Kalshi topped the prediction markets with a nominal trading volume of $2.01 billion this week, followed by Opinionlabsxyz at $1.6 billion and Polymarket at $1.5 billion. The total trading volume across all platforms reached $5.26 billion. In terms of transaction count, Polymarket led with 11.4 million trades, closely followed by Kalshi with 11.08 million trades. Opinionlabsxyz recorded 683,000 trades, contributing to a total of 23.67 million trades across all platforms. Polymarket also had the highest number of users at 262,000, with Opinionlabsxyz and PredictProtocol following at 59,000 and 8,100 users, respectively.