Washington Attorney General Nick Brown filed a civil lawsuit against prediction market platform KalshiEx LLC this week, alleging the company runs an illegal online gambling operation in violation of state law.
Is Kalshi Legal in Washington State? AG Says No, Files Suit
The complaint, filed in King County Superior Court, targets Kalshi‘s binary event contracts, wagers priced between one cent and 99 cents that pay out $1 to winners and nothing to losers. Washing