Kalshi said on Thursday it has ended Donald Trump Jr.’s advisory role at the prediction market company, after his venture firm put more money into rival Polymarket.
The company called the split mutual. A Kalshi spokesperson told Reuters the two sides “have mutually agreed to end Don’s advisory role after his firm’s significant investment in a competitor this past summer.”

Trump Jr. joined Kalshi as a strategic adviser in January 2025 and received an equity stake valued at $300,000 at the time, according to the Financial Times. In August, his firm 1789 Capital led a funding round for Polymarket and added about $300 million to its investment in the rival, on top of roughly $200 million it had already put in.
Talks to end the advisory contract began in August, according to Reuters. Trump Jr. also joined Polymarket’s advisory board that month.
It is not clear whether Trump Jr. will keep the Kalshi shares he received as part of his compensation. Kalshi said political considerations played no role in the decision.
Source: New York Post