Flight-tracking company FlightAware has filed a lawsuit against prediction-markets operator Kalshi, alleging the platform improperly leveraged its proprietary information and brand to support wagering on flight cancellations. FlightAware accuses Kalshi of using its flight data and trademarks without authorization to operate what the filing describes as gambling markets tied to cancellation rates. FlightAware maintains that Kalshi previously agreed not to use its data for commercial activities, including gambling or prediction markets. Specifically, it requests a temporary restraining order along with preliminary and permanent injunctions that would prohibit Kalshi from further employing FlightAware data or trademarks in connection with these or similar markets. The dispute highlights ongoing tensions around the boundaries of prediction markets, the use of third-party data for settlement, and the reputational consequences when data providers become associated with high-stakes wagering products without their consent.