Kalshi co-founder says in-house trading arm ‘not profitable’

Monday, December 1, 2025 3:24 PM
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  • United States
  • Daniel O'Boyle, In Game

Kalshi’s in-house market maker is “not profitable” and traded about $310 million on sports last month, according to one of the prediction market’s co-founders.

Luana Lopes Lara — who co-founded Kalshi with Tarek Mansour — posted on X in response to a class-action lawsuit filed in the U.S. District Court for the Southern District of New York last week.

The class action alleged that Kalshi was “duping” customers by advertising a peer-to-peer service while also operating an in-house market maker, Kalshi Trading. Kalshi Trading offers bets to users on many markets, typically on both sides of a contract.