The prediction market operator Kalshi has rolled out new job detail requirements for certain users. This, the firm claims, will help stamp out insider trading and block some individuals from making sensitive trades.
The screening process will apply primarily to markets that Kalshi judges have a heightened risk of insider manipulation, the firm said in an official release.
“For markets with certain scores, we will collect employment [information] and put in measures to screen potential insiders,” Kalshi said.
Prediction market operators have come under fire in recent months amid allegations of widespread insider trading.
In one high-profile case, the former US Senator and ex-Polymarket brand ambassador George Santos was accused of wagering on his own attendance at the State of the Union address earlier this year.
Kalshi Job Details Disclosures: Prediction Markets Respond to Backlash
The move comes just months after Kalshi announced the launch of what it called “technological guardrails.”
These protocols, it said, preemptively block politicians, athletes, and other relevant people from trading in certain politics and sports markets.
Kalshi previously relied on post-trade investigations to enforce its “no insider trading” policies.
But now, the operator said, its staff use screening tools that have so far let it block more than 100 possible insider trades.
The firm said in its most recent release that in the first quarter of 2026, it reported over 20 users to law enforcement agencies and launched more than 150 internal investigations.
Kalshi said it will not release details of these internal probes as these cases are still active.
Whistleblower Functions
Kalshi said it has also added features that let users make direct reports about “abusive trading activity.” It also said it has added a new platform for whistleblower reports.
Last month, the National Football League (NFL) called on the Commodity Futures Trading Commission to ban prediction market contracts on sports events that are “easily manipulable” by a single person.
Examples flagged by the NFL include the nature of the first play of a football game.
A quarterback or head coach’s decision to pass or run may hinge on a single individual, the league argued. And it could certainly be known in advance.
Other sports leagues have expressed similar concerns. The regulator has responded by speaking to “all the professional sports leagues” about ways to prevent insider trading.
The firm’s language in its latest release appears to reflect some of these concerns. It spoke of higher risk in markets that “turn on a decision by a single individual or opaque group with broad discretion.”
Kalshi said it will also use a new risk scoring method in its listing criteria.
“Less important markets that carry high insider or manipulation risk scores may be rejected from listing,” the company said.
Kalshi users have traded over $1.5 billion worth of contracts in the past seven days, per data compiled by DeFiLlama.
Scrutiny of prediction markets is intensifying elsewhere in the world. In South Korea, lawyers have issued a warning after a Polymarket user won $160,000 backing an underdog candidate in the June 3 Seoul mayoral election.
