - a vice tax - to pay down our national debt,” he wrote on X.

Perez did not respond to a request for comment sent through the White House, and he could not immediately be reached directly.

Declan Harty and Cheyanne M. Daniels contributed to this report.